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:
Apr. 11, 2017
Filed:
Sep. 11, 2014
Westinghouse Air Brake Technologies Corporation, Wilmerding, PA (US);
Glyn A. Finch, Jr., Simpsonville, SC (US);
Maria Koon, Greenville, SC (US);
Peter D. Mathern, Greenville, SC (US);
Westinghouse Air Brake Technologies Corporation, Wilmerding, PA (US);
Abstract
A piston stroke sensor arrangement for a brake unit includes a brake unit including a piston and a piston tube, and a proximity sensor supported on the brake unit. The proximity sensor may determine the location of the piston within the brake unit based on the position of the piston tube relative to the proximity sensor. The proximity sensor may be an inductive proximity sensor. A groove may be defined in an outer circumferential surface of the piston tube. When the brake unit is in a non-applied position, the proximity sensor may detect metal of the piston tube. When the brake unit is in an applied position, the proximity sensor may not detect the metal of the piston tube.