초록 ▼

The present invention is directed to an improved motion control system for a motorized hand/rider lift truck having a load bearing fork, electric traction motor, storage battery, steerable wheel, steering control mechanism, and a brake that includes a deadman brake mechanism. An electrical power cir

The present invention is directed to an improved motion control system for a motorized hand/rider lift truck having a load bearing fork, electric traction motor, storage battery, steerable wheel, steering control mechanism, and a brake that includes a deadman brake mechanism. An electrical power circuit comprises a high speed control circuit and a low speed control circuit that control, respectively, a high speed travel mode and a low speed travel mode of the truck. The improved motion control system of the invention further comprises means for selecting the high or low speed travel mode and means for actuating an automatic coast control device that automatically overrides the deadman brake mechanism while the truck is in the low speed travel mode and deactivates the coast control device when the truck is in the high speed travel mode. The present invention is further directed to a coast control device for a hand/rider truck having a brake that includes a deadman brake mechanism, an electrical power circuit that includes high and low speed control circuits, and a steering mechanism that includes a steering arm movable to a position that causes engagement of the brake. The high and low speed circuits control, respectively, high speed and low speed travel modes of the truck.

대표청구항 ▼

[ I claim:] [1.] In a motorized hand/rider lift truck comprising a load-bearing fork, an electric traction motor, a storage battery, a steerable wheel, a steering control mechanism, and a brake comprising a deadman brake mechanism, an improved motion control system comprising:an electrical power cir

[ I claim:] [1.] In a motorized hand/rider lift truck comprising a load-bearing fork, an electric traction motor, a storage battery, a steerable wheel, a steering control mechanism, and a brake comprising a deadman brake mechanism, an improved motion control system comprising:an electrical power circuit comprising a high speed control circuit and a low speed control circuit, said control circuits controlling, respectively, a high speed travel mode wherein the truck is operable within a first range of speeds and a low speed travel mode wherein the truck is operable within a second range of speeds, the second range being a lower range than the first range;a first selector for selecting the high speed travel mode;a second selector for selecting the low speed travel mode and for, after the low speed travel mode has been selected, controlling the traction motor to drive the truck at a speed within the second range until the high speed travel mode isselected;an automatic coast control device for automatically overriding the deadman brake mechanism when actuated, the coast control device actuated when said low speed travel mode is selected and deactuated when said high speed travel mode is selected.