US Patent No: 4,259,951

Number of patents in Portfolio can not be more than 2000

Dual valve for respiratory device

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ATTORNEY / AGENT: (SPONSORED)

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Abstract

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A dual valve for an inhalation device which permits air to be withdrawn from the device upon inhalation but which prevents the flow of air into the device upon exhalation. The valve includes a central opening in communication with the device, and a plurality of openings about the central opening in communication with the surrounding environment. The valve also includes a central flexible flapper valve which extends across and controls the flow of air through the central opening, and a plurality of outer flexible flapper valves which extend across and control the flow of air through the outer openings. In use, inhalation by a user opens the central flexible flapper valve to allow the free flow of air from the inhalation device while the outer flapper valves remain closed. Correspondingly, exhalation by the user opens the outer flexible flapper valves from their seats to exhaust air to the surrounding atmosphere while the central flexible valve remains closed.

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Patent Owner(s)

Patent OwnerAddressTotal Patents
SHERWOOD MEDICAL COMPANYST LOUIS, MO36

International Classification(s)

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Inventor(s)

Inventor Name Address # of filed Patents Total Citations
Chernack, Milton P West Hempstead, NY 20 405
Greenberg, Mishel New Hyde Park, NY 4 94

Cited Art Landscape

Patent Info (Count) # Cites Year
 
OMNISHELL 1300 FOUNTAIN SQUARE SOUTH, CINCINNATI, OH 45202 A CORP OF DE (1)
4,182,347 Air inhalation flow rate measuring device 9 1978

Patent Citation Ranking

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Patent Info (Count) # Cites Year
 
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Other [Check patent profile for assignment information] (8)
4,574,797 Diaphragm and exhaust valve for second stage regulator 8 1983
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