Surgery – Truss – Pad
Patent
1975-03-19
1976-04-20
Michell, Robert W.
Surgery
Truss
Pad
128145R, B63C 1116
Patent
active
039511421
ABSTRACT:
In underwater breathing apparatus comprising a hollow, substantially spherical float member having a water level at which the surface of a body of water is located when the float member is operatively floating therein, a partition mounted within the float member and dividing the interior thereof into two compartments, a mouthpiece for mounting on the mouth of a user in communication with the respiratory system of the user, an inlet conduit through which one of the compartments is in communication with the mouthpiece, and an outlet conduit through which the mouthpiece is in communication with the other of the compartments, the partition is disposed horizontally with said one of the compartments being constituted by an upper compartment and said other of the compartments being constituted by a lower compartment, so that when the apparatus is in use the float member operatively tends to be stabilized. Air inlets are provided in the float member for passage of atmospheric air to the upper compartment, and an air outlet is provided in the float member below the water level for discharge of air from the lower compartment, with a check valve being incorporated in this air outlet for permitting flow therethrough only in the direction from the lower compartment. Further check valves are incorporated in the inlet conduit and the outlet conduit for permitting flow of air therethrough only in the direction from the upper compartment to the mouthpiece and in the direction from the mouthpiece to the lower compartment, respectively.
REFERENCES:
patent: 156599 (1874-11-01), Schmitz
patent: 836950 (1906-11-01), Iwanami
patent: 908690 (1909-01-01), Neubert
patent: 1197115 (1916-09-01), Fell et al.
patent: 1946126 (1934-02-01), Black
patent: 2362240 (1944-11-01), Bonilla
patent: 3370586 (1968-02-01), Aragona et al.
Michell Robert W.
Recla Henry J.
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