A chain tensioner includes a housing having a closed bottom. A rod is axially movably inserted in the housing for pressing a chain. A wear ring is mounted to the outer periphery of the rod and is biased by a return spring mounted in the housing in a direction away from the bottom of the housing. A nut member is mounted between the wear ring and the bottom of the housing so as to be coaxial with the housing and axially movable relative to the housing. A ring-shaped spring member is provided between the nut member and the bottom of the housing to support the nut member. A screw rod is provided between the rod and the bottom of the housing and in threaded engagement with the nut member. A spring is provided between the screw rod and the bottom of the housing to bias the screw rod in a direction away from the bottom of the housing. The screw rod has an end surface that is in abutment with the rod.
申请公布号
US2008132366(A1)
申请公布日期
2008.06.05
申请号
US20070987479
申请日期
2007.11.30
申请人
SATO SEIJI;KITANO SATOSHI;RYOUNO YOSHIAKI;ONIMARU KOUICHI
发明人
SATO SEIJI;KITANO SATOSHI;RYOUNO YOSHIAKI;ONIMARU KOUICHI