Endless belt power transmission systems or components – Friction drive pulley or guide roll – Including grooves or openings in cylindrical belt-engaging...
Reexamination Certificate
2007-07-11
2010-12-28
Siconolfi, Robert A (Department: 3657)
Endless belt power transmission systems or components
Friction drive pulley or guide roll
Including grooves or openings in cylindrical belt-engaging...
C474S008000
Reexamination Certificate
active
07857721
ABSTRACT:
Abrasion of a V-belt in a belt type continuously variable transmission accommodated in an engine unit of a motorcycle is suppressed. A V-belt wound around and contacting a primary sheave and a secondary sheave72is at least partially formed from a resin. A plurality of grooves aligned at a predetermined pitch in a radial direction are formed on sheave surfaces of the primary and secondary sheaves. The average pitch P(mm) of the grooves is P≦−0.08K×10−3+0.18, where K(Hv) indicates surface hardness of the sheave surfaces.
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Ishida Yousuke
Murayama Takuji
Oishi Akifumi
Keating & Bennett LLP
Momper Anna
Siconolfi Robert A
Yamaha Hatsudoki Kabushiki Kaisha
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