US3141652A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Double-lift jack
Assignee: Individual
•
Filing: 1963-02-28
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Granted: 1964-07-21
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Expires: 1983-02-28
Abstract
No abstract record available.
Inventors
- 👤 Lawrence C Montgomery
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 20:51
CPC Classifications
B; B66; B66F; B66F1/00; B66F1/02; B66F1/04; B66F1/06; Y; Y10; Y10T; Y10T74/00; Y10T74/15; Y10T74/1526; Y10T74/1553; Y10T74/1558; Y10T74/1587; Y10T74/1598
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
171 words
A DOUBLE-LIFT JACK, COMPRISING: A BASE; A HOUSING SECURED TO SAID BASE; A LIFT MEMBER TELESCOPINGLY RECEIVED BY SAID HOUSING, SAID LIFT MEMBER HAVING A SERIES OF RATCHET TEETH ON OPPOSING SURFACES; BEARINGS SUPPORTED BY OPPOSING SIDES OF THE UPPER END PORTION OF SAID HOUSING; A SADDLE SUPPORTED BY SAID BEARINGS; A STIRRUP CONNECTED TO ONE END OF SAID SADDLE; A PAWL SUPPORTED BY THE OTHER END OF SAID SADDLE AND ENGAGED WITH THE ADJACENT SERIES OF SAID RATCHET TEETH; A HANDLE HAVING ONE END ENGAGING THE RATCHET TEETH ON THAT SIDE OF THE LIFT MEMBER ADJACENT SAID STIRRUP AND FULCRUMED BY THE STIRRUP TO PULL SAID SADDLE ACROSS SAID BEARINGS AND SIMULTANEOUSLY APPLY A LIFTING FORCE TO THE RATCHET TEETH ON OPPOSING SIDES OF SAID LIFT MEMBER AND ELEVATE THE LATTER WITH RESPECT TO SAID HOUSING AS THE FREE END OF SAID HANDLE IS MOVED DOWNWARDLY; AND LOCKING MEANS CONNECTED WITH SAID HOUSING AND ENGAGED WITH ONE SERIES OF SAID RATCHET TEETH FOR HOLDING SAID LIFT MEMBER IN ELEVATED POSITION.
Claim 2
Dependent Claim
171 words
A DOUBLE-LIFT JACK, COMPRISING: A BASE; A HOUSING SECURED TO SAID BASE; A LIFT MEMBER TELESCOPINGLY RECEIVED BY SAID HOUSING, SAID LIFT MEMBER HAVING A SERIES OF RATCHET TEETH ON OPPOSING SURFACES; BEARINGS SUPPORTED BY OPPOSING SIDES OF THE UPPER END PORTION OF SAID HOUSING; A SADDLE SUPPORTED BY SAID BEARINGS; A STIRRUP CONNECTED TO ONE END OF SAID SADDLE; A PAWL SUPPORTED BY THE OTHER END OF SAID SADDLE AND ENGAGED WITH THE ADJACENT SERIES OF SAID RATCHET TEETH; A HANDLE HAVING ONE END ENGAGING THE RATCHET TEETH ON THAT SIDE OF THE LIFT MEMBER ADJACENT SAID STIRRUP AND FULCRUMED BY THE STIRRUP TO PULL SAID SADDLE ACROSS SAID BEARINGS AND SIMULTANEOUSLY APPLY A LIFTING FORCE TO THE RATCHET TEETH ON OPPOSING SIDES OF SAID LIFT MEMBER AND ELEVATE THE LATTER WITH RESPECT TO SAID HOUSING AS THE FREE END OF SAID HANDLE IS MOVED DOWNWARDLY; AND LOCKING MEANS CONNECTED WITH SAID HOUSING AND ENGAGED WITH ONE SERIES OF SAID RATCHET TEETH FOR HOLDING SAID LIFT MEMBER IN ELEVATED POSITION.
References Cited (Backward Citations)
US415687A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1967-07-21 | 1968-01-20 | 1968-07-21 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1971-07-21 | 1972-01-20 | 1972-07-21 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1975-07-21 | 1976-01-20 | 1976-07-21 | $7700.00 | Window Closed / Lapsed |