Precision Medical, Inc.

L'air Liquide,societe Anonyme Pour L'etude Et L'exploitation Des Procedes Georges Claude

L'air Liquide, Societe Anonyme Pour L'etude Et L'exploitation Des

Stephen Bruce Krentler

Peter P Gale

Clyde W Shuman

Barry Wood

Hans Irr

Blair J Hollshwandner

Paul N Trevena

Paul Norman Trevena

A gas demand device cycles through five successive operation phases: gas is prevented from flowing through the timing gas and demand gas flow paths; gas is allowed to flow through the timing gas flow path and gas is prevented from flowing through the demand gas flow path; gas is allowed to flow through the timing gas and demand gas flow paths; gas is prevented from flowing through the timing gas flow path and gas is allowed to flow through the demand gas flow path; and gas is prevented from flowing through the timing gas and demand gas flow paths.

Gas demand device, method of installation, gas delivery system, and method of use

A pneumatic oxygen conserving device uses a portion of gas exiting its main valve to interrupt delivery of the gas. Gas is dispensed upon inhalation and is interrupted by means of suitable pneumatic connections between the device's delivery system and its sensing system.

Pneumatic oxygen conserving device

A pneumatic oxygen conserving device includes a reservoir of pressurized gas delivered upon inhalation through a single-lumen cannula. Gas flow is interrupted by a series of interconnected passages and chambers, including a check valve which is acted upon by the flow of gas being delivered through the delivery outlet of the device. The device is self regulating to the extent that oxygen pulses of appropriate volume are delivered irrespective of the breathing rate of the user. The device includes a plate with various passages and chambers defined therein in such a way as to reduce the overall length of the device.

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Bethlehem, PA, United States of America

Stephen Bruce Krentler