Abrasive tool making process – material – or composition – With carbohydrate or reaction product thereof
Patent
1988-05-02
1989-06-20
Parker, Roscoe V.
Abrasive tool making process, material, or composition
With carbohydrate or reaction product thereof
51273, B24B 2304, B24B 5506
Patent
active
048399957
ABSTRACT:
An abrading tool including a body to be held by a user and carrying a motor which moves a unit relative to the body to abrade a work surface by the action of a sheet of sandpaper or other work abrading element carried by the unit, with the unit containing a passage or passages through which a flow of air and entrained particles abraded from the work surface are drawn by suction, and with the unit carrying a flow control valve which is movable with the unit relative to the body of the tool by the motor and is operable to variably restrict the flow of air and particles by suction through the passage or passages in the unit. The movable unit may include a resiliently deformable cushion through which abrading force is applied to the sandpaper or other abrading element and a backing plate structure more rigid than the cushion and containing a chamber into which air and particles flow from passages in the cushion, with the flow control valve being carried by an upper wall of the backing plate structure.
REFERENCES:
patent: 3638362 (1972-02-01), Stoll et al.
patent: 3932963 (1976-01-01), Hutchins
patent: 4184291 (1980-01-01), Martin
patent: 4296572 (1981-10-01), Quintana
patent: 4671019 (1987-06-01), Hutchins
patent: 4671020 (1987-06-01), Hutchins
Advertising Leaflet of Hutchins Manufacturing Company.
Photographs of the Butterfly Valve Element and Aspirator Block.
Green William P.
Hutchins Manufacturing Company
Parker Roscoe V.
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