Tool driving or impacting – Drive adjustable to completely change kind of drive
Patent
1991-03-19
1992-11-10
Watts, Douglas D.
Tool driving or impacting
Drive adjustable to completely change kind of drive
173105, 173133, B25D 1104
Patent
active
051616246
ABSTRACT:
Tool for driving fastening elements into a hard receiving material, such as concrete, masonry, rock and the like, has a first device (1) for drilling a fastening element into the hard material and a second device (2) for axially propelling the fastening element into the receiving material after it has been partly drilled in. The first device (1) provides a borehole in the hard receiving material by applying rotary movement to the fastening element, possibly with the addition of axially directed striking force. The second device (2) completes the insertion of the fastening element into the receiving material by directing an axial force produced by high pressure gases against the partly drilled in fastening element.
REFERENCES:
patent: 2929134 (1960-03-01), Mosher
patent: 3370655 (1968-02-01), Chromy
patent: 3385378 (1968-05-01), Weber et al.
patent: 3403738 (1968-10-01), Burkhart et al.
patent: 3620312 (1971-11-01), Krasnoff
patent: 3640351 (1972-02-01), Coyne et al.
patent: 3866692 (1975-02-01), Stelljes
patent: 4134460 (1979-01-01), Klemm
patent: 4239143 (1980-12-01), Johnson
Beck Josef
Maier Michael
Mark Fritz
Hilti Aktiengesellschaft
Smith Scott A.
Watts Douglas D.
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