Patents Assigned to Guth Laboratories, Inc
  • Breath test simulator with headspace fan and method
    Patent number: 9810682
    Abstract: A breath test simulator includes a jar holding an ethyl alcohol/water solution. A heated metal top housing on the top of the jar supports a baffle plate extending over the solution. Ethyl alcohol/water vapor is flowed from the solution into a headspace between the baffle plate and the top housing. A rotary fan in the headspace circulates vapor in the headspace and moves the vapor against the housing to heat the vapor. The heated vapor is circulated and heats the jar to speed warm up of the simulator and assure the headspace vapor is maintained at a desired temperature prior to discharge to a breath test instrument to be calibrated.
    Type: Grant
    Filed: February 10, 2015
    Date of Patent: November 7, 2017
    Assignee: Guth Laboratories, Inc.
    Inventor: Shawn P. Barry
  • Breath test simulator and method
    Patent number: 8667829
    Abstract: A breath test simulator for supplying a breath test analyzer with a vapor including ethyl alcohol includes a heated thermal mass to heat an inlet passage.
    Type: Grant
    Filed: January 20, 2011
    Date of Patent: March 11, 2014
    Assignee: Guth Laboratories, Inc.
    Inventors: Richard U. Guth, Shawn P. Barry
  • Breath test simulator and method
    Patent number: 7895878
    Abstract: A breath test simulator for supplying a breath test analyzer with a vapor including ethyl alcohol includes a heated thermal mass to heat an inlet passage.
    Type: Grant
    Filed: October 7, 2009
    Date of Patent: March 1, 2011
    Assignee: Guth Laboratories, Inc.
    Inventors: Richard U. Guth, Shawn P. Barry
  • Breath test simulator
    Patent number: 7404311
    Abstract: A breath simulator for supplying a breath test analyzer with a sample effluent of ethyl alcohol that controls headspace and adjacent effluent passageway temperature.
    Type: Grant
    Filed: September 11, 2006
    Date of Patent: July 29, 2008
    Assignee: Guth Laboratories, Inc.
    Inventors: Richard U Guth, David A. Fisher
  • Breath Test Simulator
    Publication number: 20080060409
    Abstract: A breath simulator for supplying a breath test analyzer with a sample effluent of ethyl alcohol that controls headspace and adjacent effluent passageway temperature.
    Type: Application
    Filed: August 24, 2007
    Publication date: March 13, 2008
    Applicant: GUTH LABORATORIES, INC.
    Inventors: Richard U. Guth, David A. Fisher
  • Portable breath test simulator
    Patent number: 6526802
    Abstract: A portable breath test simulator including a case having a jar support arm extending to one side of the top of the case. A jar containing a known water-alcohol solution is mounted on the bottom of the arm. The case and jar support the simulator. A magnetic power drive located in the case to one side of the jar rotates a magnetic stirrer in the jar. Breath blown into the jar forms an effluent having a known concentration of alcohol and is flowed to a breath test analyzer to be tested.
    Type: Grant
    Filed: June 28, 2001
    Date of Patent: March 4, 2003
    Assignee: Guth Laboratories, Inc
    Inventors: David A. Fisher, Richard U. Guth