Surgery – Respiratory method or device – Including body or head supported means covering user's scalp
Reexamination Certificate
2005-05-24
2005-05-24
Dawson, Glenn K. (Department: 3731)
Surgery
Respiratory method or device
Including body or head supported means covering user's scalp
C128S204180, C128S204260, C128S205280
Reexamination Certificate
active
06895961
ABSTRACT:
The invention relates to a fully closed circuit-pendulum-storage system wherein a given amount of a ready to breathe gas mixture made of various inert gases including hydrogen and oxygen is continuously conveyed between two highly pressurized gas containers. Initially, the required breathing gas leaves the pressurized gas container and reaches the circuit at a constant dosage according to the overdosing principle. The circuit consists of an inhalation bag, a diving helmet, an exhalation bag and a single or double pack CO2absorption filter. At a depth of 0-100 m a mixture of oxygen, nitrogen and helium is used as a breathing gas. At a depth of 100-700 m a given amount of hydrogen is mixed therewith according to the wishes of the diver, whereby the oxygen content should not exceed 3 vol. %. When the diver emerges from a depth of over 100 m, the hydrogen is removed from the breathing gas and from the circuit by means of palladium membrane diffusion or catalytic water conversion. The removal of hydrogen is controlled by hydrogen detectors. At this point only, the oxygen content can exceed 3 vol %.
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Edwin A. Link—“Our Man-In-Sea Project”, National Geographic, pp. 713-731, May 1963.
CCBS-Diving system for water depths down to 600 n—Dräger, pp. 1-8, Mar. 1988.
Gerhard F. K. Haux—“SUBSEA Manned Engineering”—Best Publishing Company, Carson, California. pp. 360-376 and pp. 438-479, 1982.
Burns Doane Swecker & Mathis L.L.P.
Dawson Glenn K.
Erezo Darwin
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