Automatic injection device
First Claim
1. An automatic injection device for providing a subcutaneous injection of a substance into a user, comprising:
- a housing having an open first end and a second end;
a syringe movably disposed in the housing, the syringe including a barrel portion for holding the substance, a hollow needle in fluid communication with the barrel portion for ejecting the substance from the syringe, and a bung for sealing the barrel portion and selectively applying pressure to the substance to force the substance through the hollow needle;
a syringe actuation component for first moving the syringe towards the first end of the housing such that the needle projects from the first end and for subsequently applying pressure to the bung, the syringe actuation component including a pressurizer, at a first end of the syringe actuation component, for selectively applying pressure to the bung, a rod comprising a compressible portion projecting from the rod along at least a portion of a length of the rod, the compressible portion having a first expanded position prior to entering the barrel portion of the syringe and a second compressed position for initiating movement of the bung and a flange between a second end of the syringe actuation component and the compressible portion; and
a first biasing mechanism for biasing the syringe actuation component towards the open first end of the housing, the first biasing mechanism disposed between the flange of the syringe actuation component and the second end of the housing.
4 Assignments
0 Petitions
Accused Products
Abstract
An automatic injection device for providing a subcutaneous injection is disclosed. The device includes a syringe movably disposed in a housing and including a barrel portion, a needle and a bung for sealing the barrel portion. The device includes a plunger for moving the syringe towards a first open end of the housing such that the needle projects from the first end and subsequently applying pressure to the bung. The plunger includes a rod connected at a first end to the bung, a compressible expanded central portion, and a flange between a second end of the rod and the central portion. The device includes a biasing mechanism for biasing the plunger towards the first open end of the housing, the biasing mechanism disposed about the second end of the rod between the flange and the second end of the housing.
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Citations
43 Claims
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1. An automatic injection device for providing a subcutaneous injection of a substance into a user, comprising:
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a housing having an open first end and a second end; a syringe movably disposed in the housing, the syringe including a barrel portion for holding the substance, a hollow needle in fluid communication with the barrel portion for ejecting the substance from the syringe, and a bung for sealing the barrel portion and selectively applying pressure to the substance to force the substance through the hollow needle; a syringe actuation component for first moving the syringe towards the first end of the housing such that the needle projects from the first end and for subsequently applying pressure to the bung, the syringe actuation component including a pressurizer, at a first end of the syringe actuation component, for selectively applying pressure to the bung, a rod comprising a compressible portion projecting from the rod along at least a portion of a length of the rod, the compressible portion having a first expanded position prior to entering the barrel portion of the syringe and a second compressed position for initiating movement of the bung and a flange between a second end of the syringe actuation component and the compressible portion; and a first biasing mechanism for biasing the syringe actuation component towards the open first end of the housing, the first biasing mechanism disposed between the flange of the syringe actuation component and the second end of the housing. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 21, 22, 23, 24, 25, 26, 27, 28, 29, 30, 31, 32, 33, 34)
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17. An automatic injection device for providing a subcutaneous injection of a substance into a user, comprising:
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a housing having an open first end and a second end; a plunger including a rod configured to be connected or adjacent at a first end to a bung of a syringe, a compressible portion projecting from the rod along at least a portion of a length of the rod, the compressible portion having a first expanded inactivated position and a second compressed activated position for initiating movement of the bung, and a flange between a second end of the rod and the compressible portion; and a biasing mechanism for biasing the plunger towards the open first end of the housing, the biasing mechanism disposed about the second end of the rod between the flange and the second end of the housing. - View Dependent Claims (18, 19, 20)
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35. An automatic injection device for providing a subcutaneous injection of a substance into a user, comprising:
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a housing comprising; an open first end, a second end, a window disposed in a side wall for viewing the interior of the housing, and an indicator that aligns with the window when the substance has been injected into the user; a syringe movably disposed in the housing, the syringe comprising; a barrel portion for holding the substance, a hollow needle in fluid communication with the barrel portion for ejecting the substance from the syringe, and a bung for sealing the barrel portion and selectively applying pressure to the substance to force the substance through the hollow needle; a syringe actuation component for first moving the syringe towards the open first end of the housing such that the needle projects from the open first end and for subsequently applying pressure to the bung, the syringe actuation component comprising; a rod comprising; an upper solid portion having a first end, a lower solid portion having a second end operable to move the bung and to transmit an expulsion force thereto, a projecting portion projecting from the rod along at least a portion of a length of the rod, the projecting portion comprising two or more flexible elbows on either side of a central void provided between the upper and lower solid portions and aligned along a central axis of the rod, the projecting portion having a first expanded position prior to entering the barrel portion of the syringe in which the flexible elbows project radially outwardly to form the central void, and the projecting portion having a second compressed position for applying the second end of the lower solid portion to the bung in which the flexible elbows are compressed radially inwardly toward the central void, and a flange disposed between the first end of the upper solid portion of the rod and the projecting portion of the rod; a first biasing mechanism for biasing the syringe actuation component towards the open first end of the housing, the first biasing mechanism disposed between the flange of the syringe actuation component and the second end of the housing; a second biasing mechanism for holding the syringe retracted in the housing until the first biasing mechanism is released; and a first removable cap for covering the open first end of the housing or the second end of the housing. - View Dependent Claims (36, 37, 38, 39, 40, 41, 42, 43)
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Specification