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. 19, 2011
Filed:
Jun. 12, 2008
Applicant:
Peter David Mathern, Greenville, SC (US);
Inventor:
Peter David Mathern, Greenville, SC (US);
Assignee:
Wabtec Holding Corp., Wilmerding, PA (US);
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
F16D 65/24 (2006.01);
U.S. Cl.
CPC ...
Abstract
A spring-applied parking brake with manual release and reapply. A gear box fixed relative to the rear wall of a cylinder has a manual crank. A pushrod extending through the cylinder and gear box is connected to provide braking force. A threaded collet surrounding helical threads on the pushrod has flexible radially expandable tines. When the gear box is manually cranked, the pushrod is rotated and due to interaction of the threads on the inside of the collet and on the pushrod, the pushrod is moved axially releasing or reapplying the brake.