Sonically driven paint scraper

Claim 2

A sonic scraping apparatus, said apparatus comprising: housing means; a blade-supporting member supported by said housing; a scraping blade carried by said supporting member for a work stroke and disposed to engage a surface of a workpiece; an alternating force oscillator; elastic transmission means operatively supporting said oscillator on said housing for oscillator movement substantially in the plane parallel to that of said work stroke; and, said elastic transmission means being effective to transmit intermittent, short duration high forces to said scraping blade in the direction of said work stroke to produce a series of intermittent work strokes and to transmit intermittent long duration low forces to said scraping blade in the opposite direction to store energy and impulse between said work strokes.

Claim 3

The apparatus of claim 1 wherein: said supporting member comprises a vertically disposed elongated rigid member supported at one end from said housing means and supporting said blade for a work stroke transverse to the longitudinal axis of said scraping supporting member.

Claim 4

The apparatus of claim 2 wherein: said elastic transmission means comprises an elongated elastic member disposed adjacent to and substantially parallel to said supporting member; said elastic means being operatively coupled at one end to said supporting member and carrying said oscillator at the other end.

Claim 5

The apparatus of claim 1 including: means cooperative with said workpiece to prevent a backstroke of said blade.

Claim 6

A sonic scraping apparatus, said apparatus comprising: housing means; adjustable support means operatively connected to and extending from said housing for engagement with a workpiece; an elongated substantially rigid work member depending from said housing means and supported thereby for a work stroke transverse to the longitudinal axis of said work member; a work blade carried by one end of said work member and adapted to engage a workpiece; an oscillator; an elongated elastic member disposed adjacent to and extending substantially parallel to said work member; said elastic member supporting said oscillator for oscillation within the plane parallel to said work stroke and operatively coupled to said work member for delivery of periodic short duration high forces to said work member in the direction of said work stroke to thereby impose said work stroke on said work member and to impose long duration low forces thereto between said work strokes to thereby store energy and impulse for said work strokes.

Claim 7

A sonic scraping apparatus, said apparatus comprising: housing means; adjustable support means operatively connected to and extending from said housing for engagement with a workpiece; an elongated substantially rigid work member depending from said housing means and supported thereby for a work stroke transverse to the longitudinal axis of said work member; a work blade carried by one end of said work member and adapted to engage a workpiece; an oscillator; an elongated elastic member disposed adjacent to and extending substantially parallel to said work member; said elastic member supporting said oscillator for oscillation within the plane parallel to said work stroke and operatively coupled to said work member for delivery of periodic short duration high forces to said work member in the direction of said work stroke to thereby impose said work stroke on said work member and to impose long duration low forces thereto between said work strokes to thereby store energy and impulse for said work strokes.

Claim 8

The apparatus of claim 5 wherein said work member includes ratchet means adapted to engage said workpiece and prevent a backstroke of said blade.

Claim 9

The apparatus of claim 6 wherein said ratchet means engages said workpiece ahead of said work blade.

Claim 10

The apparatus of claim 6 wherein said ratchet means engages said workpiece behind said work blade.