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:
Aug. 20, 2002
Filed:
Nov. 16, 2000
Yoshio Asano, Kobe, JP;
Nabco, LTD, Kobe, JP;
Abstract
A brake cylinder apparatus in which both the service brake and the spring brake, used for such things as a parking brake, can operate, and at the same time can shorten the length of the axial direction. A clutch is provided that couples the second piston with the rod when the pressurized fluid has stopped acting on the second action chamber of the spring brake and the second piston has started to move towards the rod. This clutch means comprises a screw provided on the outer circumference of the rod, a nut element supported on the second piston through the medium of a bearing such that it can rotate freely, and that meshes with the screw, and a stopping means that stops the rotation of the nut element when the second piston starts to move towards the rod.