US3091976A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Hydraulic controls for power transmission
Assignee: Caterpillar Inc
•
Filing: 1959-04-28
•
Granted: 1963-06-04
•
Expires: 1979-04-28
Abstract
No abstract record available.
Inventors
- 👤 Gordon W Johnson
- 👤 Lichtenstein Leroy
- 👤 Charles A Ramsel
- 👤 Gerald D Rohweder
- 👤 Frank H Winters
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 11:38
CPC Classifications
F; F16; F16H; F16H61/00; F16H61/16; F16H61/02; F16H61/0262; F16H2716/00; F16H2716/04; F16H2716/06; Y; Y10; Y10T; Y10T74/00; Y10T74/19; Y10T74/19219; Y10T74/19377; Y10T74/19414; Y10T74/19419; Y10T74/19423; Y10T74/19428; Y10T74/19433
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
119 words
IN CONTROLS FOR A TRANSMISION HAVING A PLURALITY OF SPEED RATIO TRAINS AND FORWARD AND REVERSE DIRECTION TRAINS, WHEREIN A SEPARATE ACTUATOR CONTOLS EACH TRAIN AND A FLUID MOTOR IS EMPLOYED TO ENERGIZE EACH ACTUATOR, A SOURCE OF FLUID UNDER PRESSURE, AND MEANS TO DIRECT PRESSURE FROM SAID SOURCE SELECTIVELY TO SAID FLUID MOTORS AND THEREBY TO SELECT THE TRAINS TO BE EMPLOYED FOR TRANSMISSION OF POWER, THE IMPROVEMENT WHICH COMPRISES, A FIRST SELECTOR VALVE IN SAID PRESSURE DIRECTING MEANS ASSOCIATED WITH THE SPEED RATIO TRAINS, A SECOND SELECTOR VALVE ASSOCIATED WITH THE DIRECTION TRAINS, AND MEANS TO PREVENT APPLICATION OF PRESSURE THROUGH SAID SECOND SELECTOR VALVE UNTIL PRESURE HAS REACHED THE FLUID MOTOR OF A SPEED RATIO TRAIN.
Claim 2
Dependent Claim
119 words
IN CONTROLS FOR A TRANSMISION HAVING A PLURALITY OF SPEED RATIO TRAINS AND FORWARD AND REVERSE DIRECTION TRAINS, WHEREIN A SEPARATE ACTUATOR CONTOLS EACH TRAIN AND A FLUID MOTOR IS EMPLOYED TO ENERGIZE EACH ACTUATOR, A SOURCE OF FLUID UNDER PRESSURE, AND MEANS TO DIRECT PRESSURE FROM SAID SOURCE SELECTIVELY TO SAID FLUID MOTORS AND THEREBY TO SELECT THE TRAINS TO BE EMPLOYED FOR TRANSMISSION OF POWER, THE IMPROVEMENT WHICH COMPRISES, A FIRST SELECTOR VALVE IN SAID PRESSURE DIRECTING MEANS ASSOCIATED WITH THE SPEED RATIO TRAINS, A SECOND SELECTOR VALVE ASSOCIATED WITH THE DIRECTION TRAINS, AND MEANS TO PREVENT APPLICATION OF PRESSURE THROUGH SAID SECOND SELECTOR VALVE UNTIL PRESURE HAS REACHED THE FLUID MOTOR OF A SPEED RATIO TRAIN.
References Cited (Backward Citations)
US2761328A
Cited
US2756616A
Cited
US2766639A
Cited
US2843213A
Cited
US2835136A
Cited
US2887198A
Cited
US2917936A
Cited
US2943500A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1966-06-03 | 1966-12-03 | 1967-06-04 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1970-06-03 | 1970-12-03 | 1971-06-04 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1974-06-03 | 1974-12-03 | 1975-06-04 | $7700.00 | Window Closed / Lapsed |