Safety syringe with needle
First Claim
Patent Images
1. A safety syringe, comprising:
- a barrel having a plunger end, and an opposite end cap end;
a carriage within the barrel, the carriage having a radial base, and a carriage wall extending axially from the radial base;
an inward lip at one end of the carriage wall distal to the radial base;
an end cap having a plug engaging the barrel at the end cap end, the plug having a cylindrical sidewall;
a retainer adjacent to the cylindrical sidewall of the plug;
a front wall at an end of the retainer opposite the plug;
a pair of moveable locking elements located on opposite sides of the retainer;
a spring abutting the carriage; and
a needle attaching to the carriage.
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Accused Products
Abstract
A multi-use safety syringe has a retractable needle that retracts only when the user wants to retract the needle. The safety syringe has an internal moveable carriage that locks to an end cap with releasable locking elements. The safety syringe guards against premature retraction of the needle by requiring the simultaneous release of two releasable locking elements by the user. When the locking elements are released, the carriage is released. The released carriage slides backward within the barrel, retracting the needle within the barrel.
28 Citations
17 Claims
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1. A safety syringe, comprising:
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a barrel having a plunger end, and an opposite end cap end; a carriage within the barrel, the carriage having a radial base, and a carriage wall extending axially from the radial base; an inward lip at one end of the carriage wall distal to the radial base; an end cap having a plug engaging the barrel at the end cap end, the plug having a cylindrical sidewall; a retainer adjacent to the cylindrical sidewall of the plug; a front wall at an end of the retainer opposite the plug; a pair of moveable locking elements located on opposite sides of the retainer; a spring abutting the carriage; and a needle attaching to the carriage. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9)
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10. A safety syringe, comprising:
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a barrel having a plunger end, and an opposite end cap end; a plunger within the barrel; an end cap having a plug engaging the barrel at the end cap end, the plug having a cylindrical sidewall; a carriage within the barrel between the plunger and the end cap, the carriage having a radial base, and a carriage wall extending axially from the radial base; an inward lip at one end of the carriage wall distal to the radial base; a retainer adjacent to the cylindrical sidewall of the plug; a front wall at an end of the retainer opposite the plug; a pair of moveable locking elements located on opposite sides of the retainer and cooperatively engaging the inward lip of the carriage wall; a compressed spring abutting the carriage and the end cap; and a needle extending from the carriage and through the end cap. - View Dependent Claims (11, 12, 13, 14, 15, 16, 17)
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Specification