초록 ▼

This viscous fluid fan drive clutch has a chamber divider and flow control ring at the face of the clutch plate which prevents fluid bypass of the shear zone and features flow blocker arms depending from the ring which fit within fluid fill passages in the clutch plate to tailor the response time of

This viscous fluid fan drive clutch has a chamber divider and flow control ring at the face of the clutch plate which prevents fluid bypass of the shear zone and features flow blocker arms depending from the ring which fit within fluid fill passages in the clutch plate to tailor the response time of the clutch.

대표청구항 ▼

A bladed fan and hydraulic clutch assembly for inducing a flow of cooling air through a radiator in which engine coolant is circulated comprising an input shaft member adapted to be rotatably driven, clutch plate means rotatably driven by said shaft member, said clutch plate means having a plurality

A bladed fan and hydraulic clutch assembly for inducing a flow of cooling air through a radiator in which engine coolant is circulated comprising an input shaft member adapted to be rotatably driven, clutch plate means rotatably driven by said shaft member, said clutch plate means having a plurality of axially extending and concentric lands, rotatable clutch body means axially spaced from said clutch plate means having a plurality of axially extending and concentric lands interleaved with said lands of said clutch plate means to form a fluid shear zone therebetween, a pump plate fixed to said clutch body means and encasing said clutch plate in said clutch body means, reservoir means for containing a quantity of viscous shear fluid for operating said clutch assembly, an outlet opening for said reservoir, control means for opening and closing said outlet opening, axially extending openings formed in the face of said clutch plate and extending to the concentric lands thereof, annular fluid seal ring means adjacent to said clutch plate openings and operatively interposed between said pump plate and said clutch plate to slidably contact said pump plate and block the flow of fluid outwardly therefrom and blocker arm means extending inwardly from said fluid seal ring means and directly into said axially extending openings for partially blocking a portion of said openings to restrict the flow of fluid therethrough to thereby control the engagement of said clutch, fan blade means extending from said clutch body means, said pump plate having pumping means associated therewith to pump fluid exiting from said shear zone back to said reservoir.