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:
Dec. 28, 2010
Filed:
Jan. 12, 2007
Michael J. Spadaccini, Dexter, NY (US);
Deepak Kumar, Kingston, CA;
Michael J. Spadaccini, Dexter, NY (US);
Deepak Kumar, Kingston, CA;
New York Air Brake Corporation, Watertown, NY (US);
Abstract
The present empty/load device includes an inlet to receive a brake signal, an outlet for a brake device, load sensing element, a change over valve responsive to the load sensing element to proportion the pressure at the inlet and the outlet when empty is sensed by the load sensing element, a differential pressure element connecting the load sensing element and the change over valve, and a lock-out mechanism to prevent proportioning of the inlet pressure to the outlet when activated. The lock-out mechanism includes a lock-out valve, in a lock-out position, pneumatically preventing proportioning of the inlet pressure to the outlet. A first spring biases the lock-out valve from the lock-out position. A detent engages the lock-out valve and holding the lock-out valve in the lock-out position. The lock-out valve may be connected in parallel to the change over valve with respect to the inlet and the outlet. Alternatively, the lock-out valve may be connected in parallel to the both sides of the differential pressure element.