Patent US3886820A successfully refreshed from Google Patents.
US3886820A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Transmission and control
Assignee: Motors Liquidation Co
•
Filing: 1973-11-28
•
Granted: 1975-06-03
•
Expires: 1993-11-28
Abstract
Abstract A control for a multi-speed transmission adapted to be driven by a two spool gas turbine engine. The control has valving to control the shifting of ratios within the transmission including an engagement control valve responsive to compressor discharge pressure and vehicle speed. The engagement control valve permits the operator to control the engagement of a drive establishing device, for both low forward drive and reverse drive, at predetermined engine power conditions as represented by compressor discharge pressure.
Inventors
- 👤 Carl A Lentz
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 03:43
CPC Classifications
F; F02; F02C; F02C7/00; F02C7/36; F16; F16H; F16H61/00; F16H61/02; F16H61/0262; F16H61/0265; F16H61/0267; F05; F05D; F05D2260/00; F05D2260/40; F05D2260/402; F05D2260/4023; F16H59/00; F16H59/14; F16H59/26; F16H59/28; F16H61/16
Claims Analysis
Total Claims: 8
Claim 1
Independent Claim
289 words
A control for a power transmission driven by a two-spool turbine engine having a compressor and compressor drive turbine on one shaft and a power turbine on the other shaft, and a fuel burner effective to heat the compressor discharge air and deliver the same to each turbine, the engine further having a rate of fuel supply control and a compressor discharge chamber wherein the pressure increases with increased compressor shaft speed and with increased air density and thereby represents turbine power comprising a plurality of selectively operable fluid operated friction drive establishing means for establishing a plurality fo forward drives and a reverse drive in said transmission and one of said drive establishing means being operated in the low forward drive and the reverse drive; fluid source means for providing fluid pressure in said control; shift valve means, including manual valve means selectively moveable to forward, neutral and reverse drive positions and being in fluid communication with said fluid source means for directing fluid pressure to said fluid operated friction drive establishing means; means responsive to the compressor discharge pressure; and engagement control valve means in fluid communication with said shift valve means and said one of said friction drive establishing means for controlling the operation of said one of said friction drive establishing means including control chamber means in fluid communication with the means responsive to compressor discharge pressure for preventing engagement of said one friction drive establishing means when either (a) the manual valve means is in the forward drive position and the compressor discharge pressure is below a predetermined value or (b) the manual valve means is moved from neutral to the reverse drive position and the compressor discharge pressure is above a predetermined value.
Claim 2
Dependent Claim
289 words
A control for a power transmission driven by a two-spool turbine engine having a compressor and compressor drive turbine on one shaft and a power turbine on the other shaft, and a fuel burner effective to heat the compressor discharge air and deliver the same to each turbine, the engine further having a rate of fuel supply control and a compressor discharge chamber wherein the pressure increases with increased compressor shaft speed and with increased air density and thereby represents turbine power comprising a plurality of selectively operable fluid operated friction drive establishing means for establishing a plurality fo forward drives and a reverse drive in said transmission and one of said drive establishing means being operated in the low forward drive and the reverse drive; fluid source means for providing fluid pressure in said control; shift valve means, including manual valve means selectively moveable to forward, neutral and reverse drive positions and being in fluid communication with said fluid source means for directing fluid pressure to said fluid operated friction drive establishing means; means responsive to the compressor discharge pressure; and engagement control valve means in fluid communication with said shift valve means and said one of said friction drive establishing means for controlling the operation of said one of said friction drive establishing means including control chamber means in fluid communication with the means responsive to compressor discharge pressure for preventing engagement of said one friction drive establishing means when either (a) the manual valve means is in the forward drive position and the compressor discharge pressure is below a predetermined value or (b) the manual valve means is moved from neutral to the reverse drive position and the compressor discharge pressure is above a predetermined value.
Claim 3
Dependent Claim
289 words
A control for a power transmission driven by a two-spool turbine engine having a compressor and compressor drive turbine on one shaft and a power turbine on the other shaft, and a fuel burner effective to heat the compressor discharge air and deliver the same to each turbine, the engine further having a rate of fuel supply control and a compressor discharge chamber wherein the pressure increases with increased compressor shaft speed and with increased air density and thereby represents turbine power comprising a plurality of selectively operable fluid operated friction drive establishing means for establishing a plurality fo forward drives and a reverse drive in said transmission and one of said drive establishing means being operated in the low forward drive and the reverse drive; fluid source means for providing fluid pressure in said control; shift valve means, including manual valve means selectively moveable to forward, neutral and reverse drive positions and being in fluid communication with said fluid source means for directing fluid pressure to said fluid operated friction drive establishing means; means responsive to the compressor discharge pressure; and engagement control valve means in fluid communication with said shift valve means and said one of said friction drive establishing means for controlling the operation of said one of said friction drive establishing means including control chamber means in fluid communication with the means responsive to compressor discharge pressure for preventing engagement of said one friction drive establishing means when either (a) the manual valve means is in the forward drive position and the compressor discharge pressure is below a predetermined value or (b) the manual valve means is moved from neutral to the reverse drive position and the compressor discharge pressure is above a predetermined value.
Claim 4
Dependent Claim
289 words
A control for a power transmission driven by a two-spool turbine engine having a compressor and compressor drive turbine on one shaft and a power turbine on the other shaft, and a fuel burner effective to heat the compressor discharge air and deliver the same to each turbine, the engine further having a rate of fuel supply control and a compressor discharge chamber wherein the pressure increases with increased compressor shaft speed and with increased air density and thereby represents turbine power comprising a plurality of selectively operable fluid operated friction drive establishing means for establishing a plurality fo forward drives and a reverse drive in said transmission and one of said drive establishing means being operated in the low forward drive and the reverse drive; fluid source means for providing fluid pressure in said control; shift valve means, including manual valve means selectively moveable to forward, neutral and reverse drive positions and being in fluid communication with said fluid source means for directing fluid pressure to said fluid operated friction drive establishing means; means responsive to the compressor discharge pressure; and engagement control valve means in fluid communication with said shift valve means and said one of said friction drive establishing means for controlling the operation of said one of said friction drive establishing means including control chamber means in fluid communication with the means responsive to compressor discharge pressure for preventing engagement of said one friction drive establishing means when either (a) the manual valve means is in the forward drive position and the compressor discharge pressure is below a predetermined value or (b) the manual valve means is moved from neutral to the reverse drive position and the compressor discharge pressure is above a predetermined value.
Claim 5
Dependent Claim
358 words
A control for a power transmission driven by a two-spool turbine engine having a compressor and compressor drive turbine on one shaft and a power turbine on the other shaft, and a fuel burner effective to heat the compressor discharge air and deliver the same to each turbine, the engine further having a rate of fuel supply control and a compressor discharge chamber wherein the pressure increases with increased compressor shaft speed and with increased air density and thereby represents turbine power comprising a plurality of selectively operable fluid operated friction drive establishing means for establishing a plurality of forward drives and a reverse drive in said transmission and one of said drive establishing means being operated in the low forward drive and the reverse drive; fluid source means for providing fluid pressure in said control; shift valve means, including manual valve means selectively moveable to forward, neutral and reverse drive positions and being in fluid communication with said fluid source means for directing fluid pressure to said fluid operated friction drive establishing means; governor means in fluid communication with said fluid source means for establishing a governor control pressure in said contol; means responsive to compressor discharge pressure being in fluid communication with Said fluid source means for providing an engine power signal in said control; and engagement control valve means in fluid communication with said shift valve means and said one of said friction drive establishing means for controlling the operation of said one of said friction drive establishing means including first control chamber means in fluid communication with the engine power signal of said compressor discharge pressure responsive means for preventing engagement of said one friction drive establishing means when either (a) the manual valve means is in the forward drive position and the engine power is below a predetermined value or (b) the manual valve means is moved to the reverse drive position and the engine power is above a predetermined value, and second control chamber means in fluid communication with said governor means for preventing a forward to reverse interchange in said transmission when the governor control pressure is above a predetermined value.
Claim 6
Dependent Claim
358 words
A control for a power transmission driven by a two-spool turbine engine having a compressor and compressor drive turbine on one shaft and a power turbine on the other shaft, and a fuel burner effective to heat the compressor discharge air and deliver the same to each turbine, the engine further having a rate of fuel supply control and a compressor discharge chamber wherein the pressure increases with increased compressor shaft speed and with increased air density and thereby represents turbine power comprising a plurality of selectively operable fluid operated friction drive establishing means for establishing a plurality of forward drives and a reverse drive in said transmission and one of said drive establishing means being operated in the low forward drive and the reverse drive; fluid source means for providing fluid pressure in said control; shift valve means, including manual valve means selectively moveable to forward, neutral and reverse drive positions and being in fluid communication with said fluid source means for directing fluid pressure to said fluid operated friction drive establishing means; governor means in fluid communication with said fluid source means for establishing a governor control pressure in said contol; means responsive to compressor discharge pressure being in fluid communication with Said fluid source means for providing an engine power signal in said control; and engagement control valve means in fluid communication with said shift valve means and said one of said friction drive establishing means for controlling the operation of said one of said friction drive establishing means including first control chamber means in fluid communication with the engine power signal of said compressor discharge pressure responsive means for preventing engagement of said one friction drive establishing means when either (a) the manual valve means is in the forward drive position and the engine power is below a predetermined value or (b) the manual valve means is moved to the reverse drive position and the engine power is above a predetermined value, and second control chamber means in fluid communication with said governor means for preventing a forward to reverse interchange in said transmission when the governor control pressure is above a predetermined value.
Claim 7
Dependent Claim
385 words
A control for a power transmission driven by a two-spool turbine engine having a compressor and compressor drive turbine on one shaft and a power turbine in the other shaft, and a fuel burner effective to heat the compressor discharge air and deliver the same to each turbine, the engine further having a rate of fuel supply control and a compressor discharge chamber wherein the pressure increases with increased compressor shaft speed and with increased air density and thereby represents turbine power comprising a plurality of selectively operable fluid operated friction drive establishing means for establishing a plurality of forward drives and a reverse drive in said transmission and one of said friction drive establishing means being operated in the low forward drive and the reverse drive; fluid source means for providing fluid pressure in said control; shift valve means; including manual valve means selectively moveable to forward, neutral and reverse drive positions and being in fluid communication with said fluid source means for directing fluid pressure to said fluid operated friction drive establishing means; governor means in fluid communication with said fluid source means for establishing a governor control pressure in said control; compressor discharge pressure responsive means in fluid communication with said fluid source means for providing an engine power signal in said control; and engagement control valve means in fluid communication with said shift valve means and said one of said friction drive establishing means for controlling the operation of said one of said friction drive establishing means including a valve spool, passage means interconnecting the valve spool, said shift valve means and said one friction drive establishing means, first control chamber means in fluid communication with the engine power signal of said compressor discharge pressure responsive means and operatively connected with said valve spool for controlling movement of said valve spool to control fluid pressure in said one friction drive establishing means when the manual valve means in the forward drive position and the engine power is below a predetermined value, and second control chamber means in fluid communication with said governor means and operatively connected with said valve spool for controlling fluid pressure in said one friction drive establishing means to prevent a forward to reverse interchange in said transmission when the governor control pressure is above a predetermined value.
Claim 8
Dependent Claim
385 words
A control for a power transmission driven by a two-spool turbine engine having a compressor and compressor drive turbine on one shaft and a power turbine in the other shaft, and a fuel burner effective to heat the compressor discharge air and deliver the same to each turbine, the engine further having a rate of fuel supply control and a compressor discharge chamber wherein the pressure increases with increased compressor shaft speed and with increased air density and thereby represents turbine power comprising a plurality of selectively operable fluid operated friction drive establishing means for establishing a plurality of forward drives and a reverse drive in said transmission and one of said friction drive establishing means being operated in the low forward drive and the reverse drive; fluid source means for providing fluid pressure in said control; shift valve means; including manual valve means selectively moveable to forward, neutral and reverse drive positions and being in fluid communication with said fluid source means for directing fluid pressure to said fluid operated friction drive establishing means; governor means in fluid communication with said fluid source means for establishing a governor control pressure in said control; compressor discharge pressure responsive means in fluid communication with said fluid source means for providing an engine power signal in said control; and engagement control valve means in fluid communication with said shift valve means and said one of said friction drive establishing means for controlling the operation of said one of said friction drive establishing means including a valve spool, passage means interconnecting the valve spool, said shift valve means and said one friction drive establishing means, first control chamber means in fluid communication with the engine power signal of said compressor discharge pressure responsive means and operatively connected with said valve spool for controlling movement of said valve spool to control fluid pressure in said one friction drive establishing means when the manual valve means in the forward drive position and the engine power is below a predetermined value, and second control chamber means in fluid communication with said governor means and operatively connected with said valve spool for controlling fluid pressure in said one friction drive establishing means to prevent a forward to reverse interchange in said transmission when the governor control pressure is above a predetermined 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) | 1978-06-02 | 1978-12-02 | 1979-06-03 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1982-06-02 | 1982-12-02 | 1983-06-03 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1986-06-02 | 1986-12-02 | 1987-06-03 | $7700.00 | Window Closed / Lapsed |