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Fujimoto; Nobuyuki
Osaka, JP
No. of patents:

Patent Number Title Of Patent Date Issued
7513844 Tensioner with improved stopper April 7, 2009
In a tensioner for a timing chain, a spring-biased plunger for urging a shoe into sliding engagement with the chain is temporarily held in a retracted condition, prior to installation of the tensioner, by a stopper having a pin that extends through a hole in the tensioner housing and
6810907 Hydraulic tensioner with relief valve mechanism November 2, 2004
In a hydraulic tensioner having a relief valve mechanism in which a spring-biased valve element is reciprocable in a bore, hitting sounds produced by collision of the relief valve element with a plug in the bore, and wear and breakage of the biasing spring, are prevented by providing an
6592479 Tensioner with relief valve mechanism July 15, 2003
A plunger equipped with a relief valve mechanism is slidably mounted in a tensioner housing. The relief valve mechanism has a valve spring disposed between a valve and a spring retainer plug in a compressed condition. The spring retainer plug has a stopper surface formed on the side whic
6398682 Hydraulic tensioner with relief valve June 4, 2002
A hydraulic tensioner includes a relief valve provided at a projecting end portion of a plunger. The relief valve has a pressure path communicating with a high pressure oil chamber, a valve body fitted for sliding movement in the pressure path, a spring for normally biasing the valve tow
6383103 Hydraulic tensioner May 7, 2002
A hydraulic tensioner includes a relief valve mechanism assembled in a plunger and held in fluid communication with a high-pressure oil chamber defined between a housing and the plunger which is slidably inserted in a plunger accommodation bore in the housing with a tip portion projectin

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