Patent ID: 8205710

Claim:
A belt-type continuously variable transmission comprising: a primary sheave; a secondary sheave; a resin block belt wound around the primary and secondary sheaves; and a transmission case that defines a belt chamber accommodating the primary sheave, the secondary sheave, and the resin block belt; wherein the transmission case comprises: an air passage connecting an inside and an outside of the belt chamber; and at least one sound absorbing member attached to an inner wall of the air passage such that a sound wave traveling from the inside toward the outside of the belt chamber collides with the at least one sound absorbing member; wherein the at least one sound absorbing member extends along the inner wall for less than an entire circumferential surface of the inner wall; the at least one sound absorbing member does not extend across a cross-section of the air passage to an opposite side of the inner wall; the air passage includes a bent or a curved portion; and the at least one sound absorbing member is disposed only on one side of the inner wall at the bent or curved portion where the sound wave collides with the at least one sound absorbing member.