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. 02, 1979
Filed:
Mar. 21, 1977
Jerry L Zabonick, Coldwater, MI (US);
Evans Products Company, Portland, OR (US);
Abstract
A fluid actuatable fan clutch having an energy absorbing internal caliper action, including a pulley or sheave rotatably mounted on a fixed shaft; an annular friction facing connected to an internal surface of the sheave; a fan blade hub rotatably mounted on the shaft adjacent the sheave, the hub having an annular piston cavity or cylinder having a piston located therein facing the friction facing, the piston being normally urged out of contact with the friction facing by a suitable spring member; an annular thrust cap located on the side of said friction facing opposite the piston, the thrust cap being connected to the fan hub and being normally out of contact with the friction facing; and suitable passageways for supplying air or other fluid to the back side of said piston for urging the piston into contact with said friction facing and against said thrust cap to thereby engage the fan hub with the sheave. The fan clutch also has a removable fan hub cap for permitting access to the airseal located at the outer end of the shaft to thereby permit easy replacement thereof. The fan clutch is further provided with a safety retaining ring located on the shaft to prevent the fan hub and connected parts from being thrust outwardly off the shaft in the event of a clutch failure.