US3958476A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Punching device with punch retainer
Assignee: Houdaille Industries Inc
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Filing: 1975-06-30
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Granted: 1976-05-25
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Expires: 1995-06-30
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 sleeve has a circumferential groove in which there is a radial aperture, and a retainer member is disposed in the groove and has a portion that projects radially through the radial aperture into an elongated recess in the punch body.
Inventors
- 👤 Kenneth J. Bartha
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 16:50
CPC Classifications
B; B21; B21D; B21D28/00; B21D28/24; B21D28/34; Y; Y10; Y10T; Y10T83/00; Y10T83/202; Y10T83/2092; Y10T83/2096; Y10T83/2135; Y10T83/215; Y10T83/2155; Y10T83/2159; Y10T83/2163; Y10T83/2166; Y10T83/869; Y10T83/8776; Y10T83/8785; Y10T83/929; Y10T83/9457; Y10T83/9473; Y10T83/9476
Claims Analysis
Total Claims: 9
Claim 1
Independent Claim
154 words
A punch 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, there being a groove extending circumferentially in said sleeve, and a radial aperture through said sleeve at said groove; c. a punch having a body slidably disposed in said sleeve, said body having an elongated recess in registration with said radial aperture; d. a stripping spring acting between said sleeve and said punch to urge the lower end of said punch into said sleeve; e. a lifting spring acting between said sleeve and said upper arm and urging said sleeve away from said die; and f. a retainer member disposed in said groove and having a portion projecting radially through said radial aperture into said elongated recess in said punch body.
Claim 2
Dependent Claim
154 words
A punch 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, there being a groove extending circumferentially in said sleeve, and a radial aperture through said sleeve at said groove; c. a punch having a body slidably disposed in said sleeve, said body having an elongated recess in registration with said radial aperture; d. a stripping spring acting between said sleeve and said punch to urge the lower end of said punch into said sleeve; e. a lifting spring acting between said sleeve and said upper arm and urging said sleeve away from said die; and f. a retainer member disposed in said groove and having a portion projecting radially through said radial aperture into said elongated recess in said punch body.
Claim 3
Dependent Claim
26 words
A punching device according to claim 1 in which said elongated recess is provided by an annular groove extending about the periphery of said punch body.
Claim 4
Dependent Claim
25 words
A punching device according to claim 1 in which said elongated recess is defined by a flat surface at one side of said body portion.
Claim 5
Dependent Claim
36 words
A punching device according to claim 1 in which said sleeve has a head formed as a washer engaging the end of said sleeve, and engaged by and disposed between said stripping and said lifting springs.
Claim 6
Dependent Claim
26 words
A punching device according to claim 1 in which said retainer is a wire having a bent end which is said portion in said radial aperture.
Claim 7
Dependent Claim
22 words
A punching device according to claim 1 in which said sleeve is freely slidably removable from said frame, in an upward direction.
Claim 8
Dependent Claim
19 words
A punching device according to claim 1 in which the lower end of said recess is a cam surface.
Claim 9
Dependent Claim
38 words
A punching device according to claim 1 in which said punch has a cutting portion of smaller size than its body, there being an upwardly and outwardly sloping cam surface at the lower end of said body portion.
References Cited (Backward Citations)
GB647163A
Cited
US2893488A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1979-05-25 | 1979-11-24 | 1980-05-25 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1983-05-25 | 1983-11-24 | 1984-05-25 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1987-05-25 | 1987-11-24 | 1988-05-25 | $7700.00 | Window Closed / Lapsed |