US3213763A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Hydraulic power transmissions and the control of hydraulic motors
Assignee: Individual
•
Filing: 1963-05-03
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Granted: 1965-10-26
•
Expires: 1983-05-03
Abstract
No abstract record available.
Inventors
- 👤 Pearson Robert Colin
- 👤 Burrett Thomas Mark
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 03:22
CPC Classifications
F; F16; F16H; F16H61/00; F16H61/38; F16H61/40; F16H61/46; F16H61/47; B; B66; B66C; B66C13/00; B66C13/18; B66D; B66D1/00; B66D1/02; B66D1/08; E; E02; E02F; E02F9/00; E02F9/20; E02F9/22; E02F9/2246; F16H39/00; F16H39/02; F16H61/472; B66C2700/00; B66C2700/06; B66D2700/00; B66D2700/01; B66D2700/0125; B66D2700/0133; F16H61/42; F16H61/423
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
108 words
A HYDRAULIC DRIVE COMPRISING: SOURCE OF PRESSURE FLUID OF SUBSTANTIALLY CONSTANT PRESSURE; A HYDRAULIC MOTOR OF CONTINUOUSLY VARIABLE DISPLACEMENT, SAID MOTOR INCLUDING A MOVABLE CONTROL MEMBER THE POSITION OF WHICH CONTROLS THE MAGNITUDE OF SAID DISPLACEMENT; TACHOMETER PUMP MEANS DRIVEN BY SAID MOTOR; MANUALLY CONTROLLABLE MEANS FOR OBTAINING A VARIABLE FLOW OF PRESSURE FLUID INDEPENDENTLY OF SAID TACHOMETER PUMP MEANS; PRESSURE SENSITIVE MEANS CONNECTED TO VARY THE POSITION OF SAID MOVABLE CONTROL MEMBER; A FIRST HYDRAULIC CIRCUIT CONNECTING SAID MOTOR TO SAID SOURCE FOR OPERATION THEREBY; AND A SECOND HYDRAULIC CIRCUIT CONNECTING SAID TACHOMETER PUMPS M EANS AND SAID MANUALLY CONTROLLABLE MEANS DIFFERENTIALLY TO SAID PRESSURE SENSITIVE MEANS.
Claim 2
Dependent Claim
108 words
A HYDRAULIC DRIVE COMPRISING: SOURCE OF PRESSURE FLUID OF SUBSTANTIALLY CONSTANT PRESSURE; A HYDRAULIC MOTOR OF CONTINUOUSLY VARIABLE DISPLACEMENT, SAID MOTOR INCLUDING A MOVABLE CONTROL MEMBER THE POSITION OF WHICH CONTROLS THE MAGNITUDE OF SAID DISPLACEMENT; TACHOMETER PUMP MEANS DRIVEN BY SAID MOTOR; MANUALLY CONTROLLABLE MEANS FOR OBTAINING A VARIABLE FLOW OF PRESSURE FLUID INDEPENDENTLY OF SAID TACHOMETER PUMP MEANS; PRESSURE SENSITIVE MEANS CONNECTED TO VARY THE POSITION OF SAID MOVABLE CONTROL MEMBER; A FIRST HYDRAULIC CIRCUIT CONNECTING SAID MOTOR TO SAID SOURCE FOR OPERATION THEREBY; AND A SECOND HYDRAULIC CIRCUIT CONNECTING SAID TACHOMETER PUMPS M EANS AND SAID MANUALLY CONTROLLABLE MEANS DIFFERENTIALLY TO SAID PRESSURE SENSITIVE MEANS.
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) | 1968-10-25 | 1969-04-26 | 1969-10-26 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1972-10-25 | 1973-04-26 | 1973-10-26 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1976-10-25 | 1977-04-26 | 1977-10-26 | $7700.00 | Window Closed / Lapsed |