CA2138379A1 - Spring chamber isolation system for a fluid-operated brake actuator - Google Patents

Spring chamber isolation system for a fluid-operated brake actuator

Info

Publication number
CA2138379A1
CA2138379A1 CA002138379A CA2138379A CA2138379A1 CA 2138379 A1 CA2138379 A1 CA 2138379A1 CA 002138379 A CA002138379 A CA 002138379A CA 2138379 A CA2138379 A CA 2138379A CA 2138379 A1 CA2138379 A1 CA 2138379A1
Authority
CA
Canada
Prior art keywords
spring
spring chamber
chamber
service
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
CA002138379A
Other languages
French (fr)
Other versions
CA2138379C (en
Inventor
William C. Pierce
John P. Bowyer
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.)
Haldex Brake Corp
Original Assignee
Individual
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
Priority claimed from US08/054,757 external-priority patent/US5372059A/en
Application filed by Individual filed Critical Individual
Publication of CA2138379A1 publication Critical patent/CA2138379A1/en
Application granted granted Critical
Publication of CA2138379C publication Critical patent/CA2138379C/en
Anticipated expiration legal-status Critical
Expired - Fee Related 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
    • B60T17/00—Component parts, details, or accessories of power brake systems not covered by groups B60T8/00, B60T13/00 or B60T15/00, or presenting other characteristic features
    • B60T17/08—Brake cylinders other than ultimate actuators
    • B60T17/083—Combination of service brake actuators with spring loaded brake actuators

Landscapes

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

Abstract

A spring chamber isolation system is provided to isolate the spring chamber of a spring brake actuator from its operating environment. The brake actuator (14) comprises a service brake housing (18) divided into first and second service chambers (26. 28) by a diaphragm or piston, and a spring brake housing (20) arranged in tandem with and attached to the service brake housing, also divided into a first and second spring chambers (62, 63) by a diaphragm (53) or piston. A hollow actuator rod (56) is attached to the diaphragm or piston in the spring brake housing and extends from the first spring chamber, through openings in the spring and service brake housings, into the first service brake chamber. The actuator rod is open at both ends, allowing air to flow from the first service chamber into the first spring chamber when the volume of the first spring chamber increases.
CA002138379A 1993-04-27 1994-03-14 Spring chamber isolation system for a fluid-operated brake actuator Expired - Fee Related CA2138379C (en)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
US054,757 1993-04-27
US08/054,757 US5372059A (en) 1993-04-27 1993-04-27 Fluid operated brake actuator with internal valve
PCT/US1994/002737 WO1994025736A1 (en) 1993-04-27 1994-03-14 Spring chamber isolation system for a fluid-operated brake actuator

Publications (2)

Publication Number Publication Date
CA2138379A1 true CA2138379A1 (en) 1994-11-10
CA2138379C CA2138379C (en) 2005-11-22

Family

ID=26733459

Family Applications (1)

Application Number Title Priority Date Filing Date
CA002138379A Expired - Fee Related CA2138379C (en) 1993-04-27 1994-03-14 Spring chamber isolation system for a fluid-operated brake actuator

Country Status (2)

Country Link
CA (1) CA2138379C (en)
WO (1) WO1995025030A1 (en)

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
MXPA01011681A (en) 2000-03-15 2002-06-04 Holland Neway Int Inc Sealed brake actuator.
WO2019090296A1 (en) * 2017-11-06 2019-05-09 Indian Head Industries, Inc. Brake actuator with internal breathing valve

Family Cites Families (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR1599539A (en) * 1968-02-29 1970-07-15
US3736842A (en) * 1972-02-22 1973-06-05 Bendix Corp Breathing and failure detection system for spring brakes
DE2936899C2 (en) * 1979-09-12 1983-01-27 Knorr-Bremse GmbH, 8000 München Bleeding device for a combined service brake and spring brake cylinder

Also Published As

Publication number Publication date
CA2138379C (en) 2005-11-22
WO1995025030A1 (en) 1995-09-21

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Legal Events

Date Code Title Description
EEER Examination request
MKLA Lapsed