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:
Sep. 19, 1978
Filed:
Jun. 13, 1977
Albin Maier, Edinboro, PA (US);
Snap-Tite, Inc., Union City, PA (US);
Abstract
A cable reel control valve and associated system for controlling the operation of a hydraulic motor unit coupled to a reel mounted on a vehicle, such as a mine car or the like and wherein the reel is adapted to automatically wind electrical cable thereon as the mine car moves toward the point where the cable is connected to the source of power, and to automatically pay-out the cable as the mine car moves away from the electrical cable connection to the source of power. The cable reel control valve includes a pump port, and a motor port to which the motor for rotating the reel is coupled, and includes a pilot pressure operated bypass valve means for automatically sensing the pressure differential across the pump and motor ports and to automatically bypass the pump flow to reservoir when the cable reel is paying out the cable, and when the cable reel stops, and automatically diverts the full pump flow to the reel motor when the cable is being reeled in in response to movement of the vehicle toward the electrical connection to the source of power.