Retractable needle assembly
First Claim
1. A retractable safety needle comprising:
- a needle hub having proximal and distal ends and a passage extending between said ends;
a needle cannula having a proximal end, a distal end and a lumen extending therebetween, said proximal end of said needle cannula being securely mounted in said passage at said distal end of said needle hub;
a resiliently deflectable actuator arm extending from said needle hub, an actuator button being formed on said actuator arm and projecting outwardly relative to said needle hub;
a barrel having a proximal end, a distal end and a passage extending between said ends, said needle hub being disposed in said passage of said barrel such that said needle hub, said needle cannula and said actuator arm are moveable relative to said barrel from a distal position where said needle cannula projects distally beyond said barrel and a proximal position wherein said distal end of said needle cannula is disposed in said barrel, said barrel having an actuating opening extending therethrough, said actuator button projecting into said actuating opening and engaging portions of said barrel adjacent said actuating opening when said needle hub is in said distal position, said actuator button being resiliently deflectable out of engagement with said actuating open;
a spring disposed in said barrel and adjacent said needle hub for propelling said needle hub to said proximal position when said actuator button is deflected out of said actuating aperture;
at least one flange projecting inwardly from said barrel to limit proximal movement of said needle hub; and
at least one resiliently deflectable locking finger projecting inwardly from said barrel, said at least one finger being configured to lockingly engage said needle hub when said needle hub reaches said proximal position.
1 Assignment
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Accused Products
Abstract
A fluid collection or infusion set is provided. The set includes flexible tubing with a fitting attached to a proximal end and a needle assembly attached to the distal end. The needle assembly includes a needle hub and a needle cannula secured in the hub. An actuator arm extends proximally and outwardly from the needle hub and has an actuator button at its free end. The needle assembly is disposed in a barrel and can move from a distal position where the needle cannula is exposed to a proximal position where the needle cannula is shielded. A spring is disposed in the barrel for propelling the needle assembly to the proximal position. The barrel includes an actuating aperture that receives the actuator button for locking the spring in a compressed condition. Depression of the actuator button enables the spring to propel the needle assembly into its proximal shielded position.
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Citations
38 Claims
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1. A retractable safety needle comprising:
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a needle hub having proximal and distal ends and a passage extending between said ends; a needle cannula having a proximal end, a distal end and a lumen extending therebetween, said proximal end of said needle cannula being securely mounted in said passage at said distal end of said needle hub; a resiliently deflectable actuator arm extending from said needle hub, an actuator button being formed on said actuator arm and projecting outwardly relative to said needle hub; a barrel having a proximal end, a distal end and a passage extending between said ends, said needle hub being disposed in said passage of said barrel such that said needle hub, said needle cannula and said actuator arm are moveable relative to said barrel from a distal position where said needle cannula projects distally beyond said barrel and a proximal position wherein said distal end of said needle cannula is disposed in said barrel, said barrel having an actuating opening extending therethrough, said actuator button projecting into said actuating opening and engaging portions of said barrel adjacent said actuating opening when said needle hub is in said distal position, said actuator button being resiliently deflectable out of engagement with said actuating open; a spring disposed in said barrel and adjacent said needle hub for propelling said needle hub to said proximal position when said actuator button is deflected out of said actuating aperture; at least one flange projecting inwardly from said barrel to limit proximal movement of said needle hub; and at least one resiliently deflectable locking finger projecting inwardly from said barrel, said at least one finger being configured to lockingly engage said needle hub when said needle hub reaches said proximal position. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16)
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17. A retractable safety needle comprising:
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a needle hub having proximal and distal ends and a passage extending between said ends; a needle cannula having a proximal end, a distal end and a lumen extending therebetween, said proximal end of said needle cannula being securely mounted in said passage at said distal end of said needle hub; a resiliently deflectable actuator arm extending from said needle hub, an actuator button being formed on said actuator arm and projecting outwardly relative to said needle hub; a barrel having a proximal end, a distal end and a passage extending between said ends, said needle hub being disposed in said passage of said barrel such that said needle hub, said needle cannula and said actuator arm are moveable relative to said barrel from a distal position where said needle cannula projects distally beyond said barrel and a proximal position wherein said distal end of said needle cannula is disposed in said barrel, said barrel having an actuating opening extending therethrough, said actuator button projecting into said actuating opening and engaging portions of said barrel adjacent said actuating opening when said needle hub is in said distal position, said actuator button being resiliently deflectable out of engagement with said actuating open; a spring disposed in said barrel and adjacent said needle hub for propelling said needle hub to said proximal position when said actuator button is deflected out of said actuating aperture; and at least one resiliently deflectable locking finger projecting inwardly from said barrel, said at least one finger being configured to deflect to allow said needle hub to reach said proximal position and lockingly engage said needle hub when said needle hub reaches said proximal position. - View Dependent Claims (18, 19, 20, 21, 22, 23, 24, 25, 26, 27)
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28. A retractable safety needle comprising:
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a needle hub having proximal and distal ends and a passage extending between said ends; a needle cannula having a proximal end, a distal end and a lumen extending therebetween, said proximal end of said needle cannula being securely mounted in said passage at said distal end of said needle hub; a resiliently deflectable actuator arm extending from said needle hub, an actuator button being formed on said actuator arm and projecting outwardly relative to said needle hub; a barrel having a proximal end, a distal end and a passage extending between said ends, said needle hub being disposed in said passage of said barrel such that said needle hub, said needle cannula and said actuator arm are moveable relative to said barrel from a distal position where said needle cannula projects distally beyond said barrel and a proximal position wherein said distal end of said needle cannula is disposed in said barrel, said barrel having an actuating opening extending therethrough, said actuator button projecting into said actuating opening and engaging portions of said barrel adjacent said actuating opening when said needle hub is in said distal position, said actuator button being resiliently deflectable out of engagement with said actuating open; a spring disposed in said barrel and adjacent said needle hub for propelling said needle hub to said proximal position when said actuator button is deflected out of said actuating aperture; and at least one resiliently deflectable locking finger projecting inwardly from said barrel, said at least one finger being configured to lockingly engage said needle hub at a location other than said actuator arm to prevent re-exposure of said needle cannula when said needle hub reaches said proximal position. - View Dependent Claims (29, 30, 31, 32, 33, 34, 35, 36, 37, 38)
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Specification