US3583154A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Dual throttle drive ratio control for a power transmission
Assignee: Motors Liquidation Co
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Filing: 1969-10-03
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Granted: 1971-06-08
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Expires: 1989-10-03
Abstract
Abstract A ratio control valve for use with a gas turbine driven hydrostatic transmission is shown and described in which the ratio control valve is acted upon by an engine governor control signal and a throttle control signal. An engine governor control provides a signal to the ratio control valve indicating engine speed and a throttle control signal indicating desired engine speed. The transmission drive ratio is established in accordance with these signals when the signals are balanced on the ratio control valve. The throttle control has two portions; a manual portion which controls a small range of throttle settings and a torque demand portion which is responsive to compressor discharge pressure of the gas turbine engine to control a larger range of throttle settings.
Inventors
- 👤 Robert C Utter
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 16:31
CPC Classifications
F; F16; F16H; F16H61/00; F16H61/38; F16H61/40; F16H61/46; F16H61/462; F16H59/00; F16H59/36; F16H2059/366; F16H59/14; F16H59/26; F16H59/28
Claims Analysis
Total Claims: 14
Claim 1
Independent Claim
120 words
In a control for a hydraulic transmission having an infinitely variable drive ratio and driven by a gas turbine engine; ratio governor means operatively connected with said transmission to control the drive ratio thereof; engine governor means operatively connected to said ratio governor means for providing a governor signal thereto; and throttle control means operatively connected to said ratio governor means and being movable through a throttle range including manual control means operative on said ratio governor means to provide a manual throttle signal thereto during an initial portion of the throttle range, and engine torque demand means operative on said ratio governor means to provide an engine torque demand signal thereto during the remaining portion of the throttle range.
Claim 2
Dependent Claim
120 words
In a control for a hydraulic transmission having an infinitely variable drive ratio and driven by a gas turbine engine; ratio governor means operatively connected with said transmission to control the drive ratio thereof; engine governor means operatively connected to said ratio governor means for providing a governor signal thereto; and throttle control means operatively connected to said ratio governor means and being movable through a throttle range including manual control means operative on said ratio governor means to provide a manual throttle signal thereto during an initial portion of the throttle range, and engine torque demand means operative on said ratio governor means to provide an engine torque demand signal thereto during the remaining portion of the throttle range.
Claim 3
Dependent Claim
163 words
In a control for a hydrostatic transmission having an infinitely variable drive ratio and driven by a gas turbine engine having a compressor discharge pressure; servocontrol means operatively connected with said transmission for controlling the drive ratio; ratio governor means in fluid communication with said servocontrol means for distributing a ratio advance signal and a ratio return signal thereto; engine governor means operatively connected with said ratio governor means for supplying a governor signal thereto proportional to the speed of the gas turbine engine; throttle control means movable through a throttle range and operatively connected with said ratio governor means for supplying a throttle signal thereto in opposition to the governor signal including manual throttle means for supplying a manual throttle signal during the initial portion of the throttle range and pressure throttle means operatively connected to the gas turbine enginE to sense the compressor discharge pressure thereof for supplying a torque demand throttle signal during the throttle range after the initial portion.
Claim 4
Dependent Claim
163 words
In a control for a hydrostatic transmission having an infinitely variable drive ratio and driven by a gas turbine engine having a compressor discharge pressure; servocontrol means operatively connected with said transmission for controlling the drive ratio; ratio governor means in fluid communication with said servocontrol means for distributing a ratio advance signal and a ratio return signal thereto; engine governor means operatively connected with said ratio governor means for supplying a governor signal thereto proportional to the speed of the gas turbine engine; throttle control means movable through a throttle range and operatively connected with said ratio governor means for supplying a throttle signal thereto in opposition to the governor signal including manual throttle means for supplying a manual throttle signal during the initial portion of the throttle range and pressure throttle means operatively connected to the gas turbine enginE to sense the compressor discharge pressure thereof for supplying a torque demand throttle signal during the throttle range after the initial portion.
Claim 5
Dependent Claim
141 words
In a control for a hydraulic transmission having an infinitely variable drive ratio and driven by a gas turbine engine; ratio governor means operatively connected with said transmission to control the drive ratio thereof; engine-driven governor means operatively connected to said ratio governor means for providing a governor signal thereto proportional to the speed of the gas turbine engine; and throttle control means operatively connected to said ratio governor means and being movable through a throttle range including manual control means operative on said ratio governor means to provide a manual throttle signal thereto during an initial portion of the throttle range in opposition to the governor signal, and engine torque demand means operative on said ratio governor means to provide an engine torque demand signal thereto during the remaining portion of the throttle range in opposition to the governor signal.
Claim 6
Dependent Claim
141 words
In a control for a hydraulic transmission having an infinitely variable drive ratio and driven by a gas turbine engine; ratio governor means operatively connected with said transmission to control the drive ratio thereof; engine-driven governor means operatively connected to said ratio governor means for providing a governor signal thereto proportional to the speed of the gas turbine engine; and throttle control means operatively connected to said ratio governor means and being movable through a throttle range including manual control means operative on said ratio governor means to provide a manual throttle signal thereto during an initial portion of the throttle range in opposition to the governor signal, and engine torque demand means operative on said ratio governor means to provide an engine torque demand signal thereto during the remaining portion of the throttle range in opposition to the governor signal.
Claim 7
Dependent Claim
143 words
In a control for a hydraulic transmission having an infinitely variable drive ratio and driven by a gas turbine engine; ratio governor means operatively connected with said transmission to control the drive ratio thereof and including valve spool means; engine governor means operatively connected to said valve spool means for providing a governor signal thereto; and throttle control means operatively connected to said ratio governor means and being movable through a throttle range including manual control means having cam means contacting said valve spool means to provide a manual throttle signal thereto during an initial portion of the throttle range, and engine torque demand means including cam means, contacting said valve spool means to provide an engine torque demand signal thereto during the remaining portion of the throttle range when said first-mentioned cam means is out of contact with said valve spool means.
Claim 8
Dependent Claim
143 words
In a control for a hydraulic transmission having an infinitely variable drive ratio and driven by a gas turbine engine; ratio governor means operatively connected with said transmission to control the drive ratio thereof and including valve spool means; engine governor means operatively connected to said valve spool means for providing a governor signal thereto; and throttle control means operatively connected to said ratio governor means and being movable through a throttle range including manual control means having cam means contacting said valve spool means to provide a manual throttle signal thereto during an initial portion of the throttle range, and engine torque demand means including cam means, contacting said valve spool means to provide an engine torque demand signal thereto during the remaining portion of the throttle range when said first-mentioned cam means is out of contact with said valve spool means.
Claim 9
Dependent Claim
215 words
In a control for a hydrostatic transmission having an infinitely variable drive ratio and driven by a gas turbine engine having a compressor discharge pressure; servocontrol means operatively connected with said transmission for controlling the drive ratio; ratio governor means in fluid communication with said servocontrol means including valve spool means movable to distribute a ratio advance signal and a ratio return signal thereto; engine governor means operatively connected with said valve spool means for supplying a governor signal thereto proportional to the speed of the gas turbine engine to urge said valve spool means to distribute the ratio advance signal; throttle control means movable through a throttle range and operatively connected with said ratio governor means for supplying a throttle signal thereto in opposition to the governor signal including manual throttle means having cam means contacting said valve spool means during the initial portion of the throttle range for supplying a manual throttle signal greater than the governor signal at engine idle speed to prevent distribution of ratio advance signal and pressure throttle means operatively connected to the gas turbine engine to sense the compressor discharge pressure thereof including cam means rotatable in response to the compressor discharge pressure for supplying a torque demand throttle signal during the throttle range after the initial portion.
Claim 10
Dependent Claim
215 words
In a control for a hydrostatic transmission having an infinitely variable drive ratio and driven by a gas turbine engine having a compressor discharge pressure; servocontrol means operatively connected with said transmission for controlling the drive ratio; ratio governor means in fluid communication with said servocontrol means including valve spool means movable to distribute a ratio advance signal and a ratio return signal thereto; engine governor means operatively connected with said valve spool means for supplying a governor signal thereto proportional to the speed of the gas turbine engine to urge said valve spool means to distribute the ratio advance signal; throttle control means movable through a throttle range and operatively connected with said ratio governor means for supplying a throttle signal thereto in opposition to the governor signal including manual throttle means having cam means contacting said valve spool means during the initial portion of the throttle range for supplying a manual throttle signal greater than the governor signal at engine idle speed to prevent distribution of ratio advance signal and pressure throttle means operatively connected to the gas turbine engine to sense the compressor discharge pressure thereof including cam means rotatable in response to the compressor discharge pressure for supplying a torque demand throttle signal during the throttle range after the initial portion.
Claim 11
Dependent Claim
106 words
In a control for a multiratio transmission driven by a gas turbine engine having a compressor discharge pressure; ratio control means operatively connected with said transmission for controlling the drive ratio thereof; governor means operatively connected to said ratio control means for providing a governor signal thereto; and throttle control means operatively connected to said ratio control means to provide a manual throttle signal thereto during one portion of the throttle range, and engine torque demand means operative on said ratio governor means to provide an enGine torque demand signal thereto in response to the compressor discharge pressure during the remaining portion of the throttle range.
Claim 12
Dependent Claim
106 words
In a control for a multiratio transmission driven by a gas turbine engine having a compressor discharge pressure; ratio control means operatively connected with said transmission for controlling the drive ratio thereof; governor means operatively connected to said ratio control means for providing a governor signal thereto; and throttle control means operatively connected to said ratio control means to provide a manual throttle signal thereto during one portion of the throttle range, and engine torque demand means operative on said ratio governor means to provide an enGine torque demand signal thereto in response to the compressor discharge pressure during the remaining portion of the throttle range.
Claim 13
Dependent Claim
132 words
In a control for a power transmission having drive ratio changing means and driven by a gas turbine engine having a compressor discharge pressure; ratio control means operatively connected with said transmission to control the drive ratio thereof; governor means operatively connected to said ratio control means for providing a ratio increase signal thereto; and throttle control means operatively connnected to said ratio control means and being movable through a throttle range to provide ratio decrease signals including manual control means operative on said ratio control means to provide a manual ratio decrease signal thereto during an end portion of the throttle range, and compressor discharge pressure means operative on said ratio control means to provide a compressor discharge pressure ratio decrease signal thereto during the remaining portion of the throttle range.
Claim 14
Dependent Claim
132 words
In a control for a power transmission having drive ratio changing means and driven by a gas turbine engine having a compressor discharge pressure; ratio control means operatively connected with said transmission to control the drive ratio thereof; governor means operatively connected to said ratio control means for providing a ratio increase signal thereto; and throttle control means operatively connnected to said ratio control means and being movable through a throttle range to provide ratio decrease signals including manual control means operative on said ratio control means to provide a manual ratio decrease signal thereto during an end portion of the throttle range, and compressor discharge pressure means operative on said ratio control means to provide a compressor discharge pressure ratio decrease signal thereto during the remaining portion of the throttle 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) | 1974-06-07 | 1974-12-07 | 1975-06-08 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-06-07 | 1978-12-07 | 1979-06-08 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-06-07 | 1982-12-07 | 1983-06-08 | $7700.00 | Window Closed / Lapsed |