DE1208110B - End blade for measuring knife - Google Patents

Description

FEDERAL REPUBLIC OF GERMANY

GERMAN

PATENT OFFICE

EDITORIAL

Int. α .:

AOId

German class: 45 c - 55/04

Number: 1208110

File number: J 20578 HI / 45 c

Filing date: September 25, 1961

Opening day: December 30, 1965

The invention relates to cutter bars with a reciprocating knife, in which a mower knife is over a finger bar works and where the outer end of the mower blade is over the outer shoe reaches out, and has set itself the task of creating a new end blade for mowing knives.

With mowers of this type, if the crops are lush or the crops are lying flat, that the end of the knife, which works through an associated slot in the outer shoe, material into the Slit into it without cutting it, thereby causing clogging. In this way can either be a breakage of the cutter bar or because the knife blade cannot pass through the slot bending and breaking of the knife blade and / or the knife back can occur. Multi-part, Blades arranged on the outer cutter bar end are known, e.g. as a two-part knife blade executed, consist of a wide and a narrow tooth. The height of the teeth is in each case same. The purpose sought with such double knives is to clog the outer finger to avoid, which incidentally is hardly achieved with known arrangements of this kind should be. It is the object of the invention to achieve an improvement in this regard.

With an end blade for mowing knives with several teeth of different widths this task becomes achieved in that the preferably three-toothed end blade has an inner tooth of normal height, a middle tooth of about three quarters normal height and an outer tooth of about half normal height owns. Such a new end blade is relatively inexpensive to manufacture, although it can be advantageous that their cutting edge is almost one and a half times as long as that of conventional blades.

The new end blade according to the invention will be far better than this with previous designs was possible, clogging was prevented and a progressive cut was achieved, thus reducing the burden of the knife is reduced. In addition, the new end blade allows for uninterrupted mowing and leaving behind thus the field is clean and free of chopped up or uncut material.

Further details of the invention can be found in the following description and in the drawings remove.

F i g. Figure 1 is a top plan view of part of a mower deck with the end blade at its outermost Position;

F i g. Figure 2 is a plan view similar to Figure 2. 1 with the end blade in the middle position;

End blade for mower knife

Applicant:

International Harvester Company,

Chicago, JIl. (V. St. A.)

Representative:

Dipl.-Ing. H. Zoepke, patent attorney,

Munich 5, Erhardtstr. 11

Named as inventor:
John J. Kowalik, Glenview, JIL;
Joseph Syrutowicz, Chicago, JIL;
Robert A. Johnson,
Downers Grove, JIL (V. St. A.)

Claimed priority:
V. St. ν. America September 30, 1960
(59 697)

F i g. 3 is a plan view similar to FIG. 1 and 2 with the end blade in its innermost position;

F i g. Figure 4 is a top plan view of the new end blade.

A mower, generally designated 2, consists of a cutter bar 3, the forward facing Finger 4 and the outer shoe 5 wears.

Each finger 4 has a finger plate 6 which works together with the points 7 of the usual knife blade 8, which is preferably riveted at 9 to the knife back 10, which is in a groove 11 of the cutter bar 3 is performed. The whole knife is held against the cutter bar 3 by a number of knife holders 12 held.

In the case of the usual knife blades 8, adjacent side edges 14 abut at an angle of approximately 60 ° together. For example, the length of a normal blade can be 3 inches.

The distances between the fingers 4 and between the last finger and the outer shoe 5 are all same.

The outer shoe 5 has a horizontal slot 16 which runs in one direction through the floor surface 17 is limited, which lies parallel to the underside of the knife and carries a cleat 18, which at is riveted to the bottom 21 of the shoe 5. the

509 760/95

Inner edge 22 of the cleat 18 protrudes beyond the inner edge 23 of the outer shoe 5 and works with the new end blade 25 together.

The end blade 25 has a fastening section 26 with an essentially straight contact edge 27 which slides along the edge of the groove 11 of the cutter bar 3. The blade 25 is essentially a flat plate the thickness of the rest of the blades and has an inner tooth 28, a central tooth 29 and an outer tooth 30. The inner tooth 28 is of normal height, e.g. 3.22 inches, which is the central tooth e.g. 2.5 inches and the outer tooth e.g. 1.69 inches high as measured from edge 27. The inner and outer edges 32 and 33 of the inner tooth 28 are bevel ground and the edge 32 forms an angle of approximately 55 ° with the adjacent edge 34 of the next normal blade. The edge 34 has an angle of approximately 30 ° to the line XX in FIG. 1, which runs perpendicular to the longitudinal direction YY of the cutter bar, and the edge 32 forms an angle of about 25 °. The outer edge 33 of the inner tooth 28 forms an angle of approximately 45 ° with the inner edge 36 of the central tooth 29, and likewise the outer edge 37 of the central tooth 29 forms an angle of approximately with the inner edge 38 of the outer tooth 30 45 °. The outer edge 39 of the outer tooth 30 forms with the parallel to the line XX in FIG. 1 an angle of 22.5 °, for example.

In this way, the end blade gets a length of, for example, 3.75 inches, while the normal For example, blade is only 3 inches long. The center-to-center distance of the finger plates 18 and the neighboring ones However, finger plate 40 is only 2.8125 inches, for example.

The cutting edge length in the end blade according to the invention is, for example, 7.25 inches compared to for example 5 inches for the normal blade. In addition, from the outside to the inside there is more increasing tooth height, more material is cut as there is between the outer shoe 5 and each Cutting edge approaching the finger plate can accumulate new material.

The embodiment represents a preferred embodiment of the invention. But it is not restricted to this example, but leaves various possibilities within the scope of the claims to.

Claims (6)

Patent claims: 1. End blade for mowing knives with several teeth of different widths, characterized in that that the three-tooth end blade has an inner tooth (28) of normal height, a central tooth (29) of about three quarters Normal height and an outer tooth (30) of approximately half normal height. 2. End blade for mowing knife according to claim 1, characterized in that it has a larger one Longer than the other blades. 3. End blade for mowing knife according to claim 1, characterized in that its inner tooth (28) has a smaller center-to-center distance from tooth (13) of the neighboring blade than the teeth (13) the usual blades among each other. 4. end blade for mowing knife according to claim 2, characterized in that the center distances between their teeth from the inner end to the outer end of the blade. 5. End blade for mowing knife according to claims 1 to 3, characterized in that their teeth have cutting edges (32,33, 36, 37,38, 39) which each form an angle with one another of about 45 °. 6. End blade for mowing knife according to one of claims 1 to 5, characterized in that the stepped cutting edge is about one and a half times as long as that of the other blades. Considered publications:
U.S. Patent No. 2,909,886. 1 sheet of drawings 509 760/95 12.65 © Bundesdruckerei Berlin