Cassette for a hidden injection needle
First Claim
1. A system for injecting a fluid medicament into a patient which comprises:
- a motorized drive mechanism;
a hypodermic syringe with a needle, wherein the syringe is pre-filled with the fluid medicament and the syringe includes a stopper for expelling the medicament from the syringe through the needle;
a cassette for receiving and holding the hypodermic syringe, the syringe movable relative to the cassette between a first position and a second position, the cassette comprising an inner sleeve for holding the syringe, an outer sleeve for supporting the inner sleeve, the inner sleeve moveable relative to the outer sleeve between the first position and the second position, and a detent formed by the outer sleeve for retaining the syringe in the first position; and
a bar operated by the motorized drive mechanism for releasing the detent;
wherein the needle is concealed inside the cassette in the first position, and wherein the needle extends from the cassette in the second position for injection of the medicament.
1 Assignment
0 Petitions
Accused Products
Abstract
A system for injecting a fluid medicament into a patient includes a drive mechanism, and a cassette loaded with a pre-filled hypodermic syringe. When the cassette is loaded, the syringe is held firmly inside and the cassette can be selectively engaged with the drive mechanism. The drive mechanism has two motors. A first motor initially moves the hypodermic syringe from a position inside the cassette where its needle is concealed, to a position where the needle extends from the cassette for insertion into a patient for an injection. With the needle inserted, a second motor pushes the syringe stopper to expel a fluid medicament from the syringe. After an injection, the first motor withdraws the syringe back into concealment inside the cassette, to again firmly hold the syringe on the cassette. The cassette and syringe, in combination, can then be removed from the drive mechanism and discarded.
380 Citations
22 Claims
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1. A system for injecting a fluid medicament into a patient which comprises:
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a motorized drive mechanism; a hypodermic syringe with a needle, wherein the syringe is pre-filled with the fluid medicament and the syringe includes a stopper for expelling the medicament from the syringe through the needle; a cassette for receiving and holding the hypodermic syringe, the syringe movable relative to the cassette between a first position and a second position, the cassette comprising an inner sleeve for holding the syringe, an outer sleeve for supporting the inner sleeve, the inner sleeve moveable relative to the outer sleeve between the first position and the second position, and a detent formed by the outer sleeve for retaining the syringe in the first position; and a bar operated by the motorized drive mechanism for releasing the detent; wherein the needle is concealed inside the cassette in the first position, and wherein the needle extends from the cassette in the second position for injection of the medicament. - View Dependent Claims (2, 3, 4, 5)
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6. A system for injecting a fluid medicament into a patient, the system comprising:
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a hypodermic syringe, wherein the syringe has a needle and a stopper for expelling the medicament from the syringe through the needle, and wherein the syringe is engaged with a cassette to conceal the needle of the syringe, the cassette comprising an inner sleeve for holding the syringe, an outer sleeve for supporting the inner sleeve, and a detent formed by the outer sleeve for retaining the syringe to conceal the needle; a housing removeable engaging the cassette while the needle of the syringe is in a concealed position inside the cassette; a first motor mounted on the housing for moving the syringe and its needle on the cassette from the concealed position to an extended position where the needle is exposed; and a second motor mounted on the housing for pushing the stopper to expel the medicament from the syringe while the syringe needle is in the extended position; and a bar operated by the first motor for releasing the detent.
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7. A system for injecting a fluid medicament, the system comprising:
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a disposable cassette containing a syringe prefilled with a fluid medicament, the cassette comprising a detent for retaining the syringe in a needle concealed position; and an injector comprising a cradle and a motorized drive mechanism, the cradle for receiving and holding the cassette and the motorized drive mechanism for releasing the detent and for causing the syringe to move in the cassette between the needle concealed position and a needle extended position. - View Dependent Claims (8, 9, 10, 11, 12, 13, 14)
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15. A disposable cassette for use with an injector, the cassette comprising:
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an outer sleeve; an inner sleeve movable within the outer sleeve between first and second positions; a syringe held by the inner sleeve, the syringe prefilled with a fluid medicament, wherein the syringe is in a needle concealed position when the inner sleeve is in the first position and the syringe is in a needle extended position when the inner sleeve is moved to the second position by a motorized drive mechanism of the injector; and a detent formed by the outer sleeve for retaining the inner sleeve in the first position, the detent being releasable by the motorized drive mechanism. - View Dependent Claims (16, 17, 18, 19)
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20. A system for injecting a fluid medicament comprising:
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a cassette for concealing a hypodermic syringe, the syringe movable relative to the cassette, the syringe having a needle that is concealed inside the cassette if the syringe is in a first position relative to the cassette, the needle extending from the cassette if the syringe is in a second position relative to the cassette, the cassette comprising a detent for preventing movement of the syringe relative to the cassette; and a motorized drive mechanism, wherein the motorized drive mechanism is operative for releasing the detent, and wherein the cassette comprises; an inner sleeve for holding the syringe; and an outer sleeve for supporting the inner sleeve, the inner sleeve moveable relative to the outer sleeve between the first position and &
the second position, wherein the detent is formed by the outer sleeve. - View Dependent Claims (21, 22)
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Specification