Mass oxygen distribution system

• US 8,402,965 B1
• Filed: 01/26/2010
• Issued: 03/26/2013
• Est. Priority Date: 01/30/2009
• Status: Expired due to Fees

• Current Assignee: Essex Cryogenics Of Missouri, Inc. (Assa Abloy AB)
• Original Assignee: Essex Cryogenics Of Missouri, Inc. (Assa Abloy AB)
• Inventors: Scharfenberg, Randolph E., Giordano, Anthony Francis
• Primary Examiner(s): Lucchesi, Nicholas
• Assistant Examiner(s): STOHR, LEAH C
• Application Number:
  US12/657,682
• Time in Patent Office: 1,155 Days
• Field of Search: 128/201.21, 128/204.17, 128/204.18, 128/204.21
• US Class Current: 128/201.21
• CPC Class Codes: A61M 16/10 Preparation of respiratory gases or vapours
• CPC Class Codes: A61M 2202/0007 introduced into the body
• CPC Class Codes: A61M 2202/0208 Oxygen
• CPC Class Codes: A61M 2202/03 Gases in liquid phase, e.g. cryogenic liquids
• CPC Class Codes: A61M 2205/18 with alarm
• CPC Class Codes: A61M 2205/8206 battery-operated
• CPC Class Codes: A61M 2205/84 for treating several patients simultaneously

Abstract

A mass oxygen distribution system (“MODS”) for mass delivery and distribution for of breathing oxygen has a mobile unit that stores a large amount of on board LOX and controls distribution of oxygen from the enclosure at safe pressure to one or more patient end users. An on board oxygen converter source within the enclosure stores preferably up to 75-liters of LOX, ready to be volatilized to provide gaseous oxygen for many hours. The enclosure being supported by wheeled support members, allowing the enclosure to be moved to and through premises where mass distribution to said one or more end users is required and quickly put into use. LOX in the pressurized vessel is provided to one of a dual set of vaporizers converts the liquid oxygen to cold gaseous breathing oxygen. A dual coil heat exchanger warms the cold breathing oxygen to safe breathing temperature. A warning system monitors temperature and pressure of the breathing oxygen. Dual auxiliary oxygen sources can be connected to the mobile unit and continuous oxygen supply can be maintained for hours or days by switching between the auxiliary sources such as of the VGL type. The dual vaporizer sets allow continuous vaporizing. The oxygen is distributed by specialized hose assembly to multiple patient distribution kits even if patients are scattered in various locations.

Claims

1. A mass oxygen distribution system (MODS) for mass delivery and distribution for of breathing oxygen, the system comprising:

a MODS mobile unit for storing a large amount of liquid breathing oxygen (LOX), meaning about at least 75 L of LOX,

within an enclosure of the MODS mobile unit for controlling the distribution of oxygen from said enclosure at safe pressure for being mass-distributed to one or more end users;

A LOX on board oxygen source within said enclosure having at least one pressurized vessel in which a relatively large amount of oxygen, meaning about at least 75 L of LOX, is maintained in a liquid state (LOX) in readiness for being volatilized to provide oxygen in vapor form for many hours of said distribution;

the enclosure being supported by wheeled support members for allowing the enclosure to be moved to and through premises where mass distribution to said one or more end users is required;

the enclosure being substantial in size but precisely dimensioned for being capable of fitting easily though passageways and doorways of a wide range of premises where mass distribution could be required;

a fill port of the enclosure for filling of the LOX converter;

a fill valve communicating with the fill port and in communication with the oxygen converter for providing oxygen from a main source thereof to the oxygen converter to provide LOX to the pressurized vessel for distribution by the mobile unit,

a fluid line providing liquid oxygen from the pressurized vessel to be changed to vapor form;

vaporizer array provision within the enclosure for converting the liquid oxygen to cold gaseous breathing oxygen;

heat exchanger provision within the enclosure for warming the cold gaseous breathing oxygen to safe breathing temperature;

dual input ports of said enclosure adapted for receiving oxygen alternately from external auxiliary oxygen sources such as VGL (variable gas/liquid) storage, whereby said system is capable of supplying breathing oxygen at controlled high flow rates and at controlled temperature and pressure for an extended period of time by use of either on board oxygen storage or external oxygen sources;

the vaporizer provision comprising dual independent sets of vaporizers that allows an operator of the system to switch between said external auxiliary oxygen sources, with use of one of the sets of vaporizers for each auxiliary oxygen source;

said system permitting filling/refilling of the on board LOX source when receiving oxygen from external auxiliary oxygen source such as VGL source, while at the same time supplying continuous breathing oxygen output to patients.

2. A mass oxygen distribution system as set forth in claim 1, the heat exchanger provision comprising a dual coil heat exchanger such that heat exchanger frost build-up does not interrupt supply of oxygen.

3. A mass oxygen distribution system as set forth in claim 1 wherein while a first set of the vaporizers is being used, it grows colder in use;

and as is does so, the second set of the vaporizers is warming up and becoming ready to be used again for warming cold, gaseous oxygen for patient use, and wherein frost build-up on one set of vaporizers does not interrupt operation as the other set of vaporizers thereby to achieve continuous operation and safe redundancy.

4. A mass oxygen distribution system as set forth in claim 3 wherein at least one of the sets of vaporizers is used for vaporizing liquid oxygen from the on board LOX source when the mobile unit is operated to provide oxygen from the pressurized vessel instead of the auxiliary sources.

5. A mass oxygen distribution system as set forth in claim 1 wherein said mobile unit includes audible and visual warning alarm system within the enclosure for alerting an operator user of a possibility of an undesirable condition of oxygen flow to patients.

6. A mass oxygen distribution system as set forth in claim 5 wherein said warning alarm system is a battery-operated microprocessor alarm system responsive to undesirable change in pressure or temperature of oxygen flow to patients.

7. A mass oxygen distribution system as set forth in claim 5 wherein said warning alarm system is operative to warn the operator to reduce oxygen flow from the system if gas temperature drops below a predetermined value, so as to allow the operator to cause the outlet temperature to rise, whereby to protect patients from oxygen that is too cold.

8. A mass oxygen distribution system as set forth in claim 5 wherein said warning alarm system is operative to warn the operator in the event of reducing oxygen delivery pressure, so as to alert the operator to need for changing to an auxiliary oxygen source, or to switch between different auxiliary oxygen sources.