Patent ID: 8485141
Filing Date: 2013-07-16
Classification: F01P,F16D

Abstract:
1. A hydraulically controlled fan drive system comprising: a housing assembly containing a hydraulic fluid; a pulley connected to said housing assembly for turning said housing assembly; a fan shaft rotatably connected to said housing by a hydraulically actuated clutch; a piston slidably mounted with a piston housing for actuating said clutch; a pressure tube for delivering kinetically pressurized hydraulic fluid pressure within said housing assembly to said piston housing; a controllable valve for controlling the fluid pressure within said piston housing; a bracket shaft rotationally supporting said housing and said pulley, said bracket shaft having passages extending through said pulley; and a base connected with said bracket shaft for connecting said bracket shaft with a structure, said base including: an enclosed oil plate portion having inlets and outlets fluidly connected with said bracket shaft passages, said oil plate portion in a circumferentially alternating radial fashion circulating said hydraulic fluid; and an enclosed coolant plate portion juxtaposed between said oil plate portion and the structure, said coolant portion having inlets and outlets for ingress and digress of the coolant from a remote cooler.