Patent US3101639A successfully refreshed from Google Patents.
US3101639A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Automatic die clamping mechanism for power presses
Assignee: Niagara Machine and Tool Works
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Filing: 1959-09-28
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Granted: 1963-08-27
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Expires: 1979-09-28
Abstract
No abstract record available.
Inventors
- 👤 Robert H Cederleaf
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 23:33
CPC Classifications
B; B21; B21D; B21D37/00; B21D37/04; B30; B30B; B30B15/00; B30B15/02; B30B15/026; Y; Y10; Y10T; Y10T74/00; Y10T74/18; Y10T74/18568; Y10T74/188; Y10T74/18808; Y10T83/00; Y10T83/929; Y10T83/9457; Y10T83/9473
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
168 words
DIE CLAMPNG MEANS COMPRISING A CASING, AN OPERATING SHAFT JOURNALED THEREIN, AND A CLAMP MEMBER ASSOCIATED WITH SAID OPERATING SHAFT, A RACK MEMBER GUIDED FOR RECIPROCATING MOVEMENT IN SAID CASING AND A MESHING PINION FIXED TO SAID OPERATING SHAFT, SAID RACK MEMBER COMPRISING A PAIR OF COAXIAL, RADIALLY SPACED SLEEVE PORTIONS, THE INNER SLEEVE PORTION BEING OPEN AT ONE END AND CLOSED AT THE OTHER TO FORM FLUID CHAMBERS AT OPPOSITE SIDES OF SAID CLOSED END, THE OUTER SLEEVE PORTION BEING FIXED TO THE INNER SLEEVE AT THE OPEN END OF THE LATTER AND RADIALLY SPACED THEREFROM AT THE OTHER END TO FORM AN ANNULAR SPACE, A PISTON FIXED TO ONE END OF THE CASING AND PROJECTING INTO THE OPEN END OF THE INNER SLEEVE PORTION AND AN ANNULAR PISTON FIXED TO THE OTHER END OF THE CASING AND PROJECTING INTO SAID ANNULAR SPACE, SAID PISTONS HAVING FLUID PASSAGES THERETHROUGH FOR SELECTIVELY SUPPLYING OPERATING FLUID PRESSURE TO SAID FLUID CHAMBERS TO RECIPROCATE SAID RACK MEMBER IN OPPOSITE DIRECTIONS.
Claim 2
Dependent Claim
168 words
DIE CLAMPNG MEANS COMPRISING A CASING, AN OPERATING SHAFT JOURNALED THEREIN, AND A CLAMP MEMBER ASSOCIATED WITH SAID OPERATING SHAFT, A RACK MEMBER GUIDED FOR RECIPROCATING MOVEMENT IN SAID CASING AND A MESHING PINION FIXED TO SAID OPERATING SHAFT, SAID RACK MEMBER COMPRISING A PAIR OF COAXIAL, RADIALLY SPACED SLEEVE PORTIONS, THE INNER SLEEVE PORTION BEING OPEN AT ONE END AND CLOSED AT THE OTHER TO FORM FLUID CHAMBERS AT OPPOSITE SIDES OF SAID CLOSED END, THE OUTER SLEEVE PORTION BEING FIXED TO THE INNER SLEEVE AT THE OPEN END OF THE LATTER AND RADIALLY SPACED THEREFROM AT THE OTHER END TO FORM AN ANNULAR SPACE, A PISTON FIXED TO ONE END OF THE CASING AND PROJECTING INTO THE OPEN END OF THE INNER SLEEVE PORTION AND AN ANNULAR PISTON FIXED TO THE OTHER END OF THE CASING AND PROJECTING INTO SAID ANNULAR SPACE, SAID PISTONS HAVING FLUID PASSAGES THERETHROUGH FOR SELECTIVELY SUPPLYING OPERATING FLUID PRESSURE TO SAID FLUID CHAMBERS TO RECIPROCATE SAID RACK MEMBER IN OPPOSITE DIRECTIONS.
References Cited (Backward Citations)
US2224708A
Cited
US996140A
Cited
US979441A
Cited
US1237491A
Cited
US1441097A
Cited
US1941966A
Cited
US2009660A
Cited
US2098936A
Cited
US2202125A
Cited
US2404639A
Cited
US2532046A
Cited
US2621634A
Cited
US2626527A
Cited
US2681581A
Cited
US2610684A
Cited
US3027792A
Cited
US2980432A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1966-08-26 | 1967-02-25 | 1967-08-27 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1970-08-26 | 1971-02-25 | 1971-08-27 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1974-08-26 | 1975-02-25 | 1975-08-27 | $7700.00 | Window Closed / Lapsed |