Hand tool for mounting/dismounting bicycle cranks

Details Hand tool for mounting/dismounting bicycle cranks Hand tool for mounting/dismounting bicycle cranks

1991-03-28

1992-03-31

Smith, James G.

Tools

Wrench, screwdriver, or driver therefor

Having work engaging and force exerting portion inserted...

81437, 81439, 811772, B25B 2300

Patent

active

050997262

ABSTRACT:
In a hand tool for mounting and dismounting bicycle cranks of the type comprising a handle having a hexagonal hole alternatively mounted on a hexagonal collar at the middle of a bolt, which has a hexagon socket at one end and an outer thread portion at an opposite end, or a hexagonal neck at one end of a nut, which has an outer thread portion and is movably mounted on said bolt, to drive said bolt or nut to rotate, wherein said handle has a hexagonal stub tenon, a wedgelike projecting strip and one pair of stub rods respectively made at one end driving a variety of crank fastening caps having different shape of driving tool mounting hole; said bolt has a front rod in relatively smaller outer diameter movably attached with a circular block to protect the front end of the outer thread portion of said bolt. The handle is extendible so that the arm of force can be increased for labor-saving operation.

REFERENCES:
patent: 4070932 (1978-01-01), Jeannotte
patent: 4580469 (1986-04-01), Lordahl
patent: 4691599 (1987-09-01), Schultz
patent: 4960017 (1990-10-01), Hsiao

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