FASTENER Russian patent published in 1996 - IPC

FIELD: units for connecting parts made of different and dissimilar materials; tightness of holes and circular clearances. SUBSTANCE: fastener is made in form of length of rod, solid or tubular made from polymer material subjected to drawing; this material possesses property to restore its sizes after subsequent heating; this may be copolymer of methyl methacrylate with acrolonitrile with metal extended helical spring axially embedded in polymer. Cylindrical surfaces of fastener may be provided with screw thread. Wall of tubular fastener may be split over helical line between spring coils. EFFECT: enhanced reliability. 7 cl, 44 dwg