GB504278A - Improved safety device for hydraulic transmission - Google Patents

Improved safety device for hydraulic transmission

Info

Publication number
GB504278A
GB504278A GB28475/37A GB2847537A GB504278A GB 504278 A GB504278 A GB 504278A GB 28475/37 A GB28475/37 A GB 28475/37A GB 2847537 A GB2847537 A GB 2847537A GB 504278 A GB504278 A GB 504278A
Authority
GB
United Kingdom
Prior art keywords
piston
valve
brakes
conduit
cylinder
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
GB28475/37A
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.)
Gamain SA Des Atel
Original Assignee
Gamain SA Des Atel
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 Gamain SA Des Atel filed Critical Gamain SA Des Atel
Publication of GB504278A publication Critical patent/GB504278A/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
    • B60T11/00—Transmitting braking action from initiating means to ultimate brake actuator without power assistance or drive or where such assistance or drive is irrelevant
    • B60T11/10—Transmitting braking action from initiating means to ultimate brake actuator without power assistance or drive or where such assistance or drive is irrelevant transmitting by fluid means, e.g. hydraulic
    • B60T11/28—Valves specially adapted therefor
    • B60T11/32—Automatic cut-off valves for defective pipes
    • B60T11/323—Automatic cut-off valves for defective pipes in hydraulic systems

Landscapes

  • Engineering & Computer Science (AREA)
  • Transportation (AREA)
  • Mechanical Engineering (AREA)
  • Valves And Accessory Devices For Braking Systems (AREA)
  • Braking Arrangements (AREA)
  • Gear-Shifting Mechanisms (AREA)

Abstract

504,278. Hydraulic transmission of power. SOC. ANON. DES ATELIERS GAMAIN. Oct. 19, 1937, Nos. 28475, 28476, 28477, and 28478. Convention dates, Oct. 19, 1936, March 1, 1937, July 16, 1937, and Oct. 6, 1937. [Class 69 (ii)] [Also in Group XXXIV] Hydraulic transmission particularly for brakes comprises a device in each conduit leading to the brakes arranged to close this conduit from the rest of the system in case of leakage and also adapted to adjust the system for wear. The device comprises a piston 2 containing valves which provide communication between the pipe 17 connected to the master cylinder and the pipe 12 connected to the brake when the piston is at the end of its cylinder 1 nearest the brakes when the pressure difference between the two pipes does not exceed a predetermined value. The piston 2 is forced from one end of the cylinder 1 to the other at each brake application and if wear has occurred the piston stroke increases and a hollow rod 8 engages the end of the cylinder, opens a valve 6 and allows liquid to pass through the piston, to take up the wear. If leakage occurs in the pipe 12, pressure above a piston 14 drops to zero and the pressure below this piston transmitted from the master cylinder via a passage 18 raises the piston and closes the conduit 12 by means of a valve 13. The valve 13 will remain on its seat after release of the brakes if a slight pressure is maintained on the fluid in conduit 17. In a modification, when leakage occurs the rod 8 abuts the end of the cylinder, opens the valve 6, causes cups 26, 27 to abut and holds the valve 5 on its seat to close off the conduit 12. In a further modification the ball valves and cups are replaced by a single ball valve pressed towards the rod 8 by a spring and in a still further modification this ball is replaced by two valves telescoped together. This modification is adapted to release back to the master cylinder excess liquid which may have been forced to the brakes owing to expansion of the brake drums.
GB28475/37A 1936-10-19 1937-10-19 Improved safety device for hydraulic transmission Expired GB504278A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
BE504278X 1936-10-19

Publications (1)

Publication Number Publication Date
GB504278A true GB504278A (en) 1939-04-19

Family

ID=3870864

Family Applications (1)

Application Number Title Priority Date Filing Date
GB28475/37A Expired GB504278A (en) 1936-10-19 1937-10-19 Improved safety device for hydraulic transmission

Country Status (3)

Country Link
BE (1) BE418012A (en)
DE (1) DE694751C (en)
GB (1) GB504278A (en)

Cited By (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2467517A (en) * 1946-01-04 1949-04-19 Midland Steel Prod Co Power unit for hydraulic brakes
US2523172A (en) * 1948-07-24 1950-09-19 Wilson Palmer Clyde Adjustment mechanism for hydraulic brakes
US2544849A (en) * 1946-01-23 1951-03-13 Bendix Aviat Corp Hydraulic brake automatic adjuster
US2551081A (en) * 1950-02-24 1951-05-01 Cruz R Alvarez Automatic hydraulic brake adjuster
US2583825A (en) * 1950-02-23 1952-01-29 Arthur J Felt Hydraulic brake safety device
US2593192A (en) * 1945-10-06 1952-04-15 Borg Warner Accessory hydraulic adjuster
US2926499A (en) * 1958-03-14 1960-03-01 Goodrich Co B F Hydraulic mechanism
US2972865A (en) * 1959-05-11 1961-02-28 Chicago Railway Equipment Co Fluid pressure take-up
US2974493A (en) * 1959-08-13 1961-03-14 Goodyear Tire & Rubber Displacement saver

Cited By (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2593192A (en) * 1945-10-06 1952-04-15 Borg Warner Accessory hydraulic adjuster
US2467517A (en) * 1946-01-04 1949-04-19 Midland Steel Prod Co Power unit for hydraulic brakes
US2544849A (en) * 1946-01-23 1951-03-13 Bendix Aviat Corp Hydraulic brake automatic adjuster
US2523172A (en) * 1948-07-24 1950-09-19 Wilson Palmer Clyde Adjustment mechanism for hydraulic brakes
US2583825A (en) * 1950-02-23 1952-01-29 Arthur J Felt Hydraulic brake safety device
US2551081A (en) * 1950-02-24 1951-05-01 Cruz R Alvarez Automatic hydraulic brake adjuster
US2926499A (en) * 1958-03-14 1960-03-01 Goodrich Co B F Hydraulic mechanism
US2972865A (en) * 1959-05-11 1961-02-28 Chicago Railway Equipment Co Fluid pressure take-up
US2974493A (en) * 1959-08-13 1961-03-14 Goodyear Tire & Rubber Displacement saver

Also Published As

Publication number Publication date
DE694751C (en) 1940-08-07
BE418012A (en)

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