Needle point protection sheath
First Claim
1. A medical fluid flow set which comprises a flexible tube having a needle hub at an end thereof, said hub carrying a hollow needle having a point, and being of enlarged transverse dimension relative to said needle;
- a frustoconical protector tube surrounding at least one of said tube, hub, and needle, said frustoconical protector tube having respective larger and smaller ends, the larger tube end facing in the same direction as the needle point, the smaller tube end being proportioned to surround and tightly squeeze against said hub, said tube being of a length to enclose said needle point when the smaller tube end encloses and squeezes said hub, and a closure cap provided for said larger tube end, said frustoconical tube defining a retention member at its smaller tube end to prevent said hub from passing out of said smaller tube end, said retention member comprising a flange having an inwardly facing surface perpendicular to the axis of said tube and an outwardly facing surface defining an acute angle to said tube, whereby a needle hub may be placed into said tube through the smaller tube end, but cannot be removed from the tube though the smaller tube end.
12 Assignments
0 Petitions
Accused Products
Abstract
A needle point protection sheath comprises a protector tube having a bore for receiving a hollow needle plus a needle hub within the bore. The protector tube has a closure cap at one end thereof and has a retention member at the other end to engage an end of the hub, to prevent the hub from passing out of the other tube end. The cap may carry a sleeve having a needle-pierceable wall at its inner end, or a mass of resilient material which is capable of being penetrated by the needle as the cap is closed, to seal the needle tip and thus prevent the spilling of blood residue when a blood collection needle is being enclosed for protection.
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Citations
24 Claims
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1. A medical fluid flow set which comprises a flexible tube having a needle hub at an end thereof, said hub carrying a hollow needle having a point, and being of enlarged transverse dimension relative to said needle;
- a frustoconical protector tube surrounding at least one of said tube, hub, and needle, said frustoconical protector tube having respective larger and smaller ends, the larger tube end facing in the same direction as the needle point, the smaller tube end being proportioned to surround and tightly squeeze against said hub, said tube being of a length to enclose said needle point when the smaller tube end encloses and squeezes said hub, and a closure cap provided for said larger tube end, said frustoconical tube defining a retention member at its smaller tube end to prevent said hub from passing out of said smaller tube end, said retention member comprising a flange having an inwardly facing surface perpendicular to the axis of said tube and an outwardly facing surface defining an acute angle to said tube, whereby a needle hub may be placed into said tube through the smaller tube end, but cannot be removed from the tube though the smaller tube end.
- View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10)
- 11. A needle point protection sheath which comprises a protector tube having a bore for receiving a hollow needle having a point within said bore and a needle hub, said protector tube having a closure cap at one end thereof, and having a retention member at the other end thereof to engage the hub to prevent said hub from passing out of said other tube end, said closure cap carrying a sleeve projecting inwardly of said tube when the cap is closed, said sleeve being closed at an inner end with a needle-pierceable wall, whereby a tip of a needle carried within said tube can pierce said wall to enclose and at least substantially seal the needle point in the sleeve.
- 18. A needle guard carried with a set comprising a medical needle mounted on flexible tubing, said needle having a hub, said guard comprising a protector tube open at both ends with said flexible tubing being capable of extending completely through said protector tube, said protector tube having an interior large enough to receive and enclose said needle and said hub, one end of said protector tube having a retention member for engaging an end of said hub to substantially prevent withdrawal of said needle and hub from the protector tube interior through said one end, said protector tube carrying a closure cap at an end opposed to said one end, said cap carrying a sleeve protecting inwardly of said tube when the cap is closed, said sleeve being closed at an inner end with a needle-pierceable wall, whereby a tip of a needle carried within said tube can pierce said wall to enclose and at least substantially seal the needle point in the sleeve.
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23. A needle point protection sheath which comprises a protector tube having a bore for receiving a hollow needle having a point within said bore and a needle hub, said protection sheath having a retention member at one tube end to engage the hub to prevent said hub from passing out of said one end, said retention member comprising a flange having an inwardly facing surface perpendicular to the axis of said tube and an outwardly facing surface defining an acute angle to said tube, whereby a needle hub may be placed into said tube through said one end, but cannot be removed from the tube through said one end.
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24. A needle guard carried with a set comprising a medical needle mounted on an end of flexible tubing, said needle having a hub, said guard comprising a protector tube open at both ends with said flexible tubing being capable of extending completely through said protector tube, said protector tube having an interior large enough to receive and enclose said needle and said hub, one end of said protector tube having a retention member for engaging said hub to substantially prevent withdrawal of said needle and hub from the protector tube interior through said one end, said retention member comprising a flange having an inwardly facing surface perpendicular to the axis of said tube and an outwardly facing surface defining an acute angle to said tube, whereby said needle hub may be placed into said tube through said first tube end but cannot be removed from the tube through said first tube end.
Specification