CA1050310A - Plastic screw grommet - Google Patents
Plastic screw grommetInfo
- Publication number
- CA1050310A CA1050310A CA252,900A CA252900A CA1050310A CA 1050310 A CA1050310 A CA 1050310A CA 252900 A CA252900 A CA 252900A CA 1050310 A CA1050310 A CA 1050310A
- Authority
- CA
- Canada
- Prior art keywords
- sleeve
- grommet
- diametrically opposed
- plastic screw
- shoulder
- 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
Links
- 229920003023 plastic Polymers 0.000 title claims abstract description 23
- 239000004033 plastic Substances 0.000 title claims abstract description 23
- 238000010079 rubber tapping Methods 0.000 claims abstract description 10
- 238000005187 foaming Methods 0.000 claims description 6
- 239000006260 foam Substances 0.000 claims description 3
- 239000000463 material Substances 0.000 claims description 3
- 238000013459 approach Methods 0.000 claims description 2
- 229920005830 Polyurethane Foam Polymers 0.000 description 3
- 239000011496 polyurethane foam Substances 0.000 description 3
- 229920002635 polyurethane Polymers 0.000 description 2
- 239000004814 polyurethane Substances 0.000 description 2
- 239000011796 hollow space material Substances 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- 230000035515 penetration Effects 0.000 description 1
- 229920000136 polysorbate Polymers 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
- F16B19/00—Bolts without screw-thread; Pins, including deformable elements; Rivets
- F16B19/04—Rivets; Spigots or the like fastened by riveting
- F16B19/08—Hollow rivets; Multi-part rivets
- F16B19/10—Hollow rivets; Multi-part rivets fastened by expanding mechanically
- F16B19/1027—Multi-part rivets
- F16B19/1036—Blind rivets
- F16B19/1081—Blind rivets fastened by a drive-pin
-
- 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
- F16B37/00—Nuts or like thread-engaging members
- F16B37/04—Devices for fastening nuts to surfaces, e.g. sheets, plates
- F16B37/041—Releasable devices
- F16B37/043—Releasable devices with snap action
Landscapes
- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Dowels (AREA)
- Insertion Pins And Rivets (AREA)
- Connection Of Plates (AREA)
Abstract
ABSTRACT
A plastic screw grommet provided with a through hole and extending at one end in a sleeve which is connected to the remain-der portion of the grommet through a thin section frangible upon a blow struck on the sleeve and designed to receive a self-tapping screw, said grommet being provided at the front face intended to abut the wall to which the grommet is secured, with a flange and internally with at least a frustoconical surface connected to said flange with tapering directed against said flange.
A plastic screw grommet provided with a through hole and extending at one end in a sleeve which is connected to the remain-der portion of the grommet through a thin section frangible upon a blow struck on the sleeve and designed to receive a self-tapping screw, said grommet being provided at the front face intended to abut the wall to which the grommet is secured, with a flange and internally with at least a frustoconical surface connected to said flange with tapering directed against said flange.
Description
10503~Lo PLASTIC SCl~W GRG~F~
.
This invention relates to a plastic screw grom~et intended to act as an insert for a self-tapping screw.
In certain application where it is necessary -to secure a ¦screw to a thin wall, generally of sheet metal, it is necessary to provide a support for the screw, because the en~agement a~o~e ¦of the screw with corresponding threads provided in a sheet hole ¦in which the screw is positioned would not be sufficient to pre-¦vent a loosening or vibration of the screw. Such applications ¦occux for example in refrigerator cabinets in which such screws ¦can be required for fastening various internal components of the refrigerator cabinet. In these applications there is also the problem of providin~ a seal for the polyurethane ~oam during the foaming operation necessary for filling with polyurethane foam the hollow space between the walls of the cabinet. ~nother ex~mp e of application occurs in the case of car body parts where there i also the need to provide, by means of screws inserted into the sheet, fastening locations of different devices to the body and simultaneously to coat with polyurethane foam portions of the bod .
Solutions to these problems have been already proposed, but they were elaborated and expensive~
~he object of this invention is to solve the above problems in a simpler and more economical manner.
The object.is attained by the invention which contemplates a plastic screw grommet that nas a through hole that extends at one end in a sleeve. The sleeve is connected to the remainder ~IL()503~0 portion of the grommet through a thin section, with the thin section being frangible upon a blow struck on the sleeve. The sleeve is designed to receive a self-tapping screw, and the grommet is provided with a flange at the one end intended to abut the wall into which the grommet is secured. The grommet externally has a pair of opposite frustoconical surfaces connected to the flange with a reducing taper as the grommet external surface approaches the flange, and the sleeve is provided inside with a diaphragm for preventing the outflow of any foam or other foaming material through the sleeve hole from the apparatus to whicll the grommet is applied.
By means of this arrangement, if measures have been taken to shape the frustoconical surface in such a manner that, once a screw is introduced in a suitable hole provided in the wa11 to which it is to be fastened, the hole wall presses on the grommet thereby reducing the diameter of the through hole thereof, a blow struck on the sleeve causes the fracture of the thin section connecting the sleeve to the remainder of the grommet and the penetration of the sleeve into the grommet with the grommet being locked against the wall, because the sleeve tends to expand the grommet compressed by the wall hole. In this position the sleeve is ready to receive the self-tapping screw.
According to a feature of the invention the sleeve is internally provided with a diaphragm for preventing the polyurethane foam or other similar foaming material of the apparatus to which said grommet is applied to fall out of the sleeve hole during the foaming operation.
According to another feature of the invention the sleeve is provided at both ends with a pair of shoulders for engagement with - ~05~3~
a front wall of the grommet ~nd the flange of the grommet arrarl-ged at the other front wall of the grommet as the sleeve is insert _ ed into the grommet.
The above and other features will be apparent from the follo~ _ ing detsiled description merely given by wa~ of example and there-fore not intended in a limiting sense, of an embodiment of the invention in connection with the accompanying drawing, wherein:
Fig. 1 is an elevation view of a screw grommet according to the invention before it is applied to a wall; .
~lg. 2 is a sectional view taken along the line 2-2 of Fig~ ;
Fig 3 is a front view of the screw grommet of Figs. 1 and 2 looking in the direction of arrow 3 of these figures;
Fig. 4 is a fragmentary view taken along the line 4-4 of Fig 3, appearing with Fig. 1; and ~ ig. 5 is a fragmentary front view of the screw grommet look-. ing in the direction of arrow 5 of Fig. 1 once a screw shank isinstroduced into the grommet, appearing with Fig. 1.
Referring to the ~igures of the drawing, there is seen. that the screw grommet 1 is provlded with a through hole 2 and a pair of outer frustoconical surfaces 3 and 4.
The hole 2 is square in cross-section with a recess 5 at the four corners in order to make the screw grommet flexible. The screw grommet is provided also at one of the fron-t faces thereof with a flan~e 6 which extends from this flange in a sleeve 7 whic~
`) is9luare in cross-section, having a-t the free end a hole 8 separa-1050310ted b~ means of a diaphragm 9 from a cavity 10 of trapezoidal shaI e the function of which is to make the sleeve 7 resilient. q'he lst-ker is connected to t~e remainder of the screw grommet by means of a pair of frangible -thin sections 11 and is provided in . dia-metrically opposed locations with a pair of projections 12. At the free end the sleeve 7 is provided with a pair of ~u~s 1~ dia~
metrically opposed and oriented with an angle of 90 degrees to the pro~ections 12~ In the ~lange 6 of the screw grommet 1 a pair of grooves 14 are provided in diametrically opposed locations, said grooves being designed to receive the lugs 13 as will be discussed hereinafter.
Assuming the screw grommet is to be secured to a wall 15 (se~
~ig. 2)~ the screw grommet is introduced into the hole 16 suitabl~
provided in the wall by taking advantage of the resiliency impar-ted to the screw ~rommet by the presence of the recesses 5 pro-vided at the four corners ol the hole 2. The screw grommet is thereby compressed on its frùstoconical surface 4 as a result of the engagement of this surface with the hole wall 16. At thi.s point a blow is struck on the end of the sleeve 7 so as to break the sections 11 connecting the sleeve to the screw grommet 1 and to cause the sleeve to penetrate the hole 2 and slide therein until the projections 12, which have entered the hole 2 as a re~
sult ol the resiliency imparted to the sleeve by the recesses 5, come out of the hole 2 and due to the resiliency take again their _ 4 _ ~6~5~313~G~
¦non compressed condition wherein the projec-tions engage the front ¦surface of the screw grommet 1O At the same time the lugs 13 eng . Ige in the grooves 14 of the f~ange 6 50 that the sleeve 7 is axial -ly adjusted with respect to the screw grommet~
¦ As the sleeve 7 has entered inside the screw grommet 1, the ¦sleeve expands the screw grommet which was compressed by the hole ¦wall 16 causing thereby the screw grommet to be locked within the hole~
¦ It is seen that the diaphragm 9 prevents the polyurethane ¦foam to ~all out of the inside of the wall 15 during the foaming . ¦operation which is necessary in apparatus or parts (for example ¦parts of a car body) -to which the screw grommet is being applied ¦ As the foamin~ operation is finished the screw grommet is ¦ready to receive a self-tapping screw, not shown, which is intro-¦ duced into the wall of the sleeve 7 by cutting therein the threadc J necessary to the engagement be-tween screw and grommet. Due to the square shape of the hole 2 and the sleeve 7~ the screw grommet cannot rotate as the screw is being tightened.
I While an embodiment only of the invention has been described ~ and illustrated it is obvious that various changes and modifica-¦tions can be made thereto without departing from the scope of the ¦invention.
.
This invention relates to a plastic screw grom~et intended to act as an insert for a self-tapping screw.
In certain application where it is necessary -to secure a ¦screw to a thin wall, generally of sheet metal, it is necessary to provide a support for the screw, because the en~agement a~o~e ¦of the screw with corresponding threads provided in a sheet hole ¦in which the screw is positioned would not be sufficient to pre-¦vent a loosening or vibration of the screw. Such applications ¦occux for example in refrigerator cabinets in which such screws ¦can be required for fastening various internal components of the refrigerator cabinet. In these applications there is also the problem of providin~ a seal for the polyurethane ~oam during the foaming operation necessary for filling with polyurethane foam the hollow space between the walls of the cabinet. ~nother ex~mp e of application occurs in the case of car body parts where there i also the need to provide, by means of screws inserted into the sheet, fastening locations of different devices to the body and simultaneously to coat with polyurethane foam portions of the bod .
Solutions to these problems have been already proposed, but they were elaborated and expensive~
~he object of this invention is to solve the above problems in a simpler and more economical manner.
The object.is attained by the invention which contemplates a plastic screw grommet that nas a through hole that extends at one end in a sleeve. The sleeve is connected to the remainder ~IL()503~0 portion of the grommet through a thin section, with the thin section being frangible upon a blow struck on the sleeve. The sleeve is designed to receive a self-tapping screw, and the grommet is provided with a flange at the one end intended to abut the wall into which the grommet is secured. The grommet externally has a pair of opposite frustoconical surfaces connected to the flange with a reducing taper as the grommet external surface approaches the flange, and the sleeve is provided inside with a diaphragm for preventing the outflow of any foam or other foaming material through the sleeve hole from the apparatus to whicll the grommet is applied.
By means of this arrangement, if measures have been taken to shape the frustoconical surface in such a manner that, once a screw is introduced in a suitable hole provided in the wa11 to which it is to be fastened, the hole wall presses on the grommet thereby reducing the diameter of the through hole thereof, a blow struck on the sleeve causes the fracture of the thin section connecting the sleeve to the remainder of the grommet and the penetration of the sleeve into the grommet with the grommet being locked against the wall, because the sleeve tends to expand the grommet compressed by the wall hole. In this position the sleeve is ready to receive the self-tapping screw.
According to a feature of the invention the sleeve is internally provided with a diaphragm for preventing the polyurethane foam or other similar foaming material of the apparatus to which said grommet is applied to fall out of the sleeve hole during the foaming operation.
According to another feature of the invention the sleeve is provided at both ends with a pair of shoulders for engagement with - ~05~3~
a front wall of the grommet ~nd the flange of the grommet arrarl-ged at the other front wall of the grommet as the sleeve is insert _ ed into the grommet.
The above and other features will be apparent from the follo~ _ ing detsiled description merely given by wa~ of example and there-fore not intended in a limiting sense, of an embodiment of the invention in connection with the accompanying drawing, wherein:
Fig. 1 is an elevation view of a screw grommet according to the invention before it is applied to a wall; .
~lg. 2 is a sectional view taken along the line 2-2 of Fig~ ;
Fig 3 is a front view of the screw grommet of Figs. 1 and 2 looking in the direction of arrow 3 of these figures;
Fig. 4 is a fragmentary view taken along the line 4-4 of Fig 3, appearing with Fig. 1; and ~ ig. 5 is a fragmentary front view of the screw grommet look-. ing in the direction of arrow 5 of Fig. 1 once a screw shank isinstroduced into the grommet, appearing with Fig. 1.
Referring to the ~igures of the drawing, there is seen. that the screw grommet 1 is provlded with a through hole 2 and a pair of outer frustoconical surfaces 3 and 4.
The hole 2 is square in cross-section with a recess 5 at the four corners in order to make the screw grommet flexible. The screw grommet is provided also at one of the fron-t faces thereof with a flan~e 6 which extends from this flange in a sleeve 7 whic~
`) is9luare in cross-section, having a-t the free end a hole 8 separa-1050310ted b~ means of a diaphragm 9 from a cavity 10 of trapezoidal shaI e the function of which is to make the sleeve 7 resilient. q'he lst-ker is connected to t~e remainder of the screw grommet by means of a pair of frangible -thin sections 11 and is provided in . dia-metrically opposed locations with a pair of projections 12. At the free end the sleeve 7 is provided with a pair of ~u~s 1~ dia~
metrically opposed and oriented with an angle of 90 degrees to the pro~ections 12~ In the ~lange 6 of the screw grommet 1 a pair of grooves 14 are provided in diametrically opposed locations, said grooves being designed to receive the lugs 13 as will be discussed hereinafter.
Assuming the screw grommet is to be secured to a wall 15 (se~
~ig. 2)~ the screw grommet is introduced into the hole 16 suitabl~
provided in the wall by taking advantage of the resiliency impar-ted to the screw ~rommet by the presence of the recesses 5 pro-vided at the four corners ol the hole 2. The screw grommet is thereby compressed on its frùstoconical surface 4 as a result of the engagement of this surface with the hole wall 16. At thi.s point a blow is struck on the end of the sleeve 7 so as to break the sections 11 connecting the sleeve to the screw grommet 1 and to cause the sleeve to penetrate the hole 2 and slide therein until the projections 12, which have entered the hole 2 as a re~
sult ol the resiliency imparted to the sleeve by the recesses 5, come out of the hole 2 and due to the resiliency take again their _ 4 _ ~6~5~313~G~
¦non compressed condition wherein the projec-tions engage the front ¦surface of the screw grommet 1O At the same time the lugs 13 eng . Ige in the grooves 14 of the f~ange 6 50 that the sleeve 7 is axial -ly adjusted with respect to the screw grommet~
¦ As the sleeve 7 has entered inside the screw grommet 1, the ¦sleeve expands the screw grommet which was compressed by the hole ¦wall 16 causing thereby the screw grommet to be locked within the hole~
¦ It is seen that the diaphragm 9 prevents the polyurethane ¦foam to ~all out of the inside of the wall 15 during the foaming . ¦operation which is necessary in apparatus or parts (for example ¦parts of a car body) -to which the screw grommet is being applied ¦ As the foamin~ operation is finished the screw grommet is ¦ready to receive a self-tapping screw, not shown, which is intro-¦ duced into the wall of the sleeve 7 by cutting therein the threadc J necessary to the engagement be-tween screw and grommet. Due to the square shape of the hole 2 and the sleeve 7~ the screw grommet cannot rotate as the screw is being tightened.
I While an embodiment only of the invention has been described ~ and illustrated it is obvious that various changes and modifica-¦tions can be made thereto without departing from the scope of the ¦invention.
Claims (18)
1. A plastic screw grommet, characterized in that it is provided with a through hole and extends a-t one end in a sleeve which is connected to the remainder portion of the grommet through a thin section, said -thin section being frangible upon a blow struck on the sleeve, said sleeve being designed to receive a self-tapping screw, said grommet being provided with a flange at said one end intended to abut the wall into which the grommet is secured, said grommet externally having a pair of opposite frustoconical surfaces connected to said flange with a reducing taper as the grommet external surface approaches said flange, and said sleeve being provided inside with a diaphragm for preventing the outflow of any foam or other foaming material through the sleeve hole from the apparatus to which said grommet is applied.
2. A plastic screw grommet according to Claim 1, characterized in that said sleeve is provided at both ends with shoulders for engagement respectively with said flange at said one end and with said other end of said grommet arranged as said sleeve is inserted into the grommet.
3. A plastic screw grommet according to Claim 1, characterized in that the hole and the outer surface of said sleeve are substantially square in cross-section, and said hole is provided at each of four corners with a relief recess in order to make the grommet flexible.
4. A plastic screw grommet according to Claim 2, characterized in that the hole and the outer surface of said sleeve are substantially square in cross-section, and said hole is provided at each of four corners with a relief recess in order to make the grommet flexible.
5. A plastic screw grommet according to Claim 1, characterized in that said diaphragm defines on the one hand the hole receiving the self-tapping screw and on the other hand a recess intended to make the sleeve flexible for introducing it in the grommet.
6. A plastic screw grommet according to Claim 2, characterized in that said diaphragm defines on the one hand the hole receiving the self-tapping screw and on the other hand a recess intended to make the sleeve flexible for introducing it in the grommet.
7. A plastic screw grommet according to Claim 3, characterized in that said diaphragm defines on the one hand the hole receiving the self-tapping screw and on the other hand a recess intended to make the sleeve flexible for introducing it in the grommet.
8. A plastic screw grommet according to Claim 4, characterized in that said diaphragm defines on the one hand the hole receiving the self-tapping screw and on the other hand a recess intended to make the sleeve flexible for introducing it in the grommet.
9. A plastic screw grommet according to Claim 2, characterized in that the shoulder at one end of said sleeve is formed of two diametrically opposed projections and the shoulder at the other end of said sleeve is formed of two diametrically opposed lugs arranged substantially at 90°
to the projections.
to the projections.
10. A plastic screw grommet according to Claim 3, characterized in that the shoulder at one end of said sleeve is formed of two diametrically opposed projections and the shoulder at the other end of said sleeve is formed of two diametrically opposed lugs arranged substantially at 90°
to the projections.
to the projections.
11. A plastic screw grommet according to Claim 4, characterized in that the shoulder at one end of said sleeve is formed of two diametrically opposed projections and the shoulder at the other end of said sleeve is formed of two diametrically opposed lugs arranged substantially at 90°
to the projections.
to the projections.
12. A plastic screw grommet according to Claim 5, characterized in that the shoulder at one end of said sleeve is formed of two diametrically opposed projections and the shoulder at the other end of said sleeve is formed of two diametrically opposed lugs arranged substantially at 90°
to the projections.
to the projections.
13. A plastic screw grommet according to Claim 6, characterized in that the shoulder at one end of said sleeve is formed of two diametrically opposed projections and the shoulder at the other end of said sleeve is formed of two diametrically opposed lugs arranged substantially at 90°
to the projections.
to the projections.
14. A plastic screw grommet according to Claim 7, characterized in that the shoulder at one end of said sleeve is formed of two diametrically opposed projections and the shoulder at the other end of said sleeve is formed of two diametrically opposed lugs arranged substantially at 90°
to the projections.
to the projections.
15. A plastic screw grommet according to Claim 8, characterized in that the shoulder at one end of said sleeve is formed of two diametrically opposed projections and the shoulder at the other end of said sleeve is formed of two diametrically opposed lugs arranged substantially at 90°
to the projections.
to the projections.
16. A plastic screw grommet according to Claim 9, Claim 10 or Claim 11, characterized in that said flange of grommet is provided with two diametrically opposed grooves, intended to receive the lugs of said sleeve as the latter is inserted into the grommet.
17. A plastic screw grommet according to Claim 12 or Claim 13, characterized in that said flange of grommet is provided with two diametrically opposed grooves, intended to receive the lugs of said sleeve as the latter is inserted into the grommet.
18. A plastic screw grommet according to Claim 14 or Claim 15, characterized in that said flange of grommet is provided with two diametrically opposed grooves, intended to receive the lugs of said sleeve as the latter is inserted into the grommet.
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| IT24290/75A IT1038966B (en) | 1975-06-12 | 1975-06-12 | SCREW IN PLASTIC MATERIAL WORKING AS AN DOWEL |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CA1050310A true CA1050310A (en) | 1979-03-13 |
Family
ID=11212973
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CA252,900A Expired CA1050310A (en) | 1975-06-12 | 1976-05-19 | Plastic screw grommet |
Country Status (8)
| Country | Link |
|---|---|
| JP (1) | JPS521266A (en) |
| BR (1) | BR7603643A (en) |
| CA (1) | CA1050310A (en) |
| DE (1) | DE2626005A1 (en) |
| ES (1) | ES448678A1 (en) |
| GB (1) | GB1503104A (en) |
| IT (1) | IT1038966B (en) |
| SE (1) | SE7605854L (en) |
Families Citing this family (11)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| FR2568327B1 (en) * | 1984-07-25 | 1988-09-09 | Dba | DEVICE FOR FIXING ON A WALL THE DUCTING DUCT OF A CABLE CONTROL |
| CH673677A5 (en) * | 1987-07-23 | 1990-03-30 | Schenker Emil Ag | |
| FR2670253B1 (en) * | 1990-12-10 | 1993-07-16 | Itw De France | NUT IN PLASTIC MATERIAL. |
| DE4411540A1 (en) * | 1994-04-02 | 1995-10-05 | Hoelzer & Wulf Kunststoff | Fastening device |
| JP4213381B2 (en) * | 2001-12-07 | 2009-01-21 | 株式会社パイオラックス | clip |
| JP4499614B2 (en) * | 2004-05-31 | 2010-07-07 | 株式会社パイオラックス | clip |
| FR2968369B1 (en) * | 2010-12-03 | 2013-08-02 | Lisi Automotive Rapid | CAGE DEVICE FOR A NUT THAT CAN BE SCREWED ON A SCREW |
| KR102193083B1 (en) | 2014-01-10 | 2020-12-18 | 가부시키가이샤 다이헨 | Arc welding control method |
| JP6555818B2 (en) | 2014-01-15 | 2019-08-07 | 株式会社ダイヘン | Arc welding control method |
| JP6555825B2 (en) | 2014-05-19 | 2019-08-07 | 株式会社ダイヘン | Arc welding control method |
| CN106794541B (en) | 2014-11-18 | 2019-11-12 | 株式会社达谊恒 | Arc welding control method |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB745788A (en) * | 1953-03-05 | 1956-02-29 | Illinois Tool Works | Improvements in anchoring screw threaded fasteners in workpieces |
-
1975
- 1975-06-12 IT IT24290/75A patent/IT1038966B/en active
-
1976
- 1976-05-19 CA CA252,900A patent/CA1050310A/en not_active Expired
- 1976-05-24 SE SE7605854A patent/SE7605854L/en unknown
- 1976-06-08 ES ES448678A patent/ES448678A1/en not_active Expired
- 1976-06-08 BR BR3643/76A patent/BR7603643A/en unknown
- 1976-06-10 DE DE19762626005 patent/DE2626005A1/en not_active Withdrawn
- 1976-06-10 JP JP51067202A patent/JPS521266A/en active Granted
- 1976-06-11 GB GB24239/76A patent/GB1503104A/en not_active Expired
Also Published As
| Publication number | Publication date |
|---|---|
| BR7603643A (en) | 1977-01-18 |
| JPS521266A (en) | 1977-01-07 |
| ES448678A1 (en) | 1977-07-01 |
| JPS5443136B2 (en) | 1979-12-18 |
| IT1038966B (en) | 1979-11-30 |
| GB1503104A (en) | 1978-03-08 |
| DE2626005A1 (en) | 1976-12-23 |
| SE7605854L (en) | 1976-12-13 |
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