Particulate material intercepting arrangement for a hand held to

Details Particulate material intercepting arrangement for a hand held to Particulate material intercepting arrangement for a hand held to

1977-12-22

1980-06-17

Pate, III, William F.

Boring or penetrating the earth

With above-ground means for handling drilling fluid or cutting

Fluid or cuttings directing or receiving means engaging bore...

173 21, 173163, B23B 30166, B23B 4500

Patent

active

042079535

ABSTRACT:
A dust-intercepting member is so mounted on a hand-held power tool as to contact a structure being acted upon around the tool element of the power tool, by a mounting arrangement which includes two hollow elongated mounting members one of which is received within the other for telescoping relative thereto while being retained against rotation with respect to the other mounting member about the common axis of the mounting members, and a helical compression spring the ends of which are respectively received in the interiors of the mounting members and urge the latter in opposite directions. The other mounting member is attached to an auxiliary hand grip which, in turn, is mounted on a cylindrical extension of the housing by a quick-release clamping arrangement. A setting ring on the inner one of the mounting members determines the depth of penetration of the tool element into the structure. A depth-determining profiled rod is displaceably and arrestably mounted on the auxiliary hand grip. The outer one of the mounting members is connected to the profiled rod when the intercepting arrangement is mounted on the auxiliary hand grip.

REFERENCES:
patent: 1664786 (1928-04-01), Mumovich
patent: 2348100 (1944-05-01), Wadsworth
patent: 2719025 (1955-09-01), Store
patent: 2990024 (1961-06-01), Allsburg
patent: 3456740 (1969-07-01), Paule et al.
patent: 3788423 (1974-09-01), Nittinger
patent: 3935909 (1976-02-01), Mabuchi et al.
patent: 4064952 (1977-12-01), Lechner

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