Excavating – Digging edge – Distinct wear element mounted between teeth
Patent
1992-04-16
1993-11-16
Reese, Randolph A.
Excavating
Digging edge
Distinct wear element mounted between teeth
1727725, 37460, E02F 928, E02F 3815
Patent
active
052611701
DESCRIPTION:
BRIEF SUMMARY
BACKGROUND OF THE INVENTION
This invention relates to wear strips, more particularly for use on material handling equipment, such as chutes, plough blades, scrapers and gates, where abrasion is a severe problem, such as when handling sand, clay, glass, coal, iron ore and other minerals.
It is known to provide wear strips of hard-faced mild steel, but these tend to wear away very rapidly when the hard-facing has worn away.
It is also known (see WO/12146) to provide wear strips of rubber of rectangular or square cross-section with wear resistant tiles bonded thereto and extending across one face from and along at least one edge of each wear strip, the tiles being formed of tungsten carbide or other "hard metal" or ceramic material and being spaced from each other along the wear strip so as to allow some flexing to suit the curvature of say a chute or plough blade. In order to secure these wear strips to material handling equipment it is necessary to provide metal-sleeved holes for bolts or embed the heads of bolts in the rubber, but--in either case--the accuracy of positioning of the wear strips depends upon the accuracy of the positions of corresponding holes in the equipment. Also, the provision of numerous holes is an unpopular time consuming task, and any damage to the bolts in use can make replacement of worn wear strips a time consuming task.
On the other hand, the rubber is relatively easy to cut when a less than standard length of wear strip is required, it is wear resistant in its own right, and it offers a degree of shock resistance.
SUMMARY OF THE INVENTION
The object of the present invention is to overcome the disadvantages of the rubber-based wear strips whilst retaining their major advantages.
According to a first aspect of the present invention, a wear strip comprises an elongate body of metal of substantially rectangular (or square) cross-section, and wear resistant tiles bonded to the metal body and extending across one face from at least one edge of the metal body, the tiles being spaced from each other along the metal body, and the metal body being provided with slots extending a major distance through the metal body from the opposite face to the one carrying the tiles, with the slots in alignment with the gaps between the tiles.
The metal is preferably mild steel, thus enabling the body to be "stitch" welded to material handling equipment formed of steel (but other metal may be used for the body and may be welded or brazed to equipment of similar metal) and worn wear strips can be removed readily by means of a cutting torch or an angle grinder.
The slots in the body aligned with the gaps between the tiles make it possible to bend the strip to suit the curvature of say a scraper or a plough blade, and also make it relatively easy to cut the wear strip into smaller lengths The slots are preferably wider than the gaps, so as to afford clearance over a saw blade of a thickness to pass through the gaps.
The tiles are preferably located in a rebate, leaving the other edge of that face of the metal body available for welding (or brazing) and the end tiles are preferably also set slightly short of the ends of the body. Chamfers are preferably provided along two adjacent edges of the body for ease of welding (or brazing).
According to a second aspect of the present invention, a wear strip as in the first aspect also has further wear resistant tiles extending across the adjacent face of the metal body from the same edge as the first-mentioned wear resistant tiles, with the further tiles having gaps between them aligned with the gaps between the first-mentioned tiles, for use of the wear strip for protecting a leading edge of equipment, such as a pan mixer blade. The overlapping of the edges of the slots by the further tiles minimises wear in these regions.
According to a third aspect of the present invention, a wear strip as in the first or second aspect has a metal body with a cross-section of substantially right-angled triangular form, enabling the wear strip to be used along the edge of a sc
REFERENCES:
patent: 3529677 (1970-09-01), Stephenson
patent: 4052802 (1977-10-01), Moen et al.
patent: 4128132 (1978-12-01), Moen et al.
patent: 4570366 (1986-02-01), Yost
patent: 4753299 (1988-06-01), Meyers
Milard (Hard Metals) Limited
Olsen Arlen L.
Reese Randolph A.
LandOfFree
Wear strips does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Wear strips, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Wear strips will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-14733