Pump device, respiratory device and method for providing a respiratory gas
AssigneeWeinmann Emergency Medical Technology GmbH + Co. KG
InventorFrank HERRMANN
Life of this patent
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Abstract
A pump device, a respiratory device and a method for providing a respiratory gas. A specially formed rotor and a corresponding pump chamber are used so that an approximately sinusoidal flow of an out-flowing fluid is possible. With the combination of two pump chambers with rotors driven in a 180° phase-shifted manner to one another, an almost constant flow can be created at a common outlet. In addition, the system is designed to be highly dynamic with simultaneously relatively low energy consumption.
Claims16
1-15. (canceled)
A pump device, comprising:
- at least one pump chamber and, for each pump chamber, a rotor arranged in the pump chamber, the at least one pump chamber having an inlet and an outlet so that a fluid can flow into the pump chamber via the inlet and can flow out of the pump chamber via the outlet, wherein the rotor is drivable on an orbital path inside the pump chamber, wherein the rotor and the pump chamber are shaped to match each other so that an approximately sinusoidal profile of the flow of the fluid flowing out of the outlet is effected by movement of the rotor in the pump chamber at a constant speed.
A method for providing respiratory gas, comprising the steps of:
- displacing a rotor in a pump chamber from a 0° angular position, in which the rotor has two contact points, or two contact regions arranged around these contact points, with an inner wall of the pump chamber and consequently ceiling an inlet region and an outlet region relative to a remainder of the pump chamber, in a direction of movement of the rotor on an orbital path, into a position in which the rotor and the inner wall of the pump chamber have precisely one contact point, or one contact region arranged around the contact point;
- separating a pressure space in front of the rotor in the direction of movement and a suction space behind the rotor in the direction of movement by the contact point of the rotor and the inner wall of the pump chamber;
- drawing respiratory gas from the inlet into the suction space;
- and delivering the respiratory gas from the pressure space via the outlet by continuous displacement of the rotor in the pump chamber, wherein the method steps are implemented in a sequence phase-shifted by 180° with a second rotor in a second pump chamber so that, when the rotors circulate on the respective orbital paths inside the respective pump chamber at a constant running speed, an optimally smooth flow profile of the respiratory gas is achieved at a common outlet.
Dependencies are inferred from the claim text.