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Integral air intake apparatus

  • US 5,201,685 A
  • Filed: 04/25/1991
  • Issued: 04/13/1993
  • Est. Priority Date: 04/25/1991
  • Status: Expired due to Fees
First Claim
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1. An air intake apparatus for regulating air flow into a structure and for mounting a duct through which the air flows, comprising:

  • a moldable plastic housing with air inlet and outlet ports, each of the ports including a periphery, the housing including a groove duct seat molded about the air inlet port periphery for seating the duct,a valve swingably mounted on the housing adjacent the air outlet port and responding to differential air pressure for allowing outside air through the outlet port and into the structure, the valve comprising a foam plastic panel for closing the air outlet port and an adjustable counterweight extending from the panel to set the valve for opening in response to the differential air pressure, anda valve seat portion engageable with the form plastic panel adjacent the air outlet port and extending from and being integrally formed and molded with the housing, the valve seat portion comprising an integrally formed and molded elongate convex portion which is disposed transversely of where the valve is swingably affixed to the housing and which engages the valve when the valve is closed to minimize contact between the valve and valve seat and to permit the air to flow smoothly over the valve seat portion.

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