Patent US3702181A successfully refreshed from Google Patents.
US3702181A
Expired / Lapsed
US
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Hydraulic outrigger jack with screw lock
Assignee: Kidde Inc
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Filing: 1970-12-15
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Granted: 1972-11-07
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Expires: 1990-12-15
Abstract
Abstract A HYDRAULIC JACK FOR USE ON THE OUTRIGGERS OF A MOBILE CRANE WHEREIN THE JACK IS PROVIDED WITH A SCREW LOCK AS A SAFETY FEATURE, FOR MAINTAINING THE JACK IN A DESIRED EXTENDED POSITION. THE JACK INCLUDES A PISTON RECIPROCABLY MOUNTED WITHIN A CYLINDER, AND IN ONE EMBODIMENT THE SCREW LOCK INCLUDES A MEMBER THEREADBLY MOUNTED WITHIN THE PISTON AND ADAPTED TO ENGAGE ONE END OF THE CYLINDER TO THEREBY LOCK THE JACK IN THE EXTENDED POSITION. IN ANOTHER EMBODIMENT THE SCREW LOCK INCLUDES A MEMBER THREADABLY MOUNTED WITHIN THE CYLINDER AND ADAPTED TO ENGAGE THE PISTON TO THEREBY LOCK THE HACK IN THE EXTENDED POSITION.
Inventors
- 👤 Joseph H Keller Jr
- 👤 Russell L Sterner
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 11:50
CPC Classifications
B; B66; B66C; B66C23/00; B66C23/62; B66C23/72; B66C23/78; B66C23/80
Claims Analysis
Total Claims: 0
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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) | 1975-11-07 | 1976-05-08 | 1976-11-07 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-11-07 | 1980-05-08 | 1980-11-07 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-11-07 | 1984-05-08 | 1984-11-07 | $7700.00 | Window Closed / Lapsed |