ApplicationNo. 292400 filed on 04/15/1999
US Classes:277/602, Contact seal for a pipe, conduit, or cable277/608, Inserted between end-to-end pipe, conduit, or cable joint277/936, Composite285/113, Wedged gasket285/232With conduit gripping means (e.g., wedge ring)
ExaminersPrimary: Browne, Lynne H.
Assistant: Miller, William L.
Attorney, Agent or Firm
International ClassF16L 017/00
AbstractA composite gasket for forming a seal between a pipe bell and a spigot comprises a first axially disposed portion formed of an elastomeric material and has a first leading edge and a first trailing edge, and a second axially disposed portion, adjacent the first axially disposed portion, formed of a generally non-elastomeric substantially rigid plastic, which comprises multiple, axially extending, laterally spaced apart, ramp-like projections separated by circumferential valleys, which expose elastomeric material. Fluid entering the valleys during a high pressure surge force the composite gasket into a tighter seal.
Field of SearchContact seal for a pipe, conduit, or cable
Having axially spaced projections
Having associated mounting or retaining feature
Inserted between end-to-end pipe, conduit, or cable joint
Particular seal shape
Particular seal material or construction
Socketed packing type
With conduit gripping means (e.g., wedge ring)
Frictional retention upon insertion