GB698801A - Improvements in or relating to control systems for reversible hydraulic motors - Google Patents

Improvements in or relating to control systems for reversible hydraulic motors

Info

Publication number
GB698801A
GB698801A GB9987/50A GB998750A GB698801A GB 698801 A GB698801 A GB 698801A GB 9987/50 A GB9987/50 A GB 9987/50A GB 998750 A GB998750 A GB 998750A GB 698801 A GB698801 A GB 698801A
Authority
GB
United Kingdom
Prior art keywords
valve
passage
ports
chamber
motor
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
GB9987/50A
Inventor
Francis Benjamin Levetus
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.)
Keelavite Co Ltd
Original Assignee
Keelavite Co 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 Keelavite Co Ltd filed Critical Keelavite Co Ltd
Priority to GB9987/50A priority Critical patent/GB698801A/en
Priority to US234067A priority patent/US2624321A/en
Publication of GB698801A publication Critical patent/GB698801A/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
    • F15B13/0416—Fluid distribution or supply devices characterised by their adaptation to the control of servomotors for use with a single servomotor with means or adapted for load sensing
    • F15B13/0417—Load sensing elements; Internal fluid connections therefor; Anti-saturation or pressure-compensation valves
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T137/00—Fluid handling
    • Y10T137/8593—Systems
    • Y10T137/87169—Supply and exhaust
    • Y10T137/87177—With bypass

Landscapes

  • Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • Fluid Mechanics (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Fluid-Pressure Circuits (AREA)
  • Safety Valves (AREA)

Abstract

698,801. Hydraulic machines: hydraulic couplings. KEELAVITE CO., Ltd. June 8, 1951 [April 24, 1950], No. 9987/50. Class 69(ii) A control system for a reversible hydraulic motor G<SP>4</SP> having inlet and outlet ports G<SP>2</SP>, G<SP>3</SP> the functions of which may be reversed to reverse the motor, comprises a pressure supply passage A from a pump A<SP>1</SP>, connected to a port E of a reversing valve E<SP>1</SP>, having ports E<SP>4</SP>, E<SP>5</SP> connected to the motor G<SP>4</SP> and ports E<SP>2</SP>, E<SP>3</SP> connected to a relief passage F connected to a reservoir F<SP>1</SP>, and arranged so that in neutral position it connects each of the motor ports E<SP>4</SP>, E<SP>5</SP> to the passage F and when moved in either direction it progressively disconnects one or other of the ports E<SP>4</SP>, E<SP>5</SP> from the passage F and connects it to the port E. A pressure responsive relief valve in the passage A has a member B responsive to the pressure difference between a chamber Q<SP>4</SP> connected to the passage A and a chamber Q<SP>5</SP> connected to one or other of the ports G<SP>2</SP>, G<SP>3</SP> through an automatic change-over valve H<SP>2</SP> which connects the chamber Q<SP>5</SP> to whichever of the two motor ports is at the moment at the higher pressure. The relief valve comprises a piston member B' and a coaxial valve member B<SP>1</SP> communicating with the passage F. The change over valve H<SP>2</SP> comprises a chamber having two valve seats H<SP>3</SP>, H<SP>4</SP> connected to the motor ports G<SP>2</SP>, G<SP>3</SP> either of which may be closed by a ball valve H<SP>1</SP>; the chamber is connected by a pipe J and a leak orifice K to the chamber Q<SP>5</SP> and through a spring pressed ball valve L to the passage F. The valves E<SP>1</SP>, B, L are mounted in a single block M, Fig. 5, the valve E<SP>1</SP> comprising recesses N, N<SP>4</SP> connected to the pasage F, recesses N<SP>1</SP>, N<SP>3</SP> connected to the ports G<SP>2</SP>, G<SP>3</SP> and a recess N<SP>2</SP> connected to the passage A. The recesses N-N<SP>4</SP> are controlled by a hand controlled valve O having a waisted portion O<SP>2</SP> with frusto-conical extensions O<SP>5</SP> which give a rate of progressive opening and closing of the inlet and outlet recesses N<SP>1</SP>, N<SP>3</SP> substantially in proportion to the movement of the valve O. Channels O<SP>4</SP> connect the ports N<SP>3</SP>, N<SP>4</SP> and N, N' when the valve O is in the neutral position. A spring pressed valve Q<SP>2</SP> on the piston B<SP>3</SP> permits excessive pressure in the chamber Q<SP>4</SP> to vent to the passage F through the valve L.
GB9987/50A 1950-04-24 1950-04-24 Improvements in or relating to control systems for reversible hydraulic motors Expired GB698801A (en)

Priority Applications (2)

Application Number Priority Date Filing Date Title
GB9987/50A GB698801A (en) 1950-04-24 1950-04-24 Improvements in or relating to control systems for reversible hydraulic motors
US234067A US2624321A (en) 1950-04-24 1951-06-28 Control system for reversible hydraulic motors

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB9987/50A GB698801A (en) 1950-04-24 1950-04-24 Improvements in or relating to control systems for reversible hydraulic motors

Publications (1)

Publication Number Publication Date
GB698801A true GB698801A (en) 1953-10-21

Family

ID=9882452

Family Applications (1)

Application Number Title Priority Date Filing Date
GB9987/50A Expired GB698801A (en) 1950-04-24 1950-04-24 Improvements in or relating to control systems for reversible hydraulic motors

Country Status (2)

Country Link
US (1) US2624321A (en)
GB (1) GB698801A (en)

Families Citing this family (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2921560A (en) * 1957-09-23 1960-01-19 New York Air Brake Co Engine control
US2942583A (en) * 1958-03-03 1960-06-28 New York Air Brake Co Pressure graduating control valve
US4123964A (en) * 1972-12-18 1978-11-07 Langen & Co. Pressure control means for distribution of medium from a reservoir or storage vessel
DE2409739C3 (en) * 1974-03-01 1980-02-07 Danfoss A/S, Nordborg (Daenemark) Hydraulic steering device for vehicles
US4142842A (en) * 1974-09-09 1979-03-06 Caterpillar Tractor Co. Dual source hydraulic steering system
US4037621A (en) * 1975-11-26 1977-07-26 Tadeusz Budzich Load responsive control valve with constant leakage device
USRE30828E (en) * 1975-11-26 1981-12-22 Load responsive valve with constant leakage device
US4838024A (en) * 1986-11-19 1989-06-13 Honda Giken Kogyo Kabushiki Kaisha Hydraulically operated continuously variable transmission
JPS63149471A (en) * 1986-12-12 1988-06-22 Honda Motor Co Ltd Hydraulic power transmission device

Family Cites Families (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2057088A (en) * 1933-02-20 1936-10-13 Galion Iron Works And Mfg Comp Fluid pressure controlling valve
US2503870A (en) * 1946-05-03 1950-04-11 Vickers Inc Flow regulating device

Also Published As

Publication number Publication date
US2624321A (en) 1953-01-06

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