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:
Dec. 07, 1993
Filed:
May. 15, 1992
Alan W Koharcheck, Temple City, CA (US);
Robert L Simons, San Dimas, CA (US);
Lucas Western, Inc., Brea, CA (US);
Abstract
A variable power conveyance apparatus for propelling loads under environments where the angle of inclination of a conveyance path may change. For these apparatuses, in particular, those located in aircraft cargo bays, drive units are constructed to drive heavy loads under all conditions, including up a slope. These drive units may be organized into sets for loading pallets into and out of the aircraft and along the left and right storage tracks within fore and aft sections of the aircraft. An inclinometer senses the aircraft's angle of inclination and generates a representative electronic signal. Control logic determines whether to apply, via an SCR circuit, a minimum voltage or a greater variable voltage if the selected set of drive units is called upon to drive the pallets up a slope. Three-phase voltage supplied to the selected set of drive units is thereby altered to provide only that voltage necessary to convey loads, and thus facilitates stalling of drive units supporting loads that have reached an end stop. This eliminates unnecessary roller wear and cargo deck maintenance.