Circular saw-blade with set and raker teeth
OwnerHans-Jurgen Gittel, Dominique Fendeleur +1inventors
InventorsHans-Jurgen Gittel, Dominique Fendeleur, Gerhart Heusinkveld
Life of this patent
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Abstract
Disposed at the rim of a circular saw-blade (7) for parting wood, wood-based materials, plastics and non-ferrous metals are groups (4) of saw teeth, each group (4) comprising at least two set teeth in the form of staggered teeth (2,3), whereby the more remote radial end of at least two of the staggered teeth is provided with a bevel (9). Each group (4) of teeth comprises, in addition, one raker tooth (1) having a symmetrical cross-section.
Claims17
A circular saw-blade (7) for parting wood, wood-based materials, plastics and non-ferrous metals at the rim of which groups (4) of saw teeth are disposed, each group comprising at least two set teeth in the form of staggered teeth (2,3), whereby the more remote radial end of the leading cutting edge (8) of at least two of said staggered teeth (2,3) is provided with a bevel wherein each group of teeth (4) comprises one raker tooth (1) having a symmetrical cross-section.
The circular saw-blade (7) as set forth in any of the preceding claims wherein said raker tooth (1) is disposed at the start of each group (4) of teeth as viewed in the direction of cutting.
The circular saw-blade (7) as set forth in any of the preceding claims wherein said set teeth (2,3) comprise an axial angle (y)
The circular saw-blade (7) as set forth in any of the preceding claims wherein the bevel angle (β) of said set teeth (2,3) is in the range 10° to 60°.
The circular saw-blade (7) as set forth in any of the preceding claims wherein the bevel width (f) of said set teeth (2,3) is in the range 5 to 40% of the tooth width.
The circular saw-blade (7) as set forth in any of the preceding claims wherein said set teeth (2,3) and/or said raker tooth (1) comprise a hollow-ground front.
The circular saw-blade (7) as set forth in any of the preceding claims wherein each group (4) of teeth is separated from the other by a chip space (5) taking up a greater portion of the rim of said saw-blade (7) than the gullet (6) between two individual teeth (1,2,3) of a group (4).
The circular saw-blade (7) as set forth in any of the preceding claims wherein said raker tooth (1) is a flat, trapezoidal, hollow-ground or roof-type tooth.
The circular saw-blade (7) as set forth in any of the preceding claims wherein said set teeth (2,3) are roughly 0.2 to 2 mm wider than said raker tooth (1).
The circular saw-blade (7) as set forth in any of the preceding claims wherein the points of said set teeth (2,3) have the shape of an isosceles triangle in the projection.
The circular saw-blade (7) as set forth in any of the preceding claims wherein said raker tooth (1) is roughly 0.2 to 2 mm lower than said set teeth (2,3).
Dependencies are inferred from the claim text.