Patents by Inventor William L. Andrews

William L. Andrews 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: 9028580
    Abstract: Methods are provided for processing municipal human waste such that the processed material is is greater than 99% free of pathogenic organisms. The processed material can be used as an organic fertilizer or a “Class A” organic fertilizer. The methods include reducing the moisture content of human sludge free of polymeric flocculant to less than about 30% moisture and processing the sludge through an extruder under conditions having a minimum temperature of about 140° C., a residence time of about 30 seconds, and an atmospheric pressure differential of about 40 atmospheres. The methods are economical and have numerous advantages including reduced use of fossil fuel, fast processing time, and production of an odor free organic fertilizer free of many land use restrictions.
    Type: Grant
    Filed: February 28, 2014
    Date of Patent: May 12, 2015
    Inventor: William L. Andrews
  • Patent number: 6669541
    Abstract: A method for grinding, polishing, buffing, scaling, and grooving a finish onto and into a workpiece. This method provides the versatility of a hand held type angle grinder to be used while being supported frog, a clamping device. Also provided is a means for supporting a hand held type angle grinder from a clamping device such as a tool post, a tool post tool holder, and a bench vice.
    Type: Grant
    Filed: November 3, 2001
    Date of Patent: December 30, 2003
    Inventor: William L. Andrews
  • Patent number: 6648737
    Abstract: A contour sanding apparatus for driving a sanding belt, the apparatus includes a body and a drive pulley rotatably attached to the body, the drive pulley comprising a drive-axle dimensioned for attachment to a source of rotation. A primary arm is fixedly attached to the body and includes an end portion to which a primary idler pulley is rotatably attached. A secondary arm is also provided. The secondary arm includes a first end portion to which a secondary idler pulley is rotatably attached and may include tensioning means for maintaining the sanding belt in tension. The secondary idler pulley is disposed in relation to the primary idler pulley such that the sanding belt forms a sanding portion between the primary idler pulley and the secondary idler pulley.
    Type: Grant
    Filed: March 21, 2001
    Date of Patent: November 18, 2003
    Inventors: William R. Deware, William L. Andrews
  • Publication number: 20030087595
    Abstract: A method for grinding, polishing, buffing, scaling, and grooving a finish onto and into a workpiece. This method provides the versatility of a hand held type angle grinder to be used while being supported frog, a clamping device. Also provided is a means for supporting a hand held type angle grinder from a clamping device such as a tool post, a tool post tool holder, and a bench vice.
    Type: Application
    Filed: November 3, 2001
    Publication date: May 8, 2003
    Inventor: William L. Andrews
  • Patent number: 6503128
    Abstract: A grinding attachment for use in conjunction with hand-held grinding or drilling power tools such as are commonly found around the house, and method for using this attachment. The purpose of the invention is to allow the homeowner and the like to have greater facility in performing surface sanding, grinding, or finish work on pieces of wood and the like. In particular, the goal is to provide proficiency in working with surfaces that are not planar or otherwise simple. By providing an appropriate compound support against which an abrasive belt or the like is to run as it works the surface, it is possible to have a variety of backing shapes ranging from a strictly planar backing to one that allows the abrasive material to take the shape of whatever piece is being pressed against it. The invention derives its motive power from a coupling to a power tool, typically by the insertion of a drive axle of the attachment into the chuck of a hand drill.
    Type: Grant
    Filed: June 7, 2000
    Date of Patent: January 7, 2003
    Inventors: William R. Deware, William L. Andrews
  • Publication number: 20030003854
    Abstract: A contour sanding apparatus for driving a sanding belt. the apparatus includes a body and a drive pulley rotatably attached to the body, the drive pulley comprising a drive-axle dimensioned for attachment to a source of rotation. A primary arm is fixedly attached to the body and includes an end portion to which a primary idler pulley is rotatably attached. A secondary arm is also provided. The secondary arm includes a first end portion to which a secondary idler pulley is rotatably attached and may include tensioning means for maintaining the sanding belt in tension. The secondary idler pulley is disposed in relation to the primary idler pulley such that the sanding belt forms a sanding portion between the primary idler pulley and the secondary idler pulley.
    Type: Application
    Filed: March 21, 2001
    Publication date: January 2, 2003
    Inventors: William R. Deware, William L. Andrews
  • Publication number: 20020086627
    Abstract: A flex plate attachment is used on a variety of different belt sanders for abrading on or into contoured areas. The flex plate attachment will include a light duty scale for use on light duty belt sanders, and a heavy duty scale for use on commercial and industrial belt sanders. The flex plate works in conjunction with the function of the existing belt tensioning device within the belt sander and being attached onto the required mounts which allows the flex plate to function accordingly within the existing work area of the belt sander.
    Type: Application
    Filed: January 3, 2001
    Publication date: July 4, 2002
    Inventors: William L. Andrews, William R. Deware
  • Publication number: 20010041498
    Abstract: An abrasive elastic material composed of an abrasive fixedly bonded to an elastic substrate and the process for producing this material and conforming it into the various shapes needed for its use with power tools and the like. The material can be used on any of a wide variety of mechanical abrading devices, and has the advantages of conforming to irregular surfaces, resisting ripping and tearing, reducing vibration, allowing more subtlety in the application of pressure with the abrading surface and prolonged useful life.
    Type: Application
    Filed: March 6, 2000
    Publication date: November 15, 2001
    Applicant: ANDREWS AND DEWARE
    Inventors: William L. Andrews, William R. Deware