Abrading – Frame or mount – Portable abrader
Patent
1994-05-06
1995-11-07
Rose, Robert A.
Abrading
Frame or mount
Portable abrader
451344, B24B 2300
Patent
active
054643660
ABSTRACT:
A portable abrading tool including a cylinder body containing a piston which is reciprocable relative to the body under the control of a valve mechanism, a shoe for carrying sandpaper or another abrading element which is reciprocated in a straight line by the piston but oppositely from the reciprocating movement of the piston, a counterweight which is reciprocated essentially in unison with the piston but oppositely from the shoe, and means yieldingly urging the piston and counterweight in a predetermined axial direction and yieldingly urging the shoe in the opposite direction relative to the body to assure that when the operation of the tool is stopped the moving parts of the tool will automatically return to a position in which the valve mechanism is able to deliver fluid to the piston and cylinder structure in a manner recommencing the reciprocating movement. The yielding means preferably take the form of a spring contained within a recess in the underside of the body vertically between the body and shoe of the device and acting to apply force in opposite directions to the counterweight and the body.
REFERENCES:
patent: 1017388 (1912-02-01), Dickson
patent: 2276534 (1942-03-01), Burleigh
patent: 2499962 (1950-03-01), Manll et al.
patent: 2772663 (1956-12-01), Larson
patent: 2786950 (1957-03-01), Carmichael et al.
patent: 4145847 (1979-03-01), Hutchins
patent: 4228620 (1980-10-01), Hutchins
patent: 5001869 (1991-03-01), Hutchins
patent: 5038523 (1991-08-01), Farbor et al.
Green William P.
Hutchins Manufacturing Company
Morgan Eileen P.
Rose Robert A.
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