Hand puller
The hand-held puller with a notch and line ensures efficient and precise dressing of grinding wheels for saw chains, addressing inefficiencies in existing tools by maintaining geometry and preventing radius formation.
Patent Information
- Authority / Receiving Office
- DE · DE
- Patent Type
- Utility models
- Current Assignee / Owner
- Filing Date
- 2026-01-23
- Publication Date
- 2026-04-02
AI Technical Summary
Existing hand-held dressing tools for grinding wheels used in sharpening saw chains are inefficient in maintaining the wheel's geometry and become clogged with dirt, necessitating frequent dressing, and existing tools fail to prevent grinding radii during the dressing process.
A hand-held puller with a handle and grinding piece featuring a notch and a line, allowing for symmetrical V-shaped lateral edges and a detachable grinding wheel, ensuring precise alignment and preventing radius formation during dressing.
Facilitates easy and precise dressing of grinding wheels for saw chains, maintaining their geometry and preventing radius formation, thereby extending their usability and effectiveness.
Smart Images
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Abstract
Description
[0001] The invention relates to a hand-held dressing tool for dressing a grinding wheel for chains with Stihl HEXA geometry. Such hand-held dressing tools are also referred to as dressers. In particular, the invention relates to a hand-held dressing tool for grinding wheels required for sharpening saw chains.
[0002] These types of grinding wheels are typically made of aluminum oxide. A thickness of 4.5 mm is recommended. During grinding, the grinding wheel wears down, loses its geometry, and becomes clogged with dirt. Therefore, it is advisable to dress the wheel after every two chains when sharpening saw chains.
[0003] The invention is based on the objective of developing a simple hand-held puller that is particularly well suited for dressing a grinding wheel when the grinding wheel is needed for grinding saw chains.
[0004] This problem is solved with a hand-held puller according to claim 1. Advantageous further developments are the subject of the dependent claims.
[0005] The invention is based on the knowledge that no radius should be ground when dressing grinding wheels for saw chains. The lateral edges of the grinding wheel should converge in a V-shape. The lateral edges should run symmetrically to the wheel.
[0006] The hand squeegee according to the invention is characterized in that it has a handle and a grinding piece, wherein the grinding piece has a notch with a notch base and a line runs from the notch base over the grinding piece and the handle.
[0007] The special notch makes grinding easier, and the line makes it easier to keep the hand scraper in the correct alignment with the grinding wheel.
[0008] The notch of the hand puller preferably has a notch angle between 110° and 130°, which is particularly preferably around 120°.
[0009] The grinding piece preferably has grinding surfaces on either side of the notch base. These are preferably rectangular.
[0010] To enable the grinding wheel to be detached from the handle, the grinding wheel is inserted into the handle. Therefore, it is proposed that the grinding wheel be detachable from the handle. For this purpose, it is advantageous if the handle has a U-shaped recess for the grinding wheel.
[0011] The handle can have a hole, and the hole can intersect the line.
[0012] It is particularly advantageous if the handle has a rectangular cross-section and the line runs on the wider side and the notch runs perpendicular to the wider side.
[0013] When using the hand-held dressing tool, the grinding motor is moved to the upper position and switched on manually. To avoid grinding a radius when dressing grinding wheels for saw chains, the hand-held dressing tool is carefully guided against the grinding wheel from below. This creates two flanks on the grinding wheel, the contour of which is defined by the hand-held dressing tool. For this to work, the hand-held dressing tool must be positioned parallel to the grinding wheel. This is facilitated by the line, which in this example is formed as a groove.
[0014] The hand-held scraper can also be used for a depth gauge disc. In its standard configuration, this disc has a rather rectangular grinding edge with a U-shaped cross-section. The leg of the scraper is parallel to the disc, while the base is perpendicular to it. Using the hand-held scraper, the base can be ground so that it runs at an obtuse angle to the leg. This obtuse angle can be, for example, 120°, and is therefore very easy to grind with the hand-held scraper.
[0015] An exemplary embodiment is shown in the drawing. It shows Fig. 1. A view of the grinding surfaces of the grinding piece, Fig. 2 a side view of the hand squeegee, Fig. 3 an excerpt from the Fig. 1, Fig. 4 the interaction of hand puller and grinding wheel and Fig. 5 the angle in the notch.
[0016] The one in Fig.The hand-held puller 1 shown for grinding wheels 2, with a handle 3 and a grinding piece 4, has a notch 5 with a notch base 6. A line 7 runs from the notch base 6 over the grinding piece 4 and the handle 3.
[0017] The notch 5 has a notch angle 8 of approximately 120°. Grinding surfaces 9, 10 are located laterally to the bottom of the notch 6.
[0018] The grinding piece 4 is detachably inserted into the handle 3. For this purpose, the handle 3 has a U-shaped receptacle 11 for the grinding piece 4.
[0019] On the side opposite the grinding piece 4, the handle 3 has a bore 12. The line 7 runs from the notch base 6 along the handle 3 to the bore 12.
[0020] Handling is made easier by the fact that the handle 3 has a rectangular cross-section, the line 7 runs on the wider side 13 and the notch 5 runs at right angles to the wider side 13.
Claims
[1] Hand dressing tool (1) for dressing a grinding wheel (2) with a handle (3) and a grinding piece (4), characterized by , that the grinding piece (4) has a notch (5) with a notch base (6) and a line (7) runs from the notch base (6) over the grinding piece (4) and the handle (3). [2] Hand puller according to claim 1, characterized by , that the notch (5) has a notch angle (8) between 110° and 130°. [3] Hand puller according to claim 1, characterized by , that the notch angle (8) is approximately 120°. [4] Hand puller according to any one of the preceding claims, characterized by , that grinding surfaces (9, 10) are arranged laterally to the notch base (6). [5] Hand puller according to claim 4, characterized by , that the grinding surfaces (9, 10) are rectangular. [6] Hand puller according to any one of the preceding claims, characterized by , that the grinding piece (4) is inserted into the handle (3). [7] Hand puller according to any one of the preceding claims, characterized by , that the grinding piece (4) is detachable from the handle (3). [8] Hand puller according to any of the preceding claims, characterized by , that the handle (3) has a u-shaped receptacle (11) for the grinding piece (4). [9] Hand puller according to any one of the preceding claims, characterized by , that the handle (3) has a bore (12). [10] Hand puller according to claim 9, characterized by , that the bore (12) intersects the line (7). [11] Hand puller according to any of the preceding claims, characterized by , that the handle (3) has a rectangular cross-section, the line (7) runs on the wider side (13) and the notch (5) runs perpendicular to the wider side (13).