Title:
ニードルアセンブリ
Document Type and Number:
Japanese Patent JP4478498
Kind Code:
B2
Abstract:
A medical device having a releasable retaining includes needle cannula (21) connected to a hub (31) having an open proximal end (32) with a frusto-conically shaped cavity (33) therein. The cavity is part of a passageway (35) through the hub (31) which is in fluid communication with the lumen (24) of the needle cannula (21). A retaining element (41) is releasably connected to the hub (31). The hub (31) includes an aperture (43) and at least one protuberance (44) projecting into the aperture (43) for engaging the frusto-conically shaped tip (57) of a fluid delivery device (51). The protuberance (44) is shaped to offer less resistance to hub (31) movement in a direction of engagement than in a direction of disengagement with the tip (57). The retaining element (41) is connected to the hub (31) so that when the hub (31) is engaged to the tip (57), the force required to disengage the retaining element (41) from the tip (57) is greater than the force required to disengage the retaining element (41) from the hub (31).
Inventors:
Richard Jay Caitzer
Application Number:
JP2004128936A
Publication Date:
June 09, 2010
Filing Date:
April 23, 2004
Export Citation:
Assignee:
BECTON, DICKINSON AND COMPANY
International Classes:
A61M5/158; A61M5/178; A61M5/32; A61M5/34; A61B17/20
Domestic Patent References:
| JP8732A | ||||
| JP200388587A | ||||
| JP7148176A | ||||
| JP10113392A |
Foreign References:
| US4369781 | ||||
| WO2003011356A1 | ||||
| US4676530 | ||||
| FR1321493A1 |
Attorney, Agent or Firm:
Yoshikazu Tani
Kazuo Abe
Kazuo Abe