Disposable double pointed injection needle, and an insulin injection system comprising a disposable double pointed injection needle
First Claim
1. A safety pen-needle assembly comprising:
- a. a needle hub;
b. a needle having a cannula having a first portion with a sharpened distal end, the first portion protruding distally from the hub and a second portion protruding proximally from the hub and having an end for piercing a sealable membrane;
c. a sliding cover that slides over the cannula to conceal the sharp end of the first portion of the cannula, the cover being capable of sliding in a proximal direction away from the sharp end thereby exposing the sharp end so that it may be used to penetrate a portion of skin on a patientd. a biasing means for keeping the cover over the sharp end of the first portion unless a force is exerted to slide the cover proximally away from the sharp end of the first portion;
e. a locking means for irreversibly locking the cover over the sharpened end of the first portion after an injection has been administered with the needle;
f. a visual indicating means for visually indicating that the needle has been previously used to administer an injection.
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Accused Products
Abstract
A disposable double pointed injection needle has a needle hub to which a thin needle cannula is permanently fasten and which needle hub can be mounted on to a syringe comprising a dose setting and injection mechanism and a cartridge containing a liquid medicine to be injected subcutaneously into a human body. The needle hub is provided with a safety shield guided on the outside surface of the needle hub. The safety shield is urged in a direction away from the needle hub by a spring located between the needle hub and the safety shield. The safety shield has a number of protrusions guided in guiding tracks on the outside surface of the needle hub. The guiding tracks are designed such that the safety shield during injection is moved towards the needle hub, and after injection is moved away from the needle hub by the spring and locked in an irreversible position where the safety shield covers the needle cannula and prevents accidental needle stick injuries.
150 Citations
2 Claims
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1. A safety pen-needle assembly comprising:
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a. a needle hub; b. a needle having a cannula having a first portion with a sharpened distal end, the first portion protruding distally from the hub and a second portion protruding proximally from the hub and having an end for piercing a sealable membrane; c. a sliding cover that slides over the cannula to conceal the sharp end of the first portion of the cannula, the cover being capable of sliding in a proximal direction away from the sharp end thereby exposing the sharp end so that it may be used to penetrate a portion of skin on a patient d. a biasing means for keeping the cover over the sharp end of the first portion unless a force is exerted to slide the cover proximally away from the sharp end of the first portion; e. a locking means for irreversibly locking the cover over the sharpened end of the first portion after an injection has been administered with the needle; f. a visual indicating means for visually indicating that the needle has been previously used to administer an injection.
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2. An injection needle assembly comprising:
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a. a needle hub; b. a needle cannula mounted in the hub, at least a portion of the cannula protruding distally from the hub and having a sharpened skin piercing end; c. a means for covering and uncovering the sharpened end; d. a means for irreversibly locking the covering means over the sharpened end; e. a means for visually indicating that the covering means is locked over the sharpened end.
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Specification