US3098574A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Hydraulically driven industrial truck
Assignee: HEIFRED CORP
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Filing: 1961-06-08
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Granted: 1963-07-23
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Expires: 1981-06-08
Abstract
No abstract record available.
Inventors
- 👤 Marco Robert F De
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 04:00
CPC Classifications
B; B60; B60K; B60K7/00; B60K7/0015; B60K17/00; B60K17/04; B60K17/043; B60K17/10; B60L; B60L15/00; B60L15/20; B60L15/2054; B60L50/00; B60L50/50; B60L50/52; B66; B66F; B66F9/00; B66F9/06; B66F9/075; B66F9/07568; B66F9/07572; B60K2007/0046; B60K2007/0061; B60L2200/00; B60L2200/40; B60L2200/44; B60L2220/00; B60L2220/40; B60L2220/46; Y; Y02; Y02P; Y02P90/00; Y02P90/60; Y02T; Y02T10/00; Y02T10/60; Y02T10/64; Y02T10/70; Y02T10/72
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
165 words
AN INDUSTRIAL TRUCK INCLUDING A CHASSIS, A PAIR OF DRIVING WHEELS, A HOIST MAST CARRIED BY THE CHASSIS, A HOIST ON THE MAST, HYDRAULIC MOTORS DRIVINGLY CONNECTED TO THE WHEELS, RESPECTIVELY, A FIRST PISTON AND CYLINDER ASSEMBLAGE FOR OPERATING THE HOIST, A SECOND PISTON AND CYLINDER ASSEMBLAGE FOR TILTING THE MAST, A SINGLE UNIDIRECTIONAL DIRECT CURRENT ELECTRIC MOTOR, A BATTERY CARRIED BY CHASSIS FOR ENERGIZING THE ELECTRIC MOTOR, TWO SPEARATE VARIABLE DELIVERY HYDRAULIC PUMPS CONNECTED TO THE ELECTRIC MOTOR MEANS AND DRIVEN THEREBY, ONE CIRCUIT CONNECTING ONE PUMP TO THE HYDRAULIC MOTORS IN PARALLEL AND AN ADDITIONAL CIRCUIT CONNECTING THE OTHER PUMP TO THE ASSEMBLAGES, SAID TWO LAST MENTIONED CIRCUITS BEING NORMALLY DISCONNECTED FROM EACH OTHER, VALVE MEANS FOR CONTROLLING THE DIRECTION OF FLOW OF PRESSURE FLUID IN SAID ONE CIRCUIT OT THE HYDRAULIC MOTORS AND IN THE ADDITIONAL CIRCUIT TO THE ASSEMBLAGES, RESPECTIVELY, AND ADDITIONAL VALVE MEANS FOR DIVERTING THE PRESSURE FLUID FROM THE ADDITIONAL CIRCUIT TO THE PRESSURE SIDE OF SAID ONE CIRCUIT.
Claim 2
Dependent Claim
165 words
AN INDUSTRIAL TRUCK INCLUDING A CHASSIS, A PAIR OF DRIVING WHEELS, A HOIST MAST CARRIED BY THE CHASSIS, A HOIST ON THE MAST, HYDRAULIC MOTORS DRIVINGLY CONNECTED TO THE WHEELS, RESPECTIVELY, A FIRST PISTON AND CYLINDER ASSEMBLAGE FOR OPERATING THE HOIST, A SECOND PISTON AND CYLINDER ASSEMBLAGE FOR TILTING THE MAST, A SINGLE UNIDIRECTIONAL DIRECT CURRENT ELECTRIC MOTOR, A BATTERY CARRIED BY CHASSIS FOR ENERGIZING THE ELECTRIC MOTOR, TWO SPEARATE VARIABLE DELIVERY HYDRAULIC PUMPS CONNECTED TO THE ELECTRIC MOTOR MEANS AND DRIVEN THEREBY, ONE CIRCUIT CONNECTING ONE PUMP TO THE HYDRAULIC MOTORS IN PARALLEL AND AN ADDITIONAL CIRCUIT CONNECTING THE OTHER PUMP TO THE ASSEMBLAGES, SAID TWO LAST MENTIONED CIRCUITS BEING NORMALLY DISCONNECTED FROM EACH OTHER, VALVE MEANS FOR CONTROLLING THE DIRECTION OF FLOW OF PRESSURE FLUID IN SAID ONE CIRCUIT OT THE HYDRAULIC MOTORS AND IN THE ADDITIONAL CIRCUIT TO THE ASSEMBLAGES, RESPECTIVELY, AND ADDITIONAL VALVE MEANS FOR DIVERTING THE PRESSURE FLUID FROM THE ADDITIONAL CIRCUIT TO THE PRESSURE SIDE OF SAID ONE CIRCUIT.
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) | 1966-07-22 | 1967-01-21 | 1967-07-23 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1970-07-22 | 1971-01-21 | 1971-07-23 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1974-07-22 | 1975-01-21 | 1975-07-23 | $7700.00 | Window Closed / Lapsed |