Clark Equipment Compnay

Dean E Davis

Willard L Chichester

Charles A Barnes

Carl L Wykoff

An auxiliary release apparatus for use with a hydraulic pressure releasable brake having a principal source of hydraulic pressure which comprises an auxiliary source of hydraulic pressure selectively connectible to the brake for releasing the brake when the principal source of hydraulic pressure is not operating. The auxiliary release apparatus includes a manual pump device for interrupting communication between the normal pressure source and the pressure releasable brake when the pressure source, as a pump, is not operating, and for manually pumping through a by-pass circuit pressure fluid to the pressure releasable brake.

Auxiliary release device for a hydraulic pressure releasable brake

A brake and transmission control system for a vehicle having a hydraulically controlled power shift transmission and a spring applied hydraulically released parking brake. Both the transmission control and the brake are interconnected hydraulically with the operator's seat whereby when the operator leaves the seat the transmission is automatically shifted to neutral and the parking brake is automatically applied.

Brake and transmission control

A lift truck having a particular type of upright, namely, a triple stage upright having a fixed upright section, two telescopic sections, and a load carrier mounted on the inner telescopic section. A primary lift cylinder and chain assembly is mounted from and elevatable with the inner upright section and is connected with the load carrier to elevate it with the inner section, and a secondary lift cylinder is supported from the truck and connected to elevate the telescopic sections with the primary cylinder and load carrier. A fluid conduit is provided between the primary lift cylinder and secondary lift cylinder, a first portion of the fluid conduit having a first valve interposed therein is operatively associated with the primary lift cylinder and is selectively engageable with a second valve interposed in a second portion of the fluid conduit and operatively connected with the secondary lift cylinder. When the primary lift cylinder is retracted relative to the secondary lift cylinder, the coupling comprised by the first and second valves is in its fluid engagement position, but is not in its fluid engagement position when the primary lift cylinder is extended. The coupling has self-centering alignment capability. Fluid retained in the second valve is protected from contamination by an overlying cover plate when the primary lift cylinder is extended.

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Battle Creek, MI, United States of America

Dean E Davis