GB2134965A - Quarter turn fastener - Google Patents
Quarter turn fastener Download PDFInfo
- Publication number
- GB2134965A GB2134965A GB08333482A GB8333482A GB2134965A GB 2134965 A GB2134965 A GB 2134965A GB 08333482 A GB08333482 A GB 08333482A GB 8333482 A GB8333482 A GB 8333482A GB 2134965 A GB2134965 A GB 2134965A
- Authority
- GB
- United Kingdom
- Prior art keywords
- stud
- retainer
- pair
- engaging
- aperture
- 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.)
- Granted
Links
- 230000000295 complement effect Effects 0.000 claims abstract description 15
- 230000015572 biosynthetic process Effects 0.000 claims abstract description 8
- 238000005755 formation reaction Methods 0.000 claims abstract description 8
- 230000000717 retained effect Effects 0.000 claims abstract description 4
- 210000002105 tongue Anatomy 0.000 claims description 14
- 101100327917 Caenorhabditis elegans chup-1 gene Proteins 0.000 description 2
- 238000001125 extrusion Methods 0.000 description 2
- 239000000463 material Substances 0.000 description 2
- 239000002184 metal Substances 0.000 description 2
- 229920003023 plastic Polymers 0.000 description 2
- 239000004033 plastic Substances 0.000 description 2
- 101100441413 Caenorhabditis elegans cup-15 gene Proteins 0.000 description 1
- 238000000034 method Methods 0.000 description 1
Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16B—DEVICES FOR FASTENING OR SECURING CONSTRUCTIONAL ELEMENTS OR MACHINE PARTS TOGETHER, e.g. NAILS, BOLTS, CIRCLIPS, CLAMPS, CLIPS OR WEDGES; JOINTS OR JOINTING
- F16B21/00—Means for preventing relative axial movement of a pin, spigot, shaft or the like and a member surrounding it; Stud-and-socket releasable fastenings
- F16B21/02—Releasable fastening devices locking by rotation
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16B—DEVICES FOR FASTENING OR SECURING CONSTRUCTIONAL ELEMENTS OR MACHINE PARTS TOGETHER, e.g. NAILS, BOLTS, CIRCLIPS, CLAMPS, CLIPS OR WEDGES; JOINTS OR JOINTING
- F16B21/00—Means for preventing relative axial movement of a pin, spigot, shaft or the like and a member surrounding it; Stud-and-socket releasable fastenings
- F16B21/10—Means for preventing relative axial movement of a pin, spigot, shaft or the like and a member surrounding it; Stud-and-socket releasable fastenings by separate parts
- F16B21/16—Means for preventing relative axial movement of a pin, spigot, shaft or the like and a member surrounding it; Stud-and-socket releasable fastenings by separate parts with grooves or notches in the pin or shaft
Landscapes
- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Snaps, Bayonet Connections, Set Pins, And Snap Rings (AREA)
Abstract
The fastener has a stud (10) which is mounted on a first member by means of a retainer (14) located in an aperture in the first member. The retainer comprises a substantially annular cup (15) and a pair of depending opposed legs (18) each having an outwardly extending foot (19). The legs (18) extend through the aperture in the first member so that the retainer is held in the aperture by means of feet (19) engaging one side and by one or more shoulders (20) engaging the other side. The stud has a head (2) for engagement by a suitable tool for rotating the stud and the head is retained in the retainer cup (15) as a snap fit by means of a radially inwardly extending lip (22). Complementary abutments (7, 17) are provided positioned to constrain rotation of the stud to a quarter of a turn within the retainer and complementary formations (10, 11, 25) are provided to form detents so as to maintain the two extreme rotational positions of the stud within the retainer. <IMAGE>
Description
SPECIFICATION
Quarter-turn fastener
The present invention relates to quarter-turn
fasteners for fastening a first member to a second
member by means of a stud fastener mounted on
the first member and engaging rotatably either
directly or indirectly with the second member.
Many such fasteners are known, engaging
either directly with the second member, for
example, by means of a pawl, cross-bar or the like
engaging in a non-circular aperture in the second
member, or indirectly, for example, by means of suitable cam forms engaging with tabs or the like
in a receptacle mounted on the second member.
There are many such possible combinations. In particular, to simplify assembly, it has been
known to mount the stud through an aperture in the first member by means of a retainer which comprises a substantially annular cup and a pair of depending opposed legs each having an outwardly extending foot, in use the legs extending through the aperture and the retainer being held in the aperture by the feet engaging one side of the member and by one or more shoulders on the retainer engaging the other side of the member. When such a retainer is formed of resilient plastics material then the legs can be snap-fitted through the aperture and, thereafter, the stud inserted, also as a snap fit, within the retainer. This is preferably achieved by the head of the stud being retained in the retainer cup by means of a radially inwardly extending lip on the cup.
One particular problem which has arisen with such fasteners relates to the rotational position of the stud during fastening of the first, or supported, member to the second, or supporting member, when a plurality of such fasteners are used. It will be appreciated that the stud can be rotated into such a position that it needs to be further rotated before its pawl, cross-bar, cam forms or the like can engage with the corresponding formation on or mounted on the second member.
In order to help overcome this problem and in accordance with the present invention, a quarterturn fastener for fastening a first member to a second member by means of a stud of the fastener mounted on the first member and engaging rotatably either directly or indirectly with the second member to fastener the members, the fastener including a retainer for mounting the stud through an aperture in the first member, the retainer comprising a substantially annular cup and a pair of depending opposed legs each having an outwardly extending foot, in use the legs extending through the aperture so that the retainer is held in the aperture by the feet engaging one side and one or more shoulders engaging the other side, the stud having a head for engagement by a suitable tool for rotation and the head being retained in the retainer cup as a snap fit by means of a radially inwardly extending lip on the cup, is characterized in that complementary abutments are provided positioned to constrain rotation of the stud to a quarter of a turn within the retainer and complementary formations are provided to form detents so as to maintain the two extreme rotational positions of the stud within the retainer.
The complementary abutments and formations may comprise any one of several possible forms, but in a preferred embodiment the retainer has a bore intermediate the cup and legs, the bore being non-circular in cross-section and having a pair of substantially parallel opposed sides and the stud has a cross-section at a complementary position which is substantially lozenge-shaped providing two pairs of stop surfaces substantially perpendicular to one another, each one of each pair of stop surfaces engaging with the sides of the bore in the retainer at one of the end positions of a quarter turn, to constrain the stud from rotating further.Detents may be formed either by further complementary formations on the retainer engaging with the corners of the lozenge-shaped portion of the stud or, alternatively, by means of shallow protrusions on the stud formed at 900 positions around the axis of the stud, and a pair of complementary recesses formed in the opposed side walls of the bore in the retainer, whereby each pair of opposed protrusions engages with the recesses when the stud is in one of the two extreme rotational positions.
Alternatively, the stud may include a pair of radially extending tongues formed on the underside of the head, each of the tongues moving, during rotation of the stud, in a partannular groove, the ends of the grooves forming stops to limit the rotation of the stud to a quarter of a turn, each of the grooves having an inward projection spaced from the end of the groove by substantially the width of the tongues thereby forming, with the tongues, two pairs of detents so as to hold the stud in two extreme rotational positions defined by the end abutments of the grooves.
Two examples of a fastener constructed in accordance with the present invention will now be described with reference to the accompanying drawings in which Figure 1 comprises an axial part-section of a first example;
Figure 2 is a section on the line Il-Il in Figure 1;
Figure 3 is a view on arrow A in Figure 1, but with the head removed for clarity;
Figure 4 is a side view of the fastener shown in assembled condition;
Figure 5 is an axial part-section of a second example; and,
Figure 6 is a cross-section of Vl-Vl in Figure 5.
The fastener shown in Figures 1 and 2 comprises a stud 1 having a head 2 a shank 3, a pair of radially outwardly extending pawls 4 and a tapered nose 5. The underside of the head 2 has a frusto-conical face 2' and an annular groove 6 is formed immediately adjacent the surface 2'.
Adjacent the groove 6 the shank 3 of the stud has a generally lozenge-shaped cross-section thus providing a pair of protrussions 7 which extend radially outwardly beyond the cylindrical periphery of the shank 3. Each of the protrusions 7 forms one of each of two pairs of stop surfaces 8, 9. At the junction between the protrusions 7 and the shank 3 two pairs of diametrically oppositely positioned rib-like protrusions 10, 11 are formed.
Adjacent the pawls 4 the shank 3 has a further generally lozenge-shaped cross-section providing a pair of protrusions 27 which extend radially outwardly beyond the cylindrical periphery of the shank 3. Each of the protrusions 27 forms one of each of two pairs of stop surfaces 28, 29.
To mount the stud 1 in an aperture 12 in a member 13, a retainer 14, of resilient plastics material, is provided, the retainer having an annular cup 15, a non-circular bore 1 6 having a pair of opposed substantially parallel sides 17, and a pair of depending legs 18, at the free ends of which are provided feet 19. The legs 18 and feet 1 9 are of considerably lesser width than the overall diameter of the retainer 14 as can be seen from Figure 2 so that shoulders 20 are effectively formed on either side of the legs and so that the member 13 can be held between the feet 19 and the shoulders 20 after snap fitting of the feet through the aperture 12.
The inner face 21 of each leg is generally nonparallel with the outer surface of the leg so as to enable snap-fitting of the retainer into the aperture whilst the stud is held within the retainer.
In use the stud is first inserted through the cup 1 5 and bore 16 and a lip 22 on the cup 1 5 retains the stud within the retainer. A compliant O-ring 23 provides resilience and allows the fastener to be used with support members 24 of different dimensions. For the purposes of clarity the first and second members 13,24, are not shown in
Figures 1,2 and 3.
It will be appreciated that in one extreme rotational position of the stud 3 the abutment surfaces 8 engage the sides 1 7 of the bore 1 6 and it can be seen that the ribs 10 engage in recesses 25 formed in the side walls 1 7 to act at detents. On rotation of the stud anti-clockwise as seen in Figures 2 and 3 the surfaces 9 come into engagement with the side walls 1 7 and at the same time the ribs 11 engage in the recesses 25 again to act as detents.
In use, in this example, with the stud 3 rotated anti-clockwise to a position within the retainer 14 at 900 to that shown in Figures 2 and 3 (the pawls 4 being aligned with the retainer legs 18), the panel 13 can be presented to the support member 24 which in this case comprises a metal extrusion with a slot 30 having a varying width across its depth, the slot 30 extending the length of the extrusion. Pairs of shoulders 31, 32, 33 and 34 define slot portions 35, 36, 37 and 38 of different sizes for purposes that will now be described. When the stud is in the position shown in Figures 2 and 3 the pawls 4 are able to pass through the portions 35 of the slot 30, thus allowing the panel member 13 to be abutted against the shoulders 34 and thus fitted to the front of the support member 24.Rotating the stud then locks the panel member to the support. A plurality of the support members may be provided to form a frame opening for example, to which the panel member 13 may may as a cover.
A metal strip 39 which has a plurality of closely spaced openings 40 through it resides in the portion 37 of the slot, the openings 40 defining a plurality of positions for location of the stud 3 of the fastener, by means of the nose 5 engaging in one of the openings 40. After the stud has been inserted into the slot 30 it can be rotated so that the pawls 4 engage the shoulders 33 to lock the panel to the support member The portion 36 of the slot obviously has a width slightly greater than the overall width of the two pawls 4 to enable their rotation into the position shown in Figure 4.
The stop surfaces 28 and 29 assist in preventing too great an over-rotation of the stud by engaging the sidewalls of the slot portion 35 if the stud is over rotated the extent that the inherent flexibility of the retainer 14 allows the stud to over-rotate slightly after engagement of the abutments 7 with the sides 1 7 of the retainer.
This is particularly useful when the panel hole is small in which case the cup legs may be very thin, so that the additional stops provided by the abutments 28 and 29 act to provide additional "overload" torque resistance.
By providing the complementary abutments and detent formations the rotational position of the stud within the retainer can be positively assured so that, for example, further security against unlocking can be provided when the stud is in the fastened position and, similarly, it can be ensured that the stud is in a position in which it
can be correctly aligned with the opening 26 in the member 24 to ensure that fastening can take place.
Although the first example has been shown
with a tapered nose 5 for engagement with the openings 40 in the strip 39, it will be appreciated
that this nose can be dispensed with altogether
if it is desired that the position of the fastener be variable along the slot 30 or, in cases where the
position of the fastener is well defined and instead
of an elongate slot 30 there is a conventional
closed-shape aperture in the support member.
A similar type of fastener is shown in Figures 5
and 6. The fastener is shown without the
members to which it would normally be attached
as the principle of attachment is clear from Figure
4.
This particular example does not include an 0
ring such as shown in Figure 1, but it will be
appreciated that one can be provided if required
for a specific use. The head 102 of the stud 101
has, at its underside, a pair of generally radially
extending tongues 127. The complementary
retainer 114 has a pair of part-annular grooves 1 28 along which the tongues 127 can move
during rotation of the stud within the retainer
114. The ends 129 of the grooves 128 are formed so as to engage against the tongues 127
when the stud is in one of two rotational positions which are substantially 900 apart. Each of the grooves 128 also has a pair of inwardly directed protrusions 1 30 which define detent recesses 1 31 at either end of the groove. When the tongues 1 27 are within the detent recesses 131 the protrusions 1 30 retain the tongues therein thus fixing the stud in one of the two rotational positions until it is rotated and the flexibility of the wall of the retainer 114 allows the tongues 127 to move over the protrusions into the new position. Thus, the method of operation of the fastener is substantially the same as that of the first example in so far as the movement between the fastening and releasing positions of the stud is concerned.
Claims (7)
1. A quarter-turn fastener for fastening a first member to a second member by means of a stud of the fastener mounted on the first member and engaging rotatably either directly or indirectly with the second member to fasten the members, the fastener including a retainer for mounting the stud through an aperture in the first member, the retainer comprising a substantially annular cup and a pair of depending opposed legs each having an outwardly extending foot in use the legs extending through the aperture so that the retainer is held in the aperture by the feet engaging one side and one or more shoulders engaging the other side, the stud having a head for engagement by a suitable tool for rotation and the head being retained in the retainer cup as a snap fit by means of a radially inwardly extending lip on the cup, characterized in that complementary abutments are provided positioned to constrain rotation of the stud to a quarter of a turn within the retainer and complementary formations are provided to form detents so as to maintain the two extreme rotational positions of the stud within the retainer.
2. A fastener according to claim 1, wherein the retainer has a bore intermediate the cup and legs, the bore being non-circular in cross-section and having a pair of substantially parallel opposed sides and wherein the stud has a cross-section at a complementary position which is substantially lozenge-shaped providing two pairs of stop surfaces substantially perpendicular to one another, each one of each pair of stop surfaces engaging with the sides of the bore in the retainer at one of the end positions of a quarter turn, to constrain the stud from rotating further.
3. A fastener according to claim 2, wherein the detents comprise complementary formations on the retainer engaging with the corners of the lozenge-shaped portion of the stud.
4. A fastener according to claims 1 or claim 2, wherein the detents comprise shallow protrusions on the stud formed at 900 positions around the axis of the stud, and a pair of complementary recesses formed in the opposed side walls of the bore in the retainer, whereby one pair of opposed protrusions engages with the recesses when the stud is in one of the two extreme rotational positions and the other pair when the stud is in the other of the positions.
5. A fastener according to claim 2, including a further pair of abutments having stop surfaces adapted to engage the sides of the aperture in the second member into which the stud passes.
6. A fastener according to claim 1, wherein the stud includes a pair of radially extending tongues formed on the underside of the head each of the tongues moving, during rotation of the stud, in a part-annular groove the ends of the grooves forming stops to limit the rotation of the stud to a quarter of a turn, and each of the grooves having an inward projection spaced from the end of the groove by substantially the width of the tongues, thereby forming, with the tongues two pairs of detents so as to hold the stud in two extreme rotational positions defined by the end abutments of the grooves.
7. A fastener according to claim 1, substantially as described with reference to any of the accompanying drawings.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| GB08333482A GB2134965B (en) | 1983-01-24 | 1983-12-15 | Quarter-turn fastener |
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| GB838301909A GB8301909D0 (en) | 1983-01-24 | 1983-01-24 | Quarter-turn fastener |
| GB08333482A GB2134965B (en) | 1983-01-24 | 1983-12-15 | Quarter-turn fastener |
Publications (3)
| Publication Number | Publication Date |
|---|---|
| GB8333482D0 GB8333482D0 (en) | 1984-01-25 |
| GB2134965A true GB2134965A (en) | 1984-08-22 |
| GB2134965B GB2134965B (en) | 1986-06-04 |
Family
ID=26285007
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| GB08333482A Expired GB2134965B (en) | 1983-01-24 | 1983-12-15 | Quarter-turn fastener |
Country Status (1)
| Country | Link |
|---|---|
| GB (1) | GB2134965B (en) |
Cited By (12)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB2147940A (en) * | 1983-10-13 | 1985-05-22 | Massey Ferguson Mfg | Fastening devices |
| GB2186906A (en) * | 1986-03-10 | 1987-08-26 | Burn Tubes Ltd | Securing means |
| EP0269497A1 (en) * | 1986-11-04 | 1988-06-01 | Philippe Wolf | Reinforcement of supporting structure elements by inserting highly resistant plates |
| US4762437A (en) * | 1986-03-31 | 1988-08-09 | Nifco Inc. | Fastener |
| US4848956A (en) * | 1986-02-21 | 1989-07-18 | Burn Tubes Limited | Securing means |
| WO1990015698A1 (en) * | 1989-06-16 | 1990-12-27 | Joachim Buschulte | Device for the releasable connection of gripping components or corresponding tools on robot arms |
| EP0428798A1 (en) * | 1989-11-21 | 1991-05-29 | Click Connections Corporation | Connector |
| WO1993014324A1 (en) * | 1992-01-17 | 1993-07-22 | Dzus Fastener Europe Limited | Quick release stud fastener |
| US5253948A (en) * | 1988-07-22 | 1993-10-19 | Butler Peter R | Connector for releasably connecting and locking a first member to a second member |
| WO2013030336A1 (en) * | 2011-09-01 | 2013-03-07 | Afe Metal | Mechanical system comprising a device for connection between a wearing part and the support thereof, heavy-construction machine bucket, and method for implementing said system |
| WO2013030335A1 (en) * | 2011-09-01 | 2013-03-07 | Afe Metal | Mechanical system comprising a device for connection between a wearing part and the support thereof, heavy-construction machine bucket, and method for implementing said system |
| WO2015040101A1 (en) * | 2013-09-20 | 2015-03-26 | Safe Metal | Mechanical system comprising a connecting device between a wearing part and the support thereof, and bucket of a heavy-construction machine |
-
1983
- 1983-12-15 GB GB08333482A patent/GB2134965B/en not_active Expired
Cited By (26)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB2147940A (en) * | 1983-10-13 | 1985-05-22 | Massey Ferguson Mfg | Fastening devices |
| US4848956A (en) * | 1986-02-21 | 1989-07-18 | Burn Tubes Limited | Securing means |
| GB2186906A (en) * | 1986-03-10 | 1987-08-26 | Burn Tubes Ltd | Securing means |
| GB2186906B (en) * | 1986-03-10 | 1989-11-22 | Burn Tubes Ltd | Securing means |
| US4762437A (en) * | 1986-03-31 | 1988-08-09 | Nifco Inc. | Fastener |
| EP0269497A1 (en) * | 1986-11-04 | 1988-06-01 | Philippe Wolf | Reinforcement of supporting structure elements by inserting highly resistant plates |
| US5253948A (en) * | 1988-07-22 | 1993-10-19 | Butler Peter R | Connector for releasably connecting and locking a first member to a second member |
| WO1990015698A1 (en) * | 1989-06-16 | 1990-12-27 | Joachim Buschulte | Device for the releasable connection of gripping components or corresponding tools on robot arms |
| EP0428798A1 (en) * | 1989-11-21 | 1991-05-29 | Click Connections Corporation | Connector |
| WO1993014324A1 (en) * | 1992-01-17 | 1993-07-22 | Dzus Fastener Europe Limited | Quick release stud fastener |
| FR2979647A1 (en) * | 2011-09-01 | 2013-03-08 | Afe Metal | MECHANICAL SYSTEM COMPRISING A DEVICE FOR CONNECTION BETWEEN A WEAR PIECE AND ITS SUPPORT, PUBLIC WORKS MACHINE BUCKET AND METHOD OF IMPLEMENTING SUCH A SYSTEM |
| US9145662B2 (en) | 2011-09-01 | 2015-09-29 | Safe Metal | Mechanical system comprising a device for connection between a wearing part and the support thereof, heavy-construction machine bucket, and method for implementing said system |
| WO2013030336A1 (en) * | 2011-09-01 | 2013-03-07 | Afe Metal | Mechanical system comprising a device for connection between a wearing part and the support thereof, heavy-construction machine bucket, and method for implementing said system |
| FR2979648A1 (en) * | 2011-09-01 | 2013-03-08 | Afe Metal | MECHANICAL SYSTEM COMPRISING A DEVICE FOR CONNECTION BETWEEN A WEAR PIECE AND ITS SUPPORT, PUBLIC WORKS MACHINE BUCKET AND METHOD OF IMPLEMENTING SUCH A SYSTEM |
| WO2013030335A1 (en) * | 2011-09-01 | 2013-03-07 | Afe Metal | Mechanical system comprising a device for connection between a wearing part and the support thereof, heavy-construction machine bucket, and method for implementing said system |
| US9234332B2 (en) | 2011-09-01 | 2016-01-12 | Safe Metal | Mechanical system for connecting a wearing part and a support thereof, and method for implementing said system |
| WO2015040101A1 (en) * | 2013-09-20 | 2015-03-26 | Safe Metal | Mechanical system comprising a connecting device between a wearing part and the support thereof, and bucket of a heavy-construction machine |
| FR3011013A1 (en) * | 2013-09-20 | 2015-03-27 | Safe Metal | MECHANICAL SYSTEM COMPRISING A DEVICE FOR CONNECTION BETWEEN A WEAR PIECE AND ITS SUPPORT, AND PUBLIC WORKS MACHINE BUCKET |
| KR20160056894A (en) * | 2013-09-20 | 2016-05-20 | 사페 메탈 | Mechanical system comprising a connecting device between a wearing part and the support thereof, and bucket of a heavy-construction machine |
| CN105723034A (en) * | 2013-09-20 | 2016-06-29 | 萨弗金属公司 | Mechanical system comprising a connecting device between a wearing part and the support thereof, and bucket of a heavy-construction machine |
| JP2016530420A (en) * | 2013-09-20 | 2016-09-29 | セーフ・メタル | Mechanical system with coupling device between wear part and its support, and bucket for heavy construction machinery |
| AU2014323143B2 (en) * | 2013-09-20 | 2017-11-30 | Safe Metal | Mechanical system comprising a connecting device between a wearing part and the support thereof, and bucket of a heavy-construction machine |
| US9920503B2 (en) | 2013-09-20 | 2018-03-20 | Safe Metal | Mechanical system comprising a connecting device between a wearing part and the support thereof, and bucket of a heavy construction machine |
| RU2667173C2 (en) * | 2013-09-20 | 2018-09-17 | Сейф Метал | Mechanical system containing coupling device between wearing part and its holder and bucket of construction machine |
| CN105723034B (en) * | 2013-09-20 | 2018-12-18 | 萨弗金属公司 | The scraper bowl of mechanical system and heavy construction engineering machinery including the attachment device between wearing terrain and its supporter |
| KR102246372B1 (en) | 2013-09-20 | 2021-04-29 | 사페 메탈 | Mechanical system comprising a connecting device between a wearing part and the support thereof, and bucket of a heavy-construction machine |
Also Published As
| Publication number | Publication date |
|---|---|
| GB2134965B (en) | 1986-06-04 |
| GB8333482D0 (en) | 1984-01-25 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| 732 | Registration of transactions, instruments or events in the register (sect. 32/1977) | ||
| PCNP | Patent ceased through non-payment of renewal fee |
Effective date: 19941215 |