Patent ID: 7252073
Filing Date: 2007-08-07
Classification: F02B,F02D

Abstract:
1. An engine timer comprising a predetermined rotary shaft ( 22 ) to which a driving wheel ( 1 ) is attached, the driving wheel ( 1 ) having one lateral portion at which a driven wheel ( 2 ) is arranged and having the other lateral portion at which a pair of centrifugal weights ( 3 , 3 ) are arranged, respectively, each of the paired centrifugal weights ( 3 , 3 ) being urged in a centripetal direction by a weight-return spring ( 5 ) composed of a compression coil spring, there being provided between the driving wheel ( 1 ) and the driven wheel ( 2 ) an eccentric cam mechanism ( 4 ) which is interlockingly connected to the pair of centrifugal weights ( 3 , 3 ), wherein a force of unbalance between a centrifugal force of each of the paired centrifugal weights ( each of the paired centrifugal weights ( a shape memory spring (