GB950612A - Hydraulic apparatus - Google Patents

Hydraulic apparatus

Info

Publication number
GB950612A
GB950612A GB2727559A GB2727559A GB950612A GB 950612 A GB950612 A GB 950612A GB 2727559 A GB2727559 A GB 2727559A GB 2727559 A GB2727559 A GB 2727559A GB 950612 A GB950612 A GB 950612A
Authority
GB
United Kingdom
Prior art keywords
passages
pressure
valve
space
flow
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired
Application number
GB2727559A
Inventor
Bertram Carl Kempson
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Dowty Hydraulic Units Ltd
Original Assignee
Dowty Hydraulic Units Ltd
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Dowty Hydraulic Units Ltd filed Critical Dowty Hydraulic Units Ltd
Priority to GB2727559A priority Critical patent/GB950612A/en
Publication of GB950612A publication Critical patent/GB950612A/en
Expired legal-status Critical Current

Links

Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16H—GEARING
    • F16H39/00—Rotary fluid gearing using pumps and motors of the volumetric type, i.e. passing a predetermined volume of fluid per revolution
    • F16H39/02—Rotary fluid gearing using pumps and motors of the volumetric type, i.e. passing a predetermined volume of fluid per revolution with liquid motors at a distance from liquid pumps

Abstract

950,612. Fluid-pressure servomotor systems. DOWTY HYDRAULIC UNITS Ltd. Nov. 1, 1960 [Aug. 10, 1959], No.27275/59. Heading G3P. A device for controlling the flow of high pressure liquid in either direction between two passages 2, 3 comprises a pair of spring loaded valve members 7, 8 connected so that when either is open flow between the two passages is permitted, a common space 6 connected through a restrictor 19 and a non-return valve 22 to each passage, and a pilot valve 25 which when open reduces the pressure in the space 6 so that one or other of the valves 7, 8 may open to connect the two passages. In the preferred embodiment, a pump 1 is connected by the passages 2, 3 to a motor 4. When the pressure in either of the passages 2 or 3 reaches a predetermined value a ball 37 in the pilot valve is lifted from its seat against the pressure of a spring 33 so that liquid may flow from the space 6 to the reservoir and one of the valve members 7 or 8 be opened by the excess pressure to connect the passages 2, 3. The ball valve 37 may be opened permanently by rotating a cam 31 to permit a spring-loaded plunger 28 to move to the right. In normal circumstances, a low boost pressure is maintained in the system by a small auxiliary pump. The space 6 may be separated from the valve member which may be diaphragm actuated.
GB2727559A 1959-08-10 1959-08-10 Hydraulic apparatus Expired GB950612A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
GB2727559A GB950612A (en) 1959-08-10 1959-08-10 Hydraulic apparatus

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB2727559A GB950612A (en) 1959-08-10 1959-08-10 Hydraulic apparatus

Publications (1)

Publication Number Publication Date
GB950612A true GB950612A (en) 1964-02-26

Family

ID=10256927

Family Applications (1)

Application Number Title Priority Date Filing Date
GB2727559A Expired GB950612A (en) 1959-08-10 1959-08-10 Hydraulic apparatus

Country Status (1)

Country Link
GB (1) GB950612A (en)

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2009206A1 (en) * 1968-05-23 1970-01-30 Int Harvester Co
DE1650739B1 (en) * 1966-10-11 1971-10-07 Internat Harvester Co HYDROSTATIC TRANSMISSION
DE2241364A1 (en) * 1971-09-14 1973-03-22 Sundstrand Corp HYDROSTATIC MOTOR VEHICLE TRANSMISSION WITH ACCELERATION CONTROL
DE2363762A1 (en) * 1973-12-21 1975-06-26 Kloeckner Humboldt Deutz Ag Control system for hydrostatic transmission - with link to brake pedal to set transmission to neutral

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1650739B1 (en) * 1966-10-11 1971-10-07 Internat Harvester Co HYDROSTATIC TRANSMISSION
FR2009206A1 (en) * 1968-05-23 1970-01-30 Int Harvester Co
DE2241364A1 (en) * 1971-09-14 1973-03-22 Sundstrand Corp HYDROSTATIC MOTOR VEHICLE TRANSMISSION WITH ACCELERATION CONTROL
DE2363762A1 (en) * 1973-12-21 1975-06-26 Kloeckner Humboldt Deutz Ag Control system for hydrostatic transmission - with link to brake pedal to set transmission to neutral

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