Patent ID: 8425355

Claim:
A belt-type continuously variable transmission, comprising: a primary sheave made of metal and including a pair of first clamp surfaces opposed to each other and a first belt groove located between the first clamp surfaces, the primary sheave being arranged to adjust a width of the first belt groove; a secondary sheave made of metal and including a pair of second clamp surfaces opposed to each other and a second belt groove located between the second clamp surfaces, the secondary sheave being arranged to adjust a width of the second belt groove; and a belt endlessly wound between the first belt groove of the primary sheave and the second belt groove of the secondary sheave, the belt including a plurality of resin blocks including contact surfaces clamped between the first clamp surfaces and between the second clamp surfaces such that a torque of the primary sheave is transmitted to the secondary sheave via the belt, the contact surfaces of the belt including a plurality of uneven recesses therein; wherein friction layers including friction enhancing infusible powder are disposed on at least the contact surfaces of the belt such that the powder fills the plurality of uneven recesses; and the powder has characteristics such that, when the belt is clamped between the first clamp surfaces and between the second clamp surfaces, the powder is not fused by heat that is generated by friction between the contact surfaces of the belt and the first and second clamp surfaces, and the powder has a hardness lower than a hardness of the first and second clamp surfaces.