US3173673A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Powered work-clamping device
Assignee: Power Jacks Ltd
•
Filing: 1962-03-06
•
Granted: 1965-03-16
•
Expires: 1982-03-06
Abstract
No abstract record available.
Inventors
- 👤 Northern Dennis George
- 👤 Parrington Brian Burwell
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 17:43
CPC Classifications
B; B25; B25B; B25B5/00; B25B5/06; B25B5/061; B25B5/062
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
57 words
A POWERED WORK-CLAMPING DEVICE COMPRISING, A ROTATIVELY MOUNTED PILLAR, A CLAMPING LEVER PIVOTED ON SAID PILLAR SAID LEVER BEING PROVIDED WITH A WORK-ENGAGING ELEMENT AT ONE END, A HYDRAULICALLY-OPERATED PISTON FOR ENGAGING THE OPPOSITE END OF THE LEVER TO THEREBY BRING THE WORK-ENGAGING ELEMENT INTO WORK-CLAMPING POSITION, SPRING MEANS FOR BIASING THE PISTON TO ITS RETRACTED POSI-
Claim 2
Dependent Claim
57 words
A POWERED WORK-CLAMPING DEVICE COMPRISING, A ROTATIVELY MOUNTED PILLAR, A CLAMPING LEVER PIVOTED ON SAID PILLAR SAID LEVER BEING PROVIDED WITH A WORK-ENGAGING ELEMENT AT ONE END, A HYDRAULICALLY-OPERATED PISTON FOR ENGAGING THE OPPOSITE END OF THE LEVER TO THEREBY BRING THE WORK-ENGAGING ELEMENT INTO WORK-CLAMPING POSITION, SPRING MEANS FOR BIASING THE PISTON TO ITS RETRACTED POSI-
References Cited (Backward Citations)
US572936A
Cited
US2153637A
Cited
US2398178A
Cited
US2512787A
Cited
US2908205A
Cited
US3027792A
Cited
US2945523A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1968-03-15 | 1968-09-14 | 1969-03-16 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1972-03-15 | 1972-09-14 | 1973-03-16 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1976-03-15 | 1976-09-14 | 1977-03-16 | $7700.00 | Window Closed / Lapsed |