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US 7,223,258 B2Granted
Safety shield assembly
AssigneeBecton, Dickinson and Company
InventorJamieson W. M. Crawford
Life of this patent
Estimating the term…
Abstract
The present invention is a safety shield assembly having a shield and a collar for connecting the shield to a fluid handling device whereby the shield may be pivoted with respect to the collar. Preferably, the safety shield assembly may be used with a needle assembly, an intravenous infusion set a syringe, a catheter or other fluid handling devices or assemblies that contain piercing elements.
Claims20
A safety needle assembly comprising
- a needle hub with proximal and distal ends and
- a passage extending between said ends,
- a needle cannula mounted to said passage of said needle hub and having a pointed distal end projecting beyond said distal end of said hub,
- a shield having proximal and distal ends, said proximal end of said shield being hingedly mounted to said hub for rotation from a first position where said shield is spaced from said needle cannula to a second position where said shield substantially surrounds said needle cannula, said shield comprising
- a top wall and opposed first and second sidewalls extending from said top wall, said sidewall having bottom edges remote from said top wall,
- a resiliently deflectable cannula finger lock projecting from said first sidewall angularly toward said top wall, and
- a substantially rigid cannula shelf lock projecting from one of said sidewalls in a direction toward the opposed sidewall, said cannula shelf lock having a bottom edge sloped toward said top wall and a flat top edge spaced from said top wall such that said bottom and top edges intersect at a corner, wherein said top edge of said cannula shelf lock comprises a concave region facing said top wall for trapping said needle cannula, whereby the cannula finger lock deflects during rotation of said shield toward said second position for trapping said needle cannula, and whereby said cannula shelf lock generates deflection of said needle cannula during said rotation of said shield to said second position, such that said needle cannula is trapped below said top wall and above said cannula finger lock and said cannula shelf lock.
4 more elements
A safety needle assembly comprising
- a needle hub with proximal and distal ends and
- a passage extending between said ends,
- a chevron-shaped projection formed externally on said hub, said chevron-shaped projection including a central point facing distally on said hub and
- a pair of rounded ends facing proximally on said hub,
- a needle cannula mounted to said passage of said needle hub and having a pointed distal end projecting beyond said distal end of said hub,
- a shield having proximal and distal ends, said proximal end of said shield being hingedly mounted to said hub for rotation from a first position where said shield is spaced from said needle cannula to a second position where said shield substantially surrounds said needle cannula, said shield comprising
- a top wall and opposed first and second sidewalls extending from said top wall,
- a resiliently deflectable cannula finger lock projecting from said first sidewall angularly toward said top wall,
- a substantially rigid cannula shelf lock projecting from one of said sidewalls in a direction toward the opposed sidewall, said cannula shelf lock having a bottom edge sloped toward said top wall and a flat top edge spaced from said top wall such that said bottom and top edges intersect at a corner, wherein said top edge of said cannula shelf lock comprises a concave region facing said top wall for trapping said needle cannula,
- rounded ears formed on said shield for engaging said rounded proximal ends of said chevron-shaped projection when said shield is rotated toward said second position,
- whereby said cannula finger lock latch deflects during rotation of said shield toward said second position, and whereby said cannula shelf lock generates deflection of said needle cannula during said rotation of said shield to said second position, such that said needle cannula is trapped below said top wall and above said cannula finger lock and said cannula shelf lock, said rounded ears and said rounded proximal ends of said chevron-shaped projection providing audible and tactile indication of said shield reaching said second position.
8 more elements
Dependencies are inferred from the claim text.