Controlled release structure for attaching medical devices
AssigneeBecton, Dickinson and Company
InventorsRichard Caizza, William Grady
Life of this patent
Estimating the term…
Abstract
A medical device for use with a fluid transfer device includes a hub having an open proximal end with a frusto-conically-shaped cavity therein, a distal end and a passageway therethrough. The cavity is part of the passageway. A release element in the passageway of the hub is positioned to block fluid-tight engagement of the frusto-conically-shaped tip with the cavity of the hub. Structure is provided to release at least part of the release element, upon application of a proximally directed force on the hub, to allow the abrupt fluid-tight engagement of the tip and the cavity in the hub.
Claims19
A medical device for use with a fluid transfer device having a frusto-conically shaped tip comprising:
- a hub having an open proximal end with a frusto-conically shaped cavity therein, a distal end and a passageway therethrough, said cavity being part of said passageway;
- and
- a release element in said passageway of said hub positioned to block fluid-tight engagement of said frusto-conically shaped tip with said cavity of said hub, said release element including a distal end in said passageway and a proximal end including a proximally directed axial beam, said beam having a free end adapted to contact the distal end of said frusto-conically shaped tip to block fluid-tight engagement of said tip and said hub;
- wherein said beam buckles upon application of a proximally directed force on said hub, to allow the abrupt fluid-tight engagement of said tip and said cavity in said hub.
A medical device for use with a fluid transfer device having a frusto-conically-shaped tip comprising:
- a needle cannula having a proximal end, a distal end and a lumen therethrough;
- a hub having an open proximal end with a frusto-conically shaped cavity therein, a distal end and a passageway therethrough, said cavity being part of said passageway, said proximal end of said needle cannula being joined to said distal end of said hub so that said lumen is in fluid communication with said passageway;
- a release element in said passageway of said hub positioned to block fluid-tight engagement of said frusto-conically shaped tip with said cavity of said hub, said release element including a distal end in said passageway and a proximal end including a proximally directed axial beam, said beam having a free end adapted to contact the distal end of said frusto-conically shaped tip to block fluid-tight engagement of said tip and said hub;
- wherein said beam buckles upon application of a proximally directed force or equal or greater than 0.5 kg (1.1 pounds) on said hub, to allow the abrupt fluid-tight engagement of said tip and said cavity in said hub.
Dependencies are inferred from the claim text.