Patents by Inventor Malcolm Marshall

Malcolm Marshall 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).

  • Gear pump with gears having curved teeth and method of feeding elastomeric material
    Publication number: 20050147518
    Abstract: A gear pump and method for pumping elastomeric material having two gears with meshing herringbone gear teeth. Each of the gear teeth has helical side portions and a curved central portion which extends circumferentially of the gear a distance equal to at least one half the pitch of the gear teeth to provide a continuous squeezing contact between the teeth of the two gears for pumping a uniform strip of elastomeric material from the gear pump.
    Type: Application
    Filed: December 30, 2003
    Publication date: July 7, 2005
    Inventors: Bernard Nicolas, Gary Burg, Malcolm Marshall