Patent ID: 7241238

Claim:
A variable drive transmission comprising: a drive shaft having a fixed pulley wall section fixedly mounted thereon, an axially displaceable pulley wall section mounted thereon, cooperable with said fixed pulley wall section to provide a drive wheel, an inlet port communicable with a source of fluid under pressure and a fluid outlet port; a driven wheel; a continuous link operatively connecting said drive and driven wheels for transmitting torque therebetween; a first partition fixedly mounted on said shaft and cooperating with said axially displaceable wall section and said shaft to provide a first variable volume fluid chamber, having a fluid passageway communicating with said first fluid chamber; a second partition mounted on said shaft for axial displacement relative thereto, cooperating with said first partition and said shaft to provide a second variable volume chamber communicating with said first variable volume chamber through said passageway in said first partition, and having a portion thereof non-obstructing said outlet port of said shaft when in a first axially disposed position and obstructing said outlet port of said shaft when in a second axially disposed position, and at least one bearing surface lying in a plane including a radius of said shaft and angularly displaced relative to a plane including the axis of said shaft; a gear axially mounted on said shaft, angularly displaceable relative to said shaft; and at least one lever mounted on said gear, having a roller disposed thereon, cooperable with said bearing surface, whereupon angular displacement of said gear, said lever shall cause said roller to engage said bearing surface to further cause said portion of said second partition to displace between said first and second positions.