Patents Assigned to Acorn Engineering Co., Inc.
  • Antifreeze system for instant water heaters
    Patent number: 6694093
    Abstract: An antifreeze heating system which prevents the freezing of water present in an instant water heater of the type having a primary heater which remains inactive under static flow conditions. A secondary heater is placed within an enclosed housing volume of the instant water heater, and electrically connected to a temperature-sensitive switch which activates the secondary heater when a monitored temperature, such as the ambient temperature, falls below a threshold value.
    Type: Grant
    Filed: January 25, 2002
    Date of Patent: February 17, 2004
    Assignee: Acorn Engineering Co., Inc.
    Inventors: Donald E. Morris, Robert L. Wheeler
  • Sink
    Patent number: D455200
    Type: Grant
    Filed: July 31, 2000
    Date of Patent: April 2, 2002
    Assignee: Acorn Engineering Co., Inc.
    Inventor: Keith D. Marshall