Double and single acting piston ventilators
First Claim
1. A single acting piston ventilator system for providing breathing gas to a patient airway, comprising:
- a source of said breathing gas for providing a supply flow of said breathing gas;
a fixed volume piston cylinder having a first end and a second end, a first inlet connecting said first end of said piston cylinder in fluid communication with said source of breathing gas for receiving said supply flow of breathing gas, a second inlet connecting said second end of said piston cylinder in fluid communication with said source of breathing gas for receiving said supply flow of breathing gas, said first and second inlets being connected in fluid communication, and an outlet connected to said first end of said piston cylinder for delivering mixed gas to the patient airway;
a single inlet valve, said inlet valve located in said first inlet for allowing flow of said mixed gas into said piston cylinder;
outlet valve means in said outlet for allowing a flow of said mixed gas to the patient airway;
a reciprocating piston disposed within said piston cylinder and moveable between said first and second ends of said piston cylinder; and
means for moving said piston between said first and second ends.
1 Assignment
0 Petitions
Accused Products
Abstract
The piston ventilators include a double acting reciprocating piston, in which the piston motion delivering breathing gas to a patient receiving assistance from the ventilator simultaneously draws in breathing gas from a source of breathing gas, and a single acting piston ventilator, in which only the delivery end of the cylinder is provided with inlet and exhaust valves. In the double acting piston ventilator, breathing gas is supplied to both ends of the piston cylinder through two intake valves, and exhausting breathing gas through two exhaust valves. Both intake valves of the cylinder are ducted to the breathing gas supply, and the two exhaust valves of the cylinder are ducted to a gas delivery limb of the ventilator connected to the patient'"'"'s airway.
172 Citations
12 Claims
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1. A single acting piston ventilator system for providing breathing gas to a patient airway, comprising:
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a source of said breathing gas for providing a supply flow of said breathing gas; a fixed volume piston cylinder having a first end and a second end, a first inlet connecting said first end of said piston cylinder in fluid communication with said source of breathing gas for receiving said supply flow of breathing gas, a second inlet connecting said second end of said piston cylinder in fluid communication with said source of breathing gas for receiving said supply flow of breathing gas, said first and second inlets being connected in fluid communication, and an outlet connected to said first end of said piston cylinder for delivering mixed gas to the patient airway; a single inlet valve, said inlet valve located in said first inlet for allowing flow of said mixed gas into said piston cylinder; outlet valve means in said outlet for allowing a flow of said mixed gas to the patient airway; a reciprocating piston disposed within said piston cylinder and moveable between said first and second ends of said piston cylinder; and means for moving said piston between said first and second ends. - View Dependent Claims (2, 3, 4, 5, 6)
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7. A single acting piston ventilator system for providing breathing gas to a patient airway, consisting essentially of:
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a source of said breathing gas for providing a supply flow of said breathing gas; a fixed volume piston cylinder having a first end and a second end, a first inlet connecting said first end of said piston cylinder in fluid communication with said source of breathing gas for receiving said supply flow of breathing gas, a second inlet connecting said second end of said piston cylinder in fluid communication with said source of breathing gas for receiving said supply flow of breathing gas, said first and second inlets being connected in fluid communication, and an outlet connected to said first end of said piston cylinder for delivering mixed gas to the patient airway; inlet valve means in said first inlet for allowing flow of said mixed gas into said piston cylinder; outlet valve means in said outlet for allowing a flow of said mixed gas to the patient airway; a reciprocating piston disposed within said piston cylinder and moveable between said first and second ends of said piston cylinder; and means for moving said piston between said first and second ends. - View Dependent Claims (8, 9)
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10. A single acting piston ventilator system for providing breathing gas to a patient airway, consisting essentially of:
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a source of said breathing gas for providing a supply flow of said breathing gas; a fixed volume piston cylinder having a first end and a second end, a first inlet connecting said first end of said piston cylinder in fluid communication with said source of breathing gas for receiving said supply flow of breathing gas, a second inlet connecting said second end of said piston cylinder in fluid communication with said source of breathing gas for receiving said supply flow of breathing gas, said first and second inlets being connected in fluid communication, and an outlet connected to said first end of said piston cylinder for delivering mixed gas to the patient airway; inlet valve means in said first inlet for allowing flow of said mixed gas into said piston cylinder; outlet valve means in said outlet for allowing a flow of said mixed gas to the patient airway; a reciprocating piston disposed within said piston cylinder and moveable between said first and second ends of said piston cylinder; means for moving said piston between said first and second ends; and control means for controlling said means for moving said piston for controlling pressure and flow of breathing gas supplied by the piston cylinder to the patient airway. - View Dependent Claims (11, 12)
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Specification