US3085403A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Hydraulic power transmission systems
Assignee: National Research Development Corp UK
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Filing: 1961-07-05
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Granted: 1963-04-16
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Expires: 1981-07-05
Abstract
No abstract record available.
Inventors
- 👤 Hamblin Henry Joel
- 👤 Nation Harry James
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 03:12
CPC Classifications
F; F16; F16H; F16H61/00; F16H61/38; F16H61/40; F16H61/46; F16H61/44; F16H61/456
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
216 words
A HYDRAULIC POWER TRANSMISSION SYSTEM COMPRISING A PLURALITY OF HYDRAULIC MOTORS, MOTIVE FLUID SUPPLY MEANS COMMON TO ALL SAID HYDRAULIC MOTORS, INDIVIDUAL MOTIVE FLUID SUPPLY LINES FROM SAID COMMON MOTIVE FLUID SUPPLY MEANS TO EACH OF SAID HYDRAULIC MOTORS CONNECTING SAID HYDRAULIC MOTORS IN PARALLEL, A THROTTLE VALVE IN EACH SAID SUPPLY LINE, A PRESSURE-SENSITIVE ACTUATING MEMBER FOR EACH SAID THROTTLE VALVE, A PLURALITY OF AUXILIARY PUMPS EQUAL IN NUMBER TO SAID HYDRAULIC MOTORS, A DRIVING CONNECTION FROM EACH OF SAID HYDRAULIC MOTORS TO A DIFFERENT ONE OF SAID AUXILIARY PUMPS TO DRIVE EACH OF SAID AUXILIARY PUMPS AT A SPEED DEPENDENT UPON THE SPEED OF ITS RESPECTIVE HYDRAULIC MOTOR, EACH OF SAID AUXILIARY PUMPS HAVING A HYDRAULIC FLUID INLET AND A HYDRAULIC FLUID OUTLET, A PLURALITY OF CONDUIT MEANS CONNECTING SAID AUXILIARY PUMPS IN A HYDRAULIC CIRCUIT WITH SAID FLUID OUTLET OF ONE AUXILIARY PUMP CONNECTED TO SAID FLUID INLET OF THE NEXT AUXILIARY PUMP IN THE CIRCUIT AND SO ON AROUND THE CIRCUIT, EACH OF SAID CONDUIT MEANS BEING CAPABLE OF SUSTAINING INTERNAL PRESSURE, AND A CONNECTION FROM EACH OF SAID CONDUIT MEANS TO THE PRESSURE-SENSITIVE ACTUATING MEMBER OF THE THROTTLE VALVE IN THE SUPPLY LINE TO THE HYDRAULIC MOTOR WHICH DRIVES THE AUXILIARY PUMP WHOSE OUTLET IS CONNECTED TO THE RESPECTIVE CONDUIT MEANS.
Claim 2
Dependent Claim
216 words
A HYDRAULIC POWER TRANSMISSION SYSTEM COMPRISING A PLURALITY OF HYDRAULIC MOTORS, MOTIVE FLUID SUPPLY MEANS COMMON TO ALL SAID HYDRAULIC MOTORS, INDIVIDUAL MOTIVE FLUID SUPPLY LINES FROM SAID COMMON MOTIVE FLUID SUPPLY MEANS TO EACH OF SAID HYDRAULIC MOTORS CONNECTING SAID HYDRAULIC MOTORS IN PARALLEL, A THROTTLE VALVE IN EACH SAID SUPPLY LINE, A PRESSURE-SENSITIVE ACTUATING MEMBER FOR EACH SAID THROTTLE VALVE, A PLURALITY OF AUXILIARY PUMPS EQUAL IN NUMBER TO SAID HYDRAULIC MOTORS, A DRIVING CONNECTION FROM EACH OF SAID HYDRAULIC MOTORS TO A DIFFERENT ONE OF SAID AUXILIARY PUMPS TO DRIVE EACH OF SAID AUXILIARY PUMPS AT A SPEED DEPENDENT UPON THE SPEED OF ITS RESPECTIVE HYDRAULIC MOTOR, EACH OF SAID AUXILIARY PUMPS HAVING A HYDRAULIC FLUID INLET AND A HYDRAULIC FLUID OUTLET, A PLURALITY OF CONDUIT MEANS CONNECTING SAID AUXILIARY PUMPS IN A HYDRAULIC CIRCUIT WITH SAID FLUID OUTLET OF ONE AUXILIARY PUMP CONNECTED TO SAID FLUID INLET OF THE NEXT AUXILIARY PUMP IN THE CIRCUIT AND SO ON AROUND THE CIRCUIT, EACH OF SAID CONDUIT MEANS BEING CAPABLE OF SUSTAINING INTERNAL PRESSURE, AND A CONNECTION FROM EACH OF SAID CONDUIT MEANS TO THE PRESSURE-SENSITIVE ACTUATING MEMBER OF THE THROTTLE VALVE IN THE SUPPLY LINE TO THE HYDRAULIC MOTOR WHICH DRIVES THE AUXILIARY PUMP WHOSE OUTLET IS CONNECTED TO THE RESPECTIVE CONDUIT MEANS.
References Cited (Backward Citations)
US1725489A
Cited
US2846849A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1966-04-15 | 1966-10-15 | 1967-04-16 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1970-04-15 | 1970-10-15 | 1971-04-16 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1974-04-15 | 1974-10-15 | 1975-04-16 | $7700.00 | Window Closed / Lapsed |