Valved needle assembly
AssigneeNipro Corporation
InventorsHiroyuki Nakagami, Shingo Sakamoto
Life of this patent
Estimating the term…
Abstract
A valved needle assembly including a needle hub provided to a proximal end side of a hollow needle, and a valve member incorporated therein for blocking communication with the hollow needle. A protrusion protrudes from a distal end side toward a proximal end side inside the needle hub and the valve member blocks the proximal end side of the protrusion inside the needle hub. A central valve part of the valve member having a slit moves toward the protrusion such that the slit is opened and placed in communication by the protrusion. The central valve part includes a distal end tubular part and a proximal end tubular part extending from its outer circumferential portion toward the distal end side and the proximal end side respectively.
Claims20
A valved needle assembly comprising:
- a hollow needle;
- a needle hub provided to a proximal end side of the hollow needle;
- and
- a valve member incorporated inside the needle hub and blocking communication with the hollow needle, wherein
- a protrusion is provided inside the needle hub and protrudes from a distal end side toward a proximal end side, and the valve member blocks the proximal end side of the protrusion inside the needle hub,
- a central valve part of the valve member positioned in opposition to the protrusion and having a slit is configured to be moved toward the protrusion such that the slit is opened and placed in a communicating state by the protrusion,
- the central valve part is provided with a distal end tubular part extending from an outer circumferential portion thereof toward the distal end side, and a proximal end tubular part extending from the outer circumferential portion thereof toward the proximal end side, and
- the valve member includes an outer circumferential guiding projection projecting radially outward from an outer circumferential surface of the central valve part and configured to move in contact with an inner circumferential surface of the needle hub.
A valved needle assembly comprising:
- a hollow needle;
- a needle hub provided to a proximal end side of the hollow needle;
- and
- a valve member incorporated inside the needle hub and blocking communication with the hollow needle, wherein
- a protrusion is provided inside the needle hub and protrudes from a distal end side toward a proximal end side, and the valve member blocks an inside of the needle hub,
- a central valve part of the valve member positioned in opposition to the protrusion and having a slit is configured to be moved toward the protrusion such that the slit is opened and placed in a communicating state by the protrusion,
- the central valve part is provided with a proximal end tubular part extending from an outer circumferential portion thereof toward the proximal end side, and a compression force is exerted on an outer circumferential surface of the central valve part due to contact against the needle hub, and
- the valve member includes an outer circumferential guiding projection projecting radially outward from the outer circumferential surface of the central valve part and configured to move in contact with an inner circumferential surface of the needle hub.
A valved needle assembly comprising:
- a hollow needle;
- a needle hub provided to a proximal end side of the hollow needle;
- and
- a valve member incorporated inside the needle hub and blocking communication with the hollow needle, wherein
- a protrusion is provided inside the needle hub and protrudes from a distal end side toward a proximal end side, and the valve member blocks an inside of the needle hub,
- a central valve part of the valve member positioned in opposition to the protrusion and having a slit is configured to be moved toward the protrusion such that the slit is opened and placed in a communicating state by the protrusion,
- the central valve part is provided with a distal end tubular part extending from an outer circumferential portion thereof toward the distal end side, and a proximal end tubular part extending from the outer circumferential portion thereof toward the proximal end side,
- the distal end tubular part extends as far as a distal end of the inside of the needle hub, and the distal end tubular part includes a sealing face that is in contact with a distal end outer circumferential surface of the protrusion about an entire circumference, and
- the valve member includes an outer circumferential guiding projection projecting radially outward from an outer circumferential surface of the central valve part and configured to move in contact with an inner circumferential surface of the needle hub.
Dependencies are inferred from the claim text.