Safety design for medical oxygen supply valvehead
AssigneeL'Air Liquide, Societe Anonyme pour I'Etude et I'Exploitation des Procedes Georges Claude
InventorGlenn Van Ingelgem
Life of this patent
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Abstract
The disclosure describes a valve integrated pressure regulator in the form of a cylinder head. The device is intended for medical or emergency purposes and that is used to convert a medical or emergency gas pressure from a high, variable pressure to a lower, more constant working pressure. Two of the main features of the cylinder head design are special ignition event vent hole dimensions and configurations and a pressure regulated reversibly engaging-disengaging safety valve connected to these vent holes.
Claims11
A cylinder head comprising
- a) An inlet (30) and an outlet (150, 160),
- b) a pressure regulator (140) in fluid communication with the inlet (30) and the outlet (150, 160);
- c) a safety relief valve (270) in fluid communication with the pressure regulator (140) and along a fluid release flow path (80) between the pressure regulator (140) and the outlet (150, 160);
- d) an interior space (230) in fluid communication with the safety relief valve (270);
- and
- e) three or more vent holes (210) in fluid communication with the interior space (230) and an external atmosphere (260).
An oxygen cylinder assembly comprising a 300 bar, seamless steel or aluminum oxygen cylinder (20) operably connected to a cylinder head (10), the cylinder head (10) comprising
- a) an inlet (30) in fluid communication with a lumen (25) of the oxygen cylinder (20) and a connection outlet (160) conforming to a CGA, EIGA, NF, DIN, UNI or BSI standard;
- b) a flow regulated outlet (150) in fluid communication with a flow rate regulator (170);
- c) a pressure regulator (140) in fluid communication with the inlet (30) and the outlets (150, 160);
- d) a safety relief valve (270) in fluid communication with the pressure regulator (140) and along the fluid release flow path (80) between the pressure regulator (140) and the outlets (150, 160);
- A) wherein the safety relief valve comprises
- a sealing valve element (290) having a surface (295), the surface (295) in fluid communication with the pressure regulator (140);
- a spring (300) adapted to bias the sealing valve element (290) in a closed position;
- B) wherein the spring (300) is further adapted to yield when a pressure against the surface (295) exceeds a predetermined maximum pressure in the range of 301 to 360 bars to thereby allow the sealing valve element (290) to move into an open position;
- and
- C) wherein the spring (300) comprises a copper alloy having 1.80-2.00% beryllium and meeting the standards of C17200 (CDA 172) as defined by ASTM B196/B196M-07;
- e) an interior space (230) in fluid communication with the safety relief valve (270);
- and
- f) four vent holes (210) in fluid communication with the interior space (230) and an external atmosphere (260).
A cylinder head comprising
- a) a gas inletting means (30) and a gas out letting means (150, 160),
- b) a pressure regulating means (140) in fluid communication with the gas inletting means (30) and the gas out letting means (150, 160);
- c) a safety relief means (270) in fluid communication with the pressure regulating means (140) and along a fluid release flow path (80) between the pressure regulating means (140) and the gas out letting means (150, 160);
- d) an interior space (230) in fluid communication with the safety relief means (270);
- and
- e) three or more venting means (210) in fluid communication with the interior space (230) and an external atmosphere (260).
Dependencies are inferred from the claim text.