GB883014A - Improvements in or relating to hydraulic remote control arrangements - Google Patents

Improvements in or relating to hydraulic remote control arrangements

Info

Publication number
GB883014A
GB883014A GB5256/58A GB525658A GB883014A GB 883014 A GB883014 A GB 883014A GB 5256/58 A GB5256/58 A GB 5256/58A GB 525658 A GB525658 A GB 525658A GB 883014 A GB883014 A GB 883014A
Authority
GB
United Kingdom
Prior art keywords
spring
line
pressure
valve
spool
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
GB5256/58A
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.)
STABILIMENTI ELETTROMECCANICI RIUNITI ANSALDO-SAN GIORGIO SpA
Original Assignee
STABILIMENTI ELETTROMECCANICI RIUNITI ANSALDO-SAN GIORGIO SpA
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 STABILIMENTI ELETTROMECCANICI RIUNITI ANSALDO-SAN GIORGIO SpA filed Critical STABILIMENTI ELETTROMECCANICI RIUNITI ANSALDO-SAN GIORGIO SpA
Publication of GB883014A publication Critical patent/GB883014A/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
    • F15B11/00—Servomotor systems without provision for follow-up action; Circuits therefor
    • F15B11/08—Servomotor systems without provision for follow-up action; Circuits therefor with only one servomotor
    • F15B11/10—Servomotor systems without provision for follow-up action; Circuits therefor with only one servomotor in which the servomotor position is a function of the pressure also pressure regulators as operating means for such systems, the device itself may be a position indicating system

Landscapes

  • Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • Fluid Mechanics (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Servomotors (AREA)

Abstract

883,014. Fluid-pressure servomotor-control systems; valves. STABILIMENTI ELETTROMECCANNICI RIUNITI ANSALDO-SAN GIORGIO S.p.A. Feb. 18, 1958 [March 30, 19571, No. 5256/58. Classes 69 (2) and 135. An hydraulic system comprises an actuator piston displaceable against spring-loading by hydraulic pressure controlled by a pressure regulating valve having a spool subject in one direction to the said pressure and in the opposite direction to an adjustable spring loading. As shown in Figs. 1 and 2, a valve spool 12 controls the connection of a line 2 with an inlet line 1 and an exhaust line 3. Spool 12 is loaded by a spring 17 adjustable by screw 16 and is subject to the pressure in line 2 acting in a chamber 5. Line 2 leads to a single acting piston 21. As shown in Figs. 3, 4 and 6, an actuator 18 has a piston 21 urged to a central position by a spring 23 disposed inside the hollow piston which slides over a stationary rod 30. Spring 23 co-operates with abutments on the rod 30, and the rod has a bore 33 leading to exhaust. Lines 2<SP>1</SP>, 211 lead to a control valve V which has a spool 12 loaded by a spring 17 and subject to the pressure in a chamber 5. Chamber 5 is connected, through a reversing valve 26, selectively to line 2<SP>1</SP> or 2<SP>11</SP>, the other line being connected to exhaust via this valve. Valve 26 has a central position in which both lines 2<SP>1</SP>, 211 are connected to exhaust. Rotating the valve to connect one of the lines to pressure also, through a pin and groove and slot connection adjusts the height of a spindle 27 to increase the spring-loading on spool 12. Liquid is admitted through line 2<SP>1</SP> or 211 to one side of piston 21, liquid from the other side passing to exhaust through a passage 20<SP>1</SP> or 20<SP>11</SP>, a port 32 in the piston, and bore 33. Spring 23 is compressed until the pressure rises sufficiently to allow spool 12 to be restored to its neutral position.
GB5256/58A 1957-03-30 1958-02-18 Improvements in or relating to hydraulic remote control arrangements Expired GB883014A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
IT883014X 1957-03-30

Publications (1)

Publication Number Publication Date
GB883014A true GB883014A (en) 1961-11-22

Family

ID=11331110

Family Applications (1)

Application Number Title Priority Date Filing Date
GB5256/58A Expired GB883014A (en) 1957-03-30 1958-02-18 Improvements in or relating to hydraulic remote control arrangements

Country Status (1)

Country Link
GB (1) GB883014A (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3179061A (en) * 1962-02-23 1965-04-20 Weatherhead Co Variable displacement pump control
US4271749A (en) * 1978-12-21 1981-06-09 The Boeing Company Reduced back pressure, anti-cavitation valve system

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3179061A (en) * 1962-02-23 1965-04-20 Weatherhead Co Variable displacement pump control
US4271749A (en) * 1978-12-21 1981-06-09 The Boeing Company Reduced back pressure, anti-cavitation valve system

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