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:
Aug. 30, 2016
Filed:
Jul. 05, 2013
Komatsu Ltd., Tokyo, JP;
Komatsu Ltd., Tokyo, JP;
Abstract
A valve device switching between an open position and a close position, the open position allowing passage of oil through a gap between two ports in a spool bore from a small-diameter portion of a spool via a notch formed in a large-diameter portion of the spool, the close position blocking passage of oil through the gap between the two ports by the large-diameter portion, wherein the notch of the large-diameter portion has an inner bottom face at a portion located on a center side of the spool and is open to an outer peripheral space of the small-diameter portion and an outer peripheral surface of the large-diameter portion, and is formed such that an opening width of an opening at the outer peripheral surface is larger than a width of the inner bottom face.