Patents Assigned to Chern Developments Limited
  • Pressure vessel construction
    Patent number: 4411372
    Abstract: A lid for a pressure vessel which is seamless and which includes a peripheral groove in an outer surface formed by deforming the material of the lid, for example by a swaging process. The groove accommodates a seal, such as an O-ring.
    Type: Grant
    Filed: December 3, 1981
    Date of Patent: October 25, 1983
    Assignee: Chern Developments Limited
    Inventors: Ernest P. Basterfield, Parker L. Basterfield