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. 21, 2009
Filed:
Mar. 28, 2006
Applicants:
David E. Schweikert, Duncan, SC (US);
Robert N. Scharpf, Greer, SC (US);
James A. Wood, Spartanburg, SC (US);
Inventors:
David E. Schweikert, Duncan, SC (US);
Robert N. Scharpf, Greer, SC (US);
James A. Wood, Spartanburg, SC (US);
Assignee:
Wabtec Holding Corporation, Wilmerding, PA (US);
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
B60T 8/34 (2006.01);
U.S. Cl.
CPC ...
Abstract
A pneumatic emergency brake release timer comprises a high capacity transfer valve, a timing reservoir in communication with the pilot port of the high capacity transfer valve, the check valve and choke circuit providing parallel connections between the main source of pressure and the reservoir through a check valve and opposite flow through a dissipating choke.