Powder chemical feeding device for nasal cavity

Surgery – Respiratory method or device – Means for mixing treating agent with respiratory gas

Reexamination Certificate

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C128S203150, C128S203190

Reexamination Certificate

active

10512857

ABSTRACT:
In a device to deliver a powdery medicine into a nasal cavity, one-way valve33is built in an air flow passage31of a capsule housing/holding part30, the one-way valve33is controlled for the opening pressure by a spring34and opens by a pressure of air from the pump50, the one-way valve end71does not interfere the setting/detaching operation of the capsule setting/detaching part40and the capsule K when the one-way valve33is opened and intrudes as far as the inside of the capsule to disperse the medicine in the capsule K when the one-way valve33is opened by pressing of the pump50upon dosing thereby capable of reliably dosing at a adequate dose also including the medicine falling as far as the one-way valve33to the nasal cavity of the user.

REFERENCES:
patent: 3888252 (1975-06-01), Side et al.
patent: 3906950 (1975-09-01), Cocozza
patent: 3949751 (1976-04-01), Birch et al.
patent: 5250287 (1993-10-01), Cocozza
patent: 5647349 (1997-07-01), Ohki et al.
patent: 5810004 (1998-09-01), Ohki et al.
patent: 5899202 (1999-05-01), Ohki et al.
patent: 5921236 (1999-07-01), Ohki et al.
patent: 5989217 (1999-11-01), Ohki et al.
patent: 6298846 (2001-10-01), Ohki et al.
patent: 6824080 (2004-11-01), Matsugi et al.
patent: 59-34267 (1984-02-01), None
patent: 9-253208 (1997-09-01), None
patent: 2001-95918 (2001-04-01), None
patent: 2004/087243 (2003-03-01), None
U.S. Appl. No. 10/550,490, in the name of Tatsuo Tsutsui, filed Mar. 27, 2003.
English Language Abstract of JP 5934267.
English Language Abstract of JP 2001-95918.
English Language Abstract of JP 9-253208.

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