公开(公告)号：US06561142B2

公开(公告)日：2003-05-13

申请号：US10006622

申请日：2001-12-10

申请人： Katsuya Moteki ,  Shunichi Aoyama ,  Ryousuke Hiyoshi ,  Hiroya Fujimoto

发明人： Katsuya Moteki ,  Shunichi Aoyama ,  Ryousuke Hiyoshi ,  Hiroya Fujimoto

IPC分类号： F01B3014

CPC分类号： F02B41/04 ,  F01B9/02 ,  F02B75/048

摘要： A paired counterweights of a crankshaft have projected inner surfaces which protrude toward each other defining a given space therebetween. A plurality of links are arranged to convert a reciprocating motion of a piston to a rotational motion of the crankshaft. One of the links is pivotally connected to other links through link connecting portions and swingably disposed on a crank pin of the crankshaft so that upon rotation of the crankshaft, a peripheral portion of the link passes through the given space. At least one of the link connecting portions is placed within an imaginary circle which would be described by a radially innermost part of the projected inner surfaces of the paired counterweights when the paired counterweights turn about an axis of the crank pin.