Spring actuated delivery system
First Claim
1. A spring actuated delivery system comprising:
- a dispensing member having an inner surface and an outer surface, the inner surface defining a cavity for receiving a quantity of a substance, the dispensing member having a tapered end;
a plunger engaged with the inner surface of the dispensing member, the plunger capable of sliding in the cavity of the dispensing member, the plunger fluidly sealed to the inner surface of the dispensing member;
a spring connected to the plunger via a shaft; and
a lock mechanism engaging the shaft, the lock mechanism holding the shaft in a first position such that the spring is in a compressed state;
wherein when the lock mechanism is released, the spring extends thereby driving the shaft and connected plunger in a direction toward the tapered end of the dispensing member and expelling the substance from the dispensing member into an eye, and further the plunger engages the tapered end of the dispensing member.
3 Assignments
0 Petitions
Accused Products
Abstract
A disposable drug delivery device has a dispensing needle, a plunger, a spring, a shaft, and a lock mechanism. The plunger is engaged with the inner surface of the dispensing needle, is capable of sliding in the cavity of the dispensing needle, and is fluidly sealed to the inner surface of the dispensing needle. The spring is connected to the plunger via a shaft. The lock mechanism holds the shaft in a first position such that the spring is in a compressed state. When the lock mechanism releases the shaft, the spring extends providing a force that moves the shaft and connected plunger in a direction toward the tapered end of the dispensing needle thereby expelling the drug from the dispensing needle into an eye. The spring also provides a retaining force so that the plunger is retained in an extended position against the tapered end of the dispensing needle.
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Citations
18 Claims
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1. A spring actuated delivery system comprising:
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a dispensing member having an inner surface and an outer surface, the inner surface defining a cavity for receiving a quantity of a substance, the dispensing member having a tapered end; a plunger engaged with the inner surface of the dispensing member, the plunger capable of sliding in the cavity of the dispensing member, the plunger fluidly sealed to the inner surface of the dispensing member; a spring connected to the plunger via a shaft; and a lock mechanism engaging the shaft, the lock mechanism holding the shaft in a first position such that the spring is in a compressed state; wherein when the lock mechanism is released, the spring extends thereby driving the shaft and connected plunger in a direction toward the tapered end of the dispensing member and expelling the substance from the dispensing member into an eye, and further the plunger engages the tapered end of the dispensing member. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9)
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10. A disposable drug delivery device comprising:
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a dispensing needle having an inner surface and an outer surface, the inner surface defining a cavity for receiving a quantity of a drug, the dispensing member having a tapered end; a plunger engaged with the inner surface of the dispensing needle, the plunger capable of sliding in the cavity of the dispensing needle, the plunger fluidly sealed to the inner surface of the dispensing needle; a spring connected to the plunger via a shaft; and a lock mechanism holding the shaft in a first position such that the spring is in a compressed state; wherein when the lock mechanism releases the shaft, the spring extends providing a force that moves the shaft and connected plunger in a direction toward the tapered end of the dispensing needle thereby expelling the drug from the dispensing needle into an eye; and further wherein the spring provides a retaining force so that the plunger is retained in an extended position engaging the tapered end of the dispensing needle. - View Dependent Claims (11, 12, 13, 14, 15)
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16. A method for delivering a substance into an eye comprising:
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heating the substance to be injected into the eye by heating a dispensing member in contact with the substance; after the substance is heated to an appropriate temperature, enabling a lock mechanism release; releasing a shaft held by the lock mechanism thereby allowing a compressed spring to extend and push a plunger located in the dispensing member to expel the substance from the dispensing member; and retaining the plunger in an extended position by the application of a spring force. - View Dependent Claims (17, 18)
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Specification