Patents by Inventor William R. Nichols

William R. Nichols 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).

  • Patent number: 5147560
    Abstract: Improved methods are disclosed for cleansing a plurality of seriate filter beds in automatic backwash filtering systems by backwashing the beds one at a time with backwash liquid from an effluent channel common to seriate effluent ports of the plurality of filter beds and pumping the backwash liquid seriatim through separate effluent ports of individual filter beds and then flowing filtered effluent from each bed through its effluent port into the effluent channel, repeating such steps of backwashing and flowing filtered effluent on individual filter beds until all the filter beds in the system have been backwashed wherein, simultaneously with the backwashing of a second bed, waste liquid from the first bed is pumped through its port while the waste liquid is monitored for turbidity and such waste liquid pumping is continued until the turbidity thereof reaches a predetermined low level.
    Type: Grant
    Filed: September 16, 1991
    Date of Patent: September 15, 1992
    Assignee: Infilco Degremont Inc.
    Inventor: William R. Nichols
  • Patent number: 5089117
    Abstract: Improved methods are disclosed for cleansing a plurality of seriate filter beds in automatic backwash filtering systems by backwashing the beds one at a time with backwash liquid from an effluent channel common to seriate effluent ports of the plurality of filter beds and pumping the backwash liquid seriatim through separate effluent ports of individual filter beds and then flowing filtered effluent from each bed through its effluent port into the effluent channel, repeating such steps of backwashing and flowing filtered effluent on individual filter beds until all the filter beds in the system have been backwashed wherein, simultaneously with the backwashing of a second bed, waste liquid from the first bed is pumped through its port while the waste liquid is monitored for turbidity and such waste liquid pumping is continued until the turbidity thereof reaches a predetermined low level.
    Type: Grant
    Filed: August 1, 1990
    Date of Patent: February 18, 1992
    Assignee: Infilco Degremont Inc.
    Inventor: William R. Nichols
  • Patent number: 5089130
    Abstract: Automatic backwash filter systems including a filter tank divided into a multiplicity of seriate cells of substantially the same width by a plurality of vertical rectangular cell sheets are improved by provision of new spacer assemblies to mitigate bowing of the cell sheets during backwashing or other operations applied to the cells. Such spacer assemblies include horizontally aligned bores that extend through each cell sheet adjacent their top, one or more stringers that extend through the bores, and a plurality of tubes of approximately the same length substantially equal to the width of the cells. One of such tubes is positioned in each filter cell surrounding the stringer present in such cell and between the surfaces of the respective cell sheets. Where a plurality of stringers are used in the spacer assemblies arrangements are disclosed for making final connections to complete the assemblies.
    Type: Grant
    Filed: November 26, 1990
    Date of Patent: February 18, 1992
    Assignee: Infilco Degremont Inc.
    Inventor: William R. Nichols
  • Patent number: D261988
    Type: Grant
    Filed: April 19, 1979
    Date of Patent: November 24, 1981
    Assignee: Curwood Inc.
    Inventors: William R. Nichols, L. D. Robison, Samuel C. Swalby
  • Patent number: D357786
    Type: Grant
    Filed: January 26, 1994
    Date of Patent: April 25, 1995
    Inventor: William R. Nichols