Patents by Inventor David M. Hambley

David M. Hambley 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).

  • Underdrain apparatus and method of manufacturing same
    Patent number: 7410578
    Abstract: A filter underdrain apparatus and a method for manufacturing such apparatus. The apparatus includes a cover member, a water orifice member and a bottom member, each being individual pieces. The cover is placed over the water orifice member and connected thereto by welding. The bottom member is likewise connected to the cover and water orifice members by welding. A water passageway and an air passageway are defined in the inside of the assembled members. Water egress from the water passageway is provided by holes in the water orifice member and the cover. Air egress from the air passageway is provided by holes in the cover.
    Type: Grant
    Filed: August 24, 2004
    Date of Patent: August 12, 2008
    Assignee: Newtech Filter Systems, Inc.
    Inventors: David M. Hambley, Philip Hambley, Cole Carothers, Govert Bassett, II
  • Filter underdrain system for backwash flow and method for measuring same
    Patent number: 7138056
    Abstract: A filter underdrain system and a method for measuring the water flow through the underdrain filter system. The apparatus includes panel members assembled to form a perforate grid on the filter base structure of an underdrain block. The panels are generally rectangular and have an upper and lower surface. Multiple apertures are provided in the panel member. The number and/or size of the apertures are dimensioned to prevent the egress of filter media and to obtain substantially uniform backwash flow in the underdrain thereby reducing or eliminating water maldistribution.
    Type: Grant
    Filed: April 30, 1999
    Date of Patent: November 21, 2006
    Inventors: David M. Hambley, Philip Hambley
  • Underdrain apparatus
    Patent number: 6797166
    Abstract: A filter underdrain apparatus and a method for manufacturing such apparatus. The apparatus includes a cover member, a water orifice member and a bottom member, each being individual pieces. The cover is placed over the water orifice member and connected thereto by welding. The bottom member is likewise connected to the cover and water orifice members by welding. A water passageway and an air passageway are defined in the inside of the assembled members. Water egress from the water passageway is provided by holes in the water orifice member and the cover. Air egress from the air passageway is provided by holes in the cover.
    Type: Grant
    Filed: April 29, 2000
    Date of Patent: September 28, 2004
    Assignee: Newtech Filter Systems, Inc.
    Inventors: Philip Hambley, David M. Hambley, Cole Carothers, Govert Bassett, II
  • FILTER UNDERDRAIN SYSTEM FOR BACKWASH FLOW AND METHOD FOR MEASURING SAME
    Publication number: 20030132169
    Abstract: A filter underdrain system and a method for measuring the water flow through the underdrain filter system. The apparatus includes panel members assembled to form a perforate grid on the filter base structure of an underdrain block. The panels are generally rectangular and have an upper and lower surface. Multiple apertures are provided in the panel member. The number and/or size of the apertures are dimensioned to prevent the egress of filter media and to obtain substantially uniform backwash flow in the underdrain thereby reducing or eliminating water maldistribution.
    Type: Application
    Filed: April 30, 1999
    Publication date: July 17, 2003
    Inventors: DAVID M. HAMBLEY, PHILIP HAMBLEY