Reciprocating pneumatic sanding and rubbing machine

Details Reciprocating pneumatic sanding and rubbing machine Reciprocating pneumatic sanding and rubbing machine

1978-05-08

1980-02-19

Maslousky, Paul E.

Motors: expansible chamber type

Cyclically operable

Working member reverses distributor through part movable...

91533, 92136, 92151, F01L 3118, F15B 1116, F01B 900, F01B 700

Patent

active

041888570

ABSTRACT:
A reciprocating sanding and rubbing machine has a shoe portion to which the sanding or rubbing member is attached, this shoe portion being connected through a rack and pinion drive gear assembly to a symmetrically balanced piston assembly which is reciprocally driven by a pneumatic drive. The piston assembly is greater in length than half the total length of the tool, and moves in a carriage block reciprocally relative to the shoe. Two pistons and two associated pairs of compression chambers are employed, one of these pairs of chambers being used for drive in one direction, and the other pair being used for drive in an opposite direction. The pistons are supported on sleeve bearings which align them within the cylinder chamber, thereby minimizing wear on the pistons and the cylinder walls. Reciprocating motion of the piston is achieved by means of pneumatic valving arrangement employing a rotatable valving member which is driven by a rack and pinion gear assembly in response to motion of the shoe. The pneumatic drive is fed through the valving arrangement in a lateral direction, and venting is also achieved laterally so as to eliminate downward pressure on the components of the tool which would tend to contribute friction.

REFERENCES:
patent: 1780329 (1930-11-01), Bard
patent: 2376009 (1945-05-01), Sacchini et al.
patent: 2983256 (1961-05-01), Seeloff
patent: 3131606 (1964-05-01), Oelke
patent: 3485141 (1969-12-01), Ott et al.
patent: 3563134 (1971-02-01), Rodstein

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