Patent US4972093A successfully refreshed from Google Patents.
Patent US3584497A successfully refreshed from Google Patents.
US3584497A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Sliding parallel ways for releasing jammed press
Assignee: Dover Corp
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Filing: 1968-08-16
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Granted: 1971-06-15
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Expires: 1988-08-16
Abstract
Abstract Method and apparatus for freeing jammed press from dead center position comprising sliding parallel wedge members interposed between dies and die bolster plate adapted to retain fixed position during normal press operation and for relative sliding for relieving pressure upon press jamming.
Inventors
- 👤 William L Pohjola
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 19:36
CPC Classifications
B; B21; B21D; B21D55/00; B30; B30B; B30B15/00; B30B15/0047
Claims Analysis
Total Claims: 8
Claim 1
Independent Claim
84 words
The method of relieving binding pressure forces in a metal forming press, comprising; mounting parallel sliding ways transversely and relatively between a die set and a die mounting press part, keying said ways together for normal press operation use in a nonadjustable position to maintain a fixed thickness of the ways, freeing said ways, relative to each other, for inclined planar slide movement thereof relieving binding pressure forces in said press, and returning the ways to the keyed position to restore said fixed thickness.
Claim 2
Independent Claim
84 words
The method of relieving binding pressure forces in a metal forming press, comprising; mounting parallel sliding ways transversely and relatively between a die set and a die mounting press part, keying said ways together for normal press operation use in a nonadjustable position to maintain a fixed thickness of the ways, freeing said ways, relative to each other, for inclined planar slide movement thereof relieving binding pressure forces in said press, and returning the ways to the keyed position to restore said fixed thickness.
Claim 3
Dependent Claim
16 words
The method of claim 1, including keying said ways together on an accessible sidewall face thereof.
Claim 4
Dependent Claim
102 words
In combination with a metal forming press subject to die set locking pressure forces, the improvement comprising; parallel sliding ways including complementary wedge members having inclined planar surfaces received together and providing upper and lower disposed walls in parallel relation apart, means for disposing said ways in a press transversely between a die set and a die set supporting press part, means for keying said wedge members together for the transmission of press forces therethrough and for permitting relative movement therebetween for the relief of binding press forces as required, and means to return said ways to a nonadjustable predetermined fixed position.
Claim 5
Dependent Claim
102 words
In combination with a metal forming press subject to die set locking pressure forces, the improvement comprising; parallel sliding ways including complementary wedge members having inclined planar surfaces received together and providing upper and lower disposed walls in parallel relation apart, means for disposing said ways in a press transversely between a die set and a die set supporting press part, means for keying said wedge members together for the transmission of press forces therethrough and for permitting relative movement therebetween for the relief of binding press forces as required, and means to return said ways to a nonadjustable predetermined fixed position.
Claim 6
Dependent Claim
26 words
The improvement of claim 3, said wedge members having truncated ends permissive of relative slide movement between the inclined planar surfaces thereof without end wall interference.
Claim 7
Dependent Claim
54 words
The improvement of claim 4, said keying means including a key slot formed within and transversely across the sidewalls of said wedge members near one end thereof, and a key plate received in said slot and including fastener means of engagement with the wedge members therebehind and for disengagement of said key plate therefrom.
Claim 8
Dependent Claim
25 words
The improvement of claim 5, said wedge members having the inclined planar surfaces thereof formed to complement each other and preclude relative lateral movement therebetween.
References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1974-06-14 | 1974-12-14 | 1975-06-15 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-06-14 | 1978-12-14 | 1979-06-15 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-06-14 | 1982-12-14 | 1983-06-15 | $7700.00 | Window Closed / Lapsed |