Well scrubber

Details Well scrubber Well scrubber

2006-10-17

2006-10-17

Bagnell, David (Department: 3672)

Wells

Brushing, scraping, cutting or punching-type cleaners

C015S104200

Reexamination Certificate

active

07121336

ABSTRACT:
A cylindrical brush for scrubbing the inside surface of a pipe is made of bristles attached to a springy helix. The diameter of the brush is greater than the inside diameter of the pipe. When the brush is pushed through the pipe the helix collapses and compacts the bristles to scrub the surface. When the brush is released in the pipe, the helix expands and spreads the bristles; thereby aiding in release of debris collected on the bristles during the scrubbing.

REFERENCES:
patent: 354478 (1886-12-01), Kear
patent: 1677050 (1928-07-01), Reed et al.
patent: 1837931 (1931-12-01), Walbrohl
patent: 2296514 (1942-09-01), Gibson
patent: 2415729 (1947-02-01), Dana
patent: 3178771 (1965-04-01), Claiborne et al.
patent: 3460180 (1969-08-01), Girard
patent: 3952359 (1976-04-01), Rosseau
patent: 5030291 (1991-07-01), Titmas
patent: 6775872 (2004-08-01), Appleton et al.

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