Patents by Inventor C. Brent Cluff

C. Brent Cluff 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).

  • Method and apparatus for removing minerals from a water source
    Publication number: 20080029456
    Abstract: A system and method for removing minerals from a water source and concentrating these minerals for ease of reuse or disposal includes passing the water from a suitable source through cascaded membrane filters, the reject outputs of each of which are connected to the inputs of the next membrane filter in the cascade. At the input of each of the membrane filters, a pre-filter in the form of a micro-filtration filter, an ultra filtration filter, or a slow sand filter, is used to remove sediment and impurities from the water stream prior to the application of the water to the input of the next membrane filter in the cascade.
    Type: Application
    Filed: August 3, 2006
    Publication date: February 7, 2008
    Inventors: Leonard L. Dueker, C. Brent Cluff
  • Semi-permeable membrane filtering systems for swimming pools
    Patent number: 5234583
    Abstract: A nanofiltration and/or reverse osmosis system for filtering swimming pool water which system and apparatus eliminates dissolved organic and inorganic matter that is not removed by conventional swimming pool water treatment filtering systems.
    Type: Grant
    Filed: July 26, 1991
    Date of Patent: August 10, 1993
    Inventor: C. Brent Cluff
  • Slow sand/nanofiltration water treatment system
    Patent number: 5112483
    Abstract: A water treatment device comprising a slow sand filter in fluid flow combination with a nanofilter for water pretreatment purposes. The nanofilter is surrounded by a housing spacedly arranged thereto which housing is capped at each end and axially aligned with and connected to a T-shaped pipe fitting at each end thereof. A pipe is arranged to extend axially through the T-shaped fittings, the caps and the nanofilter which pipe is apertured along that portion thereof in said nanofilter. Water fed from the slow sand filter into one T-shaped fitting is directed inwardly and laterally through the nanofilter with the purified water flowing through the apertures of the pipe with a discarded portion of the water being conducted through the second T-shaped pipe fittings out of the device for disposal purposes.
    Type: Grant
    Filed: February 4, 1991
    Date of Patent: May 12, 1992
    Inventor: C. Brent Cluff
  • Water-borne azimuth-altitude tracking solar concentrators
    Patent number: 4771764
    Abstract: A water-borne tracking solar energy collecting and converting system employing multiple lens collectors for redirecting sunlight for concentration on photovoltaic cells.
    Type: Grant
    Filed: April 6, 1984
    Date of Patent: September 20, 1988
    Inventor: C. Brent Cluff
  • Tracking booster and multiple mirror concentrator floating collector
    Patent number: 4296731
    Abstract: A water-borne tracking solar energy collecting and converting system employing booster and multiple mirror concentrator collectors for concentrating sunlight on either photovoltaic cells and/or flat plate collectors.
    Type: Grant
    Filed: June 1, 1978
    Date of Patent: October 27, 1981
    Inventor: C. Brent Cluff
  • Water-borne rotating solar collecting and storage systems
    Patent number: 4148301
    Abstract: A water-borne solar energy collecting and converting system employing an azimuth-tracking, floating platform equipped with reflectors and associated thermal collector tubes.
    Type: Grant
    Filed: September 26, 1977
    Date of Patent: April 10, 1979
    Inventor: C. Brent Cluff