Air filter for medicinal liquid injection and medicinal liquid injection apparatus including the same
OwnerYong Hyun Kiminventor
Life of this patent
Estimating the term…
Abstract
An air filter device for medicinal liquid injection in which a medicinal liquid channel is formed includes: a housing having an air passage that diverges from the medicinal liquid channel and is connected to outside; a hydrophilic boundary filter disposed in the medicinal liquid channel and dividing the medicinal liquid channel into a first channel at an upstream side and a second channel at a downstream side; and a hydrophobic air-passing filter disposed at a boundary between the air passage and the first channel.
Claims20
An air filter device for medicinal liquid injection in which a medicinal liquid channel is formed, the air filter device comprising:
- a housing having an air passage that diverges from the medicinal liquid channel and is connected to outside;
- a hydrophilic boundary filter disposed in the medicinal liquid channel and dividing the medicinal liquid channel into a first channel at an upstream side and a second channel at a downstream side;
- and
- a hydrophobic air-passing filter disposed at a boundary between the air passage and the first channel.
A medicinal liquid injection apparatus comprising:
- a pumping device configured to press a medicinal liquid;
- an extension tube in which the medicinal liquid flowing out of the pumping device by pressure applied by the pumping device flows;
- and
- an air filter device in which a medicinal liquid channel is formed connected to the extension tube,
- wherein the air filter device includes:
- a housing having an air passage connecting a middle portion of the medicinal liquid channel to outside;
- a hydrophilic boundary filter disposed in the medicinal liquid channel and dividing the medicinal liquid channel into a first channel at an upstream side and a second channel at a downstream side;
- and
- a hydrophobic air-passing filter disposed at a boundary between the air passage and the first channel.
Dependencies are inferred from the claim text.