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:
Feb. 18, 2003
Filed:
Jun. 07, 2001
Applicant:
Inventors:
Keigo Kato, Aichi-ken, JP;
Masataka Mizuno, Aichi-ken, JP;
Assignee:
Aoyama Seisakusho Co., Ltd., Nagoya, JP;
Primary Examiner:
Int. Cl.
CPC ...
F16K 1/107 ;
U.S. Cl.
CPC ...
F16K 1/107 ;
Abstract
A spool valve is provided which has a plurality of small-diameter portions formed at predetermined spacings on a peripheral surface of a shaft, and pairs of annular ridges on peripheral surfaces of the small-diameter portions to have a larger diameter than an inner diameter of collars. The collars are closely fitted between the annular ridges to make valve bodies, and the collars include an inner wall, an outer wall and at least one connection therebetween, and an annular gap is provided between the inner wall and the outer wall.