Patent ID: 9561326
Date: 2017-02-07
CPC Classifications: A61J,A61M

Claim:
1. A coupling device that provides a first medical device with a fluid port, said coupling device comprising at least one connection site that receives and connects a second medical device, a piercing member having a longitudinal axis A, a piercing tip portion and a piercing tip, said piercing member being arranged in fluid communication with said at least one connection site and adapted to pierce a membrane on said first medical device that provides said first medical device with said fluid port, an outer portion of the piercing member being tapered in a direction towards an end of the piercing tip; said piercing member comprises a first fluid channel and a second fluid channel, said first fluid channel and said second fluid channel having a first opening at said piercing tip portion, wherein said first opening of said first fluid channel has a first cut surface having a rim on an opposing first outer wall, and said first opening of said second fluid channel has a second cut surface defined by a rim of an opposing second outer wall, the rim of the first fluid channel transcends to a separation wall and the rim of the second fluid channel transcends to the piercing tip; wherein said first fluid channel and said second fluid channel are separated by a fluid channel separation wall, said fluid channel separation wall having a convex surface portion, with respect to said longitudinal axis A, said convex surface portion faces said first fluid channel at said piercing tip portion wherein said first fluid channel separation wall further comprises a concave portion, with respect to said longitudinal axis A, said concave portion facing said second fluid channel at said piercing tip portion, wherein said concave portion extends fully along said fluid channel separation wall; wherein a distance of a crest of the rim of the first fluid channel to the piercing tip is between 6-15 mm and a distance of a crest of the rim of the second fluid channel to the piercing tip is between 3-5 mm, wherein said first fluid channel has a cross-sectional area twice as large as the cross-sectional area of the second fluid channel.