US3608650A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Impact cylinder apparatus
Assignee: Individual
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Filing: 1969-11-18
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Granted: 1971-09-28
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Expires: 1989-11-18
Abstract
Abstract An impulse stamping device having a cylinder in which a hollow piston and piston rod are mounted. The piston rod extends outwardly of the cylinder and has mounted at its end a dieholder. A ram having a head at its upper end is mounted within the hollow rod. The head is adapted to seat within a second cylinder located axially at the upper end of the first cylinder. Compressed gas is fed selectively to the cylinders to operate the piston rod and ram in sequence to first lower the dieholder and thereafter ram the die against the workpiece.
Inventors
- 👤 Saburo Matsusaka
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 11:37
CPC Classifications
B; B21; B21J; B21J15/00; B21J15/10; B21J15/16; B21J15/18; B21J7/00; B21J7/20; B21J7/22; B21J7/24; F; F15; F15B; F15B15/00; F15B15/08; F15B15/14; F15B15/1409
Claims Analysis
Total Claims: 6
Claim 1
Independent Claim
219 words
Impact apparatus comprising a cylinder having an upper and lower head defining therebetween a first air cavity, said upper head having a cutout portion defining a second air cavity, an axially hollow piston and integral piston rod, said hollow piston movably mounted within said first air cavity and dividing said cavity into upper and lower portions, said hollow piston rod extending tHrough said lower head outwardly of said cylinder and having an opening at the end thereof, a die holder movably mounted in the opening of said hollow piston rod, a ram slidingly mounted within said hollow piston and piston rod, said ram extending between said die holder and the upper end of said hollow piston, a ram piston head integral with the upper end of said ram having a profile adapted for insertion into said second cavity, means for introducing a gas under pressure into said upper portion of said first cavity to act simultaneously on said hollow piston and said ram piston head, and means for introducing a gas under pressure to said second cavity to act on said ram piston head whereby said hollow piston and rod may be moved downwardly through said first cavity at a predetermined rate and said ram may be moved downwardly through said hollow piston rod at a second predetermined rate.
Claim 2
Dependent Claim
219 words
Impact apparatus comprising a cylinder having an upper and lower head defining therebetween a first air cavity, said upper head having a cutout portion defining a second air cavity, an axially hollow piston and integral piston rod, said hollow piston movably mounted within said first air cavity and dividing said cavity into upper and lower portions, said hollow piston rod extending tHrough said lower head outwardly of said cylinder and having an opening at the end thereof, a die holder movably mounted in the opening of said hollow piston rod, a ram slidingly mounted within said hollow piston and piston rod, said ram extending between said die holder and the upper end of said hollow piston, a ram piston head integral with the upper end of said ram having a profile adapted for insertion into said second cavity, means for introducing a gas under pressure into said upper portion of said first cavity to act simultaneously on said hollow piston and said ram piston head, and means for introducing a gas under pressure to said second cavity to act on said ram piston head whereby said hollow piston and rod may be moved downwardly through said first cavity at a predetermined rate and said ram may be moved downwardly through said hollow piston rod at a second predetermined rate.
Claim 3
Dependent Claim
19 words
The apparatus according to claim 1 including means for accelerating said ram a speed greater than said piston rod.
Claim 4
Dependent Claim
51 words
The apparatus according to claim 1 wherein the ram piston head has a lower surface adapted to be carried by said hollow piston and wherein means are provided for introducing gas under pressure into the lower portion of said first cavity to lift said hollow piston and said ram piston head.
Claim 5
Dependent Claim
35 words
The apparatus according to claim 3 wherein each of said means for introducing air comprises selectively operable valve means and means for operating said valves to obtain sequential movement of said piston rod and ram.
Claim 6
Dependent Claim
64 words
The apparatus according to claim 1 wherein said second air cavity comprises a cylinder adapted to receive said ram piston head in sealing engagement therewith, said ram piston head being adapted to move out of such engagement on introduction of gas under pressure to said second cavity and into said first cavity to be acted thereon by the introduction of gas under pressure thereto.
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) | 1974-09-27 | 1975-03-29 | 1975-09-28 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-09-27 | 1979-03-29 | 1979-09-28 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-09-27 | 1983-03-29 | 1983-09-28 | $7700.00 | Window Closed / Lapsed |