Patents by Inventor Ronald Sherwood

Ronald Sherwood 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).

  • Mixer for pulverous and liquid materials (essentially cement and water), of liquid-liquid materials
    Patent number: 4834542
    Abstract: The invention consists of a centrifugal mixer with an upper rotor (3) for projection of particles, which is hard-mounted to rotor (4) allowing centrifuging of fluid (15).The invention lies in the creation of a low-pressure zone within the high-pressure zone of enclosure (23), for introduction of particles (20); this in turn requires the use of disturber (27).The result is a remarkable degree of mixing of the water and cement and has applications for oil field services.
    Type: Grant
    Filed: August 1, 1988
    Date of Patent: May 30, 1989
    Assignee: Dowell Schlumberger Incorporated
    Inventor: Ronald Sherwood