GB1012961A - Improvements in pneumatic control valves - Google Patents

Improvements in pneumatic control valves

Info

Publication number
GB1012961A
GB1012961A GB4241563A GB4241563A GB1012961A GB 1012961 A GB1012961 A GB 1012961A GB 4241563 A GB4241563 A GB 4241563A GB 4241563 A GB4241563 A GB 4241563A GB 1012961 A GB1012961 A GB 1012961A
Authority
GB
United Kingdom
Prior art keywords
spool
brake
air
port
chamber
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
GB4241563A
Inventor
Thomas William Hamilton
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.)
HAMILTON CONTROLLERS Ltd
Original Assignee
HAMILTON CONTROLLERS 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 HAMILTON CONTROLLERS Ltd filed Critical HAMILTON CONTROLLERS Ltd
Priority to GB4241563A priority Critical patent/GB1012961A/en
Publication of GB1012961A publication Critical patent/GB1012961A/en
Expired legal-status Critical Current

Links

Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60T—VEHICLE BRAKE CONTROL SYSTEMS OR PARTS THEREOF; BRAKE CONTROL SYSTEMS OR PARTS THEREOF, IN GENERAL; ARRANGEMENT OF BRAKING ELEMENTS ON VEHICLES IN GENERAL; PORTABLE DEVICES FOR PREVENTING UNWANTED MOVEMENT OF VEHICLES; VEHICLE MODIFICATIONS TO FACILITATE COOLING OF BRAKES
    • B60T13/00—Transmitting braking action from initiating means to ultimate brake actuator with power assistance or drive; Brake systems incorporating such transmitting means, e.g. air-pressure brake systems
    • B60T13/10—Transmitting braking action from initiating means to ultimate brake actuator with power assistance or drive; Brake systems incorporating such transmitting means, e.g. air-pressure brake systems with fluid assistance, drive, or release
    • B60T13/24—Transmitting braking action from initiating means to ultimate brake actuator with power assistance or drive; Brake systems incorporating such transmitting means, e.g. air-pressure brake systems with fluid assistance, drive, or release the fluid being gaseous
    • B60T13/26—Compressed-air systems
    • B60T13/36—Compressed-air systems direct, i.e. brakes applied directly by compressed air
    • 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
    • F15B13/042—Fluid distribution or supply devices characterised by their adaptation to the control of servomotors for use with a single servomotor operated by fluid pressure

Abstract

1,012,961. Valves ; pneumatic brakes. HAMILTON CONTROLLERS Ltd. Nov. 11, 1964 [Oct. 28, 1963], No. 42415/63. Headings F2F and F2V. A pneumatically operated two-position spool valve suitable for controlling the supply of air to a disc brake is operated by a high pressure air supply and has auxiliary valve means for reducing the pressure of this supply so that it may also be used to actuate the brake. In the embodiment shown in Fig. 1, a spool 5 is slidable within 0-rings 10 held spaced apart by spacers 9, and has a hollow end 7 co-operating with a stationary piston 11-15, air being admitted to the interior 8 from a high pressure inlet 20 via a port 17 and passages 16, 15 to urge the spool to the left. The other end of passage 16 leads to a port 18 which is connected, via a solenoidoperated valve (not shown), to a port 19 leading to a chamber in which works the other end 6 of the spool 5. The inlet 20 is connected, with the spool positioned as shown, to a chamber 21 (via a port, not shown) having an outlet 29 leading to the brake. A closure member 23, located in chamber 21, co-operates with a seat 28 and is connected to a piston 22, 26 which is acted upon by air at a reference pressure admitted at 25 to urge the member 23 to the open position, the reference pressure being that pressure required to operate the brake. In operation, with the brake disengaged and the solenoid valve de-energized the closure member 23 is in the open position and the connection between ports 18 and 19 is closed, and since port 19 is connected to atmosphere via the solenoid valve the spool is urged to the position shown by air in the chamber 8. Air consequently flows from the inlet 20 to the outlet 29 to engage the brake until the pressure in the outlet slightly exceeds the said reference pressure, at which time the piston 22, 26 is moved to seat the closure member. With the closure member seated, any make-up required at the brake, e.g. due to leakage, is provided from port 25 via a passage 27 by-passing the piston. To release the brake, the solenoid valve is energized to admit air from the inlet to act on the left-hand end 6 of the spool to move it to the right, the end 6 having a larger effective area than the interior of the end 7. With the spool in this position, the inlet 20 is cut off and the chamber 21 is connected to exhaust ports 31, so that the closure member is opened by the reference pressure acting on the piston 22, 26 and the outlet 29 is then connected to exhaust.
GB4241563A 1963-10-28 1963-10-28 Improvements in pneumatic control valves Expired GB1012961A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
GB4241563A GB1012961A (en) 1963-10-28 1963-10-28 Improvements in pneumatic control valves

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB4241563A GB1012961A (en) 1963-10-28 1963-10-28 Improvements in pneumatic control valves

Publications (1)

Publication Number Publication Date
GB1012961A true GB1012961A (en) 1965-12-15

Family

ID=10424310

Family Applications (1)

Application Number Title Priority Date Filing Date
GB4241563A Expired GB1012961A (en) 1963-10-28 1963-10-28 Improvements in pneumatic control valves

Country Status (1)

Country Link
GB (1) GB1012961A (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4552180A (en) * 1983-01-10 1985-11-12 Mayer James R Pilot operated control valve for hydraulically actuated reciprocating pump
WO2000014414A1 (en) * 1998-09-09 2000-03-16 Robert Bosch Gmbh Pulse-actuated pneumatic 4/2 directional valve

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4552180A (en) * 1983-01-10 1985-11-12 Mayer James R Pilot operated control valve for hydraulically actuated reciprocating pump
WO2000014414A1 (en) * 1998-09-09 2000-03-16 Robert Bosch Gmbh Pulse-actuated pneumatic 4/2 directional valve

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