GB796342A - Improvements relating to vacuum brake cylinders - Google Patents

Improvements relating to vacuum brake cylinders

Info

Publication number
GB796342A
GB796342A GB1493855A GB1493855A GB796342A GB 796342 A GB796342 A GB 796342A GB 1493855 A GB1493855 A GB 1493855A GB 1493855 A GB1493855 A GB 1493855A GB 796342 A GB796342 A GB 796342A
Authority
GB
United Kingdom
Prior art keywords
piston
rod
aperture
brake
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
GB1493855A
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.)
Siemens Mobility Ltd
Original Assignee
Westinghouse Brake and Signal Co 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 Westinghouse Brake and Signal Co Ltd filed Critical Westinghouse Brake and Signal Co Ltd
Priority to GB1493855A priority Critical patent/GB796342A/en
Publication of GB796342A publication Critical patent/GB796342A/en
Expired legal-status Critical Current

Links

Classifications

    • BPERFORMING OPERATIONS; TRANSPORTING
    • B60VEHICLES IN GENERAL
    • B60TVEHICLE 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
    • B60T17/00Component parts, details, or accessories of power brake systems not covered by groups B60T8/00, B60T13/00 or B60T15/00, or presenting other characteristic features
    • B60T17/08Brake cylinders other than ultimate actuators

Abstract

796,342. Brake cylinders. WESTINGHOUSE BRAKE & SIGNAL CO., Ltd., and SIMMONS, A. W. May 9, 1956 [May 24, 1955], No. 14938/55. Class 103 (1). In order to prevent the diaphragm of a vacuum brake cylinder from being distorted sideways during its upward movement in the brake - applying direction, causing wear in the guide bush when atmospheric air is admitted into the vacuum brake pipe, thus raising the pressure in the lower chamber communicating therewith which acts on the underside of the diaphragm and causes the piston member to rise, the vacuum brake cylinder is provided with a piston-rod passing freely, without lateral restraint, through an aperture in the lower portion of the cylinder; the leakage of air through the aperture being prevented by a flexible sleeve or gaiter clamped at its ends around the aperture and piston-rod respectively. In the embodiment shown in Fig. 1, the increased pressure of air in lower chamber 24 during a brake application acts uniformly around the diaphragm 6 and keeps the piston member 11 substantially central within the cylinder and permits, at the same time, limited lateral movement of the piston-rod 18 in aperture 22 in bush 14 to allow for any uneven flexing of the diaphragm 6 as it rolls up and down in the inner surface of the cylinder guide 2. Flexible sleeve or gaiter 17 seals the aperture 22 of the bush 14 without restricting movement of the piston-rod 18. Fig. 2 illustrates alternative means for limiting the lateral movement of piston 11 during release of the brakes; wherein the piston-rod 18a is hollow and is open at its upper end into which extends a guide-rod 27 depending axially from the cylindrical cover 1 to which it is rigidly secured. Specification 760,544 is referred to.
GB1493855A 1955-05-24 1955-05-24 Improvements relating to vacuum brake cylinders Expired GB796342A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
GB1493855A GB796342A (en) 1955-05-24 1955-05-24 Improvements relating to vacuum brake cylinders

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB1493855A GB796342A (en) 1955-05-24 1955-05-24 Improvements relating to vacuum brake cylinders

Publications (1)

Publication Number Publication Date
GB796342A true GB796342A (en) 1958-06-11

Family

ID=10050187

Family Applications (1)

Application Number Title Priority Date Filing Date
GB1493855A Expired GB796342A (en) 1955-05-24 1955-05-24 Improvements relating to vacuum brake cylinders

Country Status (1)

Country Link
GB (1) GB796342A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2258498A (en) * 1991-08-05 1993-02-10 Nat Oilwell An actuator

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2258498A (en) * 1991-08-05 1993-02-10 Nat Oilwell An actuator

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