Patent US3303647A successfully refreshed from Google Patents.
US3303647A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Hydraulically operated power system
Assignee: Komatsu Ltd
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Filing: 1965-06-03
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Granted: 1967-02-14
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Expires: 1985-06-03
Abstract
No abstract record available.
Inventors
- 👤 Futamata Masayuki
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-06 17:42
CPC Classifications
F; F16; F16H; F16H61/00; F16H61/38; F16H61/40; F16H61/4078; F16H61/4139; F16H61/4043; Y; Y10; Y10S; Y10S60/00; Y10S60/911
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
203 words
A HYDRAULICALLY OPERATED POWER SYSTEM COMPRISING: A PRIME MOVER; A HYDRAULIC PUMP DRIVEN BY SAID PRIME MOVER; A HYDRAULIC MOTOR; A SUPPLY LINE FOR SUPPLYING HYDRAULIC FLUID FROM SAID PUMP TO SAID MOTOR; A RETURN LINE FOR RETURNING THE HYDRAULIC FLUID FROM SAID MOTOR TO SAID PUMP; BRANCH LINES BRANCHING FROM SAID SUPPLY AND RETURN LINES AND COMMUNICATING WITH A HYDRAULIC FLUID RESERVOIR; CHECK VALVES, AND A RELIEF VALVE HAVING A PILOT VALVE PROVIDED WITH A VENT PORT, INSERTED IN SAID BRANCH LINES; A CHANGE-OVER VALVE FOR CONTROLLING THE COMMUNICATION BETWEEN THE TWO SIDES OF SAID RELIEF VALVE; AND MEANS TO OPERATE SAID CHANGE-OVER VALVE; SAID RELIEF VALVE BEING ADAPTED TO PERMIT FLOW OF HYDRAULIC FLUID FROM SAID SUPPLY LINE THROUGH SAID BRANCH LINES TO SAID RETURN LINE, IN ORDER TO BYPASS FLUID AROUND SAID MOTOR, WHEN SAID CHANGE-OVER VALVE IS OPENED, WHEREBY SAID MOTOR, IS RENDERED FREE TO STOP OR ROTATE IRRESPECTIVE OF THE ROTATION OF SAID PRIME MOVER, AND BEING ADAPTED TO BLOCK FLUID FLOW FROM SAID SUPPLY LINE THROUGH SAID BRANCH LINES TO SAID RETURN LINE, FOR SUPPLYING ALL THE FLUID DELIVERED FROM SAID PUMP TO SAID MOTOR IN ORDER TO DRIVE SAID MOTOR, WHEN SAID CHANGE-OVER VALVE IS CLOSED.
Claim 2
Dependent Claim
203 words
A HYDRAULICALLY OPERATED POWER SYSTEM COMPRISING: A PRIME MOVER; A HYDRAULIC PUMP DRIVEN BY SAID PRIME MOVER; A HYDRAULIC MOTOR; A SUPPLY LINE FOR SUPPLYING HYDRAULIC FLUID FROM SAID PUMP TO SAID MOTOR; A RETURN LINE FOR RETURNING THE HYDRAULIC FLUID FROM SAID MOTOR TO SAID PUMP; BRANCH LINES BRANCHING FROM SAID SUPPLY AND RETURN LINES AND COMMUNICATING WITH A HYDRAULIC FLUID RESERVOIR; CHECK VALVES, AND A RELIEF VALVE HAVING A PILOT VALVE PROVIDED WITH A VENT PORT, INSERTED IN SAID BRANCH LINES; A CHANGE-OVER VALVE FOR CONTROLLING THE COMMUNICATION BETWEEN THE TWO SIDES OF SAID RELIEF VALVE; AND MEANS TO OPERATE SAID CHANGE-OVER VALVE; SAID RELIEF VALVE BEING ADAPTED TO PERMIT FLOW OF HYDRAULIC FLUID FROM SAID SUPPLY LINE THROUGH SAID BRANCH LINES TO SAID RETURN LINE, IN ORDER TO BYPASS FLUID AROUND SAID MOTOR, WHEN SAID CHANGE-OVER VALVE IS OPENED, WHEREBY SAID MOTOR, IS RENDERED FREE TO STOP OR ROTATE IRRESPECTIVE OF THE ROTATION OF SAID PRIME MOVER, AND BEING ADAPTED TO BLOCK FLUID FLOW FROM SAID SUPPLY LINE THROUGH SAID BRANCH LINES TO SAID RETURN LINE, FOR SUPPLYING ALL THE FLUID DELIVERED FROM SAID PUMP TO SAID MOTOR IN ORDER TO DRIVE SAID MOTOR, WHEN SAID CHANGE-OVER VALVE IS CLOSED.
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) | 1970-02-13 | 1970-08-15 | 1971-02-14 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1974-02-13 | 1974-08-15 | 1975-02-14 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1978-02-13 | 1978-08-15 | 1979-02-14 | $7700.00 | Window Closed / Lapsed |