Patent ID: 8460146

Claim:
A roller type transmission device comprising: a housing provided to rotatably accommodate a shaft which has an eccentric shaft portion; a stationary ring having a predetermined width, and provided within said housing in concentric relationship with said shaft; a rotational body fixedly placed within said housing in concentric relationship with said shaft, and having an open-ended portion which fixedly places a controllable ring as a rotational ring in concentric relationship with said stationary ring; an array of transmission pin rollers having a predetermined number of pin rollers which are press fit into said stationary ring along a certain circle line to be in line contact with an inner side surface of said stationary ring with the abutting pin rollers pressure exerted circularly in line contact with each other; an array of controllable pin rollers having a predetermined number of pin rollers which are press fit into said rotational ring along a certain circle line to be in line contact with an inner side surface of said rotational ring with the abutting pin rollers pressure exerted circularly in line contact with each other; a transmission ring body rotatably secured to said eccentric shaft portion within said stationary ring and said rotational ring so as to eccentrically rotate with rotational and revolving movement accompanied in combination with a rotational movement of said shaft; a transmission ring gear provided to have outer teeth circumferentially formed continuously at one peripheral side of said transmission ring body with said outer teeth profiled along a trochoidal curve, some of said outer teeth always engaging with a plurality of said pin rollers of said transmission pin rollers; a controllable ring gear provided to have outer teeth circumferentially formed continuously at the other peripheral side of said transmission ring body with said outer teeth profiled along a circular of arc, some of said outer teeth always engaging with a plurality of said pin rollers of said controllable pin rollers; and an arced diameter of said outer teeth of said controllable ring gear being equal to an outer diameter of said pin rollers of said array of controllable pin rollers plus a two-fold quantity of an eccentricity of said eccentric shaft portion, and making an integral difference in number between number of the pin rollers of said array of transmission pin rollers and number of said teeth of said transmission ring gear.