US2984908A - Paint scraper - Google Patents

Description

May 23, 1961 A. M. DYER PAINT SCRAPER Filed May 2a, 1958 FIG 3 ARTHUR M.DYER 5 INVENTOR.

BYJM r United States Patent PAINT SCRAPER Arthur M. Dyer, 523 N. Graves, El Caion, Calif.

Filed May 26, 1958, Ser. No. 737,559

4 Claims. (Cl. 30-272) The present invention relates to a power actuated paint scraper and particularly to a paint scraper in which the scraping element is a razor blade and in which reciprocating movement is imparted to the blade.

The scraper of the present invention includes a main frame which carries a motor, preferably of the electric type. This motor imparts movement to the scraping element. Preferably the mechanism is such as to impart reciprocating movement to the scraping element.

The scraper, of course, extends outwardly of the frame and is provided with a guard for guarding the cutting edge of the scraper and for guarding against accidental touching of the cutting edge.

Means is provided for resiliently connecting the guard with the frame so as to biasingly hold the cutting edge of the scraper off of a horizontal surface when the guard rests on such surface and when the scraper is not being used, but which means yields under pressure so that the scraper touches the surface during operation thereof.

Preferably two blades are provided, one extending from one side of the frame and the other from the opposite side of the frame. Each of these blades is provided with a guard and each of the guards is resiliently connected with the frame, for the purpose hereinbefore specified.

Further objects and advantages of the present invention will be apparent from the following description, reference being had to the accompanying drawings wherein a preferred form of embodiment of the invention is clearly shown.

In the drawing:

Figure 1 is a bottom plan view of the improved scraper, the bottom Wall of the frame being removed for the purpose of showing the actuating mechanism more clearly;

Figure 2 is a longitudinal sectional view taken substantially along the line 22 of Figure 1;

Figure 3 is a sectional view taken substantially along line 3-3 of Figure 2, but on a somewhat larger scale;

Figure 4 is an end view of the scraper; and

Figure 5 is a side view of the scraper.

Referring more in detail to the drawing the scraper 20 includes a main frame 22 including opposite side walls 24 and 26, a top wall 28 and a bottom wall 30. The opposite ends 32 and 34 of the frame are open. The side walls 24 and 26 are provided with two pairs of longitudinally extending grooves 32 and 34 and these grooves function as crosshead guides for crossheads 36 and 38.

The top wall 28 of the frame 22 carries an electric motor 40 which is fed by a cable 42. The motor includes a shaft 44 which extends through an opening 46 in the top wall 28 and such shaft carries a flywheel 48 disposed within the frame 22 and directly below the top wall 28. The bottom of the flywheel 48 is provided with an oval shaped groove 50.

Crosshead 36 carries an upwardly extending pin 52 at the inner end thereof and crosshead 38 carries a pin 54, also at the inner end thereof. These pins extend upwardly and into the groove 50 of the flywheel 48.

Thus it will be seen that as the flywheel 48 is rotated by the motor 40, reciprocating movement will be imparted to the crossheads 36' and 38, since the pins 52 and 54 must follow the rotation of the groove 50.

The outer end of the crosshead 36 carries an extension 56 and the outer end of crosshead 38 carries a similar extension 58. Scrapers in the form of razor blades 60 are removably carried by the outer end of extensions 56 and 58, there being screws 62 provided for fastening the blades in position.

Guards 64 and 66 are carried by a resilient mechanism including resilient bars 68 and 70, preferably made of steel. These bars are suitably secured to the opposite side walls 24 and 26 by clips 72. The guards 64 and 66 each includes a front wall 74, disposed parallelly of the cutting edge 79 of the blades 60 and side walls 76 and 78. The rods 68 and 70 are attached to these side walls.

As is seen more clearly from Figure 5 the rod 68 is disposed angularly with respect to the frame 22. The rod 70 is likewise disposed on the opposite side of the frame 22 so that, when no downward pressure is applied to the frame 22, the frame 22 is biased upwardly oif of the surface 80, and likewise the cutting edges 79 are spaced from the surface so that the surfaces 76 are not dulled by accidentally striking extraneous substances.

:In using the device a suitable switch is actuated to cause rotation of the motor 40 which in turn will cause reciprocation of the razor blade 60. Then by pressing downwardly upon the frame 22 the cutting edges 79 will be forced against the surface 80, and in their reciprocation will remove paint spots, i.e. those splashed on window panes. The guards 64 and 66 protect the attendant from the reciprocating movement of the blades.

While the form of embodiment of the present invention as herein disclosed constitutes a preferred form, it is to be understood that other forms might be adopted, all coming within the scope of the claims which follow.

I claim:

1. A paint scraper comprising in combination, a frame; a driving means carried by the frame; a driven means in horizontal force transmitting relationship with said driving means; a paint removing means fastened to said driven means, said paint removing means having a cutting edge; and resilient means extending below the frame for biasingly holding the cutting edge off of a horizontal surface when the paint scraper is at rest on said surface, said resilient means being yieldable under extraneous pressure from above whereby the cutting edge is brought into contact with said surface when sufiicient extraneous pressure is exerted from above.

2. A paint scraper comprising in combination, a frame; a driving means carried by the frame; a driven means in horizontal force transmitting relationship with the driving means and including a scraper extending beyond the frame, said scraper having a cutting edge; guard means for the scraper; and resilient means connecting the guard means and frame for biasingly holding the scraper off of a horizontal surface when the guard means is at rest on such surface said resilient means being yieldable under extraneous pressure from above whereby the cutting edges are brought into contact with said surface when suflicient extraneous pressure is exerted from above.

3. A paint scraper as defined in claim 2 characterized in that the guard extends forwardly of the cutting edge of the scraper.

4. A paint scraper as defined in claim 2 characterized in that the guard extends forwardly of the cutting edge of the scraper and beyond both opposite sides of the scraper.

(References on following page) 3 References Cited in the file of this patgnt 2,367,945 Jorgflnsen Jan. 23, 1945 2,422,005 Frank June 10, 1947 UNITED STATES PATENTS 2,589,138 Reno Mar. 11, 1952 I 9191 laRue P 20, 0 2,601,183 Unsinger June 17, 1952 1,313,462 Brown 191 1919' 5 2,793,435 Colicci May 28, 1957 2,161,335 Cherry June 6, 1939

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