GB2019970A - Parking brake valve - Google Patents

Parking brake valve

Info

Publication number
GB2019970A
GB2019970A GB7914160A GB7914160A GB2019970A GB 2019970 A GB2019970 A GB 2019970A GB 7914160 A GB7914160 A GB 7914160A GB 7914160 A GB7914160 A GB 7914160A GB 2019970 A GB2019970 A GB 2019970A
Authority
GB
United Kingdom
Prior art keywords
brake
pressure
hand
brake valve
parking brake
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.)
Granted
Application number
GB7914160A
Other versions
GB2019970B (en
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.)
Continental Teves AG and Co OHG
Original Assignee
Alfred Teves GmbH
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 Alfred Teves GmbH filed Critical Alfred Teves GmbH
Publication of GB2019970A publication Critical patent/GB2019970A/en
Application granted granted Critical
Publication of GB2019970B publication Critical patent/GB2019970B/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
    • B60T13/22—Brakes applied by springs or weights and released hydraulically

Landscapes

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

Abstract

A hand-brake valve for a vehicle hydraulic brake system of the kind in which hydraulic pressure keeps a spring-actuated brake (3) in a released position, includes a pressure- balanced control spool (16) against which bears a hand-brake lever (2) and a reaction piston (26) having two opposed effective areas (27, 28). The reaction piston is permanently exposed to the pressure from the fluid source (4) which urges the spool towards the brake release position, and in the opposite direction, it is exposed to the brake pressure in the chamber (20). This permits sensitive actuation of the brake. <IMAGE>
GB7914160A 1978-04-27 1979-04-24 Parking brake valve Expired GB2019970B (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE19782818532 DE2818532A1 (en) 1978-04-27 1978-04-27 HAND BRAKE VALVE FOR A HYDRAULIC VEHICLE BRAKE SYSTEM

Publications (2)

Publication Number Publication Date
GB2019970A true GB2019970A (en) 1979-11-07
GB2019970B GB2019970B (en) 1982-03-24

Family

ID=6038177

Family Applications (1)

Application Number Title Priority Date Filing Date
GB7914160A Expired GB2019970B (en) 1978-04-27 1979-04-24 Parking brake valve

Country Status (6)

Country Link
DE (1) DE2818532A1 (en)
ES (1) ES242934Y (en)
FR (1) FR2424161A1 (en)
GB (1) GB2019970B (en)
IT (1) IT1112883B (en)
SE (1) SE437802B (en)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2003106819A1 (en) * 2002-06-17 2003-12-24 International Engine Intellectual Property Company, Llc. Unit trigger actuation
US20180304877A1 (en) * 2015-10-21 2018-10-25 Cnh Industrial America Llc A hydraulic brake actuator
WO2021178781A1 (en) * 2020-03-06 2021-09-10 Howe & Howe Inc. Failsafe parking brake manual override

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2523535A1 (en) * 1982-03-19 1983-09-23 Valeo Actuator for vehicle parking brake - comprises piston which selectively connects pressure source or reservoir to slave cylinder

Family Cites Families (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB1216897A (en) * 1968-08-13 1970-12-23 Caterpillar Tractor Co Pressure modulated brake valve
US3504947A (en) * 1968-10-03 1970-04-07 Bendix Westinghouse Automotive Service and emergency brake control valve
GB1320752A (en) * 1970-04-01 1973-06-20 Dewandre Co Ltd C Control valves for spring brake units
GB1364510A (en) * 1971-11-19 1974-08-21 Dewandre Co Ltd C Control valve for motor vehicle breaking systems
DE2164591C3 (en) * 1971-12-24 1979-06-21 Alfred Teves Gmbh, 6000 Frankfurt Dual-circuit master cylinder for a pressure accumulator brake system, in particular for motor vehicles
DE2317312C2 (en) * 1973-04-06 1983-10-06 Wabco Westinghouse Fahrzeugbremsen GmbH, 3000 Hannover Pressure control valve, especially brake valve

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2003106819A1 (en) * 2002-06-17 2003-12-24 International Engine Intellectual Property Company, Llc. Unit trigger actuation
GB2403773A (en) * 2002-06-17 2005-01-12 Int Engine Intellectual Prop Unit trigger actuation
GB2403773B (en) * 2002-06-17 2005-11-16 Int Engine Intellectual Prop Unit trigger actuation
US20180304877A1 (en) * 2015-10-21 2018-10-25 Cnh Industrial America Llc A hydraulic brake actuator
WO2021178781A1 (en) * 2020-03-06 2021-09-10 Howe & Howe Inc. Failsafe parking brake manual override
US11840167B2 (en) 2020-03-06 2023-12-12 Howe & Howe Inc. Failsafe parking brake manual override

Also Published As

Publication number Publication date
SE437802B (en) 1985-03-18
ES242934Y (en) 1980-02-01
DE2818532C2 (en) 1988-06-23
IT1112883B (en) 1986-01-20
ES242934U (en) 1979-09-01
FR2424161A1 (en) 1979-11-23
FR2424161B1 (en) 1985-02-01
GB2019970B (en) 1982-03-24
SE7903579L (en) 1979-10-28
IT7922093A0 (en) 1979-04-24
DE2818532A1 (en) 1979-10-31

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Legal Events

Date Code Title Description
PCNP Patent ceased through non-payment of renewal fee