Tool shaft for a tool of the percussive and rotative type

Details Tool shaft for a tool of the percussive and rotative type Tool shaft for a tool of the percussive and rotative type

1982-07-19

1985-04-23

Weidenfeld, Gil

Cutting by use of rotating axially moving tool

Tool or tool with support

Including detailed shank

279 195, 279 89, 173133, 403349, B23B 3106

Patent

active

045126925

ABSTRACT:
A tool shaft, especially for drills of the percussive type, such as hammer drills, is adapted to be mounted in a tool holder having fixed driving elements, and the shaft is therefore provided with guiding recesses driving recesses and interconnecting transition recesses which recesses in combination with the driving elements form a type of bayonet joint.
In order to improve the universal applicability of the tool shaft also in connection with tool holders of the type having radially movable driving elements, the driving recesses are formed with a radial depth exceeding that of the guiding recesses, and each of the guiding recesses has a cross-sectional shape so as to define a rib or edge between each associated pair of guiding and driving recesses so as to prevent spherical or cylinder shaped driving elements of the radially movable type from being moved unintentionally from the driving recess into the associated guiding recess.

REFERENCES:
patent: 2039855 (1936-05-01), Stone
patent: 2219907 (1940-10-01), Ross
patent: 2367458 (1945-01-01), Coplen
patent: 2572840 (1951-10-01), Curtis
patent: 2823040 (1958-02-01), Fischer
patent: 4047722 (1977-10-01), Nielsen et al.

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