US3279755A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Multi-stage hydraulic hoist
Assignee: REDEMAN CORP
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Filing: 1965-01-11
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Granted: 1966-10-18
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Expires: 1985-01-11
Abstract
No abstract record available.
Inventors
- 👤 Leo J Notenboom
- 👤 Harold M Peterson
- 👤 Joseph J Pfeiffer
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 07:57
CPC Classifications
B; B66; B66F; B66F11/00; B66F11/04; F; F15; F15B; F15B15/00; F15B15/08; F15B15/14; F15B15/1414; F15B15/16
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
146 words
A HOIST COMPRISING A BODY MEMBER HAVING AN OPENTOP ANNULAR CYLINDER OF EXTENDED LENGTH THEREIN WITH A CLOSING WALL AT THE BOTTOM, SAID BOTTOM THEREIN WITH A OPENING FOR DELIVERING FLUID UNDER PRESSURE TO THE CYLINDER AND FOR DUMPING SAID FLUID THEREFROM, A PISTON OF COMPARATIVELY SHORT LENGTH FITTING SAID CYLINDER, A STANCHION OF CIRCULAR CROSS-SECTION HAVING A DIAMETER SUBSTANTIALLY LESS THAN THAT OF THE CYLINDER AND A LENGTH AT LEAST AS LONG AS THE CYLINDER RECEIVED WITHIN THE CYLINDER, MEANS ATTACHING SAID PISTON TO THE LOWER THE STANCHION AND OCCUPYING THE SPACE BETWEEN THE STANCHION AND THE BODY MEMBER AT THE TOP OF END SPACE CYLINDER, AND MEANS DETACHABLY SECURING SAID HEADER TO THE BODY MEMBER HOLDING THE HEADER AGAINST DISPLACEMENT IN A DIRECTION ENDWISE TO THE CYLINDER, THE LOWER END OF THE STANCHION BEING NECKED DOWN TO PROVIDE A SEAT FOR THE PISTON, THE
Claim 2
Dependent Claim
146 words
A HOIST COMPRISING A BODY MEMBER HAVING AN OPENTOP ANNULAR CYLINDER OF EXTENDED LENGTH THEREIN WITH A CLOSING WALL AT THE BOTTOM, SAID BOTTOM THEREIN WITH A OPENING FOR DELIVERING FLUID UNDER PRESSURE TO THE CYLINDER AND FOR DUMPING SAID FLUID THEREFROM, A PISTON OF COMPARATIVELY SHORT LENGTH FITTING SAID CYLINDER, A STANCHION OF CIRCULAR CROSS-SECTION HAVING A DIAMETER SUBSTANTIALLY LESS THAN THAT OF THE CYLINDER AND A LENGTH AT LEAST AS LONG AS THE CYLINDER RECEIVED WITHIN THE CYLINDER, MEANS ATTACHING SAID PISTON TO THE LOWER THE STANCHION AND OCCUPYING THE SPACE BETWEEN THE STANCHION AND THE BODY MEMBER AT THE TOP OF END SPACE CYLINDER, AND MEANS DETACHABLY SECURING SAID HEADER TO THE BODY MEMBER HOLDING THE HEADER AGAINST DISPLACEMENT IN A DIRECTION ENDWISE TO THE CYLINDER, THE LOWER END OF THE STANCHION BEING NECKED DOWN TO PROVIDE A SEAT FOR THE PISTON, THE
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) | 1969-10-17 | 1970-04-18 | 1970-10-18 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1973-10-17 | 1974-04-18 | 1974-10-18 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1977-10-17 | 1978-04-18 | 1978-10-18 | $7700.00 | Window Closed / Lapsed |