Boring or penetrating the earth – With above-ground means for handling drilling fluid or cutting – Fluid or cuttings directing or receiving means engaging bore...
Patent
1974-08-14
1976-01-27
Brown, David H.
Boring or penetrating the earth
With above-ground means for handling drilling fluid or cutting
Fluid or cuttings directing or receiving means engaging bore...
175 84, E21C 700
Patent
active
039346617
ABSTRACT:
A dust cap particularly for use with an overhead rotary hammer. The dust collector is a cup-like member with a bellows side wall, integrally formed in one piece. It has a thickened neck to fit on the tool shank below the chuck, thereby encompassing the chuck and the lower end of the anchor. Dust is efficiently caught in that the bulk of the dust passes through the anchor and chuck, and then directly into the dust collector cup, plus most of the dust outside the anchor is also caught as it falls around the anchor. The bellows side wall facilitates changing tools and removing anchor ends.
REFERENCES:
patent: 1131009 (1915-03-01), Rylander
patent: 2107552 (1938-02-01), Smith
patent: 2643088 (1953-06-01), Hornack
patent: 2792199 (1957-05-01), Becker et al.
patent: 2918290 (1959-12-01), Werstein
patent: 3339435 (1967-09-01), Heitz
patent: 3340915 (1967-09-01), Passer
patent: 3499641 (1970-03-01), Peterson
patent: 3583821 (1971-06-01), Shaub et al.
Sauerwein William D.
Sides Daniel Harrison
Brown David H.
Kovensky William
Murphy Edward D.
Slotnik Joseph R.
The Black and Decker Manufacturing Company
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