RINK CONTRIVANCE DEVICE FOR REGULATING CONTROL

摘要

A hydrostatic transmission has a pair of variable displacement overcenter hydraulic pumps and first and second rotary servo valves. Each servo valve has a housing connected to the respective pump and a valve spool rotatably positioned within the housing for controlling the output displacement of the respective pump. A mounting plate extends between and is releasably connected to the housings of the first and second servo valves. A first device is connected to the valve spool of the first servo valve for selectively rotating said first servo valve spool, said first device being mounted on said mounting plate adjacent said first servo valve spool. A second device is connected to the valve spool of the second servo valve for selectively rotating the second servo valve spool, said second device being mounted on said mounting plate adjacent said second servo valve spool. A third device interconnects the first and second devices for causing simultaneous rotation of said valve spools in response to a single input signal to one of the first and second devices.