Peak flow meter

Details Peak flow meter Peak flow meter

2005-05-10

2005-05-10

Lefkowitz, Edward (Department: 2855)

Measuring and testing

Volume or rate of flow

By measuring thrust or drag forces

C073S861750, C073S861760

Reexamination Certificate

active

06889564

ABSTRACT:
A peak flow meter for measuring a peak flow or air exhaled by a patient. The preferred peak flow meter includes a substantially hollow housing having a top portion, a bottom portion, an air inlet and at two air outlets. A flow restriction is disposed within the housing and in fluid communication with the air inlet. A vane assembly is disposed within the housing and includes a vane, a post to which the vane is fixedly attached, and a hub attached to the bottom portion of the housing. A torsion spring is engaged at one end to the hub and at the other to the post A visual indictor is movably disposed within the slot for indicating a peak flow rate of air based upon a movement of the vane and a scale is disposed proximate to the slot such that the location of the visual indicator may be related to a corresponding flow rate.

REFERENCES:
patent: 5253651 (1993-10-01), Stockwell et al.
patent: 5277195 (1994-01-01), Williams
patent: 5422057 (1995-06-01), Karbachsch et al.
patent: 5613497 (1997-03-01), DeBush
patent: 6126613 (2000-10-01), Edwards et al.

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