Hammer drill for performing rotary drilling or percussive drilli

Details Hammer drill for performing rotary drilling or percussive drilli Hammer drill for performing rotary drilling or percussive drilli

1982-06-25

1984-03-06

Kazenske, E. R.

Tool driving or impacting

Drive adjustable to completely change kind of drive

Adjustable to impacting device

173 13, 173133, 173114, 279 75, 279 194, E02D 702

Patent

active

044348592

ABSTRACT:
A hammer drill for performing percussive drilling or rotary drilling includes a housing and a tool holder mounted on and axially displaceable relative to the housing, the tool holder contains a retainer sleeve mounting locking member for securing the shank of a tool in the holder. When the hammer drill is used only for rotary drilling, the retainer sleeve is displaced into contacting engagement with the housing for centering the tool holder. The tool holder includes stops for securing the locking members against axial displacement during rotary drilling. One stop is movable relative to the retainer sleeve and can be locked in position. Another stop forms part of the retainer sleeve. The stops combine with the closed ends of the recesses in the tool shank for holding the locking members against axial displacement.

REFERENCES:
patent: 3000225 (1961-09-01), Taylor
patent: 3145782 (1964-08-01), De Bruin
patent: 3507337 (1970-04-01), Chromy
patent: 3789933 (1974-02-01), Jarecki
patent: 3809168 (1974-05-01), Fromm
patent: 4107949 (1978-08-01), Wanner et al.
patent: 4131165 (1978-12-01), Wanner et al.
patent: 4174113 (1979-11-01), Eckman
patent: 4349074 (1982-09-01), Ince

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