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US Patent 7896001 Pressure-responsive device and associated method of manufacture

Patent 7896001 was granted and assigned to Pfizer Limited on March, 2011 by the United States Patent and Trademark Office.

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Patent abstract

There is provided a pressure-responsive device (40) suitable for use in an inhaler, the pressure-responsive device (40) comprising a closed frame (42) over which is fixed a membrane (44), a tongue (46) being supported on the membrane (44). Two upstanding wings (50) are integrally moulded with the tongue (46) and incorporate square apertures (52). A method of manufacturing the pressure-responsive device (40) is also provided.

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