US3858460A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Four speed manual transmission and control
Assignee: Motors Liquidation Co
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Filing: 1973-11-12
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Granted: 1975-01-07
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Expires: 1993-11-12
Abstract
Abstract A manually shiftable planetary transmission and control providing four forward drive ratios and a reverse drive ratio. The forward ratios and the reverse ratio are established and interchanged by the operator through the selectively controlled application of a forward clutch and a direct-reverse clutch respectively. A manual clutch modulator valve is manipulated by the operator to control the engagement pressure of the clutches when ratios are being established or interchanged. The ratios are interchanged by the operator through the use of the clutch modulator valve and a manual selector valve which selector valve also conditions a relay valve to direct the controlled engagement pressure from the clutch modulator valve to the proper clutch for the establishment of the ratio selected by the operator. Positioning of the selector valve also conditions other clutches and brakes in the transmission without modulated engagement.
Inventors
- 👤 Fred C Porter
- 👤 Laszlo Nagy
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 09:45
CPC Classifications
F; F16; F16H; F16H61/00; F16H61/04; F16H61/06; F16H61/065; F16H61/02; F16H61/0262; F16H61/0265; F16H61/0272; F16H59/00; F16H59/02; F16H59/08; F16H2059/082; F16H2059/088; F16H61/0274
Claims Analysis
Total Claims: 4
Claim 1
Independent Claim
346 words
A planetary gearing power transmission and control comprising; input means for transmitting power to the transmission; output means for delivering power from the transmission; planetary gearing means for transmitting power from said input means to said output means at a plurality of drive ratios and including first fluid operated clutch means being selectively engageable and disengageable for controlling the establishment of a plurality of forward drive ratios, second fluid operated clutch means being selectively engageable and disengageable for controlling the establishment of a reverse drive ratio and cooperating with said first clutch means for establishing a one to one forward ratio, and a plurality of fluid operated friction drive establishing means being selectively engageable for cooperating with said first and second clutch means for establishing said drive ratios in said planetary gearing means; fluid pressure source means for providing fluid pressure to operate both said clutch means and said plurality of friction drive establishing means; manual selector valve means movable to a plurality of positions for selectively distributing fluid pressure from said source means to said plurality of friction drive establishing means during the establishment of all forward drive ratios except the one to one forward drive ratio and to said second clutch means during the establishment of said one to one forward drive ratio; manually operated clutch modulated valve means in fluid communication with said source means for generating a variable clutch engagement control pressure for selectively controlling the engagement and disengagement of said first and second clutch means; and relay valve means in fluid communication with said manual selector valve means and being positionable in a forward position or a reverse position by fluid pressure from said manual selector valve means and for directing the variable clutch engagement control pressure to said first clutch means when the forward position is established and to said second clutch means when said reverse position is established for permitting selective engagement and disengagement of said clutch means by the operator when manual selector valve means is being moved between forward drive positions or to the reverse drive position.
Claim 2
Dependent Claim
346 words
A planetary gearing power transmission and control comprising; input means for transmitting power to the transmission; output means for delivering power from the transmission; planetary gearing means for transmitting power from said input means to said output means at a plurality of drive ratios and including first fluid operated clutch means being selectively engageable and disengageable for controlling the establishment of a plurality of forward drive ratios, second fluid operated clutch means being selectively engageable and disengageable for controlling the establishment of a reverse drive ratio and cooperating with said first clutch means for establishing a one to one forward ratio, and a plurality of fluid operated friction drive establishing means being selectively engageable for cooperating with said first and second clutch means for establishing said drive ratios in said planetary gearing means; fluid pressure source means for providing fluid pressure to operate both said clutch means and said plurality of friction drive establishing means; manual selector valve means movable to a plurality of positions for selectively distributing fluid pressure from said source means to said plurality of friction drive establishing means during the establishment of all forward drive ratios except the one to one forward drive ratio and to said second clutch means during the establishment of said one to one forward drive ratio; manually operated clutch modulated valve means in fluid communication with said source means for generating a variable clutch engagement control pressure for selectively controlling the engagement and disengagement of said first and second clutch means; and relay valve means in fluid communication with said manual selector valve means and being positionable in a forward position or a reverse position by fluid pressure from said manual selector valve means and for directing the variable clutch engagement control pressure to said first clutch means when the forward position is established and to said second clutch means when said reverse position is established for permitting selective engagement and disengagement of said clutch means by the operator when manual selector valve means is being moved between forward drive positions or to the reverse drive position.
Claim 3
Dependent Claim
453 words
A planetary gearing power transmission and control comprising; input means for transmitting power to the transmission; output means for delivering power from the transmission; planetary gearing means for transmitting power from said input means to said output means at a plurality of drive ratios including first fluid operated clutch means being selectively engageable and disengageable for controlling the establishment of a plurality of forward drive ratios, second fluid operated clutch means being selectively engageable and disengageable for controlling the establishment of a reverse drive ratio and cooperating with said first clutch means for establishing a one to one forward ratio; and a plurality of fluid operated friction drive establishing means being selectively engageable for cooperating with said first and second clutch means for establishing said drive ratios in said planetary gearing means; fluid pressure source means for providing fluid pressure to operate both said clutch means and said plurality of friction drive establishing means; manual selector valve means movable to a plurality of positions for selectively distributing fluid pressure from said source means to said plurality of friction drive establishing means during the establishment of all forward drive ratios except the one to one forward drive ratio and to said second clutch means during the eStablishment of said one to one forward drive ratio; manually operated clutch modulator valve means in fluid communication with said source means for generating a variable clutch engagement control pressure for selectively controlling the engagement and disengagement of said first and second clutch means including a valve bore, a valve spool means slidably disposed in said valve bore, cam means for generating movement in response to an operator input, spring means disposed between said cam means and said valve spool means for translating the cam generated movement to a force on said valve spool means for generating the variable control pressure in proportion to the movement of the cam means, and means connecting said cam means and said valve bore for permitting said cam means to rotate relative to said valve bore and valve spool means in a plane perpendicular to the plane in which the valve spool means is slidably disposed; and relay valve means in fluid communication with said manual selector valve means and being positionable in a forward position or a reverse position by fluid pressure from said manual selector valve means and for directing the variable clutch engagement control pressure to said first clutch means when the forward position is established and to said second clutch means when said reverse position is established for permitting selective engagement and disengagement of said clutch means by the operator when manual selector valve means is being moved between forward drive positions and to the reverse drive position.
Claim 4
Dependent Claim
453 words
A planetary gearing power transmission and control comprising; input means for transmitting power to the transmission; output means for delivering power from the transmission; planetary gearing means for transmitting power from said input means to said output means at a plurality of drive ratios including first fluid operated clutch means being selectively engageable and disengageable for controlling the establishment of a plurality of forward drive ratios, second fluid operated clutch means being selectively engageable and disengageable for controlling the establishment of a reverse drive ratio and cooperating with said first clutch means for establishing a one to one forward ratio; and a plurality of fluid operated friction drive establishing means being selectively engageable for cooperating with said first and second clutch means for establishing said drive ratios in said planetary gearing means; fluid pressure source means for providing fluid pressure to operate both said clutch means and said plurality of friction drive establishing means; manual selector valve means movable to a plurality of positions for selectively distributing fluid pressure from said source means to said plurality of friction drive establishing means during the establishment of all forward drive ratios except the one to one forward drive ratio and to said second clutch means during the eStablishment of said one to one forward drive ratio; manually operated clutch modulator valve means in fluid communication with said source means for generating a variable clutch engagement control pressure for selectively controlling the engagement and disengagement of said first and second clutch means including a valve bore, a valve spool means slidably disposed in said valve bore, cam means for generating movement in response to an operator input, spring means disposed between said cam means and said valve spool means for translating the cam generated movement to a force on said valve spool means for generating the variable control pressure in proportion to the movement of the cam means, and means connecting said cam means and said valve bore for permitting said cam means to rotate relative to said valve bore and valve spool means in a plane perpendicular to the plane in which the valve spool means is slidably disposed; and relay valve means in fluid communication with said manual selector valve means and being positionable in a forward position or a reverse position by fluid pressure from said manual selector valve means and for directing the variable clutch engagement control pressure to said first clutch means when the forward position is established and to said second clutch means when said reverse position is established for permitting selective engagement and disengagement of said clutch means by the operator when manual selector valve means is being moved between forward drive positions and to the reverse drive position.
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) | 1978-01-06 | 1978-07-08 | 1979-01-07 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1982-01-06 | 1982-07-08 | 1983-01-07 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1986-01-06 | 1986-07-08 | 1987-01-07 | $7700.00 | Window Closed / Lapsed |