Biological precision screw pump
AssigneeCenter for Advanced Science and Technology Incubation, Ltd.
InventorsYotaro Hatamura, Masayuki Nakao, Takenori Okusa
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Abstract
The present invention provides a suction and injection pump capable of transferring a sufficient amount of viscous liquid even with a very thin suction and injection pipe, thereby enabling suction or injection of a viscous liquid while minimizing invasion into a human body. A pump according to the present invention effectively sucks or injects a viscous liquid by housing a very thin rotor in a cylindrical needle and positively transferring the liquid based on the mechanical configuration of the rotor. The configuration of the present invention reduces the diameter of a pipe while minimizing invasion into a human body.
Claims21
A needle-shaped precision screw pump of a very small diameter for injecting or ejecting a liquid into or from a biological tissue comprising a cylindrical thin needle and a rotor housed in said needle for rotation along an axial direction thereof, said rotor comprising a plurality of filaments twisted together.
A precision screw pump in an instrument for injecting or ejecting a liquid into or from a biological tissue, comprising a cylindrical thin needle having an introduction port at one end and a discharge port at the other end, a cylinder connected to one end of the needle and having a larger diameter than the needle, a rotor housed in said needle for rotation along an axial direction thereof, and a driver housed in said cylinder and connected to one end of said rotor for rotating the rotor, wherein
- said rotor comprises a plurality of filaments twisted together and is rotated in synchronism with the rotation of said driver to transfer a liquid through said thin needle from said introduction port to said discharge port.
A rotor for a screw pump comprising a plurality of filaments twisted together wherein said filaments are coated with an adhesive and said rotor has a screw angle set between about 15° and 35° relative to a rotational center axis of said rotor.
A method for producing a screw pump rotor including a plurality of adhesive-coated filaments, the method comprising:
- providing a plurality of filaments;
- coating an adhesive on the plurality of filaments;
- twisting the plurality of filaments together;
- and
- curing the adhesive to form the screw pump rotor.
A biological liquid injection and ejection instrument comprising a micro screw pump comprising a thin cylindrical hollow needle and a rotor housed in said needle for rotation along an axial direction thereof, said rotor comprising a plurality of filaments twisted together.
A biological liquid injection and ejection instrument comprising a micro screw pump comprising a thin cylindrical hollow needle and a rotor housed in said needle for rotation along an axial direction thereof, said hollow needle having a small diameter in proportion to a diameter of said rotor.
A needle-shaped precision screw pump of a very small diameter for injecting or ejecting a liquid into or from a biological tissue comprising a cylindrical thin needle and a rotor housed in said needle for rotation along an axial direction thereof, said cylindrical thin needle having a small diameter in proportion to a diameter of the rotor.
A precision screw pump in an instrument for injecting or ejecting a liquid into or from a biological tissue, comprising:
- a cylindrical thin needle having an introduction port at one end and a discharge port at the other end;
- a cylinder connected to one end of the needle and having a larger diameter than said needle;
- a rotor housed in said needle for rotation along an axial direction thereof;
- and
- a driver housed in said cylinder and connected to one end of said rotor;
- wherein said cylindrical thin needle has a small diameter in proportion to a diameter of said rotor and said rotor is rotated in synchronism with the rotation of said driver to transfer a liquid through said needle from said introduction port to said discharge port.
Dependencies are inferred from the claim text.