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US Patent: 5,369,863
Bicycle Crank Arm Puller
Mark J. Hasenberg - Kenosha, WI
Steven R. Wente - Kenosha, WI

USPTO Classifications:

Tool Categories:

Snap-On, Inc. - Kenosha, WI

Not known to have been produced

none listed

Patent Dates:
Applied: Oct. 15, 1993
Granted: Dec. 06, 1994

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Snap-On Tools Company History
Emrich & Dithmar - patent attorneys


A bicycle crank arm puller includes a tubular insert externally threaded for threaded engagement in an internally threaded portion of a bore in a crank arm, the other portion of the bore receiving an axle end in press-fitted engagement. The insert has an enlarged, radially outwardly extending, trilobular handle. A drive screw is threadedly engaged through the tubular insert and has a part-spherical bearing end engageable with the axle end. A square drive socket on the outer end of the drive screw receives the drive lug of an associated lever member.

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