US3347522A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Step-by-step driving-jack
Assignee: Werkzeugfabrik Selzach AG
•
Filing: 1966-04-08
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Granted: 1967-10-17
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Expires: 1986-04-08
Abstract
No abstract record available.
Inventors
- 👤 Reinmann Alfred
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-07 15:59
CPC Classifications
B; B66; B66F; B66F3/00; B66F3/24; B66F3/25; B66F3/30; E; E02; E02B; E02B17/00; E02B17/04; E02B17/08; E02B17/0836; E02B17/0854; E04; E04G; E04G11/00; E04G11/06; E04G11/20; E04G11/22; E04G11/24; Y; Y10; Y10T; Y10T24/00; Y10T24/44; Y10T24/44068; Y10T24/44573; Y10T24/4459; Y10T24/44607
Claims Analysis
Total Claims: 1
Claim 1
Independent Claim
144 words
A DRIVING-JACK EQUIPMENT FOR STEPWISE ADVANCING A LOAD ALONG A SUPPORT, COMPRISING A CYLINDER AND A PISTON RELATIVELY DISPLACEABLE BY MEAN OF PRESSURE FLUID, AND A GRIPPING HEAD CONNECTED TO EACH SAID CYLINDER AND PISTON IN SURROUNDING RELATION TO SAID SUPPORT, EACH OF SAID GRIPPING HEADS HAVING AT LEAST ONE SET OF GRIPPING JAWS DISPOSED AROUND SAID SUPPORT AND HAVING A PLANE-PARALLEL SIDE SURFACES, AN INNER TOOTHED GRIPPING SURFACE AND AN OUTER WEDGING SURFACE, EACH SAID GRIPPING HEAD HAVING A CONICAL WEDGING SURFACE OUTSIDE SAID OUTER WEDGING SURFACE OF THE RESPECTIVE GRIPPING JAWS, EACH SAID HEAD INCLUDING AN ANNULAR CAGE COOPERATIVE WITH SAID JAWS AND HAVING RADIAL SLOTS WITH PLANE-PARALLEL SURFACES, SAID GRIPPING JAWS BEING MOVABLE IN SAID SLOTS WITH THEIR PLANE-PARALLEL SIDE SURFACES ADJACENT SAID SLOT PLANE-PARALLEL SURFACES TO ENABLE SAID JAWS TO BE RADIALLY WEDGED BETWEEN SAID WEDGING SURFACE AND SAID SUPPORT.
References Cited (Backward Citations)
US1159096A
Cited
US1400701A
Cited
US1508661A
Cited
US1730619A
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US1817467A
Cited
US2534213A
Cited
US2756019A
Cited
US2874437A
Cited
US2902256A
Cited
US3117485A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1970-10-16 | 1971-04-17 | 1971-10-17 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1974-10-16 | 1975-04-17 | 1975-10-17 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1978-10-16 | 1979-04-17 | 1979-10-17 | $7700.00 | Window Closed / Lapsed |