1996-10-10
1998-05-05
Melius, Terry Lee
Excavating
Digging edge
37233, E01H 504
Patent
active
057460175
DESCRIPTION:
BRIEF SUMMARY
FIELD OF THE INVENTION
The present invention relates to a ploughshare having cutting edges and securing means for attachment to a plough.
SUMMARY OF THE INVENTION
The ploughshare has been especially developed with a view to being mounted on a plough for clearing snow, slush and ice. The ploughshare will be particularly well-suited for clearing snow where road salt is used, such as is often the case in towns, and where grooves have been formed in the road surface owing to wear caused by studded tires.
The ploughshare is constructed such that it constitutes a replaceable part of a plough and the actual dismantling and mounting can take place quickly and by means of simple aids. Furthermore, the construction and material choice of the ploughshare give a very low noise level during use compared with other shares of a conventional design.
This is achieved with a ploughshare of the kind mentioned above which is characterised in that a number of single shares are firmly embedded in an elastomer mass, where, on use, each individual share is independently moveable from the underlying surface against the elasticity in the mass with a view to absorbing or adjusting itself to irregularities (wheel track wear) in the underlying surface.
It is of advantage if each individual share comprises a share plate having cutting edges of hardmetal attached thereto. The cutting edge may be bolted or welded onto the share plate. The cutting edge may be of a sintered material.
Advantageously, the share plate may be of a substantial U-shape which opens upward during use, where the opening partly encloses the securing means. The securing means themselves may comprise several metal bushes which are embedded in the elastomer mass and form a through-going bolt hole through the mass, and a metal rod which extends in the longitudinal direction of the share and has holes which correspond with the bolt holes of the bushes, and screw connections for clamping attachment of the ploughshare between the metal rod and the plough.
BRIEF DESCRIPTION OF THE DRAWINGS
Other, additional purposes, features and advantages will become clear in the following description of what is for the present a preferred embodiment of the invention, which is given for the purposes of description, without thereby being limiting, and given in connection with the attached drawings, where:
FIG. 1 is a schematic illustration in partial perspective view of a ploughshare according to the invention, where a portion has been removed to clarify details of the ploughshare;
FIG. 2 is a schematic illustration of a top view of the ploughshare according to FIG. 1; and
FIGS. 3a and 3b show respectively a section along line A--A and line B--B through the ploughshare according to FIG. 2.
DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENT
Reference is first made to FIG. 1 which shows a ploughshare 10, designed to be mounted on a plough (not shown) by means of various securing means. The ploughshare 10 is constructed of several individual shares 6. The illustrated embodiment has three such individual shares 6. The number can, of course, vary according to need for each individual application. During manufacture, the individual shares are embedded in an elastomer mass, such as rubber of a certain firmness and rigidity. The elastomer mass 3 holds the individual shares 6 in place in a stable manner. Each individual share 6 consists of a share plate 1 and a cutting edge 2, preferably of hardmetal, such as a sintered material, which are firmly secured to one another, for example, by means of screw connections or by means of a weld. At the moment the ploughshare is put to use, the cutting edge 2 penetrates the elastomer mass, thereby becoming uncovered and comes into direct contact with the snow, slush and ice which are to be removed. When in use, the ploughshare will be substantially vertical to the road surface, although a certain degree of tilting will be possible.
The ploughshare 10 includes also a number of metal bushes 4 which are embedded in the elastomer mass 3 and thus form a thr
REFERENCES:
patent: 2061585 (1936-11-01), Meyer
patent: 3477149 (1969-11-01), Wagner
patent: 4347677 (1982-09-01), Kuper
patent: 4590694 (1986-05-01), Block
patent: 5471770 (1995-12-01), Ferreira
Melius Terry Lee
Pezzuto Robert
Scana Staal AS
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