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:
Apr. 12, 2005
Filed:
Dec. 16, 2002
Shin Seungpyo, Nabari, JP;
Shin Seungpyo, Nabari, JP;
BorgWarner Morse TEC Japan K.K., Nabari, JP;
Abstract
A hydraulic tensioner that applies tension to a chain is comprised of a hollow plunger slidably received in a bore of the housing having an inner space defining a fluid chamber with the bore and a rack member provided slidably in an axial direction in a groove on the outer circumference of the plunger. The hydraulic tensioner further comprises a spring biasing the plunger in a protruding direction, a ratchet member provided slidably in a ratchet hole extending in an inclined direction intersecting an axis of the plunger having cylindrical head portion with an outer circumferential edge portion adapted to engage rack teeth of the rack member, permitting travel of the plunger in a protruding direction but preventing retraction of the plunger in a backward direction, and a coil spring that biases the ratchet member in an engaging direction of the rack teeth.