Metal working – Means to assemble or disassemble – Puller or pusher means – contained force multiplying operator
Patent
1998-02-05
1999-11-02
Watson, Robert C.
Metal working
Means to assemble or disassemble
Puller or pusher means, contained force multiplying operator
29280, 29282, 29269, B23P 1904
Patent
active
059746440
ABSTRACT:
A tool for dismounting a bicycle pedal crankarm from a crankshaft. A bicycle crankshaft has a mounting end and the crankarm has a crank mount having a bore therethrough having on one end a socket mounted on the crankshaft mounting end. The tool includes a puller and a handle. The puller comprises a housing having a column bore therein and having a proximal end and a distal end having screw threads adapted for mating attachment with internal screw threads in the crank mount bore. A column comprised of a piston and a rolling bearing is contained in the column bore and reciprocally slidable therein. The handle is pivotally connected to the puller and pivotable 180.degree. between an attachment position and a dismount position. Pivotal movement of the handle between an attachment position and a dismount position when the housing is attached to the crankarm mount moves a cam that moves the column against the crankshaft mounting end to dismount the crankarm. Preferably, the handle pivot axis is off the contact axis defined as the direction of column movement through point of contact between the cam and the column.
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Tervo Calif
Watson Robert C.
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