Handle for a file having polygonal cross section

Details Handle for a file having polygonal cross section Handle for a file having polygonal cross section

1996-12-05

1998-06-09

Bishop, Steven C.

Chucks or sockets

Socket type

Bottomless

279102, 407 2915, 16114R, 81489, 30340, 403361, B23D 7104, B25G 310

Patent

active

057623449

ABSTRACT:
A file of polygonal cross section is secured frictionally in a hole of a handle. The hole has as many corners as the file, and a surface extends between adjacent pairs of the corners of the hole. Each of those surfaces includes a concave segment and a convex segment. The concave segment is shaped such that relative rotation between the handle and file causes the corners of the file to tightly engage the concave segments to secure the file within the handle.

REFERENCES:
patent: 281626 (1883-07-01), French
patent: 2809846 (1957-10-01), Whiteford
patent: 2977668 (1961-04-01), Maness
patent: 4327465 (1982-05-01), Moritsch

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