Therapeutic incentive spirometer
AssigneeHudson Oxygen Therapy Sales Company
InventorsVictor L. Bartholomew, Harold R. Havstad
Life of this patent
Estimating the term…
Abstract
A therapeutic incentive spirometer comprises a spirometer body having an outer wall and an inner wall, separated by a passageway, an interior chamber defined by said inner wall, a gas outlet for directing gas out of the chamber, a gas inlet means for directing gas into the chamber. A component for varying the flow rate of gas through either the gas inlet or outlet, and visual device associated with the interior chamber for indicating the rate of gas flow through the chamber. The preferred device includes a cap having a gas by-pass intake port located therein, which port is registered with a slanted surface on the outer body wall, the cap being movable relative to the body wall which movement changes the by-pass port opening size.
Claims21
An incentive spirometer comprising
- a spirometer body having a lower wall, an outer wall and an inner wall concentrically oriented with respect to each other and separated by a passageway, said inner and outer walls extending generally normal to said lower wall,
- an interior chamber defined by said inner wall, and cover means overlying said passageway and interior chamber,
- gas inlet means for directing gas downwardly into said chamber,
- passage means for directing gas out of said chamber, across said inner wall and into said passageway,
- gas outlet means for directing gas out of said passageway, through said outer wall to the exterior thereof,
- by-pass control means movably secured on said body and cooperating with said outer wall,
- a closable by-pass gas opening defined by said by-pass control means cooperating with said outer wall through which gas from the exterior enters said passageway, and wherein the size of said opening is varied as said by-pass control means is moved on said body, and
- visual means associated with said interior chamber for indicating the rate of gas flow through said chamber.
Dependencies are inferred from the claim text.