GB911661A - Improvements in hydraulically powered machines and control valves therefor - Google Patents

Improvements in hydraulically powered machines and control valves therefor

Info

Publication number
GB911661A
GB911661A GB3893457A GB3893457A GB911661A GB 911661 A GB911661 A GB 911661A GB 3893457 A GB3893457 A GB 3893457A GB 3893457 A GB3893457 A GB 3893457A GB 911661 A GB911661 A GB 911661A
Authority
GB
United Kingdom
Prior art keywords
plunger
valve
ports
return
depressed
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
GB3893457A
Inventor
Leslie Alfred Collis
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.)
Collis & Sons Ltd J
Original Assignee
Collis & Sons Ltd J
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 Collis & Sons Ltd J filed Critical Collis & Sons Ltd J
Priority to GB3893457A priority Critical patent/GB911661A/en
Publication of GB911661A publication Critical patent/GB911661A/en
Expired legal-status Critical Current

Links

Classifications

    • 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)
  • Physics & Mathematics (AREA)
  • Fluid Mechanics (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Forklifts And Lifting Vehicles (AREA)
  • Fluid-Pressure Circuits (AREA)

Abstract

911,661. Pallet trucks. COLLIS & SONS Ltd., J. Dec. 15, 1958 [Dec. 13, 1957], No. 38934/57. Class 78 (3). [Also in Group XXIX] In an hydraulic motor-operated machine, e.g. a load handling machine, press or jack, a three-way selector control valve unit comprises a non - return valve V4, V23, Fig. 2, controlling flow between a supply port B and a discharge port D and a similar non-return valve V12, V25 controlling flow between the supply port B and an outlet port C. The ports B, C, D are in a body A which has a two-diameter opening accommodating the two-part valve unit V having ports VB, VC, VA which register with body ports B, C, and D, respectively, the ports VA and VB being covered with oil filters V18, V17, respectively. The seats V23, V25 of the non-return valves are of truncated hollow form. A thrustrod V13 having flattened sides is located between the valve members V4, V12 and there is provided a plunger control member V5 which is bored to receive a spring V20 which acts on a thrust-rod V22 for controlling the valve member V4. The plunger V5 is operated against the action of a returnspring V6. The valve may be used with an operator-operated pump or a variable-speed pressure type pump or with a pump of the independent constant-speed and/or constant pressure type. The plunger V5 can be depressed by varying extents to effect the necessary port connections for motor operation. If the plunger is depressed to open both valves completely the valve unit is then in the neutral unloaded position. The plunger V5 may be depressed to a position which locates the ball V4 or both balls V4, V12 in their conical seats V23, V25 so that they effect a metering control and thus determine the speed at which the motor operates. When the plunger V5 is fully withdrawn the balls V4, V12 operate in non- return manner. As described, the selector valve is used to control the operation of the platform of an hydraulic truck or stacker.
GB3893457A 1957-12-13 1957-12-13 Improvements in hydraulically powered machines and control valves therefor Expired GB911661A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
GB3893457A GB911661A (en) 1957-12-13 1957-12-13 Improvements in hydraulically powered machines and control valves therefor

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB3893457A GB911661A (en) 1957-12-13 1957-12-13 Improvements in hydraulically powered machines and control valves therefor

Publications (1)

Publication Number Publication Date
GB911661A true GB911661A (en) 1962-11-28

Family

ID=10406577

Family Applications (1)

Application Number Title Priority Date Filing Date
GB3893457A Expired GB911661A (en) 1957-12-13 1957-12-13 Improvements in hydraulically powered machines and control valves therefor

Country Status (1)

Country Link
GB (1) GB911661A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3547595A (en) * 1966-02-15 1970-12-15 Air Liquide Process for the continuous preparation of crystalline substances

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3547595A (en) * 1966-02-15 1970-12-15 Air Liquide Process for the continuous preparation of crystalline substances

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