| 摘要 |
An apparatus for reducing abrasive wear within a housing that includes a body having at least one protrusion selectively positioned and extending outwardly from the outer surface thereof, the body being placed concentrically within the housing and rubbing against the inside surface thereof as the body is moved within the housing. The body is provided with a plurality of slides residing in a like number of grooves formed on the outside surface thereof, each of the slides having a groove formed in at least one side surface thereof The slides are affixed to the body by deforming the material comprising the body into the groove formed in the slide by striking the surface of the material comprising the body adjacent the groove in which the slide resides with enough force to deform the material comprising the body into the groove formed in the side surface of the slide. The apparatus is particularly effective for use with the sucker rod of a pump jack for a subterranean petroleum well.
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