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:
Jan. 05, 1993
Filed:
Jun. 06, 1991
Emerson L Kumm, Tempe, AZ (US);
Kumm Industries, Inc., Phoenix, AZ (US);
Abstract
A variable speed drive system for prime mover driven accessories which includes a self-energized controllable belt tensioner in combination with a variable diameter pulley assembly. The tensioner, upon command, uses a pump continuously driven by a fixed diameter pulley positioned by a rotary or linear actuator to take up and tension the belt passing over the same pulley. In the variable speed drive, this tensioner functions typically together with a variable diameter pulley which operates on the belt by forces which are directed toward increasing the variable pulley diameter. A hydraulic flow system with appropriate pump, valves, lines, and actuator can all be self-contained in the rotary tensioner. Selenoid valves are used in an on-off fashion with an actuator to move a pulley arm attached to the actuator generating the required belt tension to decrease the variable pulley diameter as desired upon command.