US Patent No: 6,119,723
Number of patents in Portfolio can not be more than 2000
Apparatus for varying the flow area of a conduit
Stats
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Sep 19, 2000
Issued date -
Feb 13, 1998
filing date -
09/023,348
serial no -
In Force
status
Importance
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Abstract
An apparatus (10) for varying the flow area of a conduit (12). The apparatus comprises a flap (14) mounted in said conduit (12) which is off-center pivotally mounted to pivot in response to flow of fluid (F) through said conduit (12). The apparatus (10) also includes biasing means associated with the flap to rotationally urge the flap against the action of the flow (F).
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First Claim
Related Publications
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International Classification(s)
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Cited Art
| Patent Info | (Count) | # Cites | Year |
|---|---|---|---|
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| 4,913,401 Valve apparatus | 62 | 1989 | |
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| 5,231,983 Method of and apparatus for the aerosol administration of medication | 128 | 1991 | |
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| 5,404,871 Delivery of aerosol medications for inspiration | 248 | 1991 | |
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| 5,715,812 Compliance meter for respiratory therapy | 103 | 1996 | |
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