US2715770A - Scraping tool - Google Patents

Description

3, 1955 R. E. MEYER 2,715,770

' SCRAPING TOOL Filed May 1, 1953 INVENTOR. r @mM/w 5%)??? United States Patent SCRAPING TOOL Raymond E. Meyer, South St. Paui, Minn.

Application May 1, 1953, Serial No. 352,475

2 Claims. (Cl. 30-336) This invention relates to the art of removing a layer or film from a rigid surface, e. g., removing paint from a painted surface or ice from a sheet of glass, etc. The invention provides a simple and highly efficient tool for such purposes.

Many different kinds of scraping tools have heretofore been widely used, but all of such scrapers with which I am acquainted, have had one or more defects which made them unsuitable for the purpose for which they were intended. In many of such tools, wherein a removable blade was provided, it was difiicult, and inconvenient, to open the scraper so that a new cutting blade could be inserted. In other types of scrapers, which were not provided with a removable blade, the permanent blade was so heavy that it would frequently mar the surface upon which it was being used.

A further disadvantage in certain prior art scrapers employing a razor blade, was that the user of the scraper frequently cut himself in attempting to insert the razor blade in or remove it from the holding element.

It is an object of the present invention to provide a razor blade type of scraping tool, in which the razor blade will be sufiiciently rigidly held so that the tool will be adequate for heavy scraping operations, yet wherein the blade holding mechanism may be very quickly and easily released for change of the blade when said blade becomes dulled through use. In the case of painters, particularly, it is especially desirable to have a scraping tool from which the blade can be removed with the use of only one hand, for painters frequently have occasion to change the blade in the scrapers when they are working upon a .1

ladder, and their safety is imperiled if they must use both hands to change the blade. The scraper of the present invention has this advantage.

A further advantage of the present scraper is that it can be easily manufactured, in large quantities, by use of conventional machinery. It also employs a standard type razor blade as its cutting edge.

Other objects and advantages will be apparent from the drawings and the following detailed description.

Referring now to the drawings:

Figure l is a plan view of the scraper.

Figure 2 is a side view.

Figure 3 is an enlarged vertical cross-section taken along the line 33 of Figure 1.

Figure 4 is a cross-sectional view of the scraping end of my device along the line 44 of Figure 1.

Figure 5 is a cross-sectional view, particularly showing the spring retracted catch mechanism, taken along line 55 of Figure 1.

Figure 6 is a cross-sectional view of the hinged connection between the two jaws of my device, taken along the line 66 of Figure 1.

The scraper of this invention comprises, first, a top member 3, continuous along the entire length of the scraper, and having a narrow end portion 4 and a relatively wider end portion 5. Said latter end portion 5, which terminates in a scraping edge, forms the working 2,715,770 Patented Aug. 23, 19 55 'ice end of the tool. Bottom member 6 is aflixed to the underside of said narrow end portion 4 (by soldering or otherwise) and the two opposed elements 4 and 6 form the handle of the scraper. The peripheral edges of end portion 4 and bottom member 6 are provided with flanges 7 and 8 (see Figure 2) which serve to space said elements 4 and 6 apart, so that there will be room within the handle of the scraper for location of spring 9 and hook 10, the function of which will be hereinafter described.

The wider end portion 5 of top member 3 forms the upper jaw in the razor blade holding mechanism of the scraper. The lower jaw thereof is formed by element 11 which is hingedly afiixed to top member 3 by pin 12 passing through ears 13 and 14 on top member 3 and element 11, respectively: see Figure 6. By means of this arrangement, element 11 may be spread apart from the wider end of member 3, for insertion or removal of blade 15. The top surface of lower jaw 11 is provided with two forwardly facing hooks 16 and 17. Said hooks are spaced apart to register with the slots 18 and 19 in a standard Gillette type razor blade 15. Said hooks 16 and 17 are, of course, also located upon jaw 11 in such position that blade will be centered properly with its cutting edge 20 projecting slightly beyond the tip of the scraper when said blade 15 is dropped over said hooks. The wider end portion 5 of top member 3 is provided with two slots 21 and 22 through which hooks 16 and 17 will pass when jaw 11 is advanced toward portion 5. Thus, blade 15 will be held rigidly between upper jaw 5 and lower jaw 11, when those elements are brought face to face. Said hooks 16 and 17 fit snugly within said slots in said razor blade, and serve thus to hold the blade against being deflected out of cutting position when the scraper is being used. 7

laws 5 and 11 are maintained in gripping relation by the catch mechanism hereinafter described: spring 9, previously referred to, extends longitudinally of the handle of the scraper. The rear end of this spring is attached to hook 10, soldered or otherwise afiixed to the under surface of member 3. The forward end of said spring is provided with extension member 23, terminating in hook 24. Top member 3, at a point overlying hook 24, is provided with a longitudinally extending slot 25, and slidable lock means 26 is mounted over said slot. Ear 27, provided with aperture 28, is struck inwardly from said lock means and said ear passes through slot 25. Hook 24 is inserted through aperture 28 in ear 27. Said slot is somewhat longer than ear 27, so that said ear (and lock means 26) may be moved forward and backward along the length of the scraper.

Edge portions 29 and 30 of lock means 26 are turned downwardly and are provided with opposed inclined slots 31 and 32. Pin 33 is inserted through said slots and is free to slide forwardly and backwardly therein. Bosses 34 are fixed on this pin so that it cannot slide out of said slots sidewise. The end portions of said pin 33 project outwardly beyond side portions 29 and 30 of the lock means and when said lock means is moved forwardly, the end portions of the pin will ride up over the inclined trailing edges of hooks 16 and 17 and thence drop down to be engaged by said hooks. Spring 9, which is of a length so as to retract lock means 26 when it is as far forward as hooks 16 and 17, will then draw the catch mechanism rearwardly of the scraper, whereupon pin 33 will be moved forwardly in slots 31 and 32, and the inclined lower edges of said slots will force said pin upwardly to wedge the same under hooks 16 and 17. Lock means 26 is provided with knurled thumb release 35. When it is desired to open the jaws of the scraper, for removal of the blade, said release 35 may be manipulated downwardly and forward, to extend spring 9, whereupon pin 33 will be disengaged from hooks 16 and 17,

and lower jaw 11 (with the blade mounted thereon) will drop downwardly. V a 7 It will be apparent that the specific construction above described couldbe modified in numerous ways within the scope of my invention, and I do not intend to be limited by. the recitation of any particular elements, or many other way, except as defined in the claims appended hereto.

- Whatlcclaimcis:

1. A scraping'tool, having a handle end portion and a scraping end portion, said scraping end portion comprising a pair of opposed jaws hingedly connected for movement relative to each other and adapted to hold a scraping blade therebetween, one of said jaws being pro- ,videdwith a plurality of apertures, the other of said jaws being provided with a plurality of hooks aligned with and 7 adapted to pass through said apertures, the outer surface of said apertured jaw having a longitudinally slidable lock means mountedupon it, sa.id lock means having a two side edge portions, each of said side edge portions being provided with an inclined slot, said slots being parallel'and opposed, said lock means carrying a pin adapted to engage said hooks, and a spring adapted to retract said lock means toward the handle end portion wardly facing hooks aligned with and adapted to pass through said apertures, said jaws being adapted to hold a scraping blade, the outer surface of said apertured jaw having lock means mounted upon it, said lock means cooperating with said hooks to maintain said jaws in closed blade-gripping position; said lock means having.

two side edge portions extending longitudinally of said jaws and projecting upwardly therefrom, each of said side edge portions of said lock means being provided,

with a slot, the plane of said slots inclining upwardly away from said jaws as said slots extend forwardly of said side edges toward the scraping end of the tool, said slots being parallel and opposed, and a pin extending transversely of said lock means from one slot to the other, each end of said pin riding freely in a slot for free movement of said pin backwardly and forwardly in said slots, said lock means being longitudinally slidable along and partially raisable from said apertured jaw to permit placement of said pin either forwardly of said hooks,

toward the scraping end of the tool, or rearwardly of said 7 hooks; toward the handle end of the tool, and a spring element retracting said lock means toward the handle end of the tool, said pin being caused by said spring element to bear against said hooks when said pin is placed forwardly of said hooks, the lower edge of each of said slots then bearingupwardly against said pin to wedge said pin under said hooks, for maintaining said jaws in locked blade-gripping position, said jaws being separable for removal ofcsaid scraping blade when said pin is disengaged from said hooks.

References Cited in the file of this patent 1 UNITED STATES PATENTS 1,743,607 Johnson Jan. 14, 1930

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