Speed and temperature responsive drive apparatus
AssigneeBorg-Warner Corporation
InventorArthur M. McIntosh
Life of this patent
Estimating the term…
Abstract
Speed and temperature responsive drive apparatus includes a friction clutch which may be interposed between a vehicle engine and its associated cooling system fan. The clutch is biased toward engagement by a conventional spring and also by a thermal spring. A bladder develops a centrifugal pressure upon rotation of the apparatus, which pressure relieves the biasing forces of both springs.
Claims10
Apparatus comprising a clutch having engaged and disengaged conditions, and control means for said clutch, said control means including means providing a force biasing said clutch toward one condition, speed responsive means for relieving said biasing force, and temperature responsive means for modulating the speed at which said biasing force is relieved.
Apparatus comprising a body rotatable on an axis, said body including a fixed member and a cylinder, a piston slidable axially relative to said cylinder, said piston including a movable member slidable axially relative to said fixed member, conventional and thermal springs biasing said movable member toward said fixed member, and a bladder in said cylinder, said apparatus being constructed and arranged such that a centrifugal pressure is developed in said bladder upon rotation of said body, said pressure tending to slide said piston and movable member away from said fixed member against the biasing forces of said springs.
Dependencies are inferred from the claim text.