[특허]Control device for a hydrostatic transmission

[미국특허] Control device for a hydrostatic transmission 원문보기

IPC분류정보
국가/구분	United States(US) Patent 등록
국제특허분류(IPC7판)	F16D-031/02
출원번호	US-0298883 (1981-09-02)
발명자 / 주소	Young John E. G. (Watertown NY)
출원인 / 주소	General Signal Corporation (Stamford CT 02)
인용정보	피인용 횟수 : 9 인용 특허 : 9

초록 ▼

A control device for a hydrostatic transmission including apparatus for sensing a speed of a prime mover which powers a variable displacement pump of the hydrostatic transmission and for regulating the displacement of the variable displacement pump in accordance with the speed of the prime mover, is disclosed. The control device also includes apparatus for transmitting a mechanical feedback signal representative of the displacement of the variable displacement pump to the control device to maintain the variable displacement pump at a displacement proportional to the speed of the prime mover.

대표청구항 ▼

A hydrostatic transmission, comprising: a prime mover which operates at a variable speed; a variable displacement pump including a displacement control element and powered by said prime mover; a fluid motor powered by said variable displacement pump; speed sensing means for sensing the speed of said prime mover and producing a speed signal; fluid actuated position control means for controlling the position of said displacement control element; selector means for determining neutral, forward or reverse modes of operation of said variable displacement pump by defining fluid paths to said fluid actuated position control means as a function of a selected mode; compensator means having high and low pressure input ports and output ports connected to said selector means for providing a high or low pressure signal on said output port as a function of said speed signal; and feedback means for transmitting a mechanical feedback signal representing the displacement of said variable displacement pump to said selector means and said compensator means to maintain said variable displacement pump at a displacement as a function of said selected mode and said sensed speed of said prime mover. The method of claim 13 further comprising the steps of: powering a fixed displacement pump with said prime mover to produce a fluid flow from said fixed displacement pump proportional to the speed of said prime mover; generating a pressure differential proportional to the speed of said prime mover at an outlet of said fixed displacement pump; sensing said pressure differential; and producing a mechanical speed signal in response to said pressure differential when said pressure differential exceeds a predetermined value.

이 특허에 인용된 특허 (9) 인용/피인용 타임라인 분석

Spivey ; Jr. William J. (Joliet IL), Control circuit for variable displacement pump with venturi bypass control.
상세보기
Nonnemacher Gerhard (Korntal DEX) Knodel Emil (Stuttgart DEX) Bosch Paul (Ludwigsburg DEX), Control device for a pumping arrangement.
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Nonnenmacher Gerhard (Korntal DEX), Control system for a hydrostatic drive.
상세보기
Reynolds Richard W. (Ames IA) Myers Allen (Ames IA) Foley Daniel J. (Westminster MA), Electronic constant speed control for a hydrostatic transmission.
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Hoashi Kenzo (Yokohama JA) Inaba Nobuaki (Hiratsuka JA), Hydraulic circuit for steering control in articulate vehicles.
상세보기
Uehara Kazuo (Tokyo JPX), Single or plural variable displacement pump control with an improved flow metering valve.
상세보기
Habiger ; Cyril W., Underspeed actuator for a hydrostatic transmission having a shunt valve.
상세보기
Habiger Cyril W. (Joliet IL) Spivey William J. (Joliet IL), Underspeed actuator with part throttle control.
상세보기
Young John E. G. (Watertown NY), Variable delivery pump control system.
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이 특허를 인용한 특허 (9) 인용/피인용 타임라인 분석

Sellers,Cheryl L.; Crandell,Richard A.; Fei,Dong; Trethewey,Jeremy; Vanderspiegel,Natalie N., Deposition system and method.
상세보기
Raymond V. Nold, III, Differential hydrostatic transmission system.
상세보기
Sellers,Cheryl L.; Nordyke,Daniel S.; Crandell,Richard A.; Tomlins,Gregory; Fei,Dong; Panov,Alexander; Lane,William H.; Habeger,Craig F., Filter service system.
상세보기
Sellers, Cheryl Lynn; Thaler, David; Grimm, Mark T.; Trethewey, Jeremy; Vanderspiegel, Natalie Noel; Crandell, Richard A.; Fei, Dong; Hudson, Roger A.; Gasper, Mark Alan; DaCosta, Herbert; Fluga, Eric Charles; Mallampalli, Hemant Prasad; Frazier, Bruce; Fletcher, Matthew, Filter service system and method.
상세보기
Sellers, Cheryl Lynn; Thaler, David; Grimm, Mark T.; Trethewey, Jeremy; Vanderspiegel, Natalie Noel; Crandell, Richard A.; Fei, Dong; Hudson, Roger A.; Gasper, Mark Alan; DaCosta, Herbert; Fluga, Eric Charles; Mallampalli, Hemant Prasad; Frazier, Bruce; Fletcher, Matthew, Filter service system and method.
상세보기
Sellers,Cheryl L.; Fei,Dong; Akers,Jill R.; Banerjee,Bappaditya; Gasper,Mark A.; Nordyke,Daniel S.; Crandell,Richard A.; Sellers, II,Orlando; Ragle,Christie S.; Silver,Ronald; Faas,Julie M.; Park,Paul W.; Trethewey,Jeremy, Filter service system and method.
상세보기
Sellers,Cheryl Lynn; Thaler,David; Grimm,Mark T.; Trethewey,Jeremy; Vanderspiegel,Natalie Noel; Crandell,Richard A.; Fei,Dong; Hudson,Roger A.; Gasper,Mark Alan; DaCosta,Herbert; Fluga,Eric Charles; Mallampalli,Hemant Prasad; Frazier,Bruce; Fletcher,Matthew, Filter service system and method.
상세보기
Ross William A. (Excelsior MN) Arlt Randal E. (Eden Prairie MN), Hydrostatic transmission system and power limiter control therefor.
상세보기
Cronin, Michael G.; Black, Robert E., Step-change transmission having charge and variable displacement pumps.
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IPC	Description
A	생활필수품
A62	인명구조; 소방(사다리 E06C)
A62B	인명구조용의 기구, 장치 또는 방법(특히 의료용에 사용되는 밸브 A61M 39/00; 특히 물에서 쓰이는 인명구조 장치 또는 방법 B63C 9/00; 잠수장비 B63C 11/00; 특히 항공기에 쓰는 것, 예. 낙하산, 투출좌석 B64D; 특히 광산에서 쓰이는 구조장치 E21F 11/00)
A62B-1/08	.. 윈치 또는 풀리에 제동기구가 있는 것

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[미국특허] Control device for a hydrostatic transmission 원문보기