Hoist control valve interlock system for trolley-assisted dump t

Details Hoist control valve interlock system for trolley-assisted dump t Hoist control valve interlock system for trolley-assisted dump t

1983-05-26

1985-04-02

Paperner, Leslie J.

Land vehicles: dumping

Tilting

Operating mechanism

105239, 105261R, 180 21, 180272, B60P 116

Patent

active

045083886

ABSTRACT:
A hoist control valve interlock system for trolley-assisted dump trucks prevent a dump vessel from an unexpected upward movement caused by the operator's mismanipulation during running on an ascent course under the trolley mode condition. The interlock system has a pair of air cylinders for controlling a hoist control valve operatively connected to hoist cylinders for the dump vessel and directional control air valves for supplying and discharging compressed air from an air reservoir via a trolley mode interlock valve into and from the air cylinders by the operation of a hoist control lever. When the trolley mode interlock valve is shifted to its engine mode position to its trolley mode position, the hoist control valve is interlocked into its floating position by the action of one of the air cylinders where compressed air is supplied from the air reservoir via the trolley mode interlock valve and a shuttle valve irrespective of the air valves.

REFERENCES:
patent: 2600320 (1952-06-01), Potter
patent: 3695710 (1972-10-01), Cresci et al.

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