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:
Sep. 08, 1992
Filed:
Sep. 24, 1991
Applicant:
Inventor:
Hideo Tamamori, Kobe, JP;
Assignee:
Nippon Air Brake Co., Ltd., Kobe, JP;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
F16K / ;
U.S. Cl.
CPC ...
1376275 ; 303 225 ; 303 228 ;
Abstract
A variable load valve device for a railway car having an arrangement for changing the axial position of a variable area piston in order to adjust the output pressure of piston valve assembly in accordance with different load weights of the railway car. The axial position of a supply valve seat is set in accordance with a load weight signal to in turn set the axial position at which the piston assembly, including the variable area piston, assumes a lap condition.