Machine element or mechanism – Rotary member or shaft indexing – e.g. – tool or work turret – Preselected indexed position
Patent
1991-07-19
1993-01-12
Wright, Dirk
Machine element or mechanism
Rotary member or shaft indexing, e.g., tool or work turret
Preselected indexed position
475132, F16H 5902
Patent
active
051780437
ABSTRACT:
A traction drive transmission includes a forward reverse change-over mechanism followed by a half-toroidal dual-cavity traction drive system. A control valve assembly includes a valve body. The valve body has on its periphery a mount site and formed with a first valve bore adjacent the mount site and a second valve bore. A rotary actuator in the form of a stepper motor is secured to the mount site. A forward shift control valve has a valve element and a rod slidably disposed in the first valve bore, while a reverse ratio valve has a valve element slidably disposed in the second valve bore. The rod is provided with a rack and the stepper motor has a pinion meshing the rack. A first lever associated with a first precess cam is mounted on the valve body to cooperate with the valve element of the forward shift control valve. A second lever associated with a second precess cam is mounted on the valve body to cooperate with the valve element of the reverse ratio valve.
REFERENCES:
patent: 4519273 (1985-05-01), Shimizu et al.
patent: 4533340 (1985-08-01), Abo et al.
patent: 4616530 (1986-10-01), Tanaka et al.
patent: 4735113 (1988-04-01), Yamamuro et al.
patent: 4736655 (1988-04-01), Kumura et al.
patent: 4916982 (1990-04-01), Suzuki
patent: 4939958 (1990-07-01), Hayasaki
Nissan Motor Co,. Ltd.
Wright Dirk
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