US 11,304,875 B2Granted

Piercing part for a medical infusion system

AssigneeB. Braun Melsungen AG

InventorsJürgen Fuchs, Christof Schlitt, Siegbert Vial

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Abstract

A piercing part for a medical infusion system includes a housing with a piercing mandrel, a fluid channel and a ventilation channel with a first channel portion extending at least substantially parallel to the fluid channel and with a second channel portion diverted towards an outside of the housing and to which an air filter element and a fluid shut-off member are assigned. A drip chamber can include a piercing part. The piercing part can be produced by an injection molding tool. The second channel portion in the housing is oriented parallel to the first channel portion and open towards an inside of the housing. An open region of the channel portion is closed by a separately produced closure part. The piercing part can be used with a medical infusion system.

Claims11

Dependent claims

A piercing part for a medical infusion system, the piercing part comprising a housing which has a piercing mandrel and which has a fluid channel and also a ventilation channel, the ventilation channel comprising a first channel portion extending at least substantially parallel to the fluid channel, the ventilation channel further comprising a second channel portion which is diverted towards an outside of the housing and through a cylindrical wall inside the housing, the cylindrical wall containing an air filter element and a fluid shut-off member, the second channel portion being oriented parallel to the first channel portion, the cylindrical wall having an inner wall and forming an open region that faces towards an inside of the housing, the open region being closed by a separately produced closure part, the closure part comprising a lid with a peripheral edge region bearing with force-fit engagement against the inner wall of the cylindrical wall to seal off the second channel portion from the inside of the housing, the fluid shut-off member comprising a hollow cylinder having a cylinder wall and a cylinder axis surrounded by the cylinder wall, the cylinder axis extending longitudinally through a center of the cylinder wall, and the fluid channel defining a second axis extending longitudinally through a center of the fluid channel, the second axis being parallel to and laterally offset from the cylinder axis, with the second axis being outside of the hollow cylinder.

A piercing part for a medical infusion system, the piercing part comprising a housing which has a piercing mandrel and which has a fluid channel and also a ventilation channel with a first channel portion extending at least substantially parallel to the fluid channel and with a second channel portion which is diverted towards an outside of the housing and to which an air filter element and a fluid shut-off member are assigned, the second channel portion in the housing oriented parallel to the first channel portion and open towards an inside of the housing, and in that an open region of the second channel portion is closed by a separately produced closure part,

the second channel portion comprising a channel outlet to an outside of the housing,
the fluid shut-off member comprising a non-return valve having a membrane body, the fluid shut-off member comprising a non-return valve having a membrane body,
the fluid shut-off member comprising a hollow cylinder having a cylinder wall and a cylinder axis surrounded by the cylinder wall, the cylinder axis extending longitudinally through a center of the cylinder wall, the fluid channel defining a second axis extending longitudinally through a center of the fluid channel, the second axis being parallel to and laterally offset form the cylinder axis, with the second axis being outside of the hollow cylinder,
the membrane body having a wall comprising a first end and a second end opposite the first end, the second end having an elastically deformable bottom and an opening extending along a circumference of the membrane body in a radial plane above the bottom,
the wall forming a hinge in the radial plane that allows the bottom to pivot relative to the wall to an open position in which the opening connects the second channel portion and the first channel portion in fluid communication,
the open position of the bottom allowing an air stream to flow from outside the housing, through the second channel portion and into the first channel portion to equalize pressure when the piercing mandrel is pushed into a fluid storage receptacle.

3 more elements

Dependencies are inferred from the claim text.

Facts

Application: 15/935,889Filed 26 Mar 2018
Priority: DE 10 2017 205 250.328 Mar 2017
Published: US 2018/0280237 A14 Oct 2018
Granted: 19 Apr 2022
Term ends: Not estimatedThe source records don’t support an estimate.

Classification6 codes

A61J 1/201
Piercing means: having one piercing end
A61J 1/2075
Venting means: for external venting
A61J 1/2082
Filtering means: for gas filtration
A61M 5/1411
Infusion devices, e.g. infusing by gravity; Blood infusion; Accessories therefor: drip chambers

Family

US 2018/0280237 A1Pre-grant publication · published 4 Oct 2018
US 11,304,875 B2This patent

From the US filing history. Foreign family members aren’t listed.

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