US3175354A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Hydraulic transmission systems
Assignee: Council of Scientific and Industrial Research
•
Filing: 1963-03-01
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Granted: 1965-03-30
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Expires: 1983-03-01
Abstract
No abstract record available.
Inventors
- 👤 Firth Donald
- 👤 Hancock Roger Harvey Yorke
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 23:02
CPC Classifications
F; F16; F16H; F16H61/00; F16H61/38; F16H61/40; F16H61/46; B; B60; B60K; B60K17/00; B60K17/04; B60K17/10; C; C07; C07D; C07D207/00; C07D207/02; C07D207/30; C07D207/32; C07D207/33; C07D207/337; F16H61/47; Y; Y10; Y10S; Y10S60/00; Y10S60/912
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
99 words
A HYDRAULIC TRANSMISSION SYSTEM FOR INTERCONNECTING A PRIME MOVER AND A LOAD COMPRISING A VARIABLE STROKE POSITIVE DISPLACEMENT PUMP ADAPTED TO BE DRIVEN BY SAID PRIME MOVER; A POSITIVE DISPLACEMENT HYDRAULIC MOTOR ADAPTED TO DRIVE SAID LOAD; HYDRAULIC FLUID CONNECTIONS BETWEEN SAID PUMP AND SAID MOTOR; AN ADJUSTABLE HYDRAULIC RETARD THROTTLE VALVE INTERPOSED IN AN EXHAUST CIRCUIT OF SAID MOTOR; A DRIVE-OPERATED SPEED CONTROLLER FO SAID PRIME MOVER, AND MEANS INTERCONNECTING SAID SPEED CONTROLLER AND SAID THROTTLE VALVE FOR ADJUSTING THE THROTTLE ACTION OF SAID HYDRAULIC RETARD VALVE WHEN SAID SPEED CONTROLLER IS MOVED TO THE LOWER SPEED SETTING.
Claim 2
Dependent Claim
99 words
A HYDRAULIC TRANSMISSION SYSTEM FOR INTERCONNECTING A PRIME MOVER AND A LOAD COMPRISING A VARIABLE STROKE POSITIVE DISPLACEMENT PUMP ADAPTED TO BE DRIVEN BY SAID PRIME MOVER; A POSITIVE DISPLACEMENT HYDRAULIC MOTOR ADAPTED TO DRIVE SAID LOAD; HYDRAULIC FLUID CONNECTIONS BETWEEN SAID PUMP AND SAID MOTOR; AN ADJUSTABLE HYDRAULIC RETARD THROTTLE VALVE INTERPOSED IN AN EXHAUST CIRCUIT OF SAID MOTOR; A DRIVE-OPERATED SPEED CONTROLLER FO SAID PRIME MOVER, AND MEANS INTERCONNECTING SAID SPEED CONTROLLER AND SAID THROTTLE VALVE FOR ADJUSTING THE THROTTLE ACTION OF SAID HYDRAULIC RETARD VALVE WHEN SAID SPEED CONTROLLER IS MOVED TO THE LOWER SPEED SETTING.
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) | 1968-03-29 | 1968-09-28 | 1969-03-30 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1972-03-29 | 1972-09-28 | 1973-03-30 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1976-03-29 | 1976-09-28 | 1977-03-30 | $7700.00 | Window Closed / Lapsed |