The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Jun. 28, 2016
Filed:
Oct. 06, 2014
Nacco Materials Handling Group, Inc., Fairview, OR (US);
Michael Hoock, Lonato, IT;
HYSTER-YALE GROUP, INC., Fairview, OR (US);
Abstract
Reach truckwith a control systemfor controlling the lowering movement of a fork, the control systemcomprising a height sensor, for determining the lifting height h of the forkof the reach truck, a proportional electrical hydraulic valveconnected to a lifting cylinderof the reach truck, for controlling an oil flow of the lifting cylinder, and a control unit, connected to the height sensorfor receiving the actual lifting height h signal and controlling the proportional electrical hydraulic valve, wherein the control unitautomatically decreases the maximum lowering speed v of the fork, by controlling the proportional electrical hydraulic valve, according a predetermined maximum speed v curve depending on the lifting height h of the fork, and in some embodiments only on the lifting height h of the fork, such that the forkis softly stopped at the ground.