Intradermal injector
First Claim
1. An injection device, comprising:
- a chamber configured for containing a substance to be injected;
a needle having a sharp distal end and a sharp proximal end, the needle being operatively associated with the chamber and configured to deliver the substance to an injection site, the needle having a retracted position and an extended position in which the needle is disposed for penetrating a patient at the injection site and injecting the substance;
a resilient needle cap covering the sharp distal end in the retracted position and disposed and configured such that the cap is resiliently deformed with the needle in the extended position and biasing the needle from the extended position towards the retracted position; and
a stopper sealing the chamber, the stopper covering the sharp proximal end and separating the needle from the chamber in the retracted position and disposed and configured such that the stopper is pierced by the needle with the needle in the extended position to place the chamber in fluid communication with the needle.
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Accused Products
Abstract
An injection device that comprises a chamber configured for containing a substance to be injected and a needle operatively associated with the chamber and having a length sufficient to deliver the substance to an intradermal injection site. A collar surrounds the needle, defining a collar cavity. The collar also has a peripheral forward skin-contacting surface that surrounds and is radially spaced from the needle and injection site by an area that is sufficiently large to allow a patient'"'"'s skin to move into the collar cavity to properly position the needle for intradermal delivery of the substance to the injection site to allow spread of the injected substance under the skin while inhibiting or preventing backpressure within the skin from forcing the substance out through the injection site.
657 Citations
21 Claims
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1. An injection device, comprising:
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a chamber configured for containing a substance to be injected; a needle having a sharp distal end and a sharp proximal end, the needle being operatively associated with the chamber and configured to deliver the substance to an injection site, the needle having a retracted position and an extended position in which the needle is disposed for penetrating a patient at the injection site and injecting the substance; a resilient needle cap covering the sharp distal end in the retracted position and disposed and configured such that the cap is resiliently deformed with the needle in the extended position and biasing the needle from the extended position towards the retracted position; and a stopper sealing the chamber, the stopper covering the sharp proximal end and separating the needle from the chamber in the retracted position and disposed and configured such that the stopper is pierced by the needle with the needle in the extended position to place the chamber in fluid communication with the needle. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14)
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15. An injection device, comprising:
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a chamber configured to contain a substance to be injected; a needle having a distal end and a proximal end, the needle being operatively associated with the chamber and configured to deliver the substance to an injection site, the needle configured to move from a retracted position to an extended position in which the needle is configured to inject the substance into a patient at the injection site; a needle cap covering the distal end of the needle in the retracted position, the needle cap configured to be resiliently deformed when the needle is in the extended position to bias the needle towards the retracted position; and a stopper sealing the chamber, the stopper configured to cover the proximal end of the needle and separate the needle from the chamber when the needle is in the retracted position, the stopper configured to be pierced by the needle when the needle moves from the retracted position to the extended position to place the chamber in fluid communication with the needle. - View Dependent Claims (16, 17, 18, 19, 20, 21)
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Specification