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:
Oct. 23, 1990
Filed:
Oct. 05, 1989
Seiji Nokubo, Itami, JP;
Teruhisa Kohno, Itami, JP;
Koichi Hashida, Itami, JP;
Atsuo Matsumoto, Itami, JP;
Hideaki Higashimura, Itami, JP;
Sumitomo Electric Industries, Ltd., Osaka, JP;
Abstract
A flow control valve for antilock control includes a housing having inlet, outlet and discharge ports communicating with a master cylinder, a wheel brake and a reservoir circuit, respectively, and a spool mounted in the housing so as to be slidable between two positions. When the spool is in one of the two positions, a large-flow channel is formed between the inlet and outlet ports, whereas in the other position, a restricted-flow channel is formed therebetween. In an intermediate position, both of the channels are closed by edge portions formed on the spool. A throttled bypass channel is formed so as to branch off from the restricted-flow channel so as to be connected to the outlet port. Even if the spool should get stuck in any intermediate position between the above two positions, hydraulic oil can be fed from the inlet port to the outlet port through this throttled channel.