Expandable pulley

F - Mech Eng,Light,Heat,Weapons – 16 – H

Patent

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Details

F16H 55/36 (2006.01) F16H 7/02 (2006.01)

Patent

CA 2705264

An expandable pulley comprising a plurality of adjacent segments, each segment being radially moveable, each segment slidingly engaged with a pin member, each pin member having an engagement with each segment such that each segment is moveable in a direction substantially at an angle (.alpha.) to a radial along each pin member, a moveable guide member engaged with each segment for spatially locating each segment with respect to another segment, a counterweight cooperatively connected to each segment and cooperatively engageable with each pin member, each counterweight exerting a force opposing a segment centripetal force, and each pin member connected to a hub.

La présente invention concerne une poulie expansible qui comprend une pluralité de segments adjacents, chaque segment étant mobile de façon radiale, chaque segment étant en prise coulissante avec une tige, chaque tige étant en prise avec chaque segment de sorte que chaque segment est mobile dans une direction sensiblement orientée à un angle (a) par rapport à une partie radiale le long de chaque tige. La poulie comporte également un élément de guidage mobile, en prise avec chaque segment de façon à positionner spatialement chaque segment par rapport à un autre segment, un contrepoids connecté en coopération à chaque segment et pouvant entrer en prise, en coopération, avec chaque tige. Chaque contrepoids exerce une force qui s'oppose à une force centripète de segment, et chaque tige est connectée à un moyeu.

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