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Automatic ventilator
| Details |
Inventors: Kolt, Stanley;
Assignee: Suroff; Leonard W. (Jericho, NY)
Primary Examiner: Krizmanich; George H.
Assistant Examiner:
Attorney, Agent or Firm: Suroff; Leonard W.
An automatic temperature responsive damper assembly for use within the conduit of a ventilating system designed to exhaust the air in a confined space to the atmosphere whereby the conduit may be opened in order to minimize excess heat build-up in the confined space and closed when it is desired to prevent heat loss from the confined space. The damper assembly includes at least one vane carried within the conduit, preferably two, with mounting means operatively associated with the conduit for pivotally securing the at least one vane thereto, so as to be movable between a generally open position and a generally closed position in the conduit to permit the passage of air therethrough in its open position. Camming means is secured to the at least one vane carried by the mounting means and includes a camming surface thereon with a temperature responsive drive assembly mounted to detect temperature changes in the conduit and adapted to actuate in response to temperature changes within a predetermined range. Transmission means couples the drive assembly to the camming means for communicating movement of the drive assembly to the camming means, such that the at least one vane is moved to varying positions in response to temperature changes in the ventilating conduit. Biasing means is provided for urging the camming means into contact with the transmission means in a direction opposite to the forces applied by the drive assembly, so as to obtain an automatic closing of the at least one vane irrespective of the mounted position of the conduit. |
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DETAILED DESCRIPTION An automatic temperature responsive damper assembly for use within the conduit of a ventilating system designed to exhaust the air in a confined space to the atmosphere whereby the conduit may be opened in order to minimize excess heat build up in the confined space and closed when it is desired to prevent heat loss from the confined space.
The assembly includes at least one vane carried within the conduit, preferably two, with mounting means operatively associated with the conduit for pivotally securing the at least one vane thereto, so as to be movable between a generally open position and a generally closed position in the conduit to permit the passage of air therethrough in its open position.
Camming means is secured to at least one vane carried by the mounting means and includes a camming surface thereon.
A temperature responsive drive assembly is mounted to detect temperature changes in the conduit and adapted to actuate in response to temperature changes within a predetermined range.
Transmission means operatively extends between the drive assembly and the camming surface of the camming means for communicating movement of the drive assembly to the camming means, such that the at least one vane is moved to varying positions in response to temperature changes in the ventilating conduit.
Biasing means is provided for urging the camming means into contact with the transmission means in a direction opposite to the forces applied by the drive assembly, so as to obtain an automatic closing of the at least one vane irrespective of the mounted position of the conduit.
This overcomes the drawbacks of the prior art in which the vanes could possibly "stick" in their open position.
The biasing means may include a bracket member mounted in fixed relation to the transmission means on the side of the vane opposite to the drive assembly, and a spring mounted in telescopic relationship to the transmission means intermediate the bracket member and the vane, such that the spring normally urges the vane to remain in its closed position
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