US3662640A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Machine tool
Assignee: Press Systems Inc
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Filing: 1969-10-09
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Granted: 1972-05-16
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Expires: 1989-10-09
Abstract
Abstract A press having a C-shaped frame including a die support surface and slide means for moving a punch toward and away from the support surface. A Y-shaped pitman has upwardly extending arms eccentrically mounted upon shaft means for effecting vertical reciprocation of the stem at the lower end of the pitman which is pivotally connected through a pressure fluid actuator to the slide means. Thus, vertical movement of the slide means relative to the support surface can be effected both by the eccentrics acting through the pitman and by the pressure fluid actuator acting between the pitman and the slide means. The fluid actuator includes means for making extremely small adjustments in the stroke of the pressure fluid actuator.
Inventors
- 👤 Theodore J Wrona
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 12:07
CPC Classifications
B; B30; B30B; B30B15/00; B30B15/0029; B30B15/0035; B30B1/00; B30B1/26; B30B1/265; B30B15/04; B30B15/041; B30B15/044; Y; Y10; Y10T; Y10T83/00; Y10T83/869; Y10T83/8696; Y10T83/87; Y10T83/8821; Y10T83/8841; Y10T83/8843
Claims Analysis
Total Claims: 9
Claim 1
Independent Claim
271 words
A machine for applying a compressive force to a workpiece, comprising: frame means having a rigid planar support surface; shaft means and bearing means rotatably supporting said shaft means on said fRame means axially parallel with and spaced from said rigid surface; a pair of identical, spaced eccentrics mounted upon and rotatable with said shaft means; a Y-shaped pitman having a stem and a pair of arms rotatably mounted upon said eccentrics; member means defining a surface opposed to and movable relative to said rigid surface, said rigid and movable surfaces being adapted for applying a compressive force to a workpiece therebetween; pressure fluid-actuated means connecting said stem to said member means having said movable surface for effecting relative movement between said stem and said movable surface in a direction toward and away from said rigid surface; said pressure fluid-actuated means including cylinder means movably supported upon said frame means and fixedly interconnected to said member means for movement toward and away from said rigid surface, and piston means mounted upon said stem and slidably disposed within said cylinder means; and rigid stop means adjustably mounted on one of said cylinder means and said piston means and coacting with the other of said cylinder means and said piston means for positively limiting relative movement between said cylinder means and said piston means toward said rigid surface for permitting the minimum spacing between said surfaces to be selectively varied, said stop means and said other of said cylinder means and said piston means having opposed stop surfaces disposed in abutting engagement when the minimum spacing exists between said rigid and movable surfaces.
Claim 2
Dependent Claim
271 words
A machine for applying a compressive force to a workpiece, comprising: frame means having a rigid planar support surface; shaft means and bearing means rotatably supporting said shaft means on said fRame means axially parallel with and spaced from said rigid surface; a pair of identical, spaced eccentrics mounted upon and rotatable with said shaft means; a Y-shaped pitman having a stem and a pair of arms rotatably mounted upon said eccentrics; member means defining a surface opposed to and movable relative to said rigid surface, said rigid and movable surfaces being adapted for applying a compressive force to a workpiece therebetween; pressure fluid-actuated means connecting said stem to said member means having said movable surface for effecting relative movement between said stem and said movable surface in a direction toward and away from said rigid surface; said pressure fluid-actuated means including cylinder means movably supported upon said frame means and fixedly interconnected to said member means for movement toward and away from said rigid surface, and piston means mounted upon said stem and slidably disposed within said cylinder means; and rigid stop means adjustably mounted on one of said cylinder means and said piston means and coacting with the other of said cylinder means and said piston means for positively limiting relative movement between said cylinder means and said piston means toward said rigid surface for permitting the minimum spacing between said surfaces to be selectively varied, said stop means and said other of said cylinder means and said piston means having opposed stop surfaces disposed in abutting engagement when the minimum spacing exists between said rigid and movable surfaces.
Claim 3
Dependent Claim
245 words
A machine for applying a compressive force to a workpiece, comprising: substantially C-shaped frame means having a head and a base projecting sidewardly in the same direction, the base having a substantially horizontal, upwardly facing support surface; shaft means rotatably and horizontally supported upon said head directly above the central portion of said support surface; a pair of spaced, identical eccentrics mounted upon and rotatable with said shaft means; a Y-shaped pitman having a downwardly extending stem and a pair of upwardly extending arms rotatably mounted upon said eccentrics; reciprocable means slidably supported upon said head and having a downwardly facing surface opposing said upwardly facing support surface, said reciprocable means being vertically movable toward and away from said support surface; pressure fluid-actuated means connecting said stem to said reciprocable means whereby rotation of said shaft means effects vertical reciprocation of said reciprocable means, said pressure fluid-actuated means comprising piston means pivotally secured to said stem and cylinder means secured to said reciprocable means; and rigid stop means adjustably mounted on said cylinder means and coacting with said piston means for positively limiting downward movement of said cylinder means relative to said piston means and for selectively adjusting the shut height between said upwardly and downwardly facing surfaces when said reciprocable means is in its lowermost position, said stop means and said piston means having opposed stop surfaces disposed in abutting engagement when the minimum shut height exists between said upwardly and downwardly facing surfaces.
Claim 4
Dependent Claim
245 words
A machine for applying a compressive force to a workpiece, comprising: substantially C-shaped frame means having a head and a base projecting sidewardly in the same direction, the base having a substantially horizontal, upwardly facing support surface; shaft means rotatably and horizontally supported upon said head directly above the central portion of said support surface; a pair of spaced, identical eccentrics mounted upon and rotatable with said shaft means; a Y-shaped pitman having a downwardly extending stem and a pair of upwardly extending arms rotatably mounted upon said eccentrics; reciprocable means slidably supported upon said head and having a downwardly facing surface opposing said upwardly facing support surface, said reciprocable means being vertically movable toward and away from said support surface; pressure fluid-actuated means connecting said stem to said reciprocable means whereby rotation of said shaft means effects vertical reciprocation of said reciprocable means, said pressure fluid-actuated means comprising piston means pivotally secured to said stem and cylinder means secured to said reciprocable means; and rigid stop means adjustably mounted on said cylinder means and coacting with said piston means for positively limiting downward movement of said cylinder means relative to said piston means and for selectively adjusting the shut height between said upwardly and downwardly facing surfaces when said reciprocable means is in its lowermost position, said stop means and said piston means having opposed stop surfaces disposed in abutting engagement when the minimum shut height exists between said upwardly and downwardly facing surfaces.
Claim 5
Dependent Claim
27 words
A machine according to claim 2, including resiliently flexible means connected between said head and said reciprocable means for resiliently resisting downward movement of said reciprocable means.
Claim 6
Dependent Claim
47 words
A machine according to claim 2, including counterbalance means on said shaft means counteracting the throw of said eccentrics; and drive means connected to said shaft means for rotating same, said drive means including adjustment means for effecting changes in the rotational speed of said shaft means.
Claim 7
Dependent Claim
56 words
A machine according to claim 2, wherein said stop means on said cylinder means comprises a collar threadedly engaged within said cylinder means and projecting upwardly therefrom; and scale means on the peripheral surfaCe at the upper end of said collar means for indicating the vertical movement of the collar means in response to rotation thereof.
Claim 8
Dependent Claim
54 words
A machine according to claim 2, wherein said cylinder means defines a piston chamber; and said reciprocable means includes an exhaust passageway connected to said piston chamber and rupturable means in said passageway blocking the escape of pressure fluid from said piston chamber until the pressure in said piston chamber exceeds a predetermined amount.
Claim 9
Dependent Claim
50 words
A machine according to claim 1, wherein said piston means is mounted upon said stem for pivotal movement around an axis parallel with the axis of said shaft means, and said cylinder means being slideably supported with the longitudinal axis thereof substantially perpendicular to the axis of said shaft means.
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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) | 1975-05-16 | 1975-11-15 | 1976-05-16 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-05-16 | 1979-11-15 | 1980-05-16 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-05-16 | 1983-11-15 | 1984-05-16 | $7700.00 | Window Closed / Lapsed |