US3077951A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Lift truck mast operation sequence mechanism
Assignee: KNICKERBOCKER Co
•
Filing: 1958-09-22
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Granted: 1963-02-19
•
Expires: 1978-09-22
Abstract
No abstract record available.
Inventors
- 👤 Keith E Ramsey
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 10:44
CPC Classifications
B; B66; B66F; B66F9/00; B66F9/06; B66F9/075; B66F9/08
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
80 words
IN A LIFT MAST STRUCTURE COMPRISING IN COMBINATION, OUTER, INTERMEDIATE AND INNER MASTS IN TELESCOPING RELATION, A GUIDE FORMED ON SAID INNER MAST, A LOAD CARRYING MEMBER MOVABLY SUPPORTED WITHIN SAID GUIDE, AN EXPANSION UNIT HAVING FIRST AND SECOND RELATIVELY EXPANSIBLE ELEMENTS, SAID FIRST ELEMENT BEING AFFIXED TO SAID INTERMEDIATE MAST AND INNER MAST ABUTMENT MEANS ENGAGING SAID SECOND ELEMENT FOR TRANSFERRING MOVEMENT OF SAID SECOND ELEMENT TO SAID INNER MAST TO LIFT SAID INNER MAST, A FIRST SHEAVE RO-
Claim 2
Dependent Claim
80 words
IN A LIFT MAST STRUCTURE COMPRISING IN COMBINATION, OUTER, INTERMEDIATE AND INNER MASTS IN TELESCOPING RELATION, A GUIDE FORMED ON SAID INNER MAST, A LOAD CARRYING MEMBER MOVABLY SUPPORTED WITHIN SAID GUIDE, AN EXPANSION UNIT HAVING FIRST AND SECOND RELATIVELY EXPANSIBLE ELEMENTS, SAID FIRST ELEMENT BEING AFFIXED TO SAID INTERMEDIATE MAST AND INNER MAST ABUTMENT MEANS ENGAGING SAID SECOND ELEMENT FOR TRANSFERRING MOVEMENT OF SAID SECOND ELEMENT TO SAID INNER MAST TO LIFT SAID INNER MAST, A FIRST SHEAVE RO-
References Cited (Backward Citations)
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Cited
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1966-02-18 | 1966-08-20 | 1967-02-19 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1970-02-18 | 1970-08-20 | 1971-02-19 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1974-02-18 | 1974-08-20 | 1975-02-19 | $7700.00 | Window Closed / Lapsed |