Split sleeve safety syringe
First Claim
1. A medical device, comprisinga syringe means having proximal and distal ends and a generally elongate barrel section extending therebetween,an elongate and hollow needle having a distal needle point thereon operatively connected to said distal end of said barrel section,a locating ring operatively connected to said distal end of said barrel section and including a body section and an outwardly extending tab member extending from said body section of said locating ring,an elongate sleeve member having circumferentially closed proximal and distal ends, said sleeve member adapted to be longitudinally movable over said barrel section and said locating ring between a retracted position wherein said needle point is exposed and an extended position wherein said sleeve member protects said needle point,said sleeve member including an elongate slot having proximal and distal ends, said elongate slot extending between said proximal and distal ends of said sleeve member and wherein said tab member of said locating ring extends therein to slidably retain said sleeve member about said barrel section and said locating ring, anda first perpendicular slot located near the proximal end of said elongate slot and said first perpendicular slot is adapted to receive said tab member therein and retain said sleeve member in said extended position wherein said needle point is protected when said sleeve member is rotated about said barrel section.
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0 Petitions
Accused Products
Abstract
A safety syringe including a conventional syringe, a locating ring and an elongate and tubular sleeve wherein the locating ring includes an outwardly extending projecting tab thereon which extends outwardly from the distal end of the syringe to engage an elongate slot having closed distal and proximal ends on the elongate sleeve to allow the sleeve to be movable between a retracted position wherein a needle on the syringe is exposed and a pair of extended positions wherein the needle is enclosed by the sleeve. The sleeve is releasably retained in one of the extended positions and irreversibly retained in the other extended position upon rotational movement of the projecting tab into one or the other of a pair of perpendicular slots on the sleeve.
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Citations
20 Claims
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1. A medical device, comprising
a syringe means having proximal and distal ends and a generally elongate barrel section extending therebetween, an elongate and hollow needle having a distal needle point thereon operatively connected to said distal end of said barrel section, a locating ring operatively connected to said distal end of said barrel section and including a body section and an outwardly extending tab member extending from said body section of said locating ring, an elongate sleeve member having circumferentially closed proximal and distal ends, said sleeve member adapted to be longitudinally movable over said barrel section and said locating ring between a retracted position wherein said needle point is exposed and an extended position wherein said sleeve member protects said needle point, said sleeve member including an elongate slot having proximal and distal ends, said elongate slot extending between said proximal and distal ends of said sleeve member and wherein said tab member of said locating ring extends therein to slidably retain said sleeve member about said barrel section and said locating ring, and a first perpendicular slot located near the proximal end of said elongate slot and said first perpendicular slot is adapted to receive said tab member therein and retain said sleeve member in said extended position wherein said needle point is protected when said sleeve member is rotated about said barrel section.
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8. A safety syringe, comprising:
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a syringe having proximal and distal ends and a generally elongate barrel section extending therebetween, an elongate and hollow needle having a distal needle point thereon operatively connected to said distal end of said barrel section, a locating ring having a body section and tab means thereon, said locating ring being operatively connected to said distal end of said barrel section and wherein said tab means extends radially outwardly from said body section of said locating ring, an elongate and tubular sleeve member having proximal and distal ends, said sleeve member being adapted to be longitudinally movable over said barrel section and said locating ring between a retracted position wherein said sleeve member is adjacent to said barrel section and an extended position wherein said sleeve member protects said needle point, an elongate slot longitudinally oriented along said sleeve member, said slot extending between said proximal and distal ends of said sleeve member and being adapted to slidably receive said tab means therein, said elongate slot having a proximal end located distal to said proximal end of said sleeve member and a distal end located proximal to said distal end of said sleeve member, a retaining ridge adapted to extend into said elongate slot near said distal end thereof to releasably contact said tab means and retain said sleeve member in said retracted position, and an expansion slot adjacent to said retaining ridge to enable said sleeve member to be rotated about said barrel section so that said tab means slidably passes beyond said retaining ridge as said sleeve member is moved from said retracted position to said extended position - View Dependent Claims (9, 10, 11)
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12. A safety syringe comprising
a tubular member having proximal and distal ends and a generally elongate barrel section extending therebetween, an elongate and hollow needle having a distal needle point thereon said needle being adapted to be operatively connected to said distal end of said barrel section, a cylindrical skirt member extending distally from said distal end of said barrel section, said skirt member being adapted to receive a portion of said needle therein, a locating ring including a body section having an outer surface and an outwardly extending projecting member extending therefrom, said locating ring being operatively connected to said skirt member on said distal end of said barrel section, an elongate and tubular sleeve member having proximal and distal ends, said sleeve member being adapted to be longitudinally slidable over said barrel section and said locating ring between a retracted position wherein said sleeve member is adjacent to said barrel section and said locating ring so that said needle point is exposed and an extended position wherein said sleeve member protects said needle point, an elongate slot extending lengthwise along said sleeve member and including proximal and distal ends positioned near said proximal and distal ends of said sleeve member and wherein said projecting member is adjacent to said distal end of said elongate slot when said sleeve member is in said retracted position and adjacent to said proximal end of said elongate slot when said sleeve member is in said extended position, and a first perpendicular slot located near said proximal end of said elongate slot and said first perpendicular slots being adapted to receive said projecting member therein upon rotational movement of said sleeve member about said barrel section.
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16. A safety syringe comprising
a syringe member having proximal and distal ends, a generally elongate and tubular barrel section therebetween and a longitudinally slidable plunger means therein, an elongate and hollow needle member having a needle hub and a distal needle point thereon, said needle hub being adapted to be operatively connected to said distal end of said barrel section, a cylindrical locating ring having a body section and a radially outwardly extending projecting tab thereon, said locating ring being adapted to be fixedly mounted on said distal end of said syringe member and adjacent said needle hub, an elongate and tubular sleeve member having proximal and distal ends thereon, said sleeve member being adapted to be longitudinally slidable over said barrel section and said locating ring between a needle point exposing retracted position and first and second extended positions wherein said needle point is protected, an elongate and generally rectangularly-shaped slot means extending lengthwise along said sleeve member, said slot means including a distal end located proximally of said distal end of said sleeve member and a proximal end located distally of said proximal end of said sleeve member wherein said projecting member is movable between said distal and proximal ends of said slot means as said sleeve member is moved between said retracted and extended positions, a generally wedge-shaped retaining ridge extending into said slot means near the distal end thereof, an expansion slot oriented generally parallel to said slot means and adjacent to said retaining ridge wherein said retaining ridge and said expansion slot cooperate to releasably retain said projecting tab distally of said retaining ridge when said sleeve member is in said retraced position, first and second perpendicular slots operatively located near said proximal end of said slot means, said first and second perpendicular slots being oriented generally parallel to each other and adapted to receive said projecting means therein upon rotational movement of said sleeve member about said barrel section when said sleeve member is moved to said first and second extended positions, and a locking means operatively positioned in one of said first and second perpendicular slots to irreversibly retain said projecting means in one of said first and second perpendicular slots when said sleeve member is in said second extended position.
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19. A method of assembling a safety syringe comprising the steps of
inserting a locating ring having a depressible outwardly extending projecting means thereon into an elongate and cylindrical sleeve member by depressing the projecting means until the projecting means on the locating ring is aligned with an elongate slot having closed distal and proximal ends on the sleeve member, releasing the projecting means so that the projecting means is slidably retained within the distal and proximal ends of the elongate slot, and sliding the proximal end of the sleeve member over the distal end of a syringe barrel until the inner surface of the locating ring contacts and operationally engages a luer skirt on the distal end of the syringe barrel.
Specification