US3151718A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Hydraulic control
Assignee: Allis Chalmers Corp
•
Filing: 1961-09-26
•
Granted: 1964-10-06
•
Expires: 1981-09-26
Abstract
No abstract record available.
Inventors
- 👤 Paul C Temple
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 07:49
CPC Classifications
F; F16; F16H; F16H59/00; F16H59/02; F16H59/04; F16H59/045; F15; F15B; F15B11/00; F15B11/02; F16H47/00; F16H47/06; F15B2211/00; F15B2211/30; F15B2211/305; F15B2211/30505; F15B2211/30525; F15B2211/32; F15B2211/321; F15B2211/324; F15B2211/50; F15B2211/505; F15B2211/50509; F15B2211/50518; F15B2211/515; F15B2211/5151; F15B2211/55; F15B2211/60; F15B2211/61; F15B2211/611; F15B2211/62; F15B2211/70; F15B2211/71; F15B2211/76; Y; Y10; Y10S; Y10S74/00; Y10S74/02; Y10T; Y10T137/00; Y10T137/7722; Y10T137/7837; Y10T137/7838; Y10T137/8593; Y10T137/86493; Y10T137/86501; Y10T137/86574; Y10T137/86638; Y10T137/86646; Y10T137/86654; Y10T137/86662; Y10T74/00; Y10T74/19; Y10T74/19149; Y10T74/19158
Claims Analysis
Total Claims: 1
Claim 1
Independent Claim
322 words
A HYDRAULIC SYSTEM FOR A TORQUE CONVERTER AND A TRANSMISSION OF THE TYPE HAVING A PAIR OF HYDRAULICALLY ACTUATED FRICTION CLUTCHES, COMPRISING: A SOURCE OF PRESSURE FLUID; A FLUID RESERVOIR; A CONTROL VALVE HOUSING HAVING FIRST, SECOND AND THIRD FLUID CHAMBERS, AN INLET PORT INTERCONNECTING SAID SOURCE OF PRESSURE FLUID AND SAID FIRST CHAMBER, AND A RESERVOIR PORT IN FLUID COMMUNICATION WITH SAID RESERVOIR; A FIRST RELIEF VALVE IN SAID HOUSING BETWEEN SAID FIRST AND SECOND CHAMBERS PERMITTING FLUID FLOW FROM SAID FIRST CHAMBER TO SAID SECOND CHAMBER WHEN THE FLUID PRESSURE IN SAID FIRST CHAMBER EXCEEDS A FIRST PREDETERMINED VALUE; A SECOND RELIEF VALVE IN SAID HOUSING BETWEEN SAID SECOND AND THIRD CHAMBERS PERMITTING FLUID FLOW FROM SAID SECOND CHAMBER TO SAID THIRD CHAMBER WHEN THE FLUID PRESSURE IN SAID SECOND CHAMBER EXCEEDS A SECOND PREDETERMINED VALUE; A THIRD PRESSURE RELIEF VALVE IN SAID HOUSING BETWEEN SAID THIRD CHAMBER AND SAID RESERVOIR PORT PERMITTING FLUID FLOW FROM SAID THIRD CHAMBER TO SAID RESERVOIR PORT WHEN THE FLUID PRESSURE IN SAID THIRD CHAMBER EXCEEDS A THIRD PREDETERMINED VALUE; PASSAGE MEANS ESTABLISHING FLUID COMMUNICATION BETWEEN SAID SECOND CHAMBER AND SAID TORQUE CONVERTER FOR SUPPLYING FLUID TO THE LATTER; A PAIR OF CLUTCH SUPPLY PASSAGES IN SAID HOUSING HAVING FLUID COMMUNICATION WITH SAID CLUTCHES, RESPECTIVELY; AND A SHIFTABLE VALVE MEMBER IN SAID HOUSING HAVING FIRST AND SECOND POSITIONS OF ADJUSTMENT, SAID VALVE MEMBER IN ITS FIRST POSITION OF ADJUSTMENT PLACING ONE OF SAID CLUTCH SUPPLY PASSAGES IN FLUID COMMUNICATION WITH SAID FIRST CHAMBER AND PLACING THE OTHER OF SAID CLUTCH SUPPLY PASSAGES IN FLUID COMMUNICATION WITH SAID THIRD CHAMBER, SAID VALVE MEMBER IN ITS SECOND POSITION OF ADJUSTMENT PLACING SAID OTHER CLUTCH SUPPLY PASSAGES IN FLUID COMMUNICATION WITH SAID FIRST CHAMBER AND PLACING SAID ONE CLUTCH SUPPLY PASSAGE IN FLUID COMMUNICATION WITH SAID THIRD CHAMBER, SAID SECOND VALUE BEING LESS THAN SAID FIRST VALUE AND SAID THIRD VALUE BEING LESS THAN SAID SECOND VALUE.
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) | 1967-10-06 | 1968-04-06 | 1968-10-06 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1971-10-06 | 1972-04-06 | 1972-10-06 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1975-10-06 | 1976-04-06 | 1976-10-06 | $7700.00 | Window Closed / Lapsed |