Safety retracting needle for use with syringe
First Claim
1. A safety device for use with a syringe in injecting a substance into a patient or withdrawing a substance from a patient and for thereafter protecting people from contact with portions of the device that have been within the patient;
- said device comprising;
a needle for piercing such a patient and for carrying such a substance into or out from such a patient, said needle having a hollow shaft with at least one sharp end;
a hollow handle adapted to enclose at least the sharp end of the needle beyond reach of such people'"'"'s fingers;
means for establishing communication between such a syringe and the hollow needle, for passage of such a substance between the syringe and the needle;
means for securing the shaft to the handle, with the sharp end projecting from the handle; and
means for releasing the securing means and for substantially permanently retracting the sharp end of the needle into the handle and beyond reach of such people'"'"'s fingers;
said releasing and retracting means being manually actuable by a simple unitary motion, of amplitude that is substantially shorter than the shaft of the needle.
3 Assignments
0 Petitions
Accused Products
Abstract
A hollow needle projects from the "forward" end of a hollow handle. A syringe communicates with the interior of the needle by way of the hollow handle. After use for passing liquid between the syringe and a patient'"'"'s body, the needle is released from the handle and its sharp end retracted into the handle, beyond reach. The handle has an aperture big enough for the needle but not for fingertips. The needle rides in a carrier block that slides inside the handle. Initially the block is secured in the handle against the forward end, with the sharp end of the needle protruding out through the aperture. A manually releasable latch holds the block in this position. The latch includes mutually interfering stop elements on the exterior of the block and interior of the handle. After liquid is injected into or withdrawn from the patient'"'"'s body, the person using the device withdraws the needle from the patient and manually triggers the carrier-block latch by squeezing or rotating one stop element out of engagement with the other. Then a coiled spring drives the block rearward to retract the needle into the handle. At the rear of the handle a stop halts the block and needle to safely confine them within the handle. A standard-size fitting on the rear of the handle permits liquid flow between the patient and a standard syringe with a standard front fitting.
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Citations
44 Claims
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1. A safety device for use with a syringe in injecting a substance into a patient or withdrawing a substance from a patient and for thereafter protecting people from contact with portions of the device that have been within the patient;
- said device comprising;
a needle for piercing such a patient and for carrying such a substance into or out from such a patient, said needle having a hollow shaft with at least one sharp end; a hollow handle adapted to enclose at least the sharp end of the needle beyond reach of such people'"'"'s fingers; means for establishing communication between such a syringe and the hollow needle, for passage of such a substance between the syringe and the needle; means for securing the shaft to the handle, with the sharp end projecting from the handle; and means for releasing the securing means and for substantially permanently retracting the sharp end of the needle into the handle and beyond reach of such people'"'"'s fingers; said releasing and retracting means being manually actuable by a simple unitary motion, of amplitude that is substantially shorter than the shaft of the needle. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20, 21, 22)
- said device comprising;
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23. A safety device for use with a syringe in injecting a substance into a patient or withdrawing a substance from a patient and for thereafter protecting people from contact with portions of the device that have been within the patient;
- said device comprising;
a hollow needle for piercing such patient and for guiding and carrying such a substance into or out from such a patient, said needle having a hollow shaft with at least one sharp end; a hollow handle that defines an aperture which is small compared with such people'"'"'s fingers but large enough for passage of the needle, and that is otherwise adapted to enclose at least the sharp end of the needle; means for establishing communication between such a syringe and the hollow needle, for passage of such a substance between the syringe and the needle; a block fixed to and extending from the needle, and restrained within the handle with the sharp end of the needle projecting out of the handle through the aperture, and adapted for motion within the handle to withdraw the needle into the handle; and a trigger mechanism, actuable from outside the handle for releasing the block, and including positive biasing means for forcibly moving the block within the handle to substantially permanently retract the sharp end of the needle into the handle and beyond reach of such people'"'"'s fingers. - View Dependent Claims (24, 25, 26, 27, 28, 29, 30, 31, 32, 33, 34, 35, 36, 37, 38, 39, 40, 41, 42, 43, 44)
- said device comprising;
Specification