Dust guard

Details Dust guard Dust guard

1991-11-22

1995-05-30

Bishop, Steven C.

Cutting by use of rotating axially moving tool

With product handling or receiving means

B23B 4500

Patent

active

054196639

ABSTRACT:
A dust guard fits onto the stationary housing of a portable electric drill with a resilient annular terminal portion. An elongate, axially compressible, elastic cylindrical body portion extends from the terminal portion, surrounding the drill bit and forming a chamber to receive debris and dust from the drilling process. The free end of the body portion is provided with a resilient, non-marring annular end piece for engaging the surface of the workpiece being drilled. As the drill bit penetrates the workpiece, the end piece is forced against the body portion, causing it to elastically shorten. The terminal portion 5 has external screw threads 9, and adapters with mating screw threads are provided. These adapters 6, 12, 13, 14 and 15 have progressively greater inside diameters for engaging drill housings having greater diameters than those that would fit the terminal portion 5.

REFERENCES:
patent: 3339435 (1967-09-01), Heitz
patent: 3936213 (1976-02-01), Kappel
patent: 4848980 (1989-07-01), Broussard
patent: 4921375 (1990-05-01), Famulari
patent: 4955984 (1990-09-01), Cuevas
patent: 5292210 (1994-03-01), Nowick

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