Patent ID: 6152640
Filing Date: 2000-11-28
Classification: F16C,Y10T

Abstract:
A ball joint comprising:a housing having an inner chamber therein;said inner chamber including an opening;a bearing seat in said inner chamber of said housing and having an insertion hole;a ball stud having a ball head portion adapted to be slidably enveloped by said bearing seat and a stud portion integrally formed with said ball head portion and projecting from said insertion hole;a plurality of sliding contact portions protruding inward from an inner cylindrical surface of said bearing seat;said plurality of sliding contact portions being aligned substantially on a circle surrounding said ball head portion at a bottom of said inner cylindrical surface;spaces between said sliding contact portions forming clearances between said bearing seat and said ball head portion adapted to contain lubricant; andsaid bearing seat having a second plurality of sliding contacts shaped in strips with trapezoidal cross sections and positioned near a top of said bearing seat with a long azis perpendicular to said bottom.