US3874254A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Automatic remote control system for hydraulic torque converter transmissions
Assignee: SRM Hydromekanik AB
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Filing: 1973-09-28
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Granted: 1975-04-01
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Expires: 1993-09-28
Abstract
Abstract A remote control system for a vehicle driven by a hydraulic torque converter of the type having a releasable torque transmitting member. Either fluid operated or electrical operating means are provided for sensing the ratio of the speed of the torque converter output shaft to the speed of the torque converter input shaft and controlling fluid lines for connecting and disconnecting the releasable member and/or the brakes assoicated with the torque converter guide member. A remote control valve and throttle operated by the driver of the vehicle operates in conjunction with the operating means to determine the direction and mode of operation of the transmission.
Inventors
- 👤 Karl Gustav Ahlen
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 20:34
CPC Classifications
F; F16; F16H; F16H61/00; F16H61/02; F16H61/0262; F16H61/0274; F16H47/00; F16H47/06; F16H47/08; F16H47/085; F16H59/00; F16H59/02; F16H59/08; F16H2059/082; F16H2059/088
Claims Analysis
Total Claims: 17
Claim 1
Independent Claim
229 words
A remote control system for a transmission adapted for use in a vehicle and including a torque converter of the type having a pump member connected to an input shaft, a guide member and a turbine member connected to an output shaft, and wherein one of the pump or turbine members is releasable from its respective shaft, and including brake means for controlling the speed of rotation of the guide member, and a forward/reverse gear, said system comprising: sensing means for sensing the ratio n2/n1 which is the rotational speed of the output shaft to the rotational speed of the input shaft, pressure means for pressurizing fluid and selectively transmitting said pressurized fluid to main valve means for connecting and disconnecting said releasable member and said guide member brake means, operating means responsive to the sensing means for controlling the main valve means for thus controlling the flow of said pressurized fluid through said main valve means to the releasable member and the brake means, and including a remote control means for controlling the operating means, said remote control means located remote from the transmission and adapted to be operated by the driver of the vehicle and movable to a plurality of positions for automatically operating the operating means to connect or disconnect the releasable member, connect or disconnect the brake means and to select either forward or reverse.
Claim 2
Dependent Claim
229 words
A remote control system for a transmission adapted for use in a vehicle and including a torque converter of the type having a pump member connected to an input shaft, a guide member and a turbine member connected to an output shaft, and wherein one of the pump or turbine members is releasable from its respective shaft, and including brake means for controlling the speed of rotation of the guide member, and a forward/reverse gear, said system comprising: sensing means for sensing the ratio n2/n1 which is the rotational speed of the output shaft to the rotational speed of the input shaft, pressure means for pressurizing fluid and selectively transmitting said pressurized fluid to main valve means for connecting and disconnecting said releasable member and said guide member brake means, operating means responsive to the sensing means for controlling the main valve means for thus controlling the flow of said pressurized fluid through said main valve means to the releasable member and the brake means, and including a remote control means for controlling the operating means, said remote control means located remote from the transmission and adapted to be operated by the driver of the vehicle and movable to a plurality of positions for automatically operating the operating means to connect or disconnect the releasable member, connect or disconnect the brake means and to select either forward or reverse.
Claim 3
Dependent Claim
19 words
The system of claim 1, said remote control means being a valve for controlling the flow of control fluid.
Claim 4
Dependent Claim
20 words
The system of claim 2, said remote control valve being a pneumatic valve, the said control fluid being pneumatic fluid.
Claim 5
Dependent Claim
35 words
The system of claim 1, said operating means including a plurality of control valves located in the pressure lines of the pressure means for controlling the flow of said pressurized fluid to the valve means.
Claim 6
Dependent Claim
51 words
The system of claim 4, including pneumatic fluid lines between the remote control valve and the said plurality of control valves, said remote control valve being movable between neutral, forward and reverse positions, each position causing a different flow of said pneumatic fluid for controlling different ones of said control valves.
Claim 7
Dependent Claim
38 words
The system of claim 5, said remote control valve further including a forward-neutral position and a reverse-neutral position in which the pressurized fluid controls the said control valve to engage said brake means and release the releasable member.
Claim 8
Dependent Claim
26 words
The system of claim 6, said remote control valve means including means for preventing movement thereof into reverse or reverse-neutral unless the vehicle is standing still.
Claim 9
Dependent Claim
47 words
The system of claim 5, said brake means including first brake means for single rotation and second brake means for double rotation, said operating means including means for automatically operating the braking means for movement between single rotation and double rotation when n2/n1 equals a predetermined value.
Claim 10
Dependent Claim
40 words
The system of claim 5, said torque converter including a direct drive connection for directly connecting together the input shaft and the output shaft, and said operating means including means for connecting direct dirve when n2/n1 equals a predetermined value.
Claim 11
Dependent Claim
60 words
The system of claim 5, including a throttle also located remote from the transmission and adapted to be operated by the vehicle driver, means for delivering said pneumatic fluid to the throttle, said throttle movable to positions to transmit said pneumatic fluid to operate at least some of said control valves for further controlling the operation of the torque converter.
Claim 12
Dependent Claim
43 words
The system of claim 1, said sensing means including means for electrically sensing n2/n1 and transmitting a signal indicative thereof, said operating means including a plurality of electrically operated fluid valves operable in response to the said signal received from the sensing means.
Claim 13
Dependent Claim
37 words
The system of claim 11, said remote control means including means for selectively electrically operating said fluid valves for connecting or disconnecting the releasable member, connecting or disconnecting the brake means and for selecting forward or reverse.
Claim 14
Dependent Claim
15 words
The system of claim 12, said remote control means including forward, neutral and reverse positions.
Claim 15
Dependent Claim
38 words
The system of claim 13, said remote control means further including a forward-neutral position and a reverse-neutral position in which the pressurized fluid controls the said fluid valves to engage said brake means and release the releasable member.
Claim 16
Dependent Claim
26 words
The system of claim 14, said remote control means including means for preventing movement thereof into reverse or reverse-neutral positions unless the vehicle is standing still.
Claim 17
Dependent Claim
52 words
The system of claim 12, including a throttle also located remote from the transmission and adapted to be operated by the vehicle driver, electrical switch means operated by said throttle to transmit electrical signals to operate at least some of said fluid valves for further controlling the operation of the torque converter.
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1978-03-31 | 1978-09-30 | 1979-04-01 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1982-03-31 | 1982-09-30 | 1983-04-01 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1986-03-31 | 1986-09-30 | 1987-04-01 | $7700.00 | Window Closed / Lapsed |