US3679018A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Dual station transmission control
Assignee: Ingersoll Rand Co
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Filing: 1970-07-07
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Granted: 1972-07-25
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Expires: 1990-07-07
Abstract
Abstract A means for controlling a pair of transmissions on a vehicle having dual power trains from either one of a pair of operator stations. A station selector valve directs air pressure to a selected valve means connected with slave cylinders for conditioning the power trains for direction of travel and speed range. The selected valve means is movable to properly direct the air pressure by a cam means selectively positionable by an operator.
Inventors
- 👤 Robert G Luft
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 16:24
CPC Classifications
B; B60; B60K; B60K20/00; B62; B62D; B62D49/00; B62D49/06; B62D49/0692; F; F16; F16H; F16H59/00; F16H59/02; F16H59/08; F16H2059/082; F16H2059/088; Y; Y10; Y10T; Y10T74/00; Y10T74/19; Y10T74/19023; Y10T74/19074; Y10T74/19079
Claims Analysis
Total Claims: 10
Claim 1
Independent Claim
114 words
In a vehicle having a pair of drive trains, each of which includes a forward-reverse and speed range transmission; a means for controlling said drive trains comprising: first operator means for determining the direction of travel of said transmission; first slave cylinder means operatively connected with said first operator means; second operator means for determining the speed range of said transmissions; second slave cylinder means operatively connected with said second operator means; first valve means connected with each of said slave cylinder means; and first cam means movable to shift said first valve means in order to condition each of the drive trains for the same speed range and the desired direction of travel.
Claim 2
Dependent Claim
114 words
In a vehicle having a pair of drive trains, each of which includes a forward-reverse and speed range transmission; a means for controlling said drive trains comprising: first operator means for determining the direction of travel of said transmission; first slave cylinder means operatively connected with said first operator means; second operator means for determining the speed range of said transmissions; second slave cylinder means operatively connected with said second operator means; first valve means connected with each of said slave cylinder means; and first cam means movable to shift said first valve means in order to condition each of the drive trains for the same speed range and the desired direction of travel.
Claim 3
Dependent Claim
58 words
The invention according to claim 1, and further comprising: second valve means connected with said slave cylinder means; a selector valve means for selectively directing fluid pressure to one of said valve means; check valve means for isolating said first valve means from said slave cylinder means, and second cam means movable to shift said second valve means.
Claim 4
Dependent Claim
87 words
In a vehicle having a pair of drive trains, each of which includes forward-reverse and speed change transmissions; a means for controlling and coordinating the drive trains comprising: slave cylinder means operatively connected with said transmissions; valve means for selectively directing fluid pressure to said slave cylinder means; cam means engageable with the valve means for shifting the latter to condition simultaneously one of said drive trains for forward drive and the other to reverse drive and for conditioning both drive trains for the same speed ratio.
Claim 5
Dependent Claim
87 words
In a vehicle having a pair of drive trains, each of which includes forward-reverse and speed change transmissions; a means for controlling and coordinating the drive trains comprising: slave cylinder means operatively connected with said transmissions; valve means for selectively directing fluid pressure to said slave cylinder means; cam means engageable with the valve means for shifting the latter to condition simultaneously one of said drive trains for forward drive and the other to reverse drive and for conditioning both drive trains for the same speed ratio.
Claim 6
Dependent Claim
81 words
A means for controlling a pair of transmissions driven by opposite rotating engines and having forward and reverse, and speed change capability comprising: slave cylinder means connected with the transmissions; valve means for selectively directing fluid pressure to the slave cylinder means; cam means engageable with the valve means for shifting said valve means to condition one transmission for forward drive and to condition the other transmission for reverse drive and to simultaneously condition both transmissions for the same speed range.
Claim 7
Dependent Claim
81 words
A means for controlling a pair of transmissions driven by opposite rotating engines and having forward and reverse, and speed change capability comprising: slave cylinder means connected with the transmissions; valve means for selectively directing fluid pressure to the slave cylinder means; cam means engageable with the valve means for shifting said valve means to condition one transmission for forward drive and to condition the other transmission for reverse drive and to simultaneously condition both transmissions for the same speed range.
Claim 8
Dependent Claim
168 words
In a vehicle having a pair of drive trains independently connected between opposite rotating engines and separate axles, each drive train including a speed-change transmission and a forward-reverse transmission; a means for controlling and coordinating said drive trains comprising: a first slave cylinder operatively connected with one speed change transmission; a second slave cylinder operatively connected with the other speed change transmission; speed range valve means connected in parallel with said first and second slave cylinders so that actuation of said speed valve means cause both speed range transmissions to be in the same speed range; a third slave cylinder operatively connected to one forward-reverse transmission; a fourth slave cylinder operatively connected to the other forward-reverse transmission; direction of travel valve means communicating with said third and fourth salve cylinders so that actuation of said direction valve means causes said forward-reverse transmissions to be conditioned for opposite directions; and cam means engageable by said speed range and direction of travel valve means for selectively shifting said valve means.
Claim 9
Dependent Claim
168 words
In a vehicle having a pair of drive trains independently connected between opposite rotating engines and separate axles, each drive train including a speed-change transmission and a forward-reverse transmission; a means for controlling and coordinating said drive trains comprising: a first slave cylinder operatively connected with one speed change transmission; a second slave cylinder operatively connected with the other speed change transmission; speed range valve means connected in parallel with said first and second slave cylinders so that actuation of said speed valve means cause both speed range transmissions to be in the same speed range; a third slave cylinder operatively connected to one forward-reverse transmission; a fourth slave cylinder operatively connected to the other forward-reverse transmission; direction of travel valve means communicating with said third and fourth salve cylinders so that actuation of said direction valve means causes said forward-reverse transmissions to be conditioned for opposite directions; and cam means engageable by said speed range and direction of travel valve means for selectively shifting said valve means.
Claim 10
Dependent Claim
65 words
The invention according to claim 5, and further comprising: a rear station valve means communicating with said third and fourth slave cylinders; and a selector valve means for isolating saId direction and speed valve means while simultaneously directing fluid pressure to said rear station valve means and to said first and second slave cylinders to condition both speed range transmissions for a common speed range.
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) | 1975-07-25 | 1976-01-24 | 1976-07-25 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-07-25 | 1980-01-24 | 1980-07-25 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-07-25 | 1984-01-24 | 1984-07-25 | $7700.00 | Window Closed / Lapsed |