Patent US3587784A successfully refreshed from Google Patents.
US3587784A
Expired / Lapsed
US
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Telescopic load booster
Assignee: Hunters Manufacturing Co Inc
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Filing: 1968-09-26
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Granted: 1971-06-28
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Expires: 1988-09-26
Abstract
Abstract A HYDRAULICALLY OPERATED, TELECOPIC FORKLIFT HAVING A MANIFOLD IN THE HYDRAULIC CIRCUIT INTERCONNECTING THE PUMP, THE CYLINDER FOR ACTUATING THE LIFT CARRIAGE AND THE CYLINDER FOR ACTUATING THE TELESCOPIC MAST. THE MANIFOLD INCLUDES A FLOW-RESTRICTING ORIFICE LEADING TO THE MAST CYLINDER AND THIS ORIFICE ESTABLISHES A PRESSURE DIFFERENTIAL BETWEEN THE PRESSURES AT WHICH THE TWO CYLINDERS ARE ACTUATED THEREBY ACHIEVING A CONTROLLED SEQUENTIAL OPERATION BOTH IN LIFTING AND LOWERING A LOAD.
Inventors
- 👤 Raymond Carl Tait
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-07 13:46
CPC Classifications
B; B66; B66F; B66F9/00; B66F9/06; B66F9/075; B66F9/20; B66F9/22
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1974-06-27 | 1974-12-27 | 1975-06-28 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-06-27 | 1978-12-27 | 1979-06-28 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-06-27 | 1982-12-27 | 1983-06-28 | $7700.00 | Window Closed / Lapsed |