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Vent-blocking inflatable bladder for a retrofit HVAC zone control system

  • US 7,207,496 B2
  • Filed: 12/31/2003
  • Issued: 04/24/2007
  • Est. Priority Date: 03/21/2003
  • Status: Expired due to Term
First Claim
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1. A pneumatic bladder assembly for use as an airflow control mechanism in an HVAC system, in which an air pump selectably provides one of pressure and vacuum to an air tube extending through ductwork of the HVAC system, the pneumatic bladder assembly comprising:

  • an inflatable and deflatable bladder having a nipple for coupling to the air tube;

    a pin piercing the nipple and the air tube, thereby securing the air tube to the nipple; and

    a band surrounding the nipple and the pin to prevent the pin from dislodging from the nipple.

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