Harvesters – Motorized harvester – Including plural operating units and drive
Reexamination Certificate
2000-02-04
2001-10-23
Pezzuto, Robert E. (Department: 3671)
Harvesters
Motorized harvester
Including plural operating units and drive
C056S295000
Reexamination Certificate
active
06305153
ABSTRACT:
CROSS-REFERENCE TO RELATED APPLICATIONS
This application is related to and claims priority, under 35 U.S.C. §119, from French Patent Application No. 99 01899, filed on Feb. 15, 1999, the entire contents of which are hereby incorporated by reference herein.
BACKGROUND OF THE INVENTION
1. Field of the Invention
The present invention relates to a cutting member of a cutting machine intended to be driven in rotation about an upwardly directed axis of revolution and including:
at least two supports each intended to carry a cutting element, and
at least two active areas each located in the region of a corresponding cutting element and each exposed, during the work, to the product previously cut by said cutting elements, each active area contributing to the conveying of said cut product.
2. Discussion of the Background
Such a cutting member with which a cutting machine (KUHN FC 250-FC 300 mower-conditioners) is fitted is known from the prior art.
This known machine includes a cutting mechanism provided with a plurality of cutting members. The cutting mechanism is moved, during the work (i.e., a cutting operation), in a direction of advance and is intended to cut a standing product down to the ground. To do this, the cutting members, arranged side by side along a line transverse to the direction of advance, are driven in rotation, during the work, about a respective upwardly directed axis of rotation. Each cutting member is formed from a stamped sheet and includes two supports, each carrying a cutting element.
Each cutting member additionally includes two active areas, wherein each of the active areas is located in the region of a corresponding cutting element and each of the active areas is exposed, during the work, to the product previously cut by the cutting elements. Each active area extends, over part of the bent sheet and of the corresponding support, and contributes to the conveying of the cut product toward the rear of the cutting mechanism. During the work, repeated contact with the cut product causes the cutting members to undergo a certain amount of wear, especially in the active areas. When the cutting members have undergone a certain degree of wear, they have to be replaced with new cutting members.
SUMMARY OF THE INVENTION
The object of the present invention is to improve these known cutting members by increasing their lifetime while seeking to obtain a simple and inexpensive solution.
To do this, the cutting member is one wherein each support includes an upper part, forming at least the corresponding active area. Such a design makes it possible to increase the lifetime of the cutting member. This is because the active area is now formed exclusively by the corresponding support, which support has characteristics from those of the rest of the cutting member.
The present invention also relates to the following characteristics, taken in isolation or in any of their technically possible combinations:
each upper part of a support includes a convex upper surface;
the cutting member includes a first part by means of which it is fastened to a shaft of longitudinal axis coincident with the axis of revolution, and a second part of elongate shape which includes, on one side, a first end near which a first support is located and, on the other side, a second end near which a second support is located;
the second part of the cutting member is of approximately oval or elliptical shape;
the second part of the cutting member includes, on one side, a first cut located at the first end and, on the other side, a second cut located at the second end, each support being housed in the corresponding cut;
each support forms to a large extent the corresponding end of the second part;
the second part includes, at each end, an upper surface which extends substantially in the continuation of the upper part of the corresponding support has, thereby making it possible to reduce the wear of the support;
each support has a thickness greater than the thickness of the second part, thereby advantageously making it possible to increase the lifetime of the cutting member;
each support includes a corresponding lower part which extends below the second part of the cutting member;
the lower part of each support includes a reinforcing lug which extends toward the first part, thereby advantageously making it possible to stiffen the cutting member;
the lower part of each support extends beyond the limits of the upper part of said support;
the lower part of each support partially follows the shape of the second part, thereby also making it possible to stiffen the cutting member;
each support forms an attached support which is fastened to the second part by welding;
each support forms an attached support which is fastened to the second part in a removable manner, thereby advantageously making it possible to replace it when it is worn;
each support includes a hole allowing the corresponding cutting element to be linked thereto.
The present invention also relates to a cutting machine, intended to be coupled to a motor vehicle, and comprising a cutting mechanism provided with at least one cutting member driven in rotation about an upwardly directed axis of revolution, the cutting member or members having one or more of the above characteristics.
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Kovacs Arpad F
Kuhn S.A.
Oblon & Spivak, McClelland, Maier & Neustadt P.C.
Pezzuto Robert E.
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