Patents by Inventor Alan R. Pindred

Alan R. Pindred 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).

  • Centrifugal flotation cell with rotating feed
    Patent number: 6126836
    Abstract: A superb centrifugal flotation cell with a rotating feed, is provided for use in an effective separation process to rapidly recover greater quantities of valuable fine particles. In the process, a slurry of fine particles is injected with air bubbles and moved downwardly through a stationary pipe and a rotating feed line comprising a centrifugal rotating downfeeder. The slurry is centrifugally discharged from the rotating downfeeder into the flotation chamber where the slurry is separated into a waste stream of non-floating gangue material and a particulate-enriched froth comprising air bubbles carrying a substantial amount of the valuable fine particles for further processing.
    Type: Grant
    Filed: April 12, 1999
    Date of Patent: October 3, 2000
    Assignee: Inter-Citic Mineral Technologies, Inc.
    Inventors: Jian Ding, Wan-Tai Yen, Alan R. Pindred
  • Process for recovering fine particulates in a centrifugal flotation cell with rotating drum
    Patent number: 6059118
    Abstract: A user-friendly centrifugal flotation cell with a rotating drum, is provided for use in an efficient separation process to rapidly recover greater quantities of valuable fine particles. In the process, a slurry of fine particles is injected with air bubbles and moved downwardly through a stationary downfeeder to a centrifuge comprising a rotating flotation cell. The aerated slurry is centrifugally separated into a waste stream of non-floating gangue material and a particulate-enriched froth comprising air bubbles carrying a substantial amount of the valuable fine particles. The froth is processed by froth flotation in a froth flotation chamber.
    Type: Grant
    Filed: April 12, 1999
    Date of Patent: May 9, 2000
    Assignee: Inter-Citic Mineral Technologies, Inc.
    Inventors: Jian Ding, Wan-Tai Yen, Alan R. Pindred
  • Centrifugal flotation cell with rotating drum
    Patent number: 5928125
    Abstract: A user-friendly centrifugal flotation cell with a rotating drum, is provided for use in an efficient separation process to rapidly recover greater quantities of valuable fine particles. In the process, a slurry of fine particles is injected with air bubbles and moved downwardly through a stationary downfeeder to a centrifuge comprising a rotating flotation cell. The aerated slurry is centrifugally separated into a waste stream of non-floating gangue material and a particulate-enriched froth comprising air bubbles carrying a substantial amount of the valuable fine particles. The froth is processed by froth flotation in a froth flotation chamber.
    Type: Grant
    Filed: June 9, 1997
    Date of Patent: July 27, 1999
    Assignee: Inter-Citic Envirotec, Inc.
    Inventors: Jian Ding, Wan-Tai Yen, Alan R. Pindred
  • Centrifugal flotation cell with rotating feed
    Patent number: 5914034
    Abstract: A superb centrifugal flotation cell with a rotating feed, is provided for use in an effective separation process to rapidly recover greater quantities of valuable fine particles. In the process, a slurry of fine particles is injected with air bubbles and moved downwardly through a stationary pipe and a rotating feed line comprising a centrifugal rotating downfeeder. The slurry is centrifugally discharged from the rotating downfeeder into the flotation chamber where the slurry is separated into a waste stream of non-floating gangue material and a particulate-enriched froth comprising air bubbles carrying a substantial amount of the valuable fine particles for further processing.
    Type: Grant
    Filed: June 9, 1997
    Date of Patent: June 22, 1999
    Assignee: Inter-Citic Envirotec, Inc.
    Inventors: Jian Ding, Wan-Tai Yen, Alan R. Pindred