Roll-formed bushing for sliding surface bearings
Method of manufacturing a dynamic pressure type slide bearing Patent #: 4875263
ApplicationNo. 807421 filed on 12/13/1991
US Classes:384/292, Helical or herring bone384/300, Polytetrafluorethylene (e.g., Teflon*)384/907.1, Jewel, glass, ceramic or carbon384/909, Plastic384/911, Including fiber384/913Metallic compounds
ExaminersPrimary: Footland, Lenard A.
Attorney, Agent or Firm
International ClassF16C 033/20
Foreign Application Priority Data1989-08-09 JP
AbstractA bearing with dynamic pressure grooves includes an outer cylinder made of a metal and a resin sheet bonded to the inner peripheral surface of the outer cylinder. The resin sheet is made of a thermoplastic resin, for example, a polytetra fluoroethylene, as a main component mixed with a wear-resistant improving material, for example, graphite or the like. The resin sheet is formed with a pattern of dynamic pressure generating grooves formed in an inner surface by plastic work. The pattern of grooves is varied depending on the types of relative movement between the outer cylinder and a shaft body, i.e., whether an axial linear movement, a rotational movement, or a spiral movement.