Machine element or mechanism – Elements – Cranks and pedals
Patent
1997-07-11
1999-06-01
Luong, Vinh T.
Machine element or mechanism
Elements
Cranks and pedals
81436, 411302, G05G 114, B25B 1348, F16B 3934
Patent
active
059079800
ABSTRACT:
A tool for fixing a chainwheel to a crank arm assembly of the type wherein a crank axle mounting section of a crank arm mounts to an end of a crank axle. The crank axle mounting section includes a threaded outer surface, and a nut is provided for fixing the chainwheel to the crank axle mounting section. The nut includes a plurality of nut splines disposed on an outer peripheral surface thereof and a threaded inner peripheral surface for meshing with the threaded outer surface of the crank axle mounting section. The tool includes a tool-mount member shaped to be held and turned by a second tool, wherein the tool-mount member defines an opening for receiving the crank axle therethrough. An operating member is formed as one-piece with the tool-mount member and has a plurality of splines extending from an inside surface thereof for meshing with the plurality of nut splines. An auxiliary tool having first and second ends has a grip section disposed in close proximity to the first end, wherein the grip section has a diameter greater than or equal to a diameter of an end of the crank axle. A support section adjacent to the grip section has a diameter less than a diameter of the opening of the tool-mount member so that the support section is fitted within the opening.
REFERENCES:
patent: 4201120 (1980-05-01), Segawa
patent: 4300411 (1981-11-01), Segawa
patent: 4331043 (1982-05-01), Shimano
patent: 4617844 (1986-10-01), Batten
patent: 4648293 (1987-03-01), McCauley
patent: 4732060 (1988-03-01), Stein
patent: 4811626 (1989-03-01), Bezin
patent: 4960017 (1990-10-01), Hsiao
patent: 5078562 (1992-01-01), DeHaitre
patent: 5099726 (1992-03-01), Hsiao
patent: 5251520 (1993-10-01), Lanham
patent: 5363721 (1994-11-01), Hsiao
patent: 5493937 (1996-02-01), Edwards
Deland James A.
Luong Vinh T.
Shimano Inc.
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