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Hilliard Patents

United States Patents

Differential Drives or Power Transmission Products
Patent No.Title
12,686,265Positive Drive Differential
12,496,902Positive Drive Differential with Pinion Disconnect
11,421,769Bi-directional Overrunning Clutch Differential with Output Hub Supports
11,236,811Center Differential and Drive System for Four Wheel Drive
11,131,350Power Transmitting Clutch and Disconnect
12,104,659Flexible Armature Plate for an Electro-magnetic Overrunning Clutch
10,989,258Flexible Armature Plate for an Electro-magnetic Overrunning Clutch
9,856,930Bi-directional Overrunning Clutch with Outer Spring for a Drive Axle
9,360,059Twin Ratio Differential with Bi-directional Overrunning Clutch
8,840,514Bi-directional Overrunning Clutch with Improved Indexing Mechanism
9,272,620True Four-Wheel Drive System for Vehicle
8,857,589Friction Disk Mechanism for Bi-directional Overrunning Clutch
8,919,513Bi-directional Overrunning Clutch Having Split Roll Cage
9,022,195Bi-directional Overrunning Clutch Having Split Cage and Drag Mechanism
8,857,294Engagement Control Assembly for a Bi-directional Overrunning Clutch
Other Patents May Be Pending
CVT Transmission Products
Patent No.Title
12,331,798Spring and Damper Assembly for a Centrifugal Clutch in a Continuously Variable Transmission
12,146,568Driven Clutch with Dual Helix Assembly For Continuously Variable Transmission
8,651,986Drive Clutch for a Continuously Variable Transmission with Engine Braking and Built in Belt Protection
8,613,351Centrifugal Clutch with Heat Mitigating Spring Arrangement
Other Patents May Be Pending
Centrifugal Clutch Products
Patent No.Title
9,278,422System for Dressing a Centrifugal Clutch
7,717,250Tunable Centrifugal Clutch
Other Patents May Be Pending
Friction Drive Products
Patent No.Title
8,857,594Friction Drive Clutch Having Ramped Members
Other Patents May Be Pending

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