MXPA96005523A

MXPA96005523A - Handle for l

Info

Publication number: MXPA96005523A
Application number: MXPA/A/1996/005523A
Authority: MX
Inventors: Einvali Joacim
Original assignee: Sandvik Ab
Priority date: 1995-12-07
Filing date: 1996-11-12
Publication date: 1997-08-01

Abstract

The present invention relates to handle for a line of polygonal cross section, this handle has a non-circular hole to receive the file, the hole forms at least three corners, with surfaces extending between each adjacent pair of corners, each of the surfaces includes a generally concave segment and a generally convex segment, the generally concave segment includes one end with a large radius at the end of a short radius, the large radius end is spaced beyond the central axis of the orifice of which is the end of the radius. radio cor

Description

MANGO FOR LIMA Description Background The files for sharpening cutting tools are provided with handles in order not to damage or force the user's hand. Usually the handle is made with a hole in one end and is held by the file pressing on a smooth conical rabera of the file, which deforms the walls of the building. Often the handle is also made to prevent the hand from touching the edge of the tool. Certain types of files such as files for small needles are made with a non-conical cylindrical rabera and held with a handle comprising movable jaws, which grip the rabera like a bit holder. Similar handles are also used for chain saw files, although none of these have holes through. To sharpen blinding, sickles, brush blades and machetes, heavy duty files with a polygonal cross section, usually triangular or square, are used. The invention relates to a handle for use with these files, which allows it to be made without a smooth rabera and which is possible to manufacture them so that they have only a limited portion of the active part of the file at a time.

The invention The drawings: Figure 1 shows a side view of a handle made in accordance with the present invention; and Figure 2 is an axial view of Figure 1. The handle is made of a piece of a synthetic polymer and comprises a grip part 11 with a surface structure form suitable for its stable pressure by hand. The front end of the handle is flared to form a finger guard 12 preventing the hand from sliding forward towards the sharp edge of the tool. File 13 has a polygonal section without conicity, at least over most of its length. The cuts of the file are such that the edge is sharpened by pushing it forward and as the teeth of the file are in joint from the middle section towards both ends, the file is reversible. Preferably the file has a single cut at an angle such that filing can also be done by moving the file to the sides. The file is inserted in a through hole 14 that crosses the entire length of the handle and is open at both ends. If only a short section of the file is to be used, the excess length of the file can be extended from the rear opening. The cross section of the hole is such that the file can be easily inserted and secured in place subsequently by rotating the handle relative to the file.

The orifice cross section 14 has as many corners outward as the section of the file 14, although at slightly larger distances. Between the outward corners, the surface of the orifice comprises a concave surface 16 and a convex surface 17, wherein the convex surface may comprise an inward corner and a flat surface portion. The shape of the concave surface 16 will be such that its radial distance from the center line 18 of the handle is larger at its outward corner and smaller where it meets the convex surface. When the handle is rotated around the file, it will reach a position where all the corners of the file are pressed against the concave surface 16 of the hole so strong that the file is rigidly held by the frictional forces. In order to ensure sufficient friction, the corners 15 of the hole section will be just a little more apart than the corners of the file. An appropriate shape for the concave part of the orifice section is a spiral with a constant angle in relation to radius to center 18. The concave surface may also be structured with narrow grooves or other patterns that improve friction. The file loosens easily from the handle by turning it in the opposite direction.

Claims

R E I V I N D I C A C I O N S

1. - Support for non-conical files with polygonal section, comprising a polymer handle with a hole for insertion of the file, characterized in that the hole extends through the entire length of the handle and is open at both ends and in that the The section of the hole has as many corners outward as the section of the file and in which the surface of the hole between each two corners comprises a concave portion and a convex portion.

2. Support according to clause 1, characterized in that the convex surface portion comprises. a corner inwards.

3. Support according to clause 1, characterized in that the convex surface portion comprises an inward corner and a flat surface portion.

4. Support according to clause 1, characterized in that the distance is radial from points in the concave surface portion to the center line of the hole is larger for points in an outward corner and smaller for points close to the portion of convex surface.

5. Support according to clause 4, characterized in that the section of the concave portion is a spiral curve.

6. Support according to clause 1, characterized in that it has three corners outwards. RES UM EN Support for non-conical files with polygonal cross section, comprising a polymer handle with a through hole 14 open at both ends where the section of the hole has as many corners 15 outwards as the section of the file, preferably three or four and wherein the surface of the hole between each two corners comprises a concave surface portion 16 and a convex surface portion 17 and wherein the convex surface portion may comprise an inward corner