Squeeze bag resuscitator with air-oxygen proportionating control
AssigneeRobertshaw Controls Company
InventorDonald Clayton Fabish
Life of this patent
Estimating the term…
Abstract
There is disclosed a squeeze bag resuscitating device having an inhalation-exhalation valve with a gas supply to the squeeze bag that includes a proportionating valve which receives separate supplies of air and oxygen and which has a fixedly adjustable proportionating control member whereby the proportons of oxygen in the gas mixture can be fixedly adjusted to any of a plurality of preselected values. In a preferred embodiment, the proportionating valve is detachably mounted on the resuscitating device and can be interchanged with a demand valve such as that described in my prior U.S. Pat. No. 3,795,257.
Claims17
A squeeze bag resuscitating device comprising an assembly of a resuscitating valve housing having a squeeze bag connected thereto and containing an inhalation-exhalation valve means with mask attachment means for connection of said valve housing to a breathing mask and the like and gas inlet means including check valve means within said housing to close said gas inlet means under positive pressure in said squeeze bag, proportionating valve means detachably secured to said resuscitating valve housing and having means to receive separate flows of oxygen and air thereto, proportionating means to blend said oxygen and air flows to a preselected proportional gas mixture and discharge means to discharge said gas mixture to said gas inlet means of said valve housing said gas inlet means defining a socket, said discharge means defining an extension complementally and removably fitted within said socket.
A breathing apparatus comprising:
- (a) a resuscitating valve housing having a central chamber with inhalation, exhalation, squeeze bag and gas inlet port means;
- (b) inhalation-exhalation valve means mounted in said housing to discharge breathing gas from said central chamber through said inhalation port means during inhalation operation and to vent exhaled gas to said exhalation port means during exhalation operation;
- (c) squeeze bag means;
- (d) means to connect said squeeze bag means in open communication with said central chamber through said squeeze bag port means;
- (e) check valve means to close said gas inlet port means under positive pressure in said central chamber;
- (f) proportionating valve means having a proportionating valve housing with an interior chamber and discharge port means and first and second gas inlet port means, means to supply oxygen and air, respectively to said first and second gas inlet port means and orifice means within said interior chamber between said discharge port means and said gas inlet ports to prepare a mixture of oxygen and air of preselected proportions;
- (g) means to detachably secure said proportionating valve housing to said resuscitating valve housing with said discharge port means of said proportionating valve housing in communication to said gas inlet port means of said resuscitating valve housing;
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- (h) said detachable means comprises said gas inlet port means defining a socket, said discharge port means defining an extension complementally and removably fitted within said socket.
A squeeze bag resuscitating device comprising:
- (a) a valve housing having a central chamber;
- (b) a first neck on the external wall of said valve housing having a through passageway;
- (c) a squeeze bag attached to said first neck with its interior communicating with said central chamber by said through passageway;
- (d) a second neck projecting from an external wall of said housing, for removable attachment of a face mask, with a second through passageway therein communicating with said central chamber;
- (e) gas inlet means including check valve means within said housing to close said gas inlet means under positive pressure in said squeeze bag;
- (f) inhalation-exhalation valve means operatively supported within said housing between said central chamber and said second through passageway;
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- (g) receptacle means comprising a cylindrical well within a wall of said resuscitating valve housing having tapered sidewalls to removably receive a tapered neck of a gas supply valve means in open communication to said gas inlet means whereby a preselected unit of oxygen proportionating and oxygen demand valves can be interchangeably attached to said device.
Dependencies are inferred from the claim text.