Patent US3179274A successfully refreshed from Google Patents.
US3179274A
Expired / Lapsed
US
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Control system for lift truck attachment
Assignee: Allis Chalmers Corp
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Filing: 1962-09-28
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Granted: 1965-04-20
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Expires: 1982-09-28
Abstract
No abstract record available.
Inventors
- 👤 Samuel T Comfort
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 15:59
CPC Classifications
B; B66; B66F; B66F9/00; B66F9/06; B66F9/075; B66F9/12; B66F9/18; B66F9/183; Y; Y10; Y10T; Y10T137/00; Y10T137/8593; Y10T137/86493; Y10T137/86574; Y10T137/86582; Y10T137/86614
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
130 words
IN COMBINATION WITH A LIFT TRUCK HAVING AN OPERATOR''S STATION AND A MATERIAL HANDLING ATTACHMENT MOUNTED ON A CARRIAGE WHICH IN TURN IS MOUNTED FOR VERTICAL MOVEMENT ON A MAST, A PLURALITY OF DOUBLE ACTING HYDRAULIC MOTORS ON SAID CARRIAGE WHICH UPON BEING ACTUATED EFFECT A PLURALITY OF ATTACHMENT FUNCTIONS, A SOURCE OF PRESSURE FLUID ON SAID TRUCK, A MANUALLY OPERABLE HYDRAULIC CONTROL VALVE ON SAID TRUCK AT THE OPERATOR''S STATION, A PAIR OF CONDUITS HAVING CORRESPONDING ENDS CONNECTED TO SAID CONTROL VALVE AND HAVING THE OPPOSITE ENDS TERMINATING ON SAID CARRIAGE, ELECTRICALLY OPERATED VALVE MEANS ON SAID CARRIAGE CONNECTED IN FLUID COMMUNICATION WITH SAID PAIR OF CONDUITS, BRANCH CONDUITS EXTENDING BETWEEN SAID VALVE MEANS AND SAID MOTORS, AND ELECTRICAL CONTROL MEANS FOR SELECTIVELY CONDITIONING SAID VALVE MEANS TO PREDETERMINED
Claim 2
Dependent Claim
130 words
IN COMBINATION WITH A LIFT TRUCK HAVING AN OPERATOR''S STATION AND A MATERIAL HANDLING ATTACHMENT MOUNTED ON A CARRIAGE WHICH IN TURN IS MOUNTED FOR VERTICAL MOVEMENT ON A MAST, A PLURALITY OF DOUBLE ACTING HYDRAULIC MOTORS ON SAID CARRIAGE WHICH UPON BEING ACTUATED EFFECT A PLURALITY OF ATTACHMENT FUNCTIONS, A SOURCE OF PRESSURE FLUID ON SAID TRUCK, A MANUALLY OPERABLE HYDRAULIC CONTROL VALVE ON SAID TRUCK AT THE OPERATOR''S STATION, A PAIR OF CONDUITS HAVING CORRESPONDING ENDS CONNECTED TO SAID CONTROL VALVE AND HAVING THE OPPOSITE ENDS TERMINATING ON SAID CARRIAGE, ELECTRICALLY OPERATED VALVE MEANS ON SAID CARRIAGE CONNECTED IN FLUID COMMUNICATION WITH SAID PAIR OF CONDUITS, BRANCH CONDUITS EXTENDING BETWEEN SAID VALVE MEANS AND SAID MOTORS, AND ELECTRICAL CONTROL MEANS FOR SELECTIVELY CONDITIONING SAID VALVE MEANS TO PREDETERMINED
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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) | 1968-04-19 | 1968-10-19 | 1969-04-20 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1972-04-19 | 1972-10-19 | 1973-04-20 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1976-04-19 | 1976-10-19 | 1977-04-20 | $7700.00 | Window Closed / Lapsed |