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Remotely controlled electrically actuated air flow control register

  • US 5,364,304 A
  • Filed: 12/17/1993
  • Issued: 11/15/1994
  • Est. Priority Date: 01/21/1993
  • Status: Expired due to Fees
First Claim
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1. A method of controlling air flow in an air circulating system, comprising the steps of:

  • (a) initially restricting air flow in a portion of said system at system startup by means of an air driven blade pitch controlled turbine positioned in said air flow of said air circulating system,(b) reducing said air flow restriction caused by said air driven blade pitch controlled turbine in said air flow in response to an increase in rotary speed of said air turbine induced by passage of air flow through said air flow turbine after initial staff-up, and(c) braking said air driven turbine to reduce rotary speed and return to a condition of initial air flow restriction in said portion of the system as that of system at start-up.

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