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> 2006
> New 2 crimped bushing system us patent 6430774
New 2 crimped bushing system us patent 6430774
2 New Crimped bushing system US Patent 6430774
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A pivot bushing for a suspension system has an inner metal and an outer metal with an elastomeric bushing disposed between the metals. The outer metal has one end which is partially closed by an inwardly curved portion and one end which is open. The assembly of the bushing is through the open end. Once assembled the open end is closed by placing a cover over the open end and crimping the cover to a flange formed at the open end. In another embodiment, the cover is inserted into the outer metal and the outer metal is crimped to secure the cover in place
The present invention provides the art with a pivot bushing which provides the improved performance of the double-ended crimped bushings while still allowing for the use of the lower cost drawn shell outer metal. The present invention includes an outer metal having one end crimped toward the inner metal with the other end forming a radially outwardly extending flange. A separate stamping is attached to the flanged end in order to provide the compression and restriction for the elastomer. The outer metal of the present invention can be manufactured from the lower cost drawn shell material and because of its open configuration at one end, the outer metal can be heat treated prior to assembly with the inner metal and elastomer. Also, since axial motion for the pivot bushings is normally in one direction, the pivot bushing of the present invention can be assembled to restrict motion.
Other advantages and objects of the present invention will become apparent to those skilled in the art from the subsequent detailed description, appended claims and drawings
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