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:
Feb. 02, 2021
Filed:
Mar. 02, 2017
Westinghouse Air Brake Technologies Corporation, Wilmerding, PA (US);
Edward W. Gaughan, Greensburg, PA (US);
William John Potter, Trafford, PA (US);
Westinghouse Air Brake Technologies Corporation, Wilmerding, PA (US);
Abstract
A parking brake control module using pneumatic logic to control a parking brake on a vehicle. The control module includes a brake pipe passageway, a reservoir passageway, a reservoir release valve; and an actuation cylinder vent valve. The control module applies or releases the parking brake based on pressures of the brake pipe and reservoir. A method uses pneumatic logic to control a parking brake on a vehicle. The parking brake is applied when the brake pipe pressure falls below a lower brake pipe pressure threshold and is released when the brake pipe pressure exceeds an upper brake pipe pressure threshold and the reservoir pressure exceeds a reservoir pressure threshold. A hold valve can allow an operator to manually prevent the release of the parking brake.