Patents by Inventor Wf Roberts

Wf Roberts has filed for patents to protect the following inventions. This listing includes patent applications that are pending as well as patents that have already been granted by the United States Patent and Trademark Office (USPTO).

  • Dual purpose closure for heat exchangers
    Patent number: 4612980
    Abstract: Closures for double pipe and hairpin-type heat exchangers that permits opening the tube side of the closure without losing the shell side fluids or seal. A flanged split thrust ring is positioned between the shell side flange and the tube side flange and integrally connected with the tube sheet. Each connection bolt through the flange has a shoulder or threads interconnecting with the thrust ring for applying a force to maintain the seal between the shell side flange and the tube sheet.
    Type: Grant
    Filed: October 25, 1985
    Date of Patent: September 23, 1986
    Inventor: Wf Roberts
  • Dual purpose closure for heat exchangers
    Patent number: 4570701
    Abstract: Closures for double pipe and hairpin-type heat exchangers that permits opening the tube side of the closure without losing the shell side fluids or seal. A flanged split thrust ring is positioned between the shell side flange and the tube side flange and integrally connected with the tube sheet. Each connection bolt through the flange has a shoulder or threads interconnecting with the thrust ring for applying a force to maintain the seal between the shell side flange and the tube sheet.
    Type: Grant
    Filed: November 14, 1983
    Date of Patent: February 18, 1986
    Inventor: Wf Roberts
  • Dual purpose closure for heat exchangers
    Patent number: 4564065
    Abstract: Closures for double pipe and hairpin-type heat exchangers that permits opening the tube side of the closure without losing the shell side fluids or seal. A threaded thrust ring is positioned between the shell side flange and the tube side flange and integrally connected with the tube sheet. Each connection bolt through the flange has a shoulder or threads interconnecting with the thrust ring for applying a force to maintain the seal between the shell side flange and the tube sheet.
    Type: Grant
    Filed: August 17, 1984
    Date of Patent: January 14, 1986
    Inventor: Wf Roberts