A safety device for a needle is provided. The device includes a spring biased sheath which acts to cover the needle before and after use. The safety device also includes a spring biased lock which is operable to lock the sheath in a safe position unless the biasing force of the lock is countered by a user.
1. A safety device comprising:
a needle fitting configured to mount with a needle;
a sheath having a proximal end disposed with the needle fitting and a distal end, the sheath including elongated arms that extend between the proximal end and the distal end,
a mid portion of the arms being pivotable towards and away from the needle to facilitate movement of the distal end of the sheath from a first position spaced from a distal end of the needle to a second position disposed adjacent a distal end of the needle;
a resilient member engaging the arms to facilitate extension of the distal end of the sheath to the second position,
wherein in the second position, the mid portion of the arms are in opposing relation with each other;
wherein each of the elongated arms includes a front half and a back half, each back half being pivotally connected to its respective front half; and
wherein the proximal end of the sheath is hingedly connected to a back member.
2. A safety device according to claim 1 , wherein the back member is configured to attach to a needle receiving member.
3. A safety device according to claim 2 , wherein the back member is configured to receive a needle-luer.
4. The safety device according to claim 1 , wherein in the second position, the mid portion of each of the arms is positioned to be substantially abutting a needle.
5. The safety device according to claim 1 , wherein when the sheath is in the second position, the sheath is configured such that a force applied to the distal end of the sheath urges the mid portion of each of the arms towards the other to maintain the sheath in the second position.
6. The safety device according to claim 5 , wherein each of the arms is semi-elliptical and tapers radially inwardly towards the mid portion.
7. The safety device according to claim 1 , wherein each of the arms is semi-elliptical and tapers radially inwardly towards the mid portion.
8. The safety device according to claim 1 , wherein each of the arms includes an edge, the edges of each of the arms facing the edge of the other arm.
9. The safety device according to claim 8 , wherein at least a portion of the edges of each of the arms abut in the second position.
10. The safety device according to claim 9 , wherein the edge of each of the arms includes rounded interlocking teeth.
11. The safety device according to claim 8 , wherein the edge of each of the arms has a depth of about 5 percent of the overall length of the device.
12. The safety device according to claim 8 , wherein the edges are flat.
13. The safety device according to claim 1 , wherein in the second position, the mid portion of each of the arms is positioned to be substantially abutting a needle and the proximal and distal ends of the arms are spaced radially outwardly of the mid portion.
14. A safety device comprising:
a needle fitting configured to mount with a needle;
a sheath having a proximal end disposed with the needle fitting and a distal end, the sheath including elongated arms that extend between the proximal end and the distal end,
a mid portion of the arms being pivotable towards and away from the needle to facilitate movement of the distal end of the sheath from a first position spaced from a distal end of the needle to a second position disposed adjacent a distal end of the needle;
a resilient member engaging the arms to facilitate extension of the distal end of the sheath to the second position,
wherein in the second position, the mid portion of the arms are in opposing relation with each other; and
further including a priming button positioned adjacent the proximal end of the sheath, the priming button being movable to move the elongated arms from their second position to their first position;
wherein the priming button includes a first half formed on a first elongated arm of the elongated arms and a second half formed on a second elongated arm of the elongated arms.