GB988237A - Improved fluid pressure apparatus - Google Patents

Improved fluid pressure apparatus

Info

Publication number
GB988237A
GB988237A GB1444061A GB1444061A GB988237A GB 988237 A GB988237 A GB 988237A GB 1444061 A GB1444061 A GB 1444061A GB 1444061 A GB1444061 A GB 1444061A GB 988237 A GB988237 A GB 988237A
Authority
GB
United Kingdom
Prior art keywords
valves
spaces
space
pistons
control valves
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
GB1444061A
Inventor
John Kammerer Harding
Albert Frederick Lacey
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.)
Dowty Technical Developments Ltd
Original Assignee
Dowty Technical Developments 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 Dowty Technical Developments Ltd filed Critical Dowty Technical Developments Ltd
Priority to GB1444061A priority Critical patent/GB988237A/en
Publication of GB988237A publication Critical patent/GB988237A/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
    • 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
    • F15B2211/00—Circuits for servomotor systems
    • F15B2211/30—Directional control
    • F15B2211/305—Directional control characterised by the type of valves
    • F15B2211/30505—Non-return valves, i.e. check valves
    • 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
    • F15B2211/00—Circuits for servomotor systems
    • F15B2211/30—Directional control
    • F15B2211/305—Directional control characterised by the type of valves
    • F15B2211/3056—Assemblies of multiple valves
    • F15B2211/30565—Assemblies of multiple valves having multiple valves for a single output member, e.g. for creating higher valve function by use of multiple valves like two 2/2-valves replacing a 5/3-valve
    • F15B2211/3057—Assemblies of multiple valves having multiple valves for a single output member, e.g. for creating higher valve function by use of multiple valves like two 2/2-valves replacing a 5/3-valve having two valves, one for each port of a double-acting output member
    • 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
    • F15B2211/00—Circuits for servomotor systems
    • F15B2211/30—Directional control
    • F15B2211/315—Directional control characterised by the connections of the valve or valves in the circuit
    • F15B2211/3157—Directional control characterised by the connections of the valve or valves in the circuit being connected to a pressure source, an output member and a return line
    • F15B2211/31576—Directional control characterised by the connections of the valve or valves in the circuit being connected to a pressure source, an output member and a return line having a single pressure source and a single output member
    • 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
    • F15B2211/00—Circuits for servomotor systems
    • F15B2211/30—Directional control
    • F15B2211/315—Directional control characterised by the connections of the valve or valves in the circuit
    • F15B2211/3157—Directional control characterised by the connections of the valve or valves in the circuit being connected to a pressure source, an output member and a return line
    • F15B2211/31588—Directional control characterised by the connections of the valve or valves in the circuit being connected to a pressure source, an output member and a return line having a single pressure source and multiple output members
    • 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
    • F15B2211/00—Circuits for servomotor systems
    • F15B2211/30—Directional control
    • F15B2211/32—Directional control characterised by the type of actuation
    • F15B2211/327—Directional control characterised by the type of actuation electrically or electronically
    • 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
    • F15B2211/00—Circuits for servomotor systems
    • F15B2211/70—Output members, e.g. hydraulic motors or cylinders or control therefor
    • F15B2211/705—Output members, e.g. hydraulic motors or cylinders or control therefor characterised by the type of output members or actuators
    • F15B2211/7051—Linear output members
    • F15B2211/7053—Double-acting output members
    • 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
    • F15B2211/00—Circuits for servomotor systems
    • F15B2211/70—Output members, e.g. hydraulic motors or cylinders or control therefor
    • F15B2211/705—Output members, e.g. hydraulic motors or cylinders or control therefor characterised by the type of output members or actuators
    • F15B2211/7051—Linear output members
    • F15B2211/7053—Double-acting output members
    • F15B2211/7054—Having equal piston areas

Landscapes

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

Abstract

988,237. Mineral-mining machines. DOWTY TECHNICAL DEVELOPMENTS Ltd. April 19, 1962 [April 21, 1961], No. 14440/61. Heading E1F. [Also in Division F1] A double-acting fluid pressure ram or the equivalent which may have pads fitted to the ends of its rods 3, 4, Fig. 1 for engaging the side walls of a tunnel to guide the cutting head of a coal-cutting machine comprises a pair of non-return valves 16, 17 connected one to each working space 5, 6 of the ram and adapted to supply fluid at high pressure to each space, and a pair of control valves 9, 11 also connected one to each working space and each capable of closing or opening to retain or vent high pressure fluid within its associated working space. Both control valves are solenoid operated and in their unenergized condition fluid is prevented from leaving the working spaces 5, 6 by the non-return valves 16, 17. If one or the other of the control valves is energized, the associated working space is connected to a reservoir line 13 or 15 so that fluid pressure from a line 18 passes through one of the non-return valves to the other space to move the piston or, alternatively, the cylinder. In another embodiment having two rams 21, 22 Fig. 2 having pistons 23, 29 with different sized rods 25, 26, 32, 34, the spaces 27, 33 associated with the larger sized rods are connected by a common pipe 36, control valve 37 and non-return valve 41 to a line 42 from a high pressure source. The line 42 is also connected by non-return valves 47, 53 and control valves 44, 49 to the spaces 28, 35 associated with the smaller-sized rods. With all control valves unenergized, the pistons are locked in position. Energization of the solenoid controlling valve 37 vents the spaces 27 and 33 so that the pistons move towards each other. Energization of the solenoid controlling valve 44 or 49 will vent the associated space 28 or 35 to cause outward movement of piston 23 or 29. When the solenoids controlling both valves 44, 49 are energized, both pistons will move outwardly. In other embodiments, the rams may have diaphragms or bellows to define the working spaces.
GB1444061A 1961-04-21 1961-04-21 Improved fluid pressure apparatus Expired GB988237A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
GB1444061A GB988237A (en) 1961-04-21 1961-04-21 Improved fluid pressure apparatus

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB1444061A GB988237A (en) 1961-04-21 1961-04-21 Improved fluid pressure apparatus

Publications (1)

Publication Number Publication Date
GB988237A true GB988237A (en) 1965-04-07

Family

ID=10041235

Family Applications (1)

Application Number Title Priority Date Filing Date
GB1444061A Expired GB988237A (en) 1961-04-21 1961-04-21 Improved fluid pressure apparatus

Country Status (1)

Country Link
GB (1) GB988237A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3104704A1 (en) * 1981-02-10 1982-08-26 Per Henrik Gösta 59030 Borensberg Nyström Servo arrangement

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3104704A1 (en) * 1981-02-10 1982-08-26 Per Henrik Gösta 59030 Borensberg Nyström Servo arrangement

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