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Patent US3335877A successfully refreshed from Google Patents.
US3335877A
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Lowerable a-frame assembly for mobile cranes and the like
Assignee: Caterpillar Global Mining LLC
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Filing: 1966-04-18
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Granted: 1967-08-15
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Expires: 1986-04-18
Abstract
No abstract record available.
Inventors
- 👤 Pezzini Mario
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-07 18:22
CPC Classifications
B; B66; B66C; B66C23/00; B66C23/18; B66C23/36; B66C23/62; B66C23/72; B66C2700/00; B66C2700/03; B66C2700/0321; B66C2700/0357; B66C2700/0392
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
78 words
IN A LOWERABLE A-FRAME ASSEMBLY FOR MOBILE CRANES AND THE LIKE, A FOLDABLE TENSION LEG COMPRISING: RIGID UPPER AND LOWER LINKS WITH FACING ENDS, SAID LINKS BEING IN ALIGNMENT WHEN THE LEG IS UNDER TENSION; AND A PIN AND INCLINED SLOT CONNECTION BETWEEN THE LINKS AT THEIR FACING ENDS SO THAT UPON A RELEASE OF TENSION ON THE LEG THE LINKS MOVE OUT OF ALIGNMENT AND BEGIN TO FOLD TOGETHER IN A DESIRED DIRECTION IN RESPONSE TO GRAVITY.
Claim 2
Dependent Claim
78 words
IN A LOWERABLE A-FRAME ASSEMBLY FOR MOBILE CRANES AND THE LIKE, A FOLDABLE TENSION LEG COMPRISING: RIGID UPPER AND LOWER LINKS WITH FACING ENDS, SAID LINKS BEING IN ALIGNMENT WHEN THE LEG IS UNDER TENSION; AND A PIN AND INCLINED SLOT CONNECTION BETWEEN THE LINKS AT THEIR FACING ENDS SO THAT UPON A RELEASE OF TENSION ON THE LEG THE LINKS MOVE OUT OF ALIGNMENT AND BEGIN TO FOLD TOGETHER IN A DESIRED DIRECTION IN RESPONSE TO GRAVITY.
References Cited (Backward Citations)
US3072265A
Cited
US3249238A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1970-08-14 | 1971-02-13 | 1971-08-15 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1974-08-14 | 1975-02-13 | 1975-08-15 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1978-08-14 | 1979-02-13 | 1979-08-15 | $7700.00 | Window Closed / Lapsed |