Apparatus for controlling the pressure of gas by bubbling through a liquid, such as bubble CPAP
First Claim
1. Apparatus for controlling pressure of a gas in a system that depends on the pressure being produced by bubbling the gas through a liquid, said apparatus comprising a hollow vessel, a cap, and a positionable tube, said hollow vessel being arranged to have a predetermined amount of the liquid introduced therein, whereupon the surface of the liquid reaches a predetermined height in said vessel, said cap being located above the surface of the liquid in said vessel and including an opening through which said positionable tube extends, said positionable tube including a proximal portion arranged to be coupled to a source of the gas, whereupon the gas may flow into and through said positionable tube, said positionable tube including a distal portion which is linear and terminates at an outlet port through which the gas may exit to bubble up through the liquid when said outlet port is immersed in the liquid, said linear distal portion of said positionable tube cooperating with said opening in said cap so that said outlet port of said positionable tube can be located at any selected one of a plurality of predetermined, discrete distances below the surface of the liquid and held in place at such selected position against accidental displacement, at least one of said positionable tube and said cap including indicia thereon indicating the pressure of the gas in said system for each of said plurality of predetermined, discrete distances, said cap also including a vent opening.
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Accused Products
Abstract
Apparatus for effecting bubble CPAP. The apparatus includes a hollow vessel holding a liquid, a cap, and a positionable tube assembly. The positionable tube assembly comprises a guide tube and a positionable tube. The positionable tube is arranged to have a gas introduced through it and is located within the guide tube. The positionable tube is arranged to be slid to various discrete longitudinal positions with respect to the guide tube and to be held in any one of those discrete positions against accidental displacement so that the lower free end of the positionable tube is held at a desired position below the surface of the liquid.
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Citations
14 Claims
- 1. Apparatus for controlling pressure of a gas in a system that depends on the pressure being produced by bubbling the gas through a liquid, said apparatus comprising a hollow vessel, a cap, and a positionable tube, said hollow vessel being arranged to have a predetermined amount of the liquid introduced therein, whereupon the surface of the liquid reaches a predetermined height in said vessel, said cap being located above the surface of the liquid in said vessel and including an opening through which said positionable tube extends, said positionable tube including a proximal portion arranged to be coupled to a source of the gas, whereupon the gas may flow into and through said positionable tube, said positionable tube including a distal portion which is linear and terminates at an outlet port through which the gas may exit to bubble up through the liquid when said outlet port is immersed in the liquid, said linear distal portion of said positionable tube cooperating with said opening in said cap so that said outlet port of said positionable tube can be located at any selected one of a plurality of predetermined, discrete distances below the surface of the liquid and held in place at such selected position against accidental displacement, at least one of said positionable tube and said cap including indicia thereon indicating the pressure of the gas in said system for each of said plurality of predetermined, discrete distances, said cap also including a vent opening.
Specification