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:
Jul. 22, 2014
Filed:
Jun. 01, 2011
Ryuji Sakai, Kakogawa, JP;
Hisao Wada, Kobe, JP;
Tatsuya Imai, Akashi, JP;
Kawasaki Jukogyo Kabushiki Kaisha, Kobe-shi, JP;
Abstract
A filler plug is configured such that: a head portion is formed on an upper end of an external thread; a sealing portion formed at the head portion strongly contacts a funnel-shaped inclined inner peripheral surface formed at one end of an internal thread of a hydraulic device oil passage by tightening the external thread with respect to the internal thread; an upper peripheral surface of the sealing portion is tapered; a circular constricted portion is formed between the sealing portion and the upper end of the external thread; and a dimensionless value of a head portion height Hfrom an upper surface of the head portion to the sealing portion, that is, a dimensionless value obtained by dividing the head portion height Hby a nominal designation value of the external thread portion, ranges from 0.4 to 0.7.