Drilling mechanism optionally usable as a rotary drill or a hamm

Details Drilling mechanism optionally usable as a rotary drill or a hamm Drilling mechanism optionally usable as a rotary drill or a hamm

1983-11-04

1986-04-29

Schran, Donald R.

Tool driving or impacting

Drive adjustable to completely change kind of drive

Adjustable to impacting device

173 13, 279 19, E02D 702

Patent

active

045850771

ABSTRACT:
A manual drilling mechanism can optionally be employed for (i) rotary drilling wherein the rotating motion of a drive spindle may be transmitted to a rotary drilling tool, or (ii) hammer drilling wherein an impact bolt guided in the drive spindle is impacted against the end of a hammer drilling tool. The latter tool is axially movably guided in a hammer drill holder. A drill chuck is attached to the spindle. The chuck carries jaws for clamping the rotary drill tool. The jaws are movable between tool-clamping and tool-release positions. The chuck has a passage for the impact bolt. The passage has a diameter slightly smaller than the space between the jaws when the latter are in the tool-clamping position. The chuck forms a receiving sleeve for the drill hammer holder.

REFERENCES:
patent: 3000225 (1961-09-01), Taylor
patent: 3044790 (1962-07-01), Stoner
patent: 3145782 (1964-08-01), Bruin
patent: 3430707 (1969-03-01), Rees
patent: 3507337 (1970-04-01), Chromy
patent: 3730281 (1973-05-01), Wood
patent: 4131165 (1978-12-01), Wanner et al.
patent: 4236588 (1980-12-01), Moldan et al.
patent: 4434859 (1984-03-01), Rumpp et al.
Brochure article, 2 pgs. "HILTI" printed in Liechtenstein, 1981.

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