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:
Aug. 22, 1989
Filed:
May. 04, 1987
Michael A Cordner, Manchester, MO (US);
Sundstrand Corporation, Rockford, IL (US);
Abstract
A multi-range, dissipative, infinitely variable ratio transmission has a planetary gearset with at least four distinct gear components including an input gear, an output gear and a pair of independently rotatable gears; a first hydroviscous brake connected to one of the rotatable gears; a second hydroviscous brake connected to the other of said rotatable gears; and a circuit including brake operating units for selecting which of said brakes is operable and for controlling the amount of slip of the operable brake in order to cover all combinations of input and output speed within their respective ranges with minimal slip of a hydroviscous brake to maximize efficiency of the transmission.