MXPA98003185A - Sale repair tool - Google Patents

Abstract

The present invention relates to a hand tool comprising: (a) an angular handle having front and rear sections, the front and rear sections of the handle are attached at an angle of about 95 degrees to 125 degrees; (b) a blade circular mounted rotationally at the front end of the handle, the blade is mounted almost perpendicular to the axis of the front section of the handle, at the center of the blade is lowered from the edges of the blade by at least about 1.59 millimeters, and (c) a guard of hand for the back section of the handle that extends at least towards the interior of the angle formed by the front and rear sections of the handle

Description

"WINDOW REPAIR TOOL" BACKGROUND OF THE INVENTION In the manufacture and repair of windows, the removal of glass from the frame has been a tedious and delayed task for a long time. Cutting through the seat material in order to remove the glass, particularly with manufactured window units that are completely glass, is so delayed that, when a sheet of glass is damaged in these constructions, it is often cheaper to discard all the manufactured window unit that replace the glass. Accordingly, there is a continuing need for a tool to efficiently remove glass from the window units.

COMPENDIUM OF THE INVENTION The present invention provides an improved hand tool that can be used to cut through the seat material and allow the removal of the glass from the window units with glass in a fraction of time previously required.

Specifically, the present invention provides a hand tool comprising: (a) an angular handle having front and rear sections, the front and rear sections of the handle are attached at an angle of approximately 95 degrees to 125 degrees; (b) a circular blade rotatably mounted on the front end of the handle, the blade is mounted essentially perpendicular to the axis of the front section of the handle, the center of the blade is recessed from the edges of the blade by at least about 1.59 millimeters; and (c) a hand guard for the back section of the handle extending at least inwardly of the angle formed by the front and rear sections of the handle.

BRIEF DESCRIPTION OF THE DRAWINGS Figure 1 is a perspective view of a manual tool of the invention. Figure 2 is a longitudinal cross-sectional view of a hand tool of the invention. Figure 3 is a top elevation view of a hand tool of the invention.

Figure 4 is a fragmentary side view of a hand tool of the invention. Figure 5 is an enlarged cross-sectional view of a circular blade that can be used in the present invention. Figure 6 is an illustration of the tool during its operation.

DETAILED DESCRIPTION OF THE INVENTION The hand tool of the present invention comprises three basic components, these being an angular handle, a circular blade and a hand guard. They are illustrated in the drawings, wherein Figure 1 is a perspective view of a hand tool of the invention. There, the angular handle 1 has a front section 2 and a rear section 3, the front and rear sections of the handle are attached at an angle "a" that is approximately 95 degrees to 125 degrees. Generally, angles outside this scale have been found to provide unsatisfactory performance, from the point of view of mechanical efficiency, caulking removal or comfort for the user. The handle can be prepared from any suitable material. An aluminum rod material has been found to be particularly convenient and satisfactory, for example, one having from about 1.27 centimeters to 2.54 centimeters. As shown in the cross-sectional view illustrated in Figure 2, the handle can be made narrower, for example by machine styling to accommodate the installation of a handle 4. The handle can be manufactured from a wide variety of materials of which the wood and the molded thermoplastic resin have been found to be particularly satisfactory. The circular blade 5 is mounted rotatably on the front end of the handle, the blade being mounted essentially perpendicular to the axis of the front section of the handle. The means for mounting can vary widely, as will be apparent to those skilled in the art. As shown here, the blade can be fixed to the arrow 6, which is mounted rotatably on the bearing 7. The bearing, in turn, is mounted within a recess formed in the front end of the handle, essentially parallel to the axis of the handle. As can be seen in Figures 2 and 5, the center 5A of the blade is recessed from the edges of the blade by at least about 1.59 millimeters, to avoid scratching the glass where the tool is used. The specific materials used for the circular blade are not critical to the present invention and may be those normally used in the manufacture of the blade including, for example, ferrous alloys. Spring steel has been found to be particularly satisfactory, and is correspondingly preferred. The circumferential edge of the blade 5B is usually sharpened to an angle of less than about 20 degrees. The blade, during use, is largely self-grinding type, since the continuous abrasion of the blade in the glass combined with the generally concave configuration of the blade, maintains a knife edge. The handle is equipped with a hand guard 8, preferably in an arched configuration, for the back section of the handle. The protector extends at least towards the interior of the angle formed by the front and rear sections of the handle. The protector protects the user's hand from possible cuts of glass on the surface of the window. The protector can conveniently be manufactured from a variety of laminated materials of which high density polyethylenes, acrylics and polycarbonates have been found to be particularly satisfactory. The sheet material can be configured at room temperature or at elevated temperature, depending on the specific material used. The components of the handle are held together by an appropriate clamping means 9. The present invention can be used for the removal of a wide variety of caulks, glass and seat compounds including, for example, silicone caulking, closed cell foam tape, urethanes, thermoplastics and those made of butyl compounds. Figure 6 shows the use of a tool in a window comprising a frame 10, glass 11 and caulking 12. During operation, the circular blade is usually first used flat to cut along the caulking edge adjacent to the glass, as illustrated in Figure 6, and then, if necessary, reversed to make a second cut at an angle, after which the glass can be easily removed. In addition, the tool can be used effectively to remove perimeter caulking around window frames.

Claims (7)

CLAIMS;

1. A hand tool comprising: (a) an angular handle having front and rear sections, the front and rear sections of the handle are attached at an angle of approximately 95 degrees to 125 degrees; (b) a circular blade mounted rotatably on the front end of the handle, the blade is mounted almost perpendicular to the axis of the front section of the handle, the center of the blade is recessed from the edges of the blade by at least about 1.59 mm; and (c) a hand guard for the back section of the handle extending at least inwardly of the angle formed by the front and rear sections of the handle.

2. A hand tool according to claim 1, wherein the front and rear sections of the handle are joined at an angle of approximately 100 degrees to 110 degrees.

3. A hand tool according to claim 1, wherein the circular blade has a diameter of about 5.08 to 10.16 centimeters.

4. A hand tool according to claim 3 wherein the circular blade has a diameter of about 6.35 centimeters.

5. A hand tool according to claim 1, wherein the circular blade has a thickness of about .635 to 3.175 millimeters.

6. A hand tool according to claim 5, wherein the circular blade is made of spring steel.

7. A hand tool according to claim 1, wherein the circular blade has a circular knife edge having an angle of less than 20 degrees.