Patent US4007653A successfully refreshed from Google Patents.
US4007653A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Punching device with punch retainer
Assignee: Houdaille Industries Inc
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Filing: 1975-07-07
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Granted: 1977-02-15
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Expires: 1995-07-07
Abstract
Abstract A punching device includes a fixed frame adapted to support punch means in alignment with a ram. An assembly of the punch, a guide and stripping sleeve and a stripping spring is removable as a unit and such assembly includes means by which such assembly is retained together, especially during handling away from the frame of the punching device. To this end, the punch has a radial opening, such as a circumferential groove, in which there is disposed a friction member, such as of plastic, which has an interference fit with the interior of the stripping sleeve.
Inventors
- 👤 Percy L. Cady
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 12:04
CPC Classifications
B; B21; B21D; B21D45/00; B21D45/003; B21D45/006; Y; Y10; Y10T; Y10T83/00; Y10T83/202; Y10T83/2092; Y10T83/2096; Y10T83/2135; Y10T83/215; Y10T83/2155; Y10T83/2159; Y10T83/929; Y10T83/9411; Y10T83/9423; Y10T83/9457; Y10T83/9473; Y10T83/9476
Claims Analysis
Total Claims: 6
Claim 1
Independent Claim
147 words
A punching device comprising: a. a frame having a lower arm on which a die is supported, and an upper arm having a vertical bore aligned therewith; b. a punch guide and stripper sleeve slidably disposed in the bore in said upper arm; c. a punch having a body slidably diposed in said sleeve, said body having a radially opening recess therein directed toward the interior of said sleeve; d. a stripping spring acting between said sleeve and said punch to urge the lower end of said punch into said sleeve; e. a friction member, carried by said body, disposed in said body recess and having a sliding frictional fit with the interior wall of said sleeve greater than that which the punch body inherently has; and f. a lifting spring acting between said sleeve and said upper arm and urging said sleeve away from said die.
Claim 2
Dependent Claim
147 words
A punching device comprising: a. a frame having a lower arm on which a die is supported, and an upper arm having a vertical bore aligned therewith; b. a punch guide and stripper sleeve slidably disposed in the bore in said upper arm; c. a punch having a body slidably diposed in said sleeve, said body having a radially opening recess therein directed toward the interior of said sleeve; d. a stripping spring acting between said sleeve and said punch to urge the lower end of said punch into said sleeve; e. a friction member, carried by said body, disposed in said body recess and having a sliding frictional fit with the interior wall of said sleeve greater than that which the punch body inherently has; and f. a lifting spring acting between said sleeve and said upper arm and urging said sleeve away from said die.
Claim 3
Dependent Claim
15 words
A punching device according to claim 1 in which said recess is an annular groove.
Claim 4
Dependent Claim
35 words
A punching device according to claim 1 in which said friction member comprises a yieldable plastic material that has an interference fit with said sleeve, as related to the free form of the friction member.
Claim 5
Dependent Claim
54 words
A punching device according to claim 1 in which said punch includes a set of screw threads on the upper end of said body portion, and a head adjustably carried thereon against which said stripping spring acts, the radial depth of said recess being no greater than the radial depth of said screw threads.
Claim 6
Dependent Claim
16 words
A punching device according to claim 2 in which said frictional member is a cylindrical sleeve.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1980-02-15 | 1980-08-16 | 1981-02-15 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1984-02-15 | 1984-08-16 | 1985-02-15 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1988-02-15 | 1988-08-16 | 1989-02-15 | $7700.00 | Window Closed / Lapsed |