Patents by Inventor Larry D. Lietz

Larry D. Lietz 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).

  • Foot-actuated valves
    Patent number: 5203373
    Abstract: A foot-actuated valve assembly operable for delivering either a mixture of hot and cold water through a faucet, or solely cold water to the faucet. The user selectively actuates one of two sides of a kick plate. Actuation of one side of the kick plate causes a mixture of hot and cold water to flow through the faucet. Actuation of the other side of the kick plate causes only cold water to flow through the faucet.
    Type: Grant
    Filed: June 1, 1992
    Date of Patent: April 20, 1993
    Assignee: A-Dec, Inc.
    Inventors: George K. Austin, Jr., Larry D. Lietz
  • Fail-secure lock system
    Patent number: 4691948
    Abstract: A fail-secure lock apparatus includes a normally pneumatically actuated locking bolt that can be manually operated to withdraw the same in the event of a power failure. The apparatus incorporates a standard key operated lockset connected to operate the pneumatic power drive means or, in the event of a power failure, is connected to rotate a cable reel mechanically to effect movement of the locking bolt to the unlocked position.
    Type: Grant
    Filed: November 27, 1985
    Date of Patent: September 8, 1987
    Assignee: A-DEC, Inc.
    Inventors: George K. Austin, Jr., Larry D. Lietz
  • Dental control unit
    Patent number: D328791
    Type: Grant
    Filed: November 27, 1990
    Date of Patent: August 18, 1992
    Assignee: A-Dec, Inc.
    Inventors: Carl Nordstrom, Larry D. Lietz, George K. Austin, Jr., Raymond G. Reed
  • Instrument support attachment for dental equipment
    Patent number: D336131
    Type: Grant
    Filed: October 1, 1991
    Date of Patent: June 1, 1993
    Assignee: A-Dec, Inc.
    Inventors: Carl G. Nordstrom, Larry D. Lietz, Larry D. Osterhoudt