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A fluid shear coupling apparatus including a driving member comprising a rotor mounted to a shaft. A driven member including a bearing housing is mounted to the shaft. A complementary surface between the driven member and the driving member is provided between which a shear fluid provides variable c

A fluid shear coupling apparatus including a driving member comprising a rotor mounted to a shaft. A driven member including a bearing housing is mounted to the shaft. A complementary surface between the driven member and the driving member is provided between which a shear fluid provides variable coupling according to the proportion of fluid in the reservoir vis-a-vis the fluid shear chamber defined by the complementary surface. A temperature responsive valve is provided to modulate the shear fluid level. The valve may modulate an overlapping inlet having a constant area. An overlap inlet may be define by an arcuate slot or by a fixed size valve aperture. The valve may be pivotable on a valve axis which is eccentric to, and radially outward of, the common axis of the driving and driven members. Temperature responsive rotation of the valve member may be provided by coupling links or by gearing mechanism.

대표청구항 ▼

A fluid shear coupling apparatus comprising: a driving member including a rotor and a shaft connected to said rotor and adapted and configured for transmitting rotational drive from an external drive source to said rotor, said rotor having a first shear surface; a driven member including a second sh

A fluid shear coupling apparatus comprising: a driving member including a rotor and a shaft connected to said rotor and adapted and configured for transmitting rotational drive from an external drive source to said rotor, said rotor having a first shear surface; a driven member including a second shear surface configured and positioned complementary to said first shear surface of said rotor and defining therewith a fluid shear chamber cooperable with a shear fluid received therein for transmitting torque between said driving member and said driven member; bearing mount means for mounting said driven member to said driving member for relative rotation between said driven member and said driving member about a common axis; a shear fluid reservoir defined by said driven member; a separator wall between said shear fluid reservoir and said fluid shear chamber, said separator wall having a fluid input aperture communicating said shear fluid reservoir with said fluid shear chamber at a first location radially inward of said first and second complementary fluid shear surfaces; fluid return means for returning shear fluid from said fluid shear chamber at a second location radially outward of said first and second complementary fluid shear surfaces to said shear fluid reservoir; a movable valve member located along said separator wall over said fluid input aperture, said valve member having a valve aperture therein, said valve aperture overlapping said fluid input aperture; and means for moving said valve member with respect to said separator wall, wherein said valve member is pivotally mounted with respect to said separator wall with said means for moving said valve member being operative to radially displace said valve aperture relative to said common axis.