US4483638A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Device for fixing a piercing or expanding plug to a piercing or expanding bar
Assignee: Vallourec SA
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Filing: 1981-05-29
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Granted: 1984-11-20
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Expires: 2001-05-29
Abstract
Abstract The invention relate to fixing a plug in the end of a bar, the assembly being used for production of cylindrical hollow blanks which will be later rolled. The device comprises a plug including at its rear end a shank which can be introduced into an axial socket provided at one end of the bar. A locking means can be introduced transversely through a hole in the wall of the bar and engage its end within a groove realized around the shank. A retaining means holds the locking means in position. The device is used for rapid mounting and dismantling the plug and bar assembly.
Inventors
- 👤 Roland Marie
- 👤 Michel Locoge
- 👤 Patrick Lambay
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 00:16
CPC Classifications
B; B21; B21B; B21B25/00; B21B25/06; Y; Y10; Y10T; Y10T403/00; Y10T403/59; Y10T403/598; Y10T403/60; Y10T403/602; Y10T403/604
Claims Analysis
Total Claims: 8
Claim 1
Independent Claim
168 words
A rapid dismantling and reassembly device for securing a plug to the end of a bar wherein one end of the bar comprises a socket and has a smooth hole communicating between an outside surface of the bar and the socket and wherein the plug is affixed to a shank which rests in said socket, said shank having on its periphery an annular groove, the device comprising a locking means which rests in said hole and has a front end which extends into said annular groove, the front end having a cross section having a larger dimension which is greater than the width of the groove and a smaller dimension which is narrower than the width of the groove, and a retaining means comprising a ring having elastic properties, said retaining means being disposed within said hole between said locking means and the outside surface of said bar and said locking means including a gripping means for removing said locking means and said retaining means from said hole.
Claim 2
Dependent Claim
168 words
A rapid dismantling and reassembly device for securing a plug to the end of a bar wherein one end of the bar comprises a socket and has a smooth hole communicating between an outside surface of the bar and the socket and wherein the plug is affixed to a shank which rests in said socket, said shank having on its periphery an annular groove, the device comprising a locking means which rests in said hole and has a front end which extends into said annular groove, the front end having a cross section having a larger dimension which is greater than the width of the groove and a smaller dimension which is narrower than the width of the groove, and a retaining means comprising a ring having elastic properties, said retaining means being disposed within said hole between said locking means and the outside surface of said bar and said locking means including a gripping means for removing said locking means and said retaining means from said hole.
Claim 3
Dependent Claim
27 words
A device according to claim 1 wherein the locking means comprises a substantially cylindrical head having a diameter that is larger than the width of the groove.
Claim 4
Dependent Claim
30 words
A device according to claim 1 wherein the gripping means maybe reversably attached to an extracting means by means of matching threads on said gripping means and said extracting means.
Claim 5
Dependent Claim
20 words
A device according to claim 1 wherein the retaining means is in contact within the hole with the locking means.
Claim 6
Dependent Claim
182 words
A rapid dismantling and reassembly device for securing a plug to the end of a bar wherein one end of the bar comprises a socket and has a smooth hole communicating between an outside surface of the bar and the socket and wherein the plug is affixed to a shank which rests in said socket, said shank having on its periphery an annular groove, the device comprising a locking means which rests in said hole, a retaining means disposed in said hole between said locking means and the outside surface of said bar, a compressible thrust means between said retaining means and said locking means, and a member which is attached to said locking means and communicates with a portion of said hole which is between said retaining means and the outside surface of said bar, wherein the locking means has a threaded hole and wherein said member is a bolt threadingly engaged on one end with the hole in said locking means, said bolt passing through the retaining means and being provided on the other end with a locking engagement means.
Claim 7
Dependent Claim
182 words
A rapid dismantling and reassembly device for securing a plug to the end of a bar wherein one end of the bar comprises a socket and has a smooth hole communicating between an outside surface of the bar and the socket and wherein the plug is affixed to a shank which rests in said socket, said shank having on its periphery an annular groove, the device comprising a locking means which rests in said hole, a retaining means disposed in said hole between said locking means and the outside surface of said bar, a compressible thrust means between said retaining means and said locking means, and a member which is attached to said locking means and communicates with a portion of said hole which is between said retaining means and the outside surface of said bar, wherein the locking means has a threaded hole and wherein said member is a bolt threadingly engaged on one end with the hole in said locking means, said bolt passing through the retaining means and being provided on the other end with a locking engagement means.
Claim 8
Dependent Claim
14 words
A device according to claim 5 wherein the compressible thrust means is a spring.
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1987-11-20 | 1988-05-21 | 1988-11-20 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1991-11-20 | 1992-05-21 | 1992-11-20 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1995-11-20 | 1996-05-21 | 1996-11-20 | $7700.00 | Window Closed / Lapsed |