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:
Feb. 11, 2014
Filed:
Feb. 28, 2011
Derek Scott Hall, Dubuque, IA (US);
Joshua Dean Graeve, Peosta, IA (US);
Brian K. Kellogg, Bellevue, IA (US);
Eric Richard Anderson, Ames, IA (US);
Jeffrey William Dobchuk, Saskatoon, CA;
Derek Scott Hall, Dubuque, IA (US);
Joshua Dean Graeve, Peosta, IA (US);
Brian K. Kellogg, Bellevue, IA (US);
Eric Richard Anderson, Ames, IA (US);
Jeffrey William Dobchuk, Saskatoon, CA;
Deere & Company, Moline, IL (US);
Abstract
A fail-safe system and method for an electro-hydraulic system. The system includes a controller, sensor, directional control valve, interlock, hydraulic valve and movement actuator. The directional control valve moves when the controller is moved. The interlock is hydraulically coupled to the directional control valve; and is in active position when the directional control valve is moved, and in shutoff position when the directional control valve is not moved. The hydraulic valve has an input side coupled to a flow source and an output side coupled to a hydraulic function. The movement actuator moves the hydraulic valve to a desired position as directed by the controller when the interlock is in the active position, and does not move the hydraulic valve when the interlock is in the shutoff position. The sensor detects movement of the controller and sends a control signal to the first valve actuator.