Crown Equipment Corporation

David J Obringer

Eric L Jensen

Nicholas J Sherman

Karl L Dammeyer

Cole Steinbrunner

Nicholas D Thobe

Darrin R Ihle

Marc A McClain

Cole T Steinbrunner

A method for operating a materials handling vehicle includes activating the materials handling vehicle and performing a warm up cycle. During the warm up cycle, energy is provided to at least one valve within the materials handling vehicle so as to energize the valve without providing a working fluid to the valve. Providing energy to the at least one valve effects a heating of oil located within the at least one valve.

Warm up cycle for a materials handling vehicle

A vehicle is provided comprising: a main body; a plurality of wheels coupled to the main body; a traction motor associated with the main body and coupled to at least one of the wheels for driving the one wheel; control apparatus coupled to the traction motor and generating a motor drive signal to the traction motor; and a first sensor for generating a speed signal indicative of a speed of the driven wheel. The control apparatus may calculate acceleration of the one wheel using changes in the speed signal over time and calculate an acceleration of the vehicle using torque applied by the traction motor and a mass of the vehicle.

Slip control for a materials handling vehicle

Growing community of inventors

Minster, OH, United States of America

David J Obringer