VALVE FOR ARTIFICIAL RESPIRATION APPARATUS

• US 3,556,122 A
• Filed: 03/26/1969
• Issued: 01/19/1971
• Est. Priority Date: 06/15/1964
• Status: Expired due to Term

• Current Assignee: Laerdal Asmund Sigurd
• Original Assignee: Laerdal Asmund Sigurd
• Inventors: LAERDAL ASMUND SIGURD
• Application Number:
  US04/812,557
• Time in Patent Office: 664 Days
• US Class Current: 137/102
• CPC Class Codes: A61M 16/208 Non-controlled one-way valves, e.g. exhalation, check, pop-off non-rebreathing valves
• CPC Class Codes: A62B 9/02 Valves non-return valves mounted in breathing masks or helmets A62B18/10
• CPC Class Codes: F16K 15/1401 having a plurality of independent valve members
• CPC Class Codes: F16K 15/144 the closure elements being fixed along all or a part of their periphery
• CPC Class Codes: F16K 15/147 the closure elements having specially formed slits or being of an elongated easily collapsible form
• CPC Class Codes: Y10T 137/2544 Supply and exhaust type
• CPC Class Codes: Y10T 137/7842 Diverse types
• CPC Class Codes: Y10T 137/7882 Having exit lip
• CPC Class Codes: Y10T 137/8359 Inspection means

Abstract

A valve for an artificial respiration apparatus formed by a tubular member and wall members extending radially therefrom and forming an annular chamber at one end of the tubular member. A diaphragm is secured within the annular chamber and extends across the tubular member, within the tubular member the diaphragm has a wedge-shaped configuration with a slot at its end. Exhaust openings are provided through the wall members. When the valve is used in administering oxygen to a person, the slit in the diaphragm opens permitting the oxygen to flow therethrough. However, when the person exhales, the slit in the diaphragm is closed and the exhaled air passes between the diaphragm and the tubular member into the annular chamber and then out through the exhaust openings. The exhaust openings are provided with covers at the exterior of the valve so that air can only pass outwardly.

Claims

1. A valve for an artificial respiration apparatus for supplying air or oxygen into the lungs of a patient, comprising an axially extending tubular member forming a passageway extending between a first opening at one end of said tubular member and a second opening at the opposite end thereof, a first wall member connected to and extending radially outwardly from said tubular member at said one end thereof, a flat second wall member disposed in spaced parallel relationship with and secured to said first wall member and forming therewith an annular chamber laterally encircling said one end of said tubular member and in communication with the passageway therethrough, said second wall member located adjacent to and axially outwardly from the first opening of said tubular member, said second wall member extending transversely across said one end of said tubular member and having at least one centrally located aperture therethrough for admitting air or oxygen into the valve for flow through said passageway, an annular valve seat formed by the juncture of said tubular member and said first wall member, a resilient diaphragm extending transversely across said passageway through said tubular member, said diaphragm having an inactive position and a plurality of valving positions within said passageway, said diaphragm comprising a radially outer annular shaped first section positioned within said annular chamber between the parallel surfaces of said first and second wall members and secured at its radially outer periphery between said first and second wall members and arranged to engage said valve seat in one of said valving positions of said diaphragm and a second section disposed radially inwardly of and attached to said first section and positioned across said passageway in axial alignment with said aperture in said second wall member, at least a portion of the surface of said second section arranged to form a normally closed orifice when said diaphragm is in the inactive position and said second section arranged in one said valving position to be displaced in the direction of said second opening from the inactive position for opening said orifice and in another said valving position to be displaced in the opposite direction from the inactive position for closing said orifice and in such position said first section of said diaphragm is in contact with and supported by said second wall member, exhaust openings in said first wall member communicating between said annular chamber and the exterior of said valve, said diaphragm being responsive to fluid pressure differentials in said chamber for movement between the different valving positions, whereby in the passage of air or oxygen through said aperture in said second wall member to said second opening said diaphragm contacts the valve seat closing off the passage between said second opening and said exhaust openings and opening the orifice in said diaphragm for providing flow of air or oxygen to and through the second opening in said tubular member, and if the flow through the valve is reversed entering said second opening the orifice in said diaphragm is closed and the reverse flow passes through the passageway between the side of said diaphragm facing said second opening and said tubular member and entering into said annular chamber and exiting through the exhaust openings in said first wall member.

2. A valve, as set forth in claim 1, wherein said second section of said diaphragm has a wedge-shaped configuration secured about its radially outer periphery to the inner periphery of said first section and extending therefrom axially through said passageway toward said second opening with said orifice therein located at the end of said second section adjacent said second opening.

3. A valve, as set forth in claim 1, wherein means are arranged for closing said exhaust openings against the flow of fluid into said chamber from the exterior of said valve but permitting reverse flow through saiD exhaust openings.

4. A valve as set forth in claim 1, wherein said first and second wall members are formed of a transparent thermoplastic material whereby the disposition of the diaphragm within the chamber formed by said wall members can be viewed from the exterior of said valve.

5. A valve as set forth in claim 1, wherein means are secured to said first and second wall members for attaching an elastic bag of an artificial respiration apparatus thereto for supplying air or oxygen to the aperture through said second wall member for its passage through the valve.

6. A valve as set forth in claim 1, wherein said first and second wall members are threaded into engagement with one another.

7. A valve, as set forth in claim 1, wherein said annular valve seat comprises a protuberance extending in the axial direction of said passageway from said first wall member toward said second wall member.

8. A valve, as set forth in claim 7, wherein said protuberance being positioned adjacent said one end of said passageway and extending therefrom toward said diaphragm.

9. A valve, as set forth in claim 7, wherein the radially inner surface of said protuberance being coextensive with the inner surface of said passageway.