GB556725A - Improvements in fluid operated servo motors for operating brakes - Google Patents

Improvements in fluid operated servo motors for operating brakes

Info

Publication number
GB556725A
GB556725A GB972342A GB972342A GB556725A GB 556725 A GB556725 A GB 556725A GB 972342 A GB972342 A GB 972342A GB 972342 A GB972342 A GB 972342A GB 556725 A GB556725 A GB 556725A
Authority
GB
United Kingdom
Prior art keywords
valve
operated
piston
sleeve
pressure
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
GB972342A
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.)
FODENS Ltd
Original Assignee
FODENS 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 FODENS Ltd filed Critical FODENS Ltd
Priority to GB972342A priority Critical patent/GB556725A/en
Publication of GB556725A publication Critical patent/GB556725A/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
    • B60T13/12—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 liquid
    • B60T13/16—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 liquid using pumps directly, i.e. without interposition of accumulators or reservoirs

Landscapes

  • Engineering & Computer Science (AREA)
  • Transportation (AREA)
  • Mechanical Engineering (AREA)
  • Braking Systems And Boosters (AREA)

Abstract

556,725. Fluid-pressure servomotor-control systems. FODENS, Ltd., FODEN, W., and TWEMLOW, E. July 13, 1942, No. 9723. [Class 133] [Also in Group XXXIV] In hydraulic brake systems of the kind in which pressure acting against a brake operating piston is built up by throttling the delivery of a pump by a hand- or foot-operated valve, the throttling is effected between this valve and a sleeve, the other end of which forms a byepass valve which, when it is unseated by the development of a pressure above a predetermined maximum, byepasses liquid from the pressure side of the piston and by engaging the manually-operated valve increases the hydraulic reaction on that valve. As shown, the manually-operated valve a is slidable in a sleeve c slidable in the stem g of a brake operating piston e, the cylinder of which is connected to the pump b. The end c<SP>1</SP> of the sleeve forms an annular valve normally seated by a spring c<SP>2</SP>. To operate the brake, the delivery from the pump is throttled at'd by movement of the valve a and if the hydraulic pressure which builds up against the piston e and the sleeve c is sufficient, the valve c<SP>1</SP> is unseated to byepass liquid through the passage f and may engage the valve a thus increasing the reaction on the pedal by which the valve a is operated. If the hydraulic pressure should fail the piston e may be mechaiiically operated by the pedal through the valve a
GB972342A 1942-07-13 1942-07-13 Improvements in fluid operated servo motors for operating brakes Expired GB556725A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
GB972342A GB556725A (en) 1942-07-13 1942-07-13 Improvements in fluid operated servo motors for operating brakes

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB972342A GB556725A (en) 1942-07-13 1942-07-13 Improvements in fluid operated servo motors for operating brakes

Publications (1)

Publication Number Publication Date
GB556725A true GB556725A (en) 1943-10-19

Family

ID=9877520

Family Applications (1)

Application Number Title Priority Date Filing Date
GB972342A Expired GB556725A (en) 1942-07-13 1942-07-13 Improvements in fluid operated servo motors for operating brakes

Country Status (1)

Country Link
GB (1) GB556725A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4467700A (en) * 1979-01-17 1984-08-28 Nissan Motor Company, Limited Hydraulic boost mechanism

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4467700A (en) * 1979-01-17 1984-08-28 Nissan Motor Company, Limited Hydraulic boost mechanism

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