Patents by Inventor John Drane

John Drane 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).

  • Protective shroud for the shaft of a helical gear pump
    Patent number: 5145341
    Abstract: A helical gear pump in which a tubular shroud surrounds the drive shaft, the shroud being mounted in a housing of the pump at the end of the shroud remote from the stator and rotor, a seal being provided between the rotor and the tubular shroud.
    Type: Grant
    Filed: May 31, 1991
    Date of Patent: September 8, 1992
    Assignee: Mono Pumps Limited
    Inventor: John Drane