US3304633A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Hydraulic circuit
Assignee: Caterpillar Inc
•
Filing: 1964-05-08
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Granted: 1967-02-21
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Expires: 1984-05-08
Abstract
No abstract record available.
Inventors
- 👤 Allyn J Hein
- 👤 James E Scheidt
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 18:25
CPC Classifications
E; E02; E02F; E02F3/00; E02F3/04; E02F3/64; E02F3/65; E02F3/651; E02F3/6409; E02F3/6436; E02F3/6454; E02F3/6481; E02F3/652; E02F3/654; E02F3/656; E02F3/657; F; F15; F15B; F15B11/00; F15B11/16; F15B11/20; Y; Y10; Y10S; Y10S280/00; Y10S280/09
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
122 words
A HYDRAULIC CONTROL CIRCUIT FOR SELECTIVELY INDIVIDUALLY OPERATING AT LEAST TWO HYDRAULIC MOTORS COMPRISING: A HYDRAULIC CIRCUIT FOR ACTUATING SAID MOTORS, SELECTIVELY OPERABLE CONTROL MEANS FOR EFFECTING ACTUATION OF SAID MOTORS IN A DESIRED SEQUENCE, MEANS FOR SUPPLYING FLUID UNDER PRESSURE TO SAID CIRCUIT, SWITCH VALVE MEANS BEING OPERABLE TO EFFECT OPERATION OF EITHER ONE OF SAID MOTORS, A HYDRAULIC PILOT PRESSURE CIRCUIT FOR ACTUATING SAID SWITCH VALVE MEANS TO PERMIT PRESSURE FLUID ENERGIZATION OF ONE OF SAID MOTORS, AND CONTROL VALVE MEANS IN COMMUNICATION WITH SAID MOTOR ACTUATING HYDRAULIC CIRCUIT AND SAID PILOT PRESSURE CIRCUIT FOR RENDERING SAID PILOT PRESSURE CIRCUIT INEFFECTIVE TO OPERATE SAID SWITCH VALVE MEANS IN ORDER TO PERMIT PRESSURE FLUID ENERGIZATION OF THE OTHER OF SAID MOTORS.
Claim 2
Dependent Claim
122 words
A HYDRAULIC CONTROL CIRCUIT FOR SELECTIVELY INDIVIDUALLY OPERATING AT LEAST TWO HYDRAULIC MOTORS COMPRISING: A HYDRAULIC CIRCUIT FOR ACTUATING SAID MOTORS, SELECTIVELY OPERABLE CONTROL MEANS FOR EFFECTING ACTUATION OF SAID MOTORS IN A DESIRED SEQUENCE, MEANS FOR SUPPLYING FLUID UNDER PRESSURE TO SAID CIRCUIT, SWITCH VALVE MEANS BEING OPERABLE TO EFFECT OPERATION OF EITHER ONE OF SAID MOTORS, A HYDRAULIC PILOT PRESSURE CIRCUIT FOR ACTUATING SAID SWITCH VALVE MEANS TO PERMIT PRESSURE FLUID ENERGIZATION OF ONE OF SAID MOTORS, AND CONTROL VALVE MEANS IN COMMUNICATION WITH SAID MOTOR ACTUATING HYDRAULIC CIRCUIT AND SAID PILOT PRESSURE CIRCUIT FOR RENDERING SAID PILOT PRESSURE CIRCUIT INEFFECTIVE TO OPERATE SAID SWITCH VALVE MEANS IN ORDER TO PERMIT PRESSURE FLUID ENERGIZATION OF THE OTHER OF SAID MOTORS.
References Cited (Backward Citations)
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Cited
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US2745562A
Cited
US2711633A
Cited
US2928482A
Cited
US2946144A
Cited
US3180514A
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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) | 1970-02-20 | 1970-08-22 | 1971-02-21 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1974-02-20 | 1974-08-22 | 1975-02-21 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1978-02-20 | 1978-08-22 | 1979-02-21 | $7700.00 | Window Closed / Lapsed |