Cutting – Tool or tool with support – Toothed blade or tooth therefor
Patent
1998-09-21
2000-10-24
Rachuba, M.
Cutting
Tool or tool with support
Toothed blade or tooth therefor
83846, 83854, 83855, B23D 5700, B27B 1302
Patent
active
061350044
DESCRIPTION:
BRIEF SUMMARY
TECHNICAL FIELD
The present invention relates to a saw blade, and in particular to a saw blade of the type used for applications in which two saw blades are arranged adjacently located with an opposed rotary direction in relation to each other.
BACKGROUND ART
A pair of saw blades for use as above are previously known from SE-B 458 096, each saw blade having the saw teeth set only in a direction away from an adjacent saw blade. It is also stated as an alternative that the saw teeth can be arranged with cutting members of carbide material or similar material, having a width extension exceeding the width of a supporting saw tooth, and extending away from the side surface which is located adjacent to a co-acting saw blade. Such a cutting member should be arranged in a conventional way, i.e. having an angle of clearance by the outer side portion. This is also clearly stated in the specification of said patent, in which it is stated that "such an embodiment gives the advantages otherwise obtained by setting of saw teeth".
The above described pair of saw blades, which in this connection must be regarded as defining the state of art, involve a major step forward when sawing compared to prior art with only one single saw blade, but results in a cut surface having conventional surface structure, i.e. with curved visible marks corresponding to the radius of the saw blade. The saw cuts also normally require a later burr removing operation, a costly operation which obviously, if possible, should be avoided.
The object of the present invention is to disclose an improved saw blade of the above stated type, i.e. of the type used as a pair in adjacent position to each other and having an opposed rotary relationship to each other, which removes the above stated disadvantages. With the saw blade according to the present invention a saw cut of highest quality is thus achieved without visible curved machining marks, and formation of burrs by the cut surface is also avoided, hence also removing the need for a later deburring operation.
DISCLOSURE OF INVENTION
The saw blade according to the present invention is intended to be used for applications in which two saw blades are arranged in an adjacent relationship having in relation to each other opposed rotary directions, and with a first side portion of each saw tooth arranged extending substantially parallel to a first side plane of the saw blade, in use intended to be located adjacent to a similarly shaped co-acting saw blade, and it is mainly characterized in that said first side portion of the saw teeth have an extension more closely to the central portion of the saw blade in relation to the first side plane, separated from said side plane by a smaller distance. As a further characteristic feature can be stated, that the outer edge portion of each saw tooth by a second side plane of the saw blade includes a peripherally initially substantially straight part, located outside the second side plane and in a substantially parallel relationship thereto, and which is transformed into a direction towards the second side plane inclined part, arranged to form an angle of clearance.
BRIEF DESCRIPTION OF DRAWINGS
Examples of embodiments of a saw blade according to the present invention will now be more fully described with reference to the accompanying drawings, in which:
FIG. 1 is a side view of a saw blade according to the present invention;
FIG. 2 is a view I--I in cross-section and enlarged scale of the saw blade shown in FIG. 1;
FIG. 3 shows two saw blades according to the invention during a sawing operation; and
FIG. 4 shows a radial outer portion of a saw blade, intended to illustrate an example of a further modification of a saw blade according to the invention.
MODES FOR CARRYING OUT THE INVENTION
With reference to FIGS. 1 and 2, a saw blade is shown, as a complete unit denominated 1, the peripheral part having saw teeth, arranged according to FIG. 2.
As disclosed in FIG. 2, the saw blade 1 according to the invention, in difference to previously known saw blades, i
REFERENCES:
patent: 2555428 (1951-05-01), Tuttle
patent: 3111970 (1963-11-01), Priest et al.
patent: 3309756 (1967-03-01), Segal
patent: 3576061 (1971-04-01), Pahlitzsch
patent: 3818561 (1974-06-01), Montana et al.
patent: 3924318 (1975-12-01), Baker
patent: 4011783 (1977-03-01), Mobley
patent: 4137808 (1979-02-01), Mattes
patent: 4173914 (1979-11-01), Vollmer et al.
patent: 4604933 (1986-08-01), Lesher et al.
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