Resuscitator having directional control valve with internal "PEEP" adjustment valve

• US 5,109,840 A
• Filed: 02/14/1991
• Issued: 05/05/1992
• Est. Priority Date: 02/14/1991
• Status: Expired due to Fees

• Current Assignee: Specialty Packaging Licensing Co. (O-I Glass, Inc.)
• Original Assignee: Specialty Packaging Licensing Co. (O-I Glass, Inc.)
• Inventors: Daleiden, John P.
• Primary Examiner(s): Burr, Edgar S.
• Assistant Examiner(s): Asher, Kimberly L.
• Application Number:
  US07/655,642
• Time in Patent Office: 446 Days
• Field of Search: 128/204.18, 128/204.28, 128/205.11, 128/205.13, 128/205.14, 128/205.24, 128/204.25, 128/205.23
• US Class Current: 128/205.13
• CPC Class Codes: A61M 16/0078 Breathing bags
• CPC Class Codes: A61M 16/0084 self-reinflatable by elasticity, e.g. resuscitation squeeze bags
• CPC Class Codes: A61M 16/208 Non-controlled one-way valves, e.g. exhalation, check, pop-off non-rebreathing valves
• CPC Class Codes: A61M 16/209 Relief valves

Abstract

The directional control valve housing in a squeeze bag resuscitator includes a duck-bill element which permits inhaling from the bag as the duck-bill opens, and spontaneous exhaling as the periphery of duck-bill is pushed away from its seat. An adjustable spring urges the periphery against its seat with force established by the PEEP setting. The housing is in two screwed-together parts and the PEEP setting is effected by screwing the parts inward or outward.

Claims

1. A resuscitator having an internal PEEP adjustment and comprising:

(a) flexible squeeze bag means having a hollow interior and first and second connections thereinto,

(b) a one-way gas inlet valve fastened to said second connection, said inlet valve permitting gas flow into said hollow interior through said second connection,

(c) a directional control valve assembly communicating with the said first connection and comprising

1) a valve housing comprising a first cylindrical part secured to said first connection and having a partial floor thereacross, the floor being formed with a perpendicular threaded sleeve concentric with the first cylindrical part, and a second domed part telescopingly related to the first part, the second domed part having associated therewith a second threaded sleeve disposed axially thereof, the first and second threaded sleeves being threadedly engaged,

2) a tubular patient port joined to said domed second part of said valve housing and adapted to be coupled in gas flow communication to a patient, said patient port extending into said valve housing and including a tubular extension formed concentric with said valve housing and having a circular end seat and a unitary flexible duck-billed diaphragm valve, an exit passage being formed between said second domed part and said extension and having an outlet port;

said duck-billed diaphragm valve including a flexible outer normally flat peripheral portion, and an inner duck-bill portion, said peripheral portion being secured to said second domed part and being adjacent to and engageable with said circular end seat of said tubular extension, said duck-bill portion extending into said tubular extension; and

3) a spring means disposed compressively between the floor of the first cylindrical part of the housing and an annular portion of the duck-billed diaphragm valve opposite the seat, and urging the duck-billed diaphragm valve to seat against the circular end seat,

4) said first and second threaded sleeves comprising PEEP setting means for adjusting the PEEP exhaled against, said sleeves permitting relative rotation of the first and second parts of the housing of said control valve assembly,

whereby relatively rotating the parts of the valve housing to move the floor toward or away from the seat puts more or less compression on the spring to adjust the PEEP exhaled against.

2. A resuscitator as claimed in claim 1 wherein the first and second parts are formed with relative external graduations to indicate PEEP settings as the two parts are turned relatively.

3. A resuscitator as claimed in claim 1 wherein the first and second connections are at opposite ends of the bag means.

4. A resuscitator as claimed in claim 1 wherein the second sleeve and the domed second part are two separate elements secured together and held from relative rotation by having interfitting longitudinal ridges thereon.

5. A resuscitator as claimed in claim 1 wherein the spring means includes a spiral spring and a spool-like element having a central opening and an annular well which receives an end of the spiral spring adjacent the annular portion.