Mechanical damper control

  • US 8,371,286 B2
  • Filed: 10/22/2009
  • Issued: 02/12/2013
  • Est. Priority Date: 10/22/2009
  • Status: Active Grant
First Claim
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1. A damper control apparatus constructed as a standalone unit that is mountable in a unitized configuration on an exterior portion of a stove over an exhaust port thereof for regulating airflow therethrough dependent on temperature of air passing through the exhaust port, the damper apparatus comprising:

  • a housing adapted to be mounted on the stove over the exhaust port thereof, wherein the housing includes a central passage through which exhaust gasses from the exhaust port of the stove can flow;

    a damper mounted entirely on the housing, wherein the damper is rotatably coupled to the housing such that the damper can rotate about a first axis between an open position and a closed position;

    a damper adjustment shaft mounted entirely on the housing, wherein the damper adjustment shaft is rotatable about a second axis; and

    an expandable member coupled between the damper adjustment shaft and the damper within the central passage of the housing, wherein the expandable member and the damper is mounted entirely on the housing and the damper adjustment shaft is mounted entirely through the expandable member and the housing, wherein the expandable member is responsive to changes in temperature, wherein the expandable member is located at a position between the damper and an opening of the housing at which the exhaust gases enter the central passage of the housing, and wherein the expandable member comprises a first end portion coupled to the damper and a second end portion coupled to the damper adjustment shaft and wherein the expandable member moves responsive to changes in temperature and wherein movement of the expandable member moves the damper;

    wherein, the damper, the damper adjustment shaft, and the expandable member are each coupled to only each other and the housing for enabling regulation of the airflow through the exhaust port when the damper control apparatus is mounted on the stove.

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