Patent ID: 11951251
Assignee: nan
Field: Medical technology (Instruments)
Classification: CPC A | IPC A

Claim 15:
16. A respiratory delivery system providing a bi-level pressure, the respiratory delivery system comprising:
a container configured to support a volume of liquid;
a lid configured to be secured to an upper end of said container, said lid defining an opening;
a pipe mounted in said container and configured to be at least partially submerged into the volume of liquid, said pipe having a lower end secured to a bottom surface of said container and an upper end portion supported in said opening, said pipe defining at least one vent opening at a midsection thereof, and said pipe defining a sidewall recess above said at least one vent opening, wherein said pipe is configured to receive a flow of breathable gas from a gas source;
a variable buoyancy float disposed along said pipe inside said container, said float configured to cyclically float up and down said pipe between a lower position and a higher position above said lower position, wherein when said float is in said higher position said at least one vent opening is occluded by said float and said sidewall recess is at least partially overlapped by said float; and
an adjustable pressure regulator in fluid communication with said pipe and with the gas source;
wherein said float is configured to cyclically shift a pressure level of said respiratory delivery system between a baseline pressure level when said float is in said lower position and gas bubbles are permitted to escape from said at least one vent opening, and a peak pressure level that is higher than said baseline pressure level when said float is in said higher position; and
wherein said peak pressure level is defined by a setting of said adjustable pressure regulator.