Injection device
First Claim
Patent Images
1. An injection device, comprising:
- a housing having a proximal end and a distal end, the housing having a distal opening, and a first opening in a side of the housing between the proximal and distal ends;
a propellant disposed inside the housing and spaced from the distal end;
a piston having a first cavity disposed inside the housing between the distal end and the propellant; and
a hollow sleeve configured to mate with the piston, the sleeve having a second cavity.
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Accused Products
Abstract
An injection device includes a housing having a proximal end and a distal end, the housing defining a distal opening, and a first opening in a side of the housing and between the proximal and distal ends; a propellant disposed inside the housing and spaced from the distal end; and a movable member disposed inside the housing and between the distal end and the propellant, wherein the propellant is in fluid communication with the movable member and the first opening.
186 Citations
23 Claims
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1. An injection device, comprising:
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a housing having a proximal end and a distal end, the housing having a distal opening, and a first opening in a side of the housing between the proximal and distal ends;
a propellant disposed inside the housing and spaced from the distal end;
a piston having a first cavity disposed inside the housing between the distal end and the propellant; and
a hollow sleeve configured to mate with the piston, the sleeve having a second cavity. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10)
a button at the proximal end of the housing; a battery inside the housing and adjacent to the button;
electrical leads in electrical communication with the battery; and
a wire in electrical communication with the electrical leads, the wire configured to trigger the propellant.
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6. The device of claim 1, wherein the distal opening of the housing is configured to mate with a proximal end of a syringe.
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7. The device of claim 6, wherein the syringe comprises a plunger, and the piston is configured to move the plunger in a distal direction.
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8. The device of claim 1, wherein the propellant comprises a chemical pyrotechnic material.
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9. The device of claim 1, wherein the housing is composed of a plurality of detachable housings.
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10. The device of claim 1, wherein the device is needleless injection device.
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11. An injection device, comprising:
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a housing having a proximal end and a distal end, the housing defining a distal opening, and a first opening in a side of the housing and between the proximal and distal ends;
a propellant disposed inside the housing and spaced from the distal end;
a sleeve disposed inside the housing and between the distal end and the propellant, the sleeve defining a second opening and a first cavity, the second opening and the first cavity in fluid communication with the propellant; and
a piston mateable with the sleeve and movable in a distal direction, the piston defining a third opening alignable with the second opening, wherein the propellant is in fluid communication with the first opening when the second and third openings are aligned. - View Dependent Claims (12, 13, 14, 15, 16, 17, 18, 19, 20, 21, 22, 23)
a button at the proximal end of the housing; a battery inside the housing and adjacent to the button;
electrical leads in electrical communication with the battery; and
a wire in electrical communication with the electrical leads, the wire configured to trigger the propellant.
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19. The device of claim 11, wherein the housing further defines an elongate passageway between the first opening and the third opening.
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20. The device of claim 11, wherein the propellant comprises a chemical pyrotechnic material.
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21. The device of claim 20, further comprising a filter between the propellant and the first cavity.
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22. The device of claim 11, wherein the housing is composed of a plurality of detachable housings.
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23. The device of claim 11, wherein the device is a needleless injection device.
Specification