Plain bearing
AssigneeAeplc
InventorGlyndwr Davies
Life of this patent
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Abstract
A cavitation erosion resistant plain bearing comprising a steel backing, a sintered bronze interlayer and a lining of PTFE filled with 1 to 50% by volume of an ionic fluoride of low aqueous solubility.
Claims17
A plain bearing comprising a metal backing, a sinter layer on said metal backing and a bearing layer on said sinter layer, said bearing layer comprising a surface layer of polytetrafluoroethylene (PTFE) including 1 to 50% by volume of an ionic fluoride selected from the group consisting of CaF.sub.2, MgF.sub.2, SrF.sub.2 and mixtures thereof precipitated from an aqueous solution and having a solubility in water which is less than 0.5 g/cm.sup.3 at 18.degree. C., the ionic fluoride being in a finely divided form in the PTFE, the particle size being in the range from 0.01 to 10 microns.
A plain bearing comprising a metal backing, a sinter layer on said metal backing and a bearing layer on said sinter layer, said bearing layer comprising a surface layer of polytetrafluoroethylene containing from 1 to 50 volume percent of at least one ionic fluoride selected from the group consisting of CaF.sub.2, MgF.sub.2, SrF.sub.2 and mixtures thereof having a water solubility not greater than 0.05 grams per cubic centimeter at 18.degree. C. and a particle size in the range from 0.01 to 10 microns.
Dependencies are inferred from the claim text.