Praxis Works LLC

Bell Sports, Inc.

William A Hilgenberg

David R Allen

David M Earle

Kyle Bennett

Ryan Kent Miller

Rainer Pokorny

Allen A Bischofberger

Arvand Ghodrati

A gearbox may include a drive spindle and several interconnected gear clusters arranged in a housing. A first of the gear clusters is coaxially fastened to the spindle, and has an outboard gear and an inboard gear. The first gear cluster drives a belt to operate one or more of the other gear clusters, and the inboard gear is physically divided into a plurality of segments. A shifting system for the gearbox includes an actuator configured to urge the segments of the inboard gear of the first gear cluster into and out of the plane of the belt, such that a gear ratio of the gearbox is changeable without displacing the belt out of the plane.

Bicycle gearbox having segmented sprockets

A gearbox may include a drive spindle and several interconnected gear clusters arranged in a housing. A first of the gear clusters is coaxially fastened to the spindle, and has an outboard gear and an inboard gear. The first gear cluster drives a belt or chain to operate one or more of the other gear clusters, and the inboard gear is physically divided into a plurality of segments. A shifting system for the gearbox includes an actuator configured to urge the segments of the inboard gear of the first gear cluster into and out of the plane of the belt or chain via a toggle and slider mechanism, such that a gear ratio of the gearbox is changeable without displacing the belt or chain out of the plane.

A magnetic hose coupling system for a helmet includes first and second coupling conduit segments magnetically coupled to each other. The first segment includes a hinged clamp at a first end to attach to a forced air intake barb on a motorsport helmet and an angled polygonal mating surface at a second end with magnetic attractors in the polygonal mating surface. The second segment includes an internally threaded first end to attach to a forced air hose and an angled polygonal mating surface at a second end with magnetic attractors in the polygonal mating surface. The polygonal mating surfaces of the first and second segments magnetically couple together and resist rotational and sheer movement of the first and second segments with respect to each other.

Magnetic hose coupling for helmet forced air hose

A gearbox may include a drive spindle and several interconnected gear clusters arranged in a housing. A first of the gear clusters is coaxially fastened to the spindle, and has an outboard gear and an inboard gear. The first gear cluster drives a chain to operate one or more of the other gear clusters, and the inboard gear is physically divided into a plurality of segments. A shifting system for the gearbox includes an actuator configured to urge the segments of the inboard gear of the first gear cluster into and out of the plane of the chain, such that a gear ratio of the gearbox is changeable without displacing the chain out of the plane.

A bottom bracket for a bicycle may include a left bearing cup and a right bearing cup, the two bearing cups configured to be threaded together within a bottom bracket shell. Threading the bearing cups together may result in an axial force being applied to a resilient ring disposed on one of the bearing cups. This axial force may cause an outer diameter of the resilient ring to expand against an inner surface of the bottom bracket shell, thereby effectively locking the bottom bracket into the shell.

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Ben Lomond, CA, United States of America

William A Hilgenberg