GB887194A - Improvements in or relating to pressure responsive valves for hydraulic systems - Google Patents

Improvements in or relating to pressure responsive valves for hydraulic systems

Info

Publication number
GB887194A
GB887194A GB3753/58A GB375358A GB887194A GB 887194 A GB887194 A GB 887194A GB 3753/58 A GB3753/58 A GB 3753/58A GB 375358 A GB375358 A GB 375358A GB 887194 A GB887194 A GB 887194A
Authority
GB
United Kingdom
Prior art keywords
valve
inlet
land
pressure
opening
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
GB3753/58A
Inventor
Hans Hildre
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.)
Hydraulik Brattvaag AS
HYDRAULIK AS
Original Assignee
Hydraulik Brattvaag AS
HYDRAULIK AS
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 Hydraulik Brattvaag AS, HYDRAULIK AS filed Critical Hydraulik Brattvaag AS
Priority to GB3753/58A priority Critical patent/GB887194A/en
Priority to DEH32800A priority patent/DE1085386B/en
Publication of GB887194A publication Critical patent/GB887194A/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
    • F16H61/00—Control functions within control units of change-speed- or reversing-gearings for conveying rotary motion ; Control of exclusively fluid gearing, friction gearing, gearings with endless flexible members or other particular types of gearing
    • F16H61/38—Control of exclusively fluid gearing
    • F16H61/40—Control of exclusively fluid gearing hydrostatic
    • F16H61/4043—Control of a bypass valve
    • 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
    • F16H61/00—Control functions within control units of change-speed- or reversing-gearings for conveying rotary motion ; Control of exclusively fluid gearing, friction gearing, gearings with endless flexible members or other particular types of gearing
    • F16H61/38—Control of exclusively fluid gearing
    • F16H61/40—Control of exclusively fluid gearing hydrostatic
    • F16H61/44—Control of exclusively fluid gearing hydrostatic with more than one pump or motor in operation
    • 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
    • F16H61/00—Control functions within control units of change-speed- or reversing-gearings for conveying rotary motion ; Control of exclusively fluid gearing, friction gearing, gearings with endless flexible members or other particular types of gearing
    • F16H61/38—Control of exclusively fluid gearing
    • F16H61/40—Control of exclusively fluid gearing hydrostatic
    • F16H61/44—Control of exclusively fluid gearing hydrostatic with more than one pump or motor in operation
    • F16H61/444—Control of exclusively fluid gearing hydrostatic with more than one pump or motor in operation by changing the number of pump or motor units in operation
    • 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
    • F16H61/00—Control functions within control units of change-speed- or reversing-gearings for conveying rotary motion ; Control of exclusively fluid gearing, friction gearing, gearings with endless flexible members or other particular types of gearing
    • F16H61/38—Control of exclusively fluid gearing
    • F16H61/40—Control of exclusively fluid gearing hydrostatic
    • F16H61/44—Control of exclusively fluid gearing hydrostatic with more than one pump or motor in operation
    • F16H61/448—Control circuits for tandem pumps or motors

Abstract

887,194. Valves. HYDRAULIK A.S. Feb. 5, 1958, No. 3753/58. Class 135. A pressure-responsive valve has an inlet closure formed by cylindrical port 141 and a larger cylindrical port 142 respectively tightly slidably fitting cylindrical openings 145, 144, port 141 having its opening before port 142 opens passage 144, means being provided to supply fluid to the face of port 142 to prevent a vacuum forming during opening. The pressure-responsive valve has an upper chamber 102 with a fluid outlet 83 and a pressure fluid inlet 80 and a lower chamber 103 having a fluid inlet 84 and outlet 85, and a cylinder 109 of smaller cross-sectional area than and in axial alignment with the first inlet, a valve member 111 having a first land 112 for closing the first inlet, a second intermediate land 114 for closing the opening 108 between the chambers and a third land forming a piston 115 in the cylinder 109, a bore 140 extending axially through the valve from the first to the third land, and an adjustable compression spring 119 urging the first land to close the first inlet and the second land to be spaced from the opening 108. Pressure from pump 2 controlled by valve 3 acts via 13 to drive a motor 10 connected on the same shaft as a motor 82 across the pipes 83, 84 to which the pressureresponsive valve is connected as a by-pass valve. With the valve open, motor 10 drives motor 82 as an unloaded pump circulating fluid through the open by-pass valve. When the load on motor 10 is sufficiently high the pressure in 13 acts via inlet 80 to move the small cylindrical port 141 down sufficiently until the pressure acts on the larger port 142 to quickly open the inlet and close the opening 108 so that pressure now drives the motor 82. Valve 114 closes opening 108 slightly before the inlet is fully opened. Suction at the shoulder between the two cylindrical portions 144, 145 is relieved by notches in the periphery of disc 142. Valve 114 is guided into opening 108 by recesses 147 on the lower face of the valve and the third land 115 is provided with a plug 148 forming a buffer with casing 109, 149. Specification 774,315 is referred to.
GB3753/58A 1953-11-28 1958-02-05 Improvements in or relating to pressure responsive valves for hydraulic systems Expired GB887194A (en)

Priority Applications (2)

Application Number Priority Date Filing Date Title
GB3753/58A GB887194A (en) 1953-11-28 1958-02-05 Improvements in or relating to pressure responsive valves for hydraulic systems
DEH32800A DE1085386B (en) 1953-11-28 1958-03-25 Automatic control slide for hydraulic drives

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
NO1037792X 1953-11-28
GB3753/58A GB887194A (en) 1953-11-28 1958-02-05 Improvements in or relating to pressure responsive valves for hydraulic systems
DEH32800A DE1085386B (en) 1953-11-28 1958-03-25 Automatic control slide for hydraulic drives

Publications (1)

Publication Number Publication Date
GB887194A true GB887194A (en) 1962-01-17

Family

ID=42536442

Family Applications (1)

Application Number Title Priority Date Filing Date
GB3753/58A Expired GB887194A (en) 1953-11-28 1958-02-05 Improvements in or relating to pressure responsive valves for hydraulic systems

Country Status (2)

Country Link
DE (1) DE1085386B (en)
GB (1) GB887194A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3682043A (en) * 1970-03-23 1972-08-08 Gen Motors Corp Flow control system

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
SE427810B (en) * 1981-11-23 1983-05-09 Atlas Copco Ab TWO-ENGINE TOOL FOR TIGHTENING SCREW TAPE

Family Cites Families (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE863580C (en) * 1946-05-02 1953-01-19 Hydraulik As Slide control for hydraulic transmission systems with two motors arranged on the same shaft
US2500627A (en) * 1947-07-15 1950-03-14 Gerotor May Corp Fluid distributing valve
GB774315A (en) * 1953-11-28 1957-05-08 Hydraulik As A pressure responsive control device for hydraulic systems

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3682043A (en) * 1970-03-23 1972-08-08 Gen Motors Corp Flow control system

Also Published As

Publication number Publication date
DE1085386B (en) 1960-07-14

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