Segmented sliding sill wear plate
AssigneeZeftek, Inc.
InventorMichael K. Burke
Life of this patent
Estimating the term…
Abstract
A segmented sliding sill wear plate for universal application to fit a variety of installations and which includes a metal base plate having a plurality of low friction plastic pads bonded to the plate in spaced apart relation, wherein a single long wear plate with multiple pads can be made without warping and can thereafter be cut to size and suitably secured to a sliding sill support member such as by welding or by fastening devices. Because of the size of the plastic pad, a wear plate cut to size can withstand a wide range of temperatures without causing delamination of the plastic material or warping of the metal base.
Claims9
In an assembly including a stationary member and a movable member slidably supported on said stationary member and a wear plate means between the members, the improvement in said wear plate means which comprises, a flat metal base plate, a plurality of spaced pads of self-lubricating, high compressive strength plastic material molded and bonded to said plate, said pads having coplanar wear surfaces, said plastic material having a substantially higher coefficient of expansion than said metal base plate, means securing said base plate to said stationary member such that the plastic pads contact the movable member, and said pads sized to substantially eliminate internal stresses when subjected to a wide range of ambient temperature conditions experienced in normal operation to thereby prevent bowing of said wear plate and delamination of said plastic pads.
A wear plate for use on a vehicle for disposal between two normally relatively slidably engaging members to eliminate or correct a wear or breakaway force condition, said wear plate comprising a flat metal base plate adapted to be welded to one of said members and having a plurality of spaced apart pads molded and bonded to one side of said base plate against which the other member slidably engages, said pads being of a self-lubricating, high-compressive strength plastic and having a substantially higher coefficient of expansion than said base plate, wherein said pads are sized relative to the base plate to substantially eliminate high internal stresses such that buckling or warping of the metal base plate is avoided during making of the wear plate and when subjected to extreme cold or hot temperatures as found in general service.
In an assembly including a stationary member and a movable member slidably supported on said stationary member and a wear plate means between the members, the improvement in said wear plate means which comprises, a flat metal base plate, a plurality of spaced pads of self-lubricating, high compressive strength plastic material molded and bonded to said plate, said plastic material having a substantially higher coefficient of expansion than said metal base plate, means securing said base plate to said stationary member such that the plastic pads contact the movable member, and said pads sized to substantially eliminate internal stresses when subjected to a wide range of temperature conditions experienced in normal operation to thereby prevent bowing of said wear plate and delamination of said plastic pads and to be spaced apart so that the areas between pads can be welded to the stationary member when securing the wear plate to the stationary member without adversely affecting the material of the pads and to allow cutting of the base plate between the pads and leaving a sufficient amount of base plate for welding to a stationary member, whereby the wear plate may be segmented to fit substantially any installation.
Dependencies are inferred from the claim text.