|Publication number||US3250000 A|
|Publication date||May 10, 1966|
|Filing date||Sep 14, 1964|
|Priority date||Sep 14, 1964|
|Publication number||US 3250000 A, US 3250000A, US-A-3250000, US3250000 A, US3250000A|
|Inventors||Schumann Lawrence R|
|Original Assignee||Schumann Lawrence R|
|Export Citation||BiBTeX, EndNote, RefMan|
|Patent Citations (5), Referenced by (22), Classifications (6)|
|External Links: USPTO, USPTO Assignment, Espacenet|
May 10, 1966 1.. R. SCHUMANN SCRAPING TOOL W m %A Y TM E mm m VC 0 m w R A E C I N E m AV. 4 LB M 4 9 i M 2 w 2 4 MN. 7 av Qw d e l m m United States Patent 3,250,000 SCRAPING TOOL Lawrence R. Schumann, 302 Beacon St., Boston, Mass. Filed Sept. 14, 1964, Ser. No. 396,252 4 Claims. (Cl. 30-171) This invention relates to an improved tool for scraping surfaces such as the floors and walls of buildings. It is .an object of the invention to provide a scraping tool which and original feature of this invention is a groove which,
because of its specific dimension permits adjusting the blades either to left or right at an angle from the handle. The blade in either position enables the scraper to scrape close to a corner or wall on the left or. right. This cannot be done unless the blade is at an angle to the hand. For a more complete understanding of the invention, reference may be had to the following description thereof, and to the drawing, of which FIGURE 1 is a side elevation of a scraping tool embodying the invention;
FIGURE 2 is a partial plan view of the same on a larger scale;
FIGURE 3 is a section on the line- 33 of FIGURE 2;
FIGURE 4 is a partial bottom plan view of the same; and
FIGURE 5 is an exploded perspective view of the same.
The scraping tool shown on the drawing comprises a handle with a rectangular head 12, these parts forming an integral member which can readily be made of wood or any other convenient material. In the under face of the head 12 near its juncture with the handle 10 is a transverse channel or groove 14. A hole 16 is provided through the head 12 about half-way between the channel 14 and the end of the head. This hole is preferably countersunk as at 18 in the upper face of the head 12.
A steel blade 20 is releasably fastened to the bottom surface of the head 12 by a bolt 22 which extends through the blade and the hole 16, a nut 24 being threaded on the portion of the bolt which extends into the countersink 18.
' A washer 25 is used under the nut 24. The blade 20 has a body 26 consisting of two rectangular plates 28, permanently secured together face to face as by spotwelds. The plate 28 has two upturned flanges 32, 34 along parallel edges thereof, each of these flanges making an obtuse dihedral angle with the plate. Similarly, the plate 30 has two down-turned flanges 36, 38 along corresponding parallel edges. All four of these flanges terminate in sharp edges suitable for eifective scraping. When the tool is in use, the upturned flange 34 is disposed within the channel and the down-turned blade 36 at the opposite edge of the blade is in the active position for engagement with the surface to be scraped. As the blade is symmetrical, it can be turned or reversed to put any of the four flanges into the active position.
When the tool is in ordinary use as a scraper, the blade is in the position shown in FIGURE 2, the scraping edges being at right angles to the long axis of thetool.
3,250,000 Patented May 10, 1966 ice When the edge of a floor along a wall is to be scraped,
the blade is drawn along the edge of the floor, the handle 10 will make a small angle with the wall, thus allowing more room between the handle and the wall for the hand of the operator holding the tool. An angle of about 5 is suflicient for this purpose, an angle of this size being indicated in FIGURE 4 of the drawing. An increase in the size of this angle is positively prevented by engagement of the blade 34 withboth side walls of the channel 14.
The bolt 22 passes through an aperture 40 in the center of the blade 20. This aperture may be square as indicated in FIGURE 5. If the bolt is made with a corresponding square portion 42 adjacent to the head 46, the bolt can be held against rotation by grasping the side edges of the blade 20 when the thumb-nut 24 is being turned, thus obviating the need for a wrench or screwdriver to hold the bolt.
1. A scraping tool comprising a member consisting of a handle and a rectangular head, said head having a transverse channel in its under face and a hole therethrough half-way between said channel and the end of the head, a blade mounted against the under face of said head, said blade having a body comprising a rectangular plate with a flange along one edge of the body extending into said channel, said flange being inclined with respect to the plane of said body and terminating in a sharp edge, said body having a second flange along the opposite edge thereof and inclined from the plane of the body in the opposite direction, said second flange terminating in a sharp edge, and fastening means through the center of said blade and through said hole releasable to permit angular adjustment of said blade limited by engagement of the flange in the channel with one or the other side of the channel.
2. A scraping tool as described in claim 1, said blade consisting of two rectangular plates of the same size permanently secured together face to face, each plate having two flanges on parallel edges thereof making obtuse dihedral angles with said plates, each said flange terminating in a sharp edge.
3. A scraping tool as described in claim 1, said fastening means comprising a bolt passing through said blade and said head, and a nut on said bolt.
4. A scraping tool as described in claim 3, said blade having a square aperture through the center thereof, said bolt having a head, a threaded shank and a squared portion adjacent to said head fitting in said square aperture.
References Cited by the Examiner UNITED STATES PATENTS WILLIAM FELDMAN, Primary Examiner.
R. V. PARKER, JR., Assistant Examiner,
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|USD779143||Apr 25, 2014||Feb 14, 2017||Unger Marketing International, Llc||Window scraper|
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|U.S. Classification||30/171, 15/236.5|
|International Classification||A47L13/08, A47L13/02|