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:
Mar. 05, 2002
Filed:
Jun. 21, 2000
Naosumi Tada, Nabari, JP;
Borg-Warner Automotive K.K., Nabari, JP;
Abstract
The present invention relates to a mechanism to prevent the incorrect assembly of an air vent disc in a hydraulic tensioner. The hydraulic tensioner includes a housing having a chamber. A hollow plunger is slidably positioned inside the chamber. The chamber contains a spring which biases the plunger in a protruding direction and an air vent disc provided inside the plunger. An air vent disc includes a first portion and a second portion. The first portion has a groove as a vent channel and a through-hole. The second portion has a central hole and a plurality of grooves extending radially and opening into the outer periphery of the vent disc. The outer diameter of the second portion is larger than the inner diameter of the aperture located at the upper end of the plunger tip.