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.
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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