Spirometer accessory

Details Spirometer accessory Spirometer accessory

1985-01-18

1987-02-03

Recla, Henry J.

Surgery

Truss

Pad

128720, 128725, 12820524, 137908, 137854, 137856, A61B 508

Patent

active

046402934

ABSTRACT:
A mouthpiece for the inlet tube of a spirometer is formed to engage the inlet end of the tube and has a radially extending part or parts for preventing reverse fitting. An apertured valve seating has a valve diaphragm of flexible material for obstructing the return flow of air to the patient's mouth. The seating may have a projecting rim for engagement with the peripheral region of the diaphragm, and the diaphragm is preferably mounted so that it is planar on first engagement therewith. A ring may be arranged to be contacted by the diaphragm after initial bulging by back-pressure. Further deformation of the diaphragm is thereby controlled so that its peripheral region remains in engagement with the rim.

REFERENCES:
patent: 162598 (1875-04-01), Bailey
patent: 3228418 (1966-01-01), Rosback et al.
patent: 3256910 (1966-06-01), Cupp
patent: 3262447 (1966-07-01), Burke
patent: 3949737 (1976-04-01), Nielsen
patent: 4253468 (1981-03-01), Lehmbeck

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