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US3199698A
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US
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Control system for preventing the opening of a clamp device on a lift truck when thetruck is in motion
Assignee: Allis Chalmers Corp
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Filing: 1964-03-05
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Granted: 1965-08-10
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Expires: 1984-03-05
Abstract
No abstract record available.
Inventors
- 👤 Frank C Schuster
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 02:42
CPC Classifications
B; B66; B66F; B66F9/00; B66F9/06; B66F9/075; B66F9/12; B66F9/18; B66F9/183
Claims Analysis
Total Claims: 1
Claim 1
Independent Claim
79 words
IN A LIFT TRUCK HAVING A PAIR OF DRIVING WHEELS AND A POWER TRAIN FOR SAID WHEELS INCLUDING ROTARY POWER TRANSMITTING ELEMENTS IN CONSTANT DRIVING RELATION TO SAID WHEELS, THE COMBINATIN COMPRISING: A CLAMP ATTACHMENT A HYDRAULIC JACK FOR OPENING AND CLOSING SAID ATTACHMENT, A HYDRAULIC CONTROL SYSTEM FOR OPERATING SAID HYDRAULIC JACK INCLUDING A CONTROL VALVE, AND A SAFETY MECHANISM FOR PREVENTING OPENING OF SAID ATTACHMENT WHILE SAID DRIVING WHEELS ARE ROTATING INCLUDING AUTOMATICALLY OPERATED SHUTOFF VALVE MEANS.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1968-08-09 | 1969-02-08 | 1969-08-10 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1972-08-09 | 1973-02-08 | 1973-08-10 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1976-08-09 | 1977-02-08 | 1977-08-10 | $7700.00 | Window Closed / Lapsed |