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. 15, 2005
Filed:
Dec. 30, 2002
Toyonaga Saitoh, Osaka, JP;
Tatsuya Konishi, Osaka, JP;
Junya Kurohata, Osaka, JP;
Shigekazu Fukuda, Osaka, JP;
Hiroshi Hashimoto, Osaka, JP;
Toyonaga Saitoh, Osaka, JP;
Tatsuya Konishi, Osaka, JP;
Junya Kurohata, Osaka, JP;
Shigekazu Fukuda, Osaka, JP;
Hiroshi Hashimoto, Osaka, JP;
Tsubakimoto Chain Co., Osaka, JP;
Abstract
In a ratchet-type hydraulic tensioner for a chain transmission, having a plunger and a housing forming a high pressure oil chamber, an excess supply oil discharge passage is provided. The discharge passage communicates with an oil supply passage leading from an oil supply opening, which receives oil under pressure from a oil pump, to a hydraulic check valve mechanism in the housing, which delivers oil to the high pressure oil chamber. Excess oil is discharged to the exterior of the tensioner housing and directed toward the chain. Excessive chain tension is avoided, and smooth and reliable chain travel, and suppression of whistling sounds, are achieved.