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:
Jan. 24, 1989
Filed:
Dec. 15, 1987
Applicant:
Inventors:
Assignee:
Nippon Air Brake Co., Ltd., Kobe, JP;
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
B60T / ; B60T / ; B60T / ;
U.S. Cl.
CPC ...
303 15 ; 303 20 ; 303-3 ;
Abstract
An electropneumatic master controller for an electromagnetic straight air brake system for railway vehicles has a brake valve, brake solenoid valve, a release solenoid valve, and an electrical interface circuit. The electrical interface circuit includes a first and a second sensor and a first and a second comparator which are responsive to the pressure of the control line and straight air line to open and close the brake and release solenoid valves for applying and releasing the brake cylinder.