US3138270A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Foldable load lifting apparatus
Assignee: H S WATSON CO
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Filing: 1962-03-07
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Granted: 1964-06-23
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Expires: 1982-03-07
Abstract
No abstract record available.
Inventors
- 👤 Lee A Mccarty
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 04:46
CPC Classifications
B; B60; B60P; B60P1/00; B60P1/44; B60P1/4414; B60P1/445
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
189 words
A FOLDABLE LOAD LIFTING APPARTUS COMPRISING A FRAME WITH RESPECT TO WHICH A LOAD IS TO BE LIFTED, A NORMALLY HORIZONTAL LOAD SUPPORTING MEMBER SPACED FROM SAID FRAME, SUPPORT MEANS BETWEEN SAID MEMBER AND SAID FRAME FOR CONNECTING SAID MEMBER TO SAID FRAME, SAID SUPPORT MEANS INCLUDING A PAIR OF TENSION ARMS, EACH PIVOTALLY CONNECTED AT ONE END TO SAID FRAME, WITH SAID MEMBER DISPOSED WHOLLY BETWEEN AND PIVOTALLY CONNECTED TO THE OTHER ENDS OF SAID TENSION ARMS, AND A PAIR OF COMPRESSION ARMS, ONE ADJACENT EACH TENSION ARM ON THE SIDE THEREOF REMOTE FROM SAID MEMBER, PIVOTALLY CONNECTED AT ONE END TO SAID MEMBER AND AT THE OTHER END TO SAID FRAME, SAID ARMS BEING NORMALLY PARALLEL AND OF EQUAL LENGTH THEREBY NORMALLY MAINTAINING SAID MEMBER IN A HORIZONTAL POSITION, POWER MEANS FOR SWINGING SAID SUPPORT MEANS FROM A LOWER POSITION TO AN UPPER POSITION WITH RESPECT TO SAID FRAME, AND MEANS EMBODIED BETWEEN THE ENDS OF THE ARMS OF ONE OF SAID PAIRS PERMITTING SAID ARMS TO CHANGE IN LENGTH RESPONSIVE TO ROTATION OF SAID MEMBER UPWARDLY ABOUT ITS PIVOTAL CONNECTION WITH THE OTHER PAIR OF ARMS.
Claim 2
Dependent Claim
189 words
A FOLDABLE LOAD LIFTING APPARTUS COMPRISING A FRAME WITH RESPECT TO WHICH A LOAD IS TO BE LIFTED, A NORMALLY HORIZONTAL LOAD SUPPORTING MEMBER SPACED FROM SAID FRAME, SUPPORT MEANS BETWEEN SAID MEMBER AND SAID FRAME FOR CONNECTING SAID MEMBER TO SAID FRAME, SAID SUPPORT MEANS INCLUDING A PAIR OF TENSION ARMS, EACH PIVOTALLY CONNECTED AT ONE END TO SAID FRAME, WITH SAID MEMBER DISPOSED WHOLLY BETWEEN AND PIVOTALLY CONNECTED TO THE OTHER ENDS OF SAID TENSION ARMS, AND A PAIR OF COMPRESSION ARMS, ONE ADJACENT EACH TENSION ARM ON THE SIDE THEREOF REMOTE FROM SAID MEMBER, PIVOTALLY CONNECTED AT ONE END TO SAID MEMBER AND AT THE OTHER END TO SAID FRAME, SAID ARMS BEING NORMALLY PARALLEL AND OF EQUAL LENGTH THEREBY NORMALLY MAINTAINING SAID MEMBER IN A HORIZONTAL POSITION, POWER MEANS FOR SWINGING SAID SUPPORT MEANS FROM A LOWER POSITION TO AN UPPER POSITION WITH RESPECT TO SAID FRAME, AND MEANS EMBODIED BETWEEN THE ENDS OF THE ARMS OF ONE OF SAID PAIRS PERMITTING SAID ARMS TO CHANGE IN LENGTH RESPONSIVE TO ROTATION OF SAID MEMBER UPWARDLY ABOUT ITS PIVOTAL CONNECTION WITH THE OTHER PAIR OF ARMS.
References Cited (Backward Citations)
US2696923A
Cited
US2822938A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1967-06-23 | 1967-12-23 | 1968-06-23 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1971-06-23 | 1971-12-23 | 1972-06-23 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1975-06-23 | 1975-12-23 | 1976-06-23 | $7700.00 | Window Closed / Lapsed |