Patents by Inventor Leonard T. Williams

Leonard T. Williams 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).

  • Bench top tubing sealer
    Patent number: 6784407
    Abstract: A desk top sealer includes three compartments for housing a solenoid assembly, a power supply and a circuit board, respectively. A source of air flow flows into an initial compartment and is channeled through apertures in brackets forming the two remaining compartments for cooling purposes and is exhausted from each compartment through a base. The circuit board, upon actuation, provides RF energy to a fixed ceramic/metal jaw to heat and weld plastic tubing clamped to the fixed jaw by a movable jaw at ground potential. The movable jaw is guided during translation by a pair of rods extending from a face plate, which rods also prevent rotation of the movable jaw about its axis of translation to maintain the movable jaw in alignment with the fixed jaw. The movable jaw is relatively massive to serve as a heat sink for the heat of the tubing being welded and includes a substantial surface area to dissipate to the ambient environment any heat buildup that may occur.
    Type: Grant
    Filed: February 27, 2003
    Date of Patent: August 31, 2004
    Assignee: Engineering & Research Associates, Inc.
    Inventors: Douglas F. Wright, Leonard T. Williams, Tulsie P. Summer
  • Bench top tubing sealer
    Publication number: 20040035844
    Abstract: A desk top sealer includes three compartments for housing a solenoid assembly, a power supply and a circuit board, respectively. A source of air flow flows into an initial compartment and is channeled through apertures in brackets forming the two remaining compartments for cooling purposes and is exhausted from each compartment through a base. The circuit board, upon actuation, provides RF energy to a fixed ceramic/metal jaw to heat and weld plastic tubing clamped to the fixed jaw by a movable jaw at ground potential. The movable jaw is guided during translation by a pair of rods extending from a face plate, which rods also prevent rotation of the movable jaw about its axis of translation to maintain the movable jaw in alignment with the fixed jaw. The movable jaw is relatively massive to serve as a heat sink for the heat of the tubing being welded and includes a substantial surface area to dissipate to the ambient environment any heat buildup that may occur.
    Type: Application
    Filed: February 27, 2003
    Publication date: February 26, 2004
    Inventors: Douglas F. Wright, Leonard T. Williams, Tulsie P. Summer
  • Tubing sealer with protruding sealing head
    Patent number: D502475
    Type: Grant
    Filed: October 28, 2003
    Date of Patent: March 1, 2005
    Assignee: Engineering & Research Associates, Inc.
    Inventors: Douglas F. Wright, Leonard T. Williams
  • Bench mounted tubing sealer
    Patent number: D502476
    Type: Grant
    Filed: October 28, 2003
    Date of Patent: March 1, 2005
    Assignee: Engineering & Research Associates, Inc.
    Inventors: Douglas F. Wright, Leonard T. Williams
  • Electric power source for a plastic tubing sealer
    Patent number: D341567
    Type: Grant
    Filed: January 7, 1992
    Date of Patent: November 23, 1993
    Assignee: Engineering & Research Associates, Inc.
    Inventors: John B. Acker, Leonard T. Williams