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. 16, 1980
Filed:
Mar. 19, 1979
Minoru Nagase, Kobe, JP;
The Nippon Air Brake Co., Ltd, Kobe, JP;
Abstract
A brake control system for a railway transit-type train having a control car, on which an electrical brake command is provided, and one or more controlled cars. The electric brake command is converted to a fluid pressure control signal that is connected to a load-adaptive relay valve device on the control car, as well as on each controlled car. Each load-adaptive relay valve is adjusted according to the load condition of a respective car so that the brake pressure of each car is developed consistent with its particular load and in accordance with the brake command in effect. In one embodiment of the invention, the electric brake command is a digital binary code formed by a three-wire control line and converted on the control car to a fluid pressure brake command signal by conventional electro-pneumatic valves and a multi-diaphragm relay valve device. One alternate embodiment contemplates an electric digital/analog converter in series with an electric/pressure transducer, while another alternative embodiment deals with converting an analog electric brake command signal to a fluid pressure brake command using an electric/pressure transducer.