The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Mar. 09, 2004
Filed:
Apr. 18, 2002
Yoshio Asano, Kobe, JP;
Westinghouse Air Brake Technologies Corporation, Wilmerding, PA (US);
Abstract
To provide a brake cylinder unit wherein both the normal brake and the spring brake that is used as a parking brake, etc., can act, and in addition wherein it is possible to shorten the axial direction length. In a brake cylinder unit ( ) wherein both the normal-service brake means ( ) and the spring brake means ( ) can act, there is provided a clutch means ( ) that links the rod ( ) and the second piston ( ) when the pressure fluid ceases to act on the second action chamber ( ) of the spring brake means ( ), and the first piston ( ) starts to move towards to the rod ( ). This clutch means ( ) comprises a screw ( ) that is provided on the rod ( ), a nut member ( ) that is provided on the second piston ( ) such that it can rotate, and a stop means ( ) that stops the rotation of the nut member ( ) when the second piston ( ) starts to move towards the rod ( ).