GB915115A - Improvements in control valve means for fluid pressure operated apparatus - Google Patents

Improvements in control valve means for fluid pressure operated apparatus

Info

Publication number
GB915115A
GB915115A GB3674959A GB3674959A GB915115A GB 915115 A GB915115 A GB 915115A GB 3674959 A GB3674959 A GB 3674959A GB 3674959 A GB3674959 A GB 3674959A GB 915115 A GB915115 A GB 915115A
Authority
GB
United Kingdom
Prior art keywords
motor
passage
spool
load
allows
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
GB3674959A
Inventor
Francis Henry Tennis
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.)
Hydraulic Unit Specialties Co
Original Assignee
Hydraulic Unit Specialties Co
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
Priority to US76179958 priority Critical patent/US2980135A/en
Application filed by Hydraulic Unit Specialties Co filed Critical Hydraulic Unit Specialties Co
Priority to GB3674959A priority patent/GB915115A/en
Priority to FR851272A priority patent/FR1280933A/en
Priority to DEH41639A priority patent/DE1214961B/en
Publication of GB915115A publication Critical patent/GB915115A/en
Expired legal-status Critical Current

Links

Classifications

    • E—FIXED CONSTRUCTIONS
    • E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
    • E02F—DREDGING; SOIL-SHIFTING
    • E02F9/00—Component parts of dredgers or soil-shifting machines, not restricted to one of the kinds covered by groups E02F3/00 - E02F7/00
    • E02F9/20—Drives; Control devices
    • E02F9/22—Hydraulic or pneumatic drives
    • E—FIXED CONSTRUCTIONS
    • E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
    • E02F—DREDGING; SOIL-SHIFTING
    • E02F3/00—Dredgers; Soil-shifting machines
    • E02F3/04—Dredgers; Soil-shifting machines mechanically-driven
    • E02F3/28—Dredgers; Soil-shifting machines mechanically-driven with digging tools mounted on a dipper- or bucket-arm, i.e. there is either one arm or a pair of arms, e.g. dippers, buckets
    • E02F3/36—Component parts
    • E02F3/42—Drives for dippers, buckets, dipper-arms or bucket-arms
    • E02F3/422—Drive systems for bucket-arms, front-end loaders, dumpers or the like
    • E—FIXED CONSTRUCTIONS
    • E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
    • E02F—DREDGING; SOIL-SHIFTING
    • E02F3/00—Dredgers; Soil-shifting machines
    • E02F3/04—Dredgers; Soil-shifting machines mechanically-driven
    • E02F3/28—Dredgers; Soil-shifting machines mechanically-driven with digging tools mounted on a dipper- or bucket-arm, i.e. there is either one arm or a pair of arms, e.g. dippers, buckets
    • E02F3/36—Component parts
    • E02F3/42—Drives for dippers, buckets, dipper-arms or bucket-arms
    • E02F3/43—Control of dipper or bucket position; Control of sequence of drive operations
    • E02F3/431—Control of dipper or bucket position; Control of sequence of drive operations for bucket-arms, front-end loaders, dumpers or the like
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F15—FLUID-PRESSURE ACTUATORS; HYDRAULICS OR PNEUMATICS IN GENERAL
    • F15B—SYSTEMS ACTING BY MEANS OF FLUIDS IN GENERAL; FLUID-PRESSURE ACTUATORS, e.g. SERVOMOTORS; DETAILS OF FLUID-PRESSURE SYSTEMS, NOT OTHERWISE PROVIDED FOR
    • F15B13/00—Details of servomotor systems ; Valves for servomotor systems
    • F15B13/02—Fluid distribution or supply devices characterised by their adaptation to the control of servomotors
    • F15B13/04—Fluid distribution or supply devices characterised by their adaptation to the control of servomotors for use with a single servomotor

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Mining & Mineral Resources (AREA)
  • Civil Engineering (AREA)
  • Structural Engineering (AREA)
  • Physics & Mathematics (AREA)
  • Fluid Mechanics (AREA)
  • Fluid-Pressure Circuits (AREA)

Abstract

915,115. Valves. HYDRAULIC UNIT SPECIALTIES CO. Oct. 29, 1959, No. 36749/59. Class 135. In a control valve for a motor raising or lowering a heavy member, movement of a spool valve 34 from a neutral position, in which fluid is pumped from inlet 40 to outlet 41 via spool groove 46 and passages 39, 42, to the right allows spool load 63 to close passage 42 and open an inlet pressure supply passage 47 to a motor " raise " port 49 while load 69 allows the other side of the motor to exhaust via passages 51, 67. On spool movement to the left, load 64 allows inlet pressure at 48 to pass to a motor " lower " port 51 and load 68 allows exhaust via passages 49, 66 and an orifice 71. In order to avoid cavitation on the lowering side of the motor due to movement of the motor by the heavy member and inability of the spool to pass sufficient fluid in its lowering position, spring-loaded valve 78 opens under the back pressure in passage 66 so that exhausting fluid may pass to the motor " lower " port 51. The orifice 71 may connect passage 66 to an exhaust passage 86 via an inlet pressure relief valve 83. A check valve is formed between the inlet 40 and the passage 47, 48. Specification 915,114 is referred to.
GB3674959A 1958-09-18 1959-10-29 Improvements in control valve means for fluid pressure operated apparatus Expired GB915115A (en)

Priority Applications (4)

Application Number Priority Date Filing Date Title
US76179958 US2980135A (en) 1958-09-18 1958-09-18 Hydraulically controlled apparatus
GB3674959A GB915115A (en) 1959-10-29 1959-10-29 Improvements in control valve means for fluid pressure operated apparatus
FR851272A FR1280933A (en) 1959-10-29 1961-01-31 Hydraulic control unit
DEH41639A DE1214961B (en) 1959-10-29 1961-02-03 Control device for double-acting hydraulic cylinders with means to prevent cavitation

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB3674959A GB915115A (en) 1959-10-29 1959-10-29 Improvements in control valve means for fluid pressure operated apparatus

Publications (1)

Publication Number Publication Date
GB915115A true GB915115A (en) 1963-01-09

Family

ID=10390899

Family Applications (1)

Application Number Title Priority Date Filing Date
GB3674959A Expired GB915115A (en) 1958-09-18 1959-10-29 Improvements in control valve means for fluid pressure operated apparatus

Country Status (1)

Country Link
GB (1) GB915115A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1500174B1 (en) * 1964-07-17 1970-08-20 New York Air Brake Co Distributor valve

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1500174B1 (en) * 1964-07-17 1970-08-20 New York Air Brake Co Distributor valve

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