US4034666A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Crank press
Assignee: Individual
•
Filing: 1975-12-08
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Granted: 1977-07-12
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Expires: 1995-12-08
Abstract
Abstract The crank press comprises a frame with a bed for accommodating the workpiece and with guides mounted on said frame perpendicularly to the bed surface, said guides supporting a slide which carries the working tool and being connected with the crankshaft by a kinematic chain comprising an engaging mechanism for starting the slide on its working stroke, said mechanism being made in the form of a power cylinder.
Inventors
- 👤 Oleg Pavlovich Bigun
- 👤 Grigory Matveevich Rodov
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 15:05
CPC Classifications
B; B30; B30B; B30B1/00; B30B1/26; B30B1/268; B30B15/00; B30B15/28; B30B15/281
Claims Analysis
Total Claims: 4
Claim 1
Independent Claim
195 words
A crank press including a tool comprising a frame with a bed for a work piece, guides mounted on said frame generally perpendicular to the surface of said bed, a slide disposed within said guides for translational movement and carrying said tool for moving same from a non-working position to a working position, a crankshaft mounted on said frame, a pair of toggle links pivotably connected at one end about a common axis and one of said pair having its other end pivotably connected to said crankshaft while the other of said pair having its other end pivotably connected to said slide; a fluid power cylinder having a moveable piston member pivotably connected at said common axis to said pair of toggle links, shock-absorbing means fixed to said frame and including a spring-loaded rod element disposed in the shock absorber, said cylinder being pivotably mounted to said shock-absorbing means which is fixedly mounted on said frame and said cylinder being disposed generally perpendicular to the axis of said slide, a compression spring urging said piston to permit the withdrawal of said slide from the working position upon release of fluid pressure acting on said piston.
Claim 2
Dependent Claim
195 words
A crank press including a tool comprising a frame with a bed for a work piece, guides mounted on said frame generally perpendicular to the surface of said bed, a slide disposed within said guides for translational movement and carrying said tool for moving same from a non-working position to a working position, a crankshaft mounted on said frame, a pair of toggle links pivotably connected at one end about a common axis and one of said pair having its other end pivotably connected to said crankshaft while the other of said pair having its other end pivotably connected to said slide; a fluid power cylinder having a moveable piston member pivotably connected at said common axis to said pair of toggle links, shock-absorbing means fixed to said frame and including a spring-loaded rod element disposed in the shock absorber, said cylinder being pivotably mounted to said shock-absorbing means which is fixedly mounted on said frame and said cylinder being disposed generally perpendicular to the axis of said slide, a compression spring urging said piston to permit the withdrawal of said slide from the working position upon release of fluid pressure acting on said piston.
Claim 3
Dependent Claim
29 words
The crank press according to claim 1, wherein said fluid power cylinder is single-acting and said compression spring is disposed between said piston and an end of said cylinder.
Claim 4
Dependent Claim
23 words
The crank press according to claim 1, including counterbalancing means attached to said slide for constantly urging said slide to the non-working position.
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) | 1980-07-11 | 1981-01-10 | 1981-07-12 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1984-07-11 | 1985-01-10 | 1985-07-12 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1988-07-11 | 1989-01-10 | 1989-07-12 | $7700.00 | Window Closed / Lapsed |