EP0416623B1 - Electrical connector housing - Google Patents
Electrical connector housing Download PDFInfo
- Publication number
- EP0416623B1 EP0416623B1 EP19900117195 EP90117195A EP0416623B1 EP 0416623 B1 EP0416623 B1 EP 0416623B1 EP 19900117195 EP19900117195 EP 19900117195 EP 90117195 A EP90117195 A EP 90117195A EP 0416623 B1 EP0416623 B1 EP 0416623B1
- Authority
- EP
- European Patent Office
- Prior art keywords
- housing
- terminal retainer
- terminal
- cavities
- latching
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Lifetime
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Classifications
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01R—ELECTRICALLY-CONDUCTIVE CONNECTIONS; STRUCTURAL ASSOCIATIONS OF A PLURALITY OF MUTUALLY-INSULATED ELECTRICAL CONNECTING ELEMENTS; COUPLING DEVICES; CURRENT COLLECTORS
- H01R13/00—Details of coupling devices of the kinds covered by groups H01R12/70 or H01R24/00 - H01R33/00
- H01R13/40—Securing contact members in or to a base or case; Insulating of contact members
- H01R13/42—Securing in a demountable manner
- H01R13/436—Securing a plurality of contact members by one locking piece or operation
- H01R13/4364—Insertion of locking piece from the front
- H01R13/4365—Insertion of locking piece from the front comprising a temporary and a final locking position
Definitions
- This invention relates to an electrical connector insulating housing provided with means for locking electrical terminals in the housing.
- an electrical connector insulating housing defining a series of spaced, elongate, terminal receiving cavities surrounding an axis of the housing and extending lengthwise of said axis, the housing receiving a terminal retainer for angular displacement about said axis between a first angular position to allow electrical terminals to be inserted into the cavities and a second angular position to overlie abutments on the terminals when they have been inserted into the cavities to lock the terminals therein.
- the terminal retainer is received in a hood projecting from the housing, and is in the form of a circular cross-section block which presents a terminal receiving face of the housing. Since the terminal retainer must be angularly displaceable in the hood and cannot, therefore, be sealed thereto effectively, it is impracticable to seal the connector against the ingress of moisture by means of sealing grommets in the cavities.
- a housing as defined in the second paragraph of this specification is characterized in that the cavities are arranged in a single ring about said axis and the terminal retainer, which is annular, is mounted for said angular displacement on a spigot which projects as a cantilever within said ring of cavities from a housing wall extending transversely of the cavities; and in that the terminal retainer has radially outwardly directed terminal retaining members which intersect the cavities in the second angular position of the terminal retainer to overlie said abutments.
- the outer periphery of the housing is free to receive a sealing ring for the provision of keying or securing means thereon.
- the said transverse wall may be positioned substantially longitudinally centrally of the cavities.
- the terminal retainer is insertable into an annular recess defined by the housing, between the spigot and radially inner walls of the cavities, with the aid of guide means provided on the terminal retainer and cooperating with complementary guide means on the spigot or between the cavities, to locate the terminal retainer, in its first angular position, the terminal retainer having latching means cooperating with shoulders presented by said inner walls to latch the terminal retainer in its recess.
- the spigot has at least one latch arm formed with first and second external, circumferentially spaced latching notches and the terminal retainer has at least one inwardly directed latching spur for latching engagement with the first notch in the first position of the terminal retainer and in the second notch in the second position thereof.
- the resilience of the latch arm ensures that as the terminal retainer is rotated between its first and second angular positions, the latch arm is resiliently depressed, to allow the latching spur to pass from the first to the second notch with a snap action.
- the spigot may, according to this embodiment, be formed with a longitudinally indented keying surface proximate to said transverse wall and extending in the direction of the free end of the pigot, the terminal retainer having a radially inwardly projecting resilient keying pad shaped complementarily with said keying surface.
- keying means ensure that the terminal retainer is insertable into its recess, only in the first angular position of the terminal retainer, the resilience of the keying pad, nevertheless allowing the terminal retainer to be shifted from its first to its second angular position against the resilient action of the keying pad.
- Resilience may be imparted to the keying pad, which extends longitudinally of the terminal retainer, by forming it with an internal opening substantially throughout its length.
- the spigot may comprise an annular wall concentric with the axis of the housing and which extends from the transverse wall mentioned above, towards a mating face of the housing, a solid part exending from the annular wall towards the mating face, and, extending from the solid part up to the mating face, a longitudinally divided part providing said latch arm or latch the spigot and upon radially the outer surface of said annular wall.
- the spigot is formed as a simple tube of constant circular cross-section, the terminal retainer, having a circular cross-section bore for receiving the spigot, and having a pair of diametrically opposed latching spurs projecting radially outwardly thereof.
- the housing is formed, between the cavities which according to this embodiment, are few, being, for example, only four in number, with first and second circumferentially spaced latching notches each for receiving a latching tip of a respective latching spur in the first and second angular positions, respectively, of the terminal retainer.
- the terminal retainer In order to ensure that the terminal retainer can be mated with the spigot only in its first angular position, it may be provided with guide ribs extending longitudinally thereof and cooperating with guide surfaces between the cavities, to that end.
- the terminal retaining members are, according to the second embodiment, positioned proximate to the leading end of the terminal retainer.
- the guide ribs which are of substantially equal height to the terminal retaining members, but which are of considerably smaller width circumferentially, extend from the terminal retainer members towards the latching spurs.
- the latching notches extend radially outwardly from wells formed in the housing, between the cavities thereof, and opening into a mating face of the housing by way of which the terminal retainer is accessible so as to be movable between its first and second angular positions, for example by means of a tool blade inserted into a slot in the terminal retainer.
- Each well communicates in the circumferential direction of the housing, with a respective terminal receiving cavity and according to the second embodiment, is provided with arcuate side walls for cooperation with complementarily shaped surfaces for the guide ribs.
- An electrical connector housing 2 of circular cross-section, comprises for assembly thereto, a terminal retainer 4, ( Figures 5 to 9) and a coupling ring 6 (shown in Figures 10 and 11) for securing the housing 2 to a mating electrical connector housing (not shown).
- the housing 2 defines a single ring of seven spaced, terminal receiving, circular cross-section through cavities 8, concentric with the longitudinal axis X-X ( Figures 1 and 11) of the housing 2, each cavity 8 opening into a terminal, receiving rear face 10 of the housing 2 and into a mating, front face 12 thereof. Between the cavities 8, blind holes 14 were formed in the faces 10 and 12 during the molding of the housing 2, from a suitable insulating material, to provide relief for warpage of the material as it cooled after the molding operation.
- the housing 2 defines an annular recess 16 concentric with the axis X-X and with the ring of cavities 8, for receiving the terminal retainer 4.
- the recess 16 opens forwardly into the mating face 12 and communicates rearwardly with annular opening 18 which in turn communicates with each of the cavities 8.
- Each cavity 8 is shaped and dimensioned to receive an electrical terminal 28 ( Figures 11 and 11A).
- Each terminal 28 comprises a crimping ferrule 24 crimped to an insulated lead L and to a sealing grommet 26, a mounting portion 32, a circular abutment flange 44 between the ferrule 24 and the portion 32, and a mating portion 34 in the form of an electrical socket having a longitudinally extending latching tongue 40 struck out therefrom.
- Each cavity 8 has a large cross section part 22 for receiving the ferrule 24 and grommet 26, a smaller cross section part 30 for receiving the mounting portion 32, intermediate the cavity part 22 and a larger cross section part 36 for receiving the mating portion 34 of the terminal 28.
- each cavity 8 There is defined between the parts 22 and 30 of each cavity 8, an annular shoulder 42 for abutment by the flange 44 of the terminal 28, and between the parts 30 and 36 an annular shoulder 38 for engagement by the free, rearward end of the latching tongue 40 of the terminal 28.
- the radially inner wall 20 of the parts 30 and 36 of each cavity 8 defines an annular latching shoulder 21, projecting slightly into the recess 16.
- the radially inner wall 20′ of the part 22 defines star shaped cavity 23.
- a hood 46 formed with external keyways 48 each dimensioned to receive a respective key (not shown) in a hood of the said mating housing.
- the keyways 48 also extend inwardly, over part of an outer peripheral wall 50 of the housing 2.
- the keyways 48 will differ in configuration and arrangement from one housing 2 to another, as illustrated by way of example by the keyways 48′ in Figure 10.
- a latching ring 54 there projects from the terminal receiving face 10 of the housing 2 a skirt 52 and there extends radially outwardly from the wall 50, a latching ring 54, defining in cooperation therewith an annular socket 56 having a forward reduced cross section part 58 for receiving, as shown in Figure 11, a sealing ring 60, the part 58 communicating with a frusto-conical rear annular recess 62 into which the ring 60 is extruded when the housing 2 has been mated with said mating housing.
- the latching ring 54 is formed with resilient latch arms 64 distributed about its external periphery and having free ends which are rearwardly directed.
- each pair of adjacent arms 64 is an axial rib 66, the ring 54 being formed rearwardly of the free ends of the arms 64, with a peripheral groove 68.
- the coupling ring 6 has radially inwardly projecting studs 70 ( Figure 10) for meshing with a screw thread of said mating housing.
- the former is provided with finger grips 72 ( Figure 11) and with angular position indicators 74 for coincidence with complementary indicators on said mating housing to indicate when housings have been correctly secured together by means of the coupling ring 6.
- a substantially circular overall cross section spigot 78 (best seen in Figures 1 to 3 and 9) providing a pivot for the terminal retainer 4 when mated with the spigot 78, projects forwardly into the recess 16 from an annular wall 80 projecting radially inwardly from the walls 20′ and being positioned generally centrally of the length of the cavities 8.
- the spigot 78 comprises an annular rear wall portion 82 concentric with the axis X-X and defining a space 84 rearwardly of a body portion 86 of the spigot 78, the portion 86 extending forwardly from the wall 82 and comprising a solid rear part 88 and a longitudinally divided forward part 90 formed with two spaced longitudinal slots 92 running from the free forward end 94 of the body portion 86.
- the part 88 and the wall 82 are formed radially outwardly thereof and upon one side, with an undulating, (as best seen in cross section Figure 9), keying surface 96 defining a pair of spaced, arcuately concave troughs 98 extending longitudinally of the spigot 78 and being separated by a convexly arcuate cusp 99.
- the slots 92 in the forward part 90 cooperate to define a central column 100, which terminates in a flat surface 102 at said forward end 94.
- the column 100 has parallel flat sides 104 and arcuately convex end walls 106 and 107, the latter terminating at the end 94 in a chamfered guide surface 110 and the former being aligned with the cusp 99.
- the slots 92 serve to define, opposite to each side 104, a resilient latch arm 109. Each arm 109 is formed with a pair of radially spaced, longitudinal latching notches 108 and 108′ respectively.
- the terminal retainer 4 which is in the form of an open ended tube of substantially circular cross section, is formed proximate to its leading end 112, (that is to say its end which leads when the retainer 4 is mated with the spigot 78), with a ring of seven terminal locking members in the form of studs 114, spaced constantly about its outer periphery with the same spacing as that between the cavities 8.
- the studs 114 taper in height in a clockwise (as seen in Figure 6) sense.
- Outer periphery of the retainer 4 is also formed with a latching rib 116 extending continuously thereabout and tapering in height in the direction of the leading end 112.
- a keying pad 122 which is resilient by virtue of an opening 124 therein which, as shown in Figure 8, extends substantially throughout its length, projects internally of the retainer 4, and has a wall 126 facing inwardly thereof and being provided with a pair of spaced longitudinal ribs 128 each for engaging in a respective trough 98 of the part 88 in the wall 82 of the spigot 78.
- the pad 122 is positioned somewhat nearer to the end 122 than to the end 118 and is located angularly, midway between the two spurs 120.
- the retainer 4 is formed with diametrically opposed slots 130 for receiving a tool blade (not shown) for rotating the terminal retainer 4 when it has been mated with the spigot 78, between terminal receiving, and terminal locking positions, as described below.
- the terminal retainer 4 is assembled to the housing 2, that is to say it is mated with the spigot 78, by inserting the retainer 4 into the recess 16 from the mating face 12 of the housing 2 with the end 112 of the retainer 4 leading and the keying pad 122 aligned with the keying surface 96 of the spigot 78.
- the ribs 128 of the pad 122 engage in (as indicated in broken lines in Figure 9) and pass along, the slots 92 of the spigot 78, until they engage in the troughs 98.
- each spur 120 thereof engages the latching notch 108 of a respective latch arm 109.
- the terminal retainer 4 is then in a terminal receiving angular position as shown in Figure 10 and as shown in full lines in Figure 12 and is held in that position by virtue of the resilient engagement of the ribs 128 of the pad 122 in the troughs 98 of the spigot 78.
- the retainer 4 cannot be assembled to the housing 2 with the spurs 120 in the notches 108′.
- terminal locking studs 114 lie between the cavities 8 and so do not obstruct them, a terminal 28 can now be inserted into each cavity 8 from the terminal receiving face 10.
- the terminals 28 are latched in their cavities by cooperation between their latching tongues 40 and the shoulders 38 in the cavities 8.
- the terminals 28 could still back out from their cavities under the action of vibration, if the leads L are pulled, when the housing is in use, as the struck out tongues 40 will not normally be robust enough to prevent such terminal backout, since the metal stock from which the terminals were formed will usually be very thin.
- the tool blade is inserted into the slots 130 of the trailing end 118 of the retainer 4, which are accessible from the mating face 12, and the blade is rotated angularly to shift the terminal retainer 4 a few degrees in a clockwise (as seen in Figure 10) sense, against the resilient action of the pad 122, to cause each spur 120 of the retainer 4 to snap into locking engagement with the adjacent notch 108′ of the spigot 78, so that as shown in Figure 12 in broken lines, and as shown in Figure 11, each locking stud 114 of the retainer 4 is moved into the respective cavity 8 so as to overlie the abutment flange 44 of the terminal 28 therein so that the terminal can under no circumstances back out therefrom.
- An electrical connector housing 140 of substantially circular overall cross section comprises for assembly thereto a terminal retainer 142, and a coupling ring 6a.
- the housing 140 defines a single ring of four spaced terminal receiving cavities 8a each opening into the terminal receiving rear face 10a of the housing 140 and into the mating front face 12a thereof.
- the cavities 8a are of the same configuration as the cavities 8, being dimensioned to receive the terminals 28 described above.
- a wall 144 extending between the walls 20 a of the cavities 8a at right angles thereto and being positioned generally centrally their length, provides, as best seen in Figures 13 and 16, a base for a circular constant cross-section, tubular spigot 146 which projects forwardly from the wall 144 up to the mating face 12a of the housing 140 and has a free end 148 substantially flush with the face 12a as shown in Figure 16.
- the spigot 146 cooperates with the body 153 of the housing 140 to define the annular recess 152 to allow the terminal retainer 142 to be mated with the spigot 146 so that the latter acts as a pivot for the retainer 142 as described below.
- the recess 152 opens radially outwardly, into four wells 156 which are constantly spaced about the axis X-X of the housing 140 and are defined by the body 153, each well 156 opening into the mating face 12a and being disposed between the cavities 8a of an adjacent pair of those cavities.
- the wells 156 also communicate with openings 154 in the body 153, each of Which in turn communicates with the interior of the part 22a of a respective cavity 8a.
- Each opening 154 extends, in the longitudinal direction of the cavities 8a, from the shoulder 42a in the respective cavity portion 22a, to a position spaced forwardly from wall 144 by a short length 159 of the recess 152.
- the wells 156 have smoothly inwardly convex sidewalls 157, as best seen in Figure 14.
- the radially outer end of each well 156 opens into a pair of circumferentially spaced latching notches 158 and 158′ (best seen in Figures 14 and 23) at the forward end of the spigot 146 and which open into the mating face 12a.
- the notches 158 and 158a of each pair are located midway between two adjacent ones of the cavities 8a.
- the cavity wall 20a defines the latching shoulder 21a which can best be seen in Figures 1 and 16.
- the terminal retainer 142 will now be described with a particular reference to Figures 17 to 20.
- the retainer 142 comprises a tubular body 162 having a leading end 164 and a trailing end 166 and defining a central through bore 168 dimensioned to receive the spigot 146.
- the end 164 is presented by a nose 170 which is chamfered theretowards but is otherwise of constant cross section.
- terminal locking studs 172 which are constantly spaced from one another about the body 162 by an angular distance corresponding to that between the cavities 8a.
- Each stud 172 has a terminal locking edge portion 174 best seen in Figure 18.
- each stud 172 there extends from each stud 172 towards the end 166 of the body 162, a guide rib 176 which is of smaller Width circumferentially of the body 162, than the stud 172 and which terminates radially outwardly, in a rounded nose 178.
- Each rib 176 has concave sides 177, the smooth curvature of which is complementary with that of the side walls 157 of the wells 156.
- the body 162 is formed with four circumferentially aligned, latching ribs 180, each positioned between the ribs 176 of an adjacent pair and being spaced from the studs 172 towards the trailing end 166 of the retainer 142.
- the body 162 is further formed, with a pair of diametrically opposed latching spurs 182 spaced from the ribs 176 in a direction away from the leading end 164 and each having a radially outwardly tapered latching tip 184, the tips 184 being oppositely inclined circumferentially of the retainer 142, as best seen in Figures 18 and 23.
- There open into the trailing 166 a pair of aligned slots 186 with chamfered guide edges 188 to receive a tool blade (not shown), for angularly displacing the retainer 142 between terminal receiving, and terminal latching angular positions when it has been assembled to the housing 140 as described below.
- the terminal retainer 142 With its end 164 leading, is mated with the spigot 146, so as to be received in the recess 152 until the ribs 180 snap into latching engagement behind respective shoulders 21a in the cavities 8a, and the nose 170 is received in the length 159 of the recess 152.
- the studs 172 are then each disposed in a respective well 156 as will be apparent from Figure 23.
- the side 177 of the ribs 176 which, during the mating of the retainer 142 with the spigot 146 engage the side walls 157 of the wells 156 serve to guide the latching tip 184 of each spur 182 into a respective notch 158, these notches being diametrically opposite to one another.
- Terminal retainer 142 is then in its terminal insertion angular position, since the edge portions 174 of the studs 172 lie between the cavities 8a and so do not obstruct them. Terminals 28 are then inserted into the cavities 8a so that the latching tongues 34 of the terminals latch behind the shoulders 38a in those cavities.
- the said tool blade is inserted into the slots 186 of the retainer 142, which are accessible from the mating face 12a, and the tool is employed to rotate the retainer 142 through a few degrees about the spigot 146, to displace the latching tips 184 of the spurs 182 each from its notch 158 into the adjacent notch 158′, whereby the retainer 142 is latched in its terminal locking angular position in which the locking edge portions 174 of the studs 172 lie just behind the flanges 144 of the terminals 28 so as to prevent their withdrawal from the cavities 8a, as shown in Figure 22, in which the spigot 146 and the terminal retainer 142 are shown as being cut back to reveal a pair of the notches 158 and 158′.
- each rib 176 has two opposite sides 177 which are of the same configuration.
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- Details Of Connecting Devices For Male And Female Coupling (AREA)
Description
- This invention relates to an electrical connector insulating housing provided with means for locking electrical terminals in the housing.
- There is disclosed in DE-U-8508465.4 an electrical connector insulating housing defining a series of spaced, elongate, terminal receiving cavities surrounding an axis of the housing and extending lengthwise of said axis, the housing receiving a terminal retainer for angular displacement about said axis between a first angular position to allow electrical terminals to be inserted into the cavities and a second angular position to overlie abutments on the terminals when they have been inserted into the cavities to lock the terminals therein.
- In this known housing, the terminal retainer is received in a hood projecting from the housing, and is in the form of a circular cross-section block which presents a terminal receiving face of the housing. Since the terminal retainer must be angularly displaceable in the hood and cannot, therefore, be sealed thereto effectively, it is impracticable to seal the connector against the ingress of moisture by means of sealing grommets in the cavities. Although it has been proposed to avoid this disadvantage, by making the terminal retainer annular, and arranging it in surrounding relationship with the housing, in this case, because of the presence of the annular terminal retainer, the external periphery of the housing cannot be provided with keying means for cooperation with keying means on a mating electrical connector or indeed with any other means, for example a sealing ring, or means for securing the housing to a mating housing.
- According to the present invention, a housing as defined in the second paragraph of this specification, is characterized in that the cavities are arranged in a single ring about said axis and the terminal retainer, which is annular, is mounted for said angular displacement on a spigot which projects as a cantilever within said ring of cavities from a housing wall extending transversely of the cavities; and in that the terminal retainer has radially outwardly directed terminal retaining members which intersect the cavities in the second angular position of the terminal retainer to overlie said abutments.
- Since the terminal retainer is disposed within the single ring of terminal receiving cavities, the outer periphery of the housing is free to receive a sealing ring for the provision of keying or securing means thereon.
- For economy of the housing material, the said transverse wall may be positioned substantially longitudinally centrally of the cavities.
- According to embodiments of the invention, the terminal retainer is insertable into an annular recess defined by the housing, between the spigot and radially inner walls of the cavities, with the aid of guide means provided on the terminal retainer and cooperating with complementary guide means on the spigot or between the cavities, to locate the terminal retainer, in its first angular position, the terminal retainer having latching means cooperating with shoulders presented by said inner walls to latch the terminal retainer in its recess.
- According to a first embodiment of the invention, in which the cavities may, for example, be seven in number, the spigot has at least one latch arm formed with first and second external, circumferentially spaced latching notches and the terminal retainer has at least one inwardly directed latching spur for latching engagement with the first notch in the first position of the terminal retainer and in the second notch in the second position thereof. The resilience of the latch arm, ensures that as the terminal retainer is rotated between its first and second angular positions, the latch arm is resiliently depressed, to allow the latching spur to pass from the first to the second notch with a snap action.
- The spigot may, according to this embodiment, be formed with a longitudinally indented keying surface proximate to said transverse wall and extending in the direction of the free end of the pigot, the terminal retainer having a radially inwardly projecting resilient keying pad shaped complementarily with said keying surface. These keying means ensure that the terminal retainer is insertable into its recess, only in the first angular position of the terminal retainer, the resilience of the keying pad, nevertheless allowing the terminal retainer to be shifted from its first to its second angular position against the resilient action of the keying pad. Resilience may be imparted to the keying pad, which extends longitudinally of the terminal retainer, by forming it with an internal opening substantially throughout its length.
- The spigot may comprise an annular wall concentric with the axis of the housing and which extends from the transverse wall mentioned above, towards a mating face of the housing, a solid part exending from the annular wall towards the mating face, and, extending from the solid part up to the mating face, a longitudinally divided part providing said latch arm or latch the spigot and upon radially the outer surface of said annular wall.
- According to a second embodiment of the invention, the spigot is formed as a simple tube of constant circular cross-section, the terminal retainer, having a circular cross-section bore for receiving the spigot, and having a pair of diametrically opposed latching spurs projecting radially outwardly thereof. The housing is formed, between the cavities which according to this embodiment, are few, being, for example, only four in number, with first and second circumferentially spaced latching notches each for receiving a latching tip of a respective latching spur in the first and second angular positions, respectively, of the terminal retainer. In order to ensure that the terminal retainer can be mated with the spigot only in its first angular position, it may be provided with guide ribs extending longitudinally thereof and cooperating with guide surfaces between the cavities, to that end. The terminal retaining members are, according to the second embodiment, positioned proximate to the leading end of the terminal retainer. The guide ribs, which are of substantially equal height to the terminal retaining members, but which are of considerably smaller width circumferentially, extend from the terminal retainer members towards the latching spurs.
- The latching notches extend radially outwardly from wells formed in the housing, between the cavities thereof, and opening into a mating face of the housing by way of which the terminal retainer is accessible so as to be movable between its first and second angular positions, for example by means of a tool blade inserted into a slot in the terminal retainer. Each well communicates in the circumferential direction of the housing, with a respective terminal receiving cavity and according to the second embodiment, is provided with arcuate side walls for cooperation with complementarily shaped surfaces for the guide ribs.
- For a better understanding of the invention and to show how it may be carried into effect, two embodiments thereof will now be described by way of example with reference to the accompanying drawings in which:
- FIGURE 1 is an enlarged side view shown partly in axial section, of an electrical connector housing for receiving a terminal retainer, according to a first embodiment of the invention;
- FIGURE 2 is a fragmentary front end view of the housing shown in Figure 1;
- FIGURE 3 is a fragmentary sectional view taken on the lines 3-3 of Figure 2;
- FIGURE 4 is a fragmentary rear end view of the housing shown in Figure 1;
- FIGURE 5 is a side view shown partly in axial section of the terminal retainer;
- FIGURE 6 is a front end view of the terminal retainer;
- FIGURE 7 is a rear end view of the terminal retainer;
- FIGURE 8 is a fragmentary sectional view taken on the lines 8-8 of Figure 6;
- FIGURE 9 is an enlarged isometric view of a central spigot of the housing of Figures 1 to 4, shown partly in section on the lines 9-9 of Figure 1;
- FIGURE 10 is a front end view of the housing drawn to a smaller scale than Figures 1 to 9, illustrating a modification and showing the terminal retainer and a coupling ring assembled to the housing, the terminal retainer being shown in a terminal insertion angular position about the spigot;
- FIGURE 11 is a side view of Figure 10 shown partly in axial section and indicating in broken lines an electrical terminal inserted into a terminal receiving cavity of the housing, the terminal retainer being shown in a terminal locking angular position about the spigot;
- FIGURE 11A is a side view of the electrical terminal;
- FIGURE 12 is an enlarged fragmentary front view illustrating details of the housing as shown in Figure 10, the terminal retainer being shown in its terminal locking position in broken lines;
- FlGURE 13 is an enlarged side view shown partly in axial section, of an electrical connector housing for receiving a terminal retainer, according to a second embodiment of the invention;
- FIGURE 14 is a front view of the housing of Figure 13;
- FIGURE 15 is a rear view of the housing of Figures 13 and 14;
-
FlGURE 16 is a fragmentary sectional view illustrating details of Figure 13; - FIGURE 17 is an enlarged side view of the terminal retainer for the housing of Figures 13 to 16;
- FIGURE 18 is a rear end view of the terminal retainer shown in Figure 17;
- FIGURE 19 is a view taken on the lines 19-19 of Figure 18;
- FIGURE 20 is a front end view of the terminal retainer of Figures 17 to 19;
- FIGURE 21 is a front end view of the housing of Figures 13 to 16 with the terminal retainer thereof assembled thereto and in a terminal insertion angular position;
- FIGURE 22 is a side view shown partly in longitudinal section of the housing shown in Figure 21 but with the terminal retainer in a terminal locking angular position therein and an electrical terminal shown in broken lines; and
- FIGURE 23 is an enlarged fragmentary front view showing details of Figure 21.
- The first embodiment of the invention will now be described with reference to Figures 1 to 12. An electrical connector housing 2, of circular cross-section, comprises for assembly thereto, a
terminal retainer 4, (Figures 5 to 9) and a coupling ring 6 (shown in Figures 10 and 11) for securing thehousing 2 to a mating electrical connector housing (not shown). - As shown in Figures 2, 4 and 10, the
housing 2 defines a single ring of seven spaced, terminal receiving, circular cross-section throughcavities 8, concentric with the longitudinal axis X-X (Figures 1 and 11) of thehousing 2, eachcavity 8 opening into a terminal, receivingrear face 10 of thehousing 2 and into a mating,front face 12 thereof. Between thecavities 8,blind holes 14 were formed in thefaces housing 2, from a suitable insulating material, to provide relief for warpage of the material as it cooled after the molding operation. - As best seen in Figures 1 and 2, the
housing 2 defines anannular recess 16 concentric with the axis X-X and with the ring ofcavities 8, for receiving theterminal retainer 4. Therecess 16 opens forwardly into themating face 12 and communicates rearwardly withannular opening 18 which in turn communicates with each of thecavities 8. - Each
cavity 8 is shaped and dimensioned to receive an electrical terminal 28 (Figures 11 and 11A). Eachterminal 28 comprises a crimpingferrule 24 crimped to an insulated lead L and to a sealinggrommet 26, amounting portion 32, acircular abutment flange 44 between theferrule 24 and theportion 32, and amating portion 34 in the form of an electrical socket having a longitudinally extendinglatching tongue 40 struck out therefrom. Eachcavity 8 has a largecross section part 22 for receiving theferrule 24 and grommet 26, a smallercross section part 30 for receiving themounting portion 32, intermediate thecavity part 22 and a largercross section part 36 for receiving themating portion 34 of theterminal 28. There is defined between theparts cavity 8, anannular shoulder 42 for abutment by theflange 44 of theterminal 28, and between theparts annular shoulder 38 for engagement by the free, rearward end of thelatching tongue 40 of theterminal 28. Whenterminals 28 are assembled in thehousing 2, the free ends of themating portions 34 of theterminals 28 are substantially flush with themating face 12 of thehousing 2, the leads L projecting from theterminal receiving face 10. - The radially
inner wall 20 of theparts cavity 8 defines anannular latching shoulder 21, projecting slightly into therecess 16. The radiallyinner wall 20′ of thepart 22 defines star shapedcavity 23. - There projects from the
mating face 12, ahood 46 formed withexternal keyways 48 each dimensioned to receive a respective key (not shown) in a hood of the said mating housing. Thekeyways 48 also extend inwardly, over part of an outerperipheral wall 50 of thehousing 2. Thekeyways 48 will differ in configuration and arrangement from onehousing 2 to another, as illustrated by way of example by thekeyways 48′ in Figure 10. There projects from theterminal receiving face 10 of the housing 2 askirt 52 and there extends radially outwardly from thewall 50, alatching ring 54, defining in cooperation therewith anannular socket 56 having a forward reducedcross section part 58 for receiving, as shown in Figure 11, asealing ring 60, thepart 58 communicating with a frusto-conical rearannular recess 62 into which thering 60 is extruded when thehousing 2 has been mated with said mating housing. Thelatching ring 54 is formed with resilientlatch arms 64 distributed about its external periphery and having free ends which are rearwardly directed. Between each pair ofadjacent arms 64, is an axial rib 66, thering 54 being formed rearwardly of the free ends of thearms 64, with aperipheral groove 68. Thecoupling ring 6 has radially inwardly projecting studs 70 (Figure 10) for meshing with a screw thread of said mating housing. When thecoupling ring 6 has been assembled to thehousing 2, thelatch arms 64 are depressed by peripherally spaced internal ribs (not shown) on thecoupling ring 6 which ribs resiliently depress thelatch arms 64 and then engage in thegroove 68, thelatch arms 64 then resiling to latch thering 6 to thering 54. To aid in screwing thecoupling ring 6 to the mating housing, the former is provided with finger grips 72 (Figure 11) and withangular position indicators 74 for coincidence with complementary indicators on said mating housing to indicate when housings have been correctly secured together by means of thecoupling ring 6. - A substantially circular overall cross section spigot 78 (best seen in Figures 1 to 3 and 9) providing a pivot for the
terminal retainer 4 when mated with thespigot 78, projects forwardly into therecess 16 from anannular wall 80 projecting radially inwardly from thewalls 20′ and being positioned generally centrally of the length of thecavities 8. Thespigot 78 comprises an annularrear wall portion 82 concentric with the axis X-X and defining aspace 84 rearwardly of abody portion 86 of thespigot 78, theportion 86 extending forwardly from thewall 82 and comprising a solidrear part 88 and a longitudinally divided forwardpart 90 formed with two spacedlongitudinal slots 92 running from the freeforward end 94 of thebody portion 86. Thepart 88 and thewall 82 are formed radially outwardly thereof and upon one side, with an undulating, (as best seen in cross section Figure 9), keyingsurface 96 defining a pair of spaced, arcuatelyconcave troughs 98 extending longitudinally of thespigot 78 and being separated by a convexlyarcuate cusp 99. Theslots 92 in theforward part 90 cooperate to define acentral column 100, which terminates in aflat surface 102 at saidforward end 94. Thecolumn 100 has parallelflat sides 104 and arcuatelyconvex end walls end 94 in achamfered guide surface 110 and the former being aligned with thecusp 99. Theslots 92 serve to define, opposite to eachside 104, aresilient latch arm 109. Eacharm 109 is formed with a pair of radially spaced,longitudinal latching notches - As best seen in Figures 5 to 8, the
terminal retainer 4, which is in the form of an open ended tube of substantially circular cross section, is formed proximate to itsleading end 112, (that is to say its end which leads when theretainer 4 is mated with the spigot 78), with a ring of seven terminal locking members in the form ofstuds 114, spaced constantly about its outer periphery with the same spacing as that between thecavities 8. Thestuds 114 taper in height in a clockwise (as seen in Figure 6) sense. Outer periphery of theretainer 4 is also formed with a latchingrib 116 extending continuously thereabout and tapering in height in the direction of theleading end 112. Proximate to its trailingend 118, the internal periphery of theretainer 4 is formed with two diametrically opposite latching spurs 120. Akeying pad 122, which is resilient by virtue of anopening 124 therein which, as shown in Figure 8, extends substantially throughout its length, projects internally of theretainer 4, and has awall 126 facing inwardly thereof and being provided with a pair of spacedlongitudinal ribs 128 each for engaging in arespective trough 98 of thepart 88 in thewall 82 of thespigot 78. Thepad 122 is positioned somewhat nearer to theend 122 than to theend 118 and is located angularly, midway between the two spurs 120. At its trailingend 118, theretainer 4 is formed with diametricallyopposed slots 130 for receiving a tool blade (not shown) for rotating theterminal retainer 4 when it has been mated with thespigot 78, between terminal receiving, and terminal locking positions, as described below. - The
terminal retainer 4 is assembled to thehousing 2, that is to say it is mated with thespigot 78, by inserting theretainer 4 into therecess 16 from themating face 12 of thehousing 2 with theend 112 of theretainer 4 leading and thekeying pad 122 aligned with the keyingsurface 96 of thespigot 78. As theretainer 4 enters therecess 16, theribs 128 of thepad 122 engage in (as indicated in broken lines in Figure 9) and pass along, theslots 92 of thespigot 78, until they engage in thetroughs 98. During the advance of theretainer 4 into therecess 16, the latchingrib 116, which is resiliently depressed by thewall 20 of thehousing 2, finally snaps into engagement withshoulder 21 thereby securing theretainer 4 against backing out from therecess 16. In this fully mated position of theretainer 4, each spur 120 thereof engages the latchingnotch 108 of arespective latch arm 109. Theterminal retainer 4 is then in a terminal receiving angular position as shown in Figure 10 and as shown in full lines in Figure 12 and is held in that position by virtue of the resilient engagement of theribs 128 of thepad 122 in thetroughs 98 of thespigot 78. By virtue of the keying action on thesurface 96 and thepad 122, theretainer 4 cannot be assembled to thehousing 2 with thespurs 120 in thenotches 108′. - Since the
terminal locking studs 114 lie between thecavities 8 and so do not obstruct them, a terminal 28 can now be inserted into eachcavity 8 from theterminal receiving face 10. As will be apparent from the above description relating to Figures 1, 11 and 11A, theterminals 28 are latched in their cavities by cooperation between their latchingtongues 40 and theshoulders 38 in thecavities 8. In spite of this latching action, theterminals 28 could still back out from their cavities under the action of vibration, if the leads L are pulled, when the housing is in use, as the struck outtongues 40 will not normally be robust enough to prevent such terminal backout, since the metal stock from which the terminals were formed will usually be very thin. In order to prevent theterminals 28 from backing out from thecavities 8, under the circumstances outlined above, the tool blade is inserted into theslots 130 of the trailingend 118 of theretainer 4, which are accessible from themating face 12, and the blade is rotated angularly to shift the terminal retainer 4 a few degrees in a clockwise (as seen in Figure 10) sense, against the resilient action of thepad 122, to cause each spur 120 of theretainer 4 to snap into locking engagement with theadjacent notch 108′ of thespigot 78, so that as shown in Figure 12 in broken lines, and as shown in Figure 11, each lockingstud 114 of theretainer 4 is moved into therespective cavity 8 so as to overlie theabutment flange 44 of the terminal 28 therein so that the terminal can under no circumstances back out therefrom. - The second embodiment of the invention will now be described with reference to Figures 13 to 23, in which certain of the parts already described above with reference to Figures 1 to 12 bear same reference numerals thereas but with the addition of the index letter "a", in the interest of avoiding undue repetition in the description relating to Figures 13 to 23. An
electrical connector housing 140 of substantially circular overall cross section, comprises for assembly thereto aterminal retainer 142, and acoupling ring 6a. Thehousing 140 defines a single ring of four spacedterminal receiving cavities 8a each opening into the terminal receivingrear face 10a of thehousing 140 and into themating front face 12a thereof. Thecavities 8a are of the same configuration as thecavities 8, being dimensioned to receive theterminals 28 described above. - A
wall 144 extending between thewalls 20 a of thecavities 8a at right angles thereto and being positioned generally centrally their length, provides, as best seen in Figures 13 and 16, a base for a circular constant cross-section,tubular spigot 146 which projects forwardly from thewall 144 up to themating face 12a of thehousing 140 and has afree end 148 substantially flush with theface 12a as shown in Figure 16. Thespigot 146 cooperates with thebody 153 of thehousing 140 to define theannular recess 152 to allow theterminal retainer 142 to be mated with thespigot 146 so that the latter acts as a pivot for theretainer 142 as described below. Therecess 152 opens radially outwardly, into fourwells 156 which are constantly spaced about the axis X-X of thehousing 140 and are defined by thebody 153, each well 156 opening into themating face 12a and being disposed between thecavities 8a of an adjacent pair of those cavities. Thewells 156 also communicate withopenings 154 in thebody 153, each of Which in turn communicates with the interior of thepart 22a of arespective cavity 8a. Eachopening 154 extends, in the longitudinal direction of thecavities 8a, from theshoulder 42a in therespective cavity portion 22a, to a position spaced forwardly fromwall 144 by a short length 159 of therecess 152. Thewells 156 have smoothly inwardlyconvex sidewalls 157, as best seen in Figure 14. The radially outer end of each well 156 opens into a pair of circumferentially spaced latchingnotches spigot 146 and which open into themating face 12a. Thenotches 158 and 158a of each pair are located midway between two adjacent ones of thecavities 8a. At the forward end of each opening 154 in the wall of eachcavity 8a thecavity wall 20a defines the latching shoulder 21a which can best be seen in Figures 1 and 16. - The
terminal retainer 142 will now be described with a particular reference to Figures 17 to 20. Theretainer 142 comprises atubular body 162 having aleading end 164 and a trailingend 166 and defining a central throughbore 168 dimensioned to receive thespigot 146. Theend 164 is presented by anose 170 which is chamfered theretowards but is otherwise of constant cross section. There project radially outwardly from thebody 162 just behind thenose 170terminal locking studs 172 which are constantly spaced from one another about thebody 162 by an angular distance corresponding to that between thecavities 8a. Eachstud 172 has a terminallocking edge portion 174 best seen in Figure 18. There extends from eachstud 172 towards theend 166 of thebody 162, aguide rib 176 which is of smaller Width circumferentially of thebody 162, than thestud 172 and which terminates radially outwardly, in arounded nose 178. Eachrib 176 has concave sides 177, the smooth curvature of which is complementary with that of theside walls 157 of thewells 156. Thebody 162 is formed with four circumferentially aligned, latchingribs 180, each positioned between theribs 176 of an adjacent pair and being spaced from thestuds 172 towards the trailingend 166 of theretainer 142. - The
body 162 is further formed, with a pair of diametrically opposed latching spurs 182 spaced from theribs 176 in a direction away from theleading end 164 and each having a radially outwardlytapered latching tip 184, thetips 184 being oppositely inclined circumferentially of theretainer 142, as best seen in Figures 18 and 23. There open into the trailing 166 a pair of alignedslots 186 with chamfered guide edges 188 to receive a tool blade (not shown), for angularly displacing theretainer 142 between terminal receiving, and terminal latching angular positions when it has been assembled to thehousing 140 as described below. In order to do this, theterminal retainer 142, with itsend 164 leading, is mated with thespigot 146, so as to be received in therecess 152 until theribs 180 snap into latching engagement behind respective shoulders 21a in thecavities 8a, and thenose 170 is received in the length 159 of therecess 152. Thestuds 172 are then each disposed in arespective well 156 as will be apparent from Figure 23. The side 177 of theribs 176, which, during the mating of theretainer 142 with thespigot 146 engage theside walls 157 of thewells 156 serve to guide thelatching tip 184 of each spur 182 into arespective notch 158, these notches being diametrically opposite to one another.Terminal retainer 142 is then in its terminal insertion angular position, since theedge portions 174 of thestuds 172 lie between thecavities 8a and so do not obstruct them.Terminals 28 are then inserted into thecavities 8a so that the latchingtongues 34 of the terminals latch behind theshoulders 38a in those cavities. In order to shift theterminal retainer 142 from its terminal receiving position to its terminal locking position, the said tool blade is inserted into theslots 186 of theretainer 142, which are accessible from themating face 12a, and the tool is employed to rotate theretainer 142 through a few degrees about thespigot 146, to displace the latchingtips 184 of thespurs 182 each from itsnotch 158 into theadjacent notch 158′, whereby theretainer 142 is latched in its terminal locking angular position in which thelocking edge portions 174 of thestuds 172 lie just behind theflanges 144 of theterminals 28 so as to prevent their withdrawal from thecavities 8a, as shown in Figure 22, in which thespigot 146 and theterminal retainer 142 are shown as being cut back to reveal a pair of thenotches - It will be apparent from Figures 14, 21 and 23 that four pairs of latching
notches terminal retainer 142 has only one pair of matching spurs 182, thus enabling theterminal retainer 142 to be mated with thespigot 146 in two different angular orientations spaced from one another by 45°. Be it noted that eachrib 176 has two opposite sides 177 which are of the same configuration.
Claims (10)
- An electrical connector insulating housing (2 or 140) defining a series of spaced, elongate, terminal receiving cavities (8 or 8a) surrounding an axis (XX) of the housing (2) and extending lengthwise of said axis (X-X), the housing receiving a terminal retainer (4 or 142) for angular displacement about said axis (X-X) between a first angular position to allow electrical terminals (28) to be inserted into the cavities (8 or 8a) and a second angular position to overlie abutments (44) on the terminals (28) when they have been inserted into the cavities (8 or 8a), to lock the terminals therein; characterized in that the cavities (8 or 8a) are arranged in a single ring about said axis (X-X) and the terminal retainer (4 or 142), which is annular, is mounted for said angular displacement on a spigot (78 or 146) which projects as a cantilever within said ring of cavities (8 or 8a) from a housing wall (80 or 144) extending transversely of the cavities (8 or 8a); and in that the terminal retainer (4 or 142) has radially outwardly directed terminal retaining members (114 or 172) which intersect the cavities (8 or 8a) in the second angular position of the terminal retainer (4 or 142) to overlie the abutments (44) of the terminals (28).
- A housing according to claim 1, characterized in that said transverse wall (80 or 144) is positioned generally longitudinally centrally of the cavities (8 or 8a).
- A housing according to claim 1 or 2,
characterized in that the terminal retainer (4 or 142) is insertable into an annular recess (16 or 152) defined by the housing (2 or 140), between the spigot (78 or 146) and radially inner walls (20 or 20a) of the cavities (8 or 8a), with the aid of guide means (122 or 176) provided on the terminal retainer (4 or 142) and cooperating with complementary guide means (96 or 157) on the spigot (78) or between the cavities (8 or 8a), to locate the terminal retainer (4 or 142) in its first angular position, the terminal retainer (4 or 142) having a latching means (116 or 180) cooperating with shoulders (21 or 21a) presented by said inner walls (20 or 20a) to latch the terminal retainer (4 or 142) in said recess (16 or 152). - A housing according to claim 1, 2 or 3,
characterized in that the spigot (78) has at least one latch arm (109) formed with first and second external, circumferentially spaced, latching notches (108 and 108′), the terminal retainer (4) having at least one inwardly directed latching spur (120) for latching engagement with the first notch (108) in the first position of the terminal retainer (4) and in the second notch (108′) in the second position of the terminal retainer. - A housing according to claim 1, 2, 3 or 4
characterized in that the cantilever spigot (78) is formed with a longitudinally indented keying surface (96) proximate to said transverse wall (80) and extending in the direction of the free end (94) of the spigot (78), the terminal retainer (4) having a radially inwardly projecting resilient keying pad (122), shaped complementary with said keying surface (96), and which is aligned therewith in the first angular position of the terminal retainer (4). - A housing according to claim 5, characterized in that said keying pad (122) which extends longitudinally of the terminal retainer (4) is formed with an internal opening (124) substantially throughout its length, a wall (126) of the keying pad (122) having an external surface facing inwardly of the terminal retainer (4) and being formed with a pair of spaced longitudinal ribs (128) each for engaging in a trough (98) of said keying surface (96).
- A housing according to any of the preceding claims, characterized in that the spigot (78) comprises an annular wall (82) concentric with said axis (X) and which extends from said housing wall (80) towards a mating face (12) of the housing (2), a solid part (88) extending from said annular wall (82) and towards the mating face (12) and a longitudinally divided part (90) extending from said solid part (88) up to said mating face (12) and defining a pair of opposite latch arms (109), each formed with first and second external, circumferentially spaced, latching notches (108 and 108′), the annular wall (82) and said solid part (88) being formed with a longitudinally indented keying surface (96), the terminal retainer comprising a pair of internally projecting latching spurs (120) each for latchingly engaging in a respective first notch (108) in the first angular position of the terminal retainer (4) and in a respective second notch (108′) in the second angular position of the terminal retainer (4), and a resilient key (122) for engaging in slots (92) of said longitudinally divided part (90), and in said keying surface (96).
- A housing according to claim 1, 2 or 3,
characterized in that the spigot (146) is tubular and is of constant circular cross section, the terminal retainer (142) having a constant circular cross section bore (168) for receiving the spigot (146). - A housing according to claim 8,
characterized in that the terminal retainer (142) has a pair of diametrically opposed, radially outwardly projecting, latching spurs (182), the housing (140) being formed between the cavities (8 or 8a) thereof with circumferentially spaced latching notches (158 and 158′) for receiving a latching tip (184) of one of the latching spurs (182) in the first and second angular positions, respectively, of the terminal retainer (142). - A housing according to claim 9,
characterized in that the housing (140) defines between each pair of adjacent cavities (8a), a well (156) opening into a mating face (12a) of the housing (140), for receiving a respective terminal retaining member (172) of the terminal retainer (142), each well (156) communicating, proximate to a mating face (12a) of the housing (140) with the first and second latching notches (158 and 158′) extending radially outwardly from the well (156), each for receiving in the first and second angular positions, respectively, of the terminal retainer (142), a latching tip (184) of a latching spur (182) projecting radially outwardly from the terminal retainer (142).
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
GB8920154 | 1989-09-06 | ||
GB898920154A GB8920154D0 (en) | 1989-09-06 | 1989-09-06 | Electrical connector housing |
Publications (2)
Publication Number | Publication Date |
---|---|
EP0416623A1 EP0416623A1 (en) | 1991-03-13 |
EP0416623B1 true EP0416623B1 (en) | 1994-08-10 |
Family
ID=10662627
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP19900117195 Expired - Lifetime EP0416623B1 (en) | 1989-09-06 | 1990-09-06 | Electrical connector housing |
Country Status (5)
Country | Link |
---|---|
EP (1) | EP0416623B1 (en) |
JP (1) | JP3017519B2 (en) |
DE (1) | DE69011441T2 (en) |
ES (1) | ES2057301T3 (en) |
GB (1) | GB8920154D0 (en) |
Families Citing this family (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
FR2729794A1 (en) * | 1995-01-19 | 1996-07-26 | Cinch Connecteurs Sa | Locking assembly for electrical connector |
Family Cites Families (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US3573720A (en) * | 1969-01-07 | 1971-04-06 | Amp Inc | Electrical connector |
CH607363A5 (en) * | 1975-12-23 | 1978-12-15 | Wolf Friedrich Kg | Easily mounted electrical socket |
DE8508465U1 (en) * | 1985-03-21 | 1986-01-09 | Amp Deutschland Gmbh, 6070 Langen | Connector with a rotatable insert to hold connections in place |
-
1989
- 1989-09-06 GB GB898920154A patent/GB8920154D0/en active Pending
-
1990
- 1990-09-06 EP EP19900117195 patent/EP0416623B1/en not_active Expired - Lifetime
- 1990-09-06 JP JP2236935A patent/JP3017519B2/en not_active Expired - Lifetime
- 1990-09-06 DE DE1990611441 patent/DE69011441T2/en not_active Expired - Lifetime
- 1990-09-06 ES ES90117195T patent/ES2057301T3/en not_active Expired - Lifetime
Also Published As
Publication number | Publication date |
---|---|
JPH03119671A (en) | 1991-05-22 |
JP3017519B2 (en) | 2000-03-13 |
ES2057301T3 (en) | 1994-10-16 |
EP0416623A1 (en) | 1991-03-13 |
GB8920154D0 (en) | 1989-10-18 |
DE69011441T2 (en) | 1994-12-08 |
DE69011441D1 (en) | 1994-09-15 |
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