Adjustable bottom bracket assembly for bicycles

Details Adjustable bottom bracket assembly for bicycles Adjustable bottom bracket assembly for bicycles

1987-06-03

1989-02-28

Smith, Gary L.

Endless belt power transmission systems or components

Means for adjusting belt tension or for shifting belt,...

Pulley or guide roll has eccentric mount for shifting or...

384431, 384458, F16H 710, F16C 3500

Patent

active

048081477

ABSTRACT:
An adjustable bottom bracket assembly for a bicycle comprises a body member and a wedge member, each having a circular cylindrical external surface in close fit with an internal circular cylindrical surface of a bottom bracket shell. The body and wedge members have abutting complementary planar wedge surfaces oriented obliquely to the axes of their cylindrical surfaces. A drive device, such as a screw, moves the body and wedge members axially to wedge them securely in an adjusted position in the bottom bracket shell.

REFERENCES:
patent: 697944 (1902-04-01), Johnson
patent: 2280662 (1942-04-01), Pawsat
patent: 2676063 (1954-04-01), Whitt
patent: 3918779 (1975-11-01), Halliger et al.
patent: 4009742 (1977-03-01), Ziegelmeyer
patent: 4539861 (1985-09-01), Nishikawa

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