Water feed for sanding tool

Details Water feed for sanding tool Water feed for sanding tool

1994-11-29

1997-01-28

Rose, Robert A.

Abrading

Accessory

Cooling

451357, 451295, B24B 2300

Patent

active

055973485

ABSTRACT:
A portable abrading or polishing tool including a tool body carrying an air motor which drives an abrading or polishing head relative to the tool body, with the tool including an aspirator energized by pressurized air for inducing a flow of water to a work surface, and with air being delivered from a source to the motor and the aspirator separately, so that the air passing through the aspirator and to the work surface does not first pass through the motor. A check valve prevents reverse flow of water from the aspirator to the motor when the supply of pressurized air is shut off, to thus prevent damage to the motor by the water. Means are provided for holding the check valve in closed condition even when air is supplied to the motor, to enable lubrication of the tool by air containing entrained lubricant without delivery of the lubricant to the aspirator or work surface.

REFERENCES:
patent: 1698970 (1929-01-01), Shaff
patent: 3110993 (1963-11-01), Grage
patent: 4102084 (1978-07-01), Bloomquist
patent: 4129966 (1978-12-01), Smart et al.
patent: 4490948 (1985-01-01), Hanstein et al.
patent: 4671019 (1987-06-01), Hutchins
patent: 5022190 (1991-06-01), Hutchins
Pp. 24 and 25 of Feb. 1994 issue of "Chilton's Automotive Body Repair News" .

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