Variable resistance device for a high pressure air supply system

Number of patents in Portfolio can not be more than 2000

United States of America Patent

PATENT NO 6273141
SERIAL NO

09599326

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Abstract

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A variable resistance device for use in a duct of a high pressure air supply system employs a rotatable butterfly damper locatable in the air supply system having a closed and an open position for variably restricting airflow through the air supply system. The butterfly damper is provided with apertures which permit air to flow through the butterfly damper even when it is in a closed position. The apertures are sized to provide a maximum resistance value at a minimum air flow rate in a closed position, a minimum resistance value at a maximum air flow rate in a 70% open position, and a nearly linear relationship between an angular rotation position of the butterfly damper and resistance.

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Patent Owner(s)

Patent OwnerAddress
THE BABCOCK & WILCOX POWER GENERATION GROUP INC20 S VAN BUREN AVENUE BARBERTON OH 44203

International Classification(s)

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  • 2000 Application Filing Year
  • F15D Class
  • 28 Applications Filed
  • 12 Patents Issued To-Date
  • 42.86 % Issued To-Date
Click to zoom InYear of Issuance% of Matters IssuedCumulative IssuancesYearly Issuances200020012002200320040255075100

Inventor(s)

Inventor Name Address # of filed Patents Total Citations
DeSellem, James Frederick Lisbon, OH 1 12

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Patent Citation Ranking

  • 12 Citation Count
  • F15D Class
  • 66.67 % this patent is cited more than
  • 24 Age
Citation count rangeNumber of patents cited in rangeNumber of patents cited in various citation count ranges26401 - 1011 - 2000.511.522.533.544.555.566.5

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