CARTRIDGE FOR POWDER AND LIQUID DRUG
First Claim
1. A cartridge for holding and mixing a medical product comprising:
- a tubular body having a cylindrical wall with first and second opposing ends, said wall having inner and outer surfaces, said inner surface having a generally constant cross-section along at least a drug mixing area;
a first stopper slidably disposed within said wall between said first and second ends, said first stopper defining a liquid-tight seal with said inner surface and having a front end;
a second stopper slidably disposed within said wall between said first stopper and said first end, said second stopper defining a liquid-tight seal with said inner surface;
a flexible insert disposed at or in proximity to said second end, said insert forming a liquid-tight seal with said wall, said insert having a recess formed therein being complementarily sized and shaped to at least partially nestingly receive said front end of said first stopper; and
,a retainer fixed to said wall at said second end, said retainer having an opening therein for providing access to said insert for piercing by a medical needle, wherein, said insert extends into said retainer and forms a liquid-tight seal across said opening.
2 Assignments
0 Petitions
Accused Products
Abstract
A cartridge or injector for holding and mixing a medical product is provided herein including a tubular body having a cylindrical wall having first and second opposing ends. The wall includes inner and outer surfaces with the inner surface having a generally constant cross-section along at least a drug mixing area. A first stopper is slidably disposed within the wall between the first and second ends, the first stopper defining a liquid-tight seal with the inner surface. A second stopper is slidably disposed within the wall between the first stopper and the first end, the second stopper defining a liquid-tight seal with the inner surface. A flexible insert is disposed at or in proximity to the second end, the insert forming a liquid-tight seal with the wall, the insert being pierceable by a medical needle or other piercing instrument. A rigid retainer is fixed to the wall having an opening therein for providing access to the insert for piercing by a medical needle. The insert extends into the retainer and forms a liquid-tight seal across the opening. Advantageously, with the subject invention, a reconstitution assembly may be provided which has a sufficiently large distal opening during assembly which allows a dry component to be introduced into the device in a dry state.
40 Citations
17 Claims
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1. A cartridge for holding and mixing a medical product comprising:
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a tubular body having a cylindrical wall with first and second opposing ends, said wall having inner and outer surfaces, said inner surface having a generally constant cross-section along at least a drug mixing area; a first stopper slidably disposed within said wall between said first and second ends, said first stopper defining a liquid-tight seal with said inner surface and having a front end; a second stopper slidably disposed within said wall between said first stopper and said first end, said second stopper defining a liquid-tight seal with said inner surface; a flexible insert disposed at or in proximity to said second end, said insert forming a liquid-tight seal with said wall, said insert having a recess formed therein being complementarily sized and shaped to at least partially nestingly receive said front end of said first stopper; and
,a retainer fixed to said wall at said second end, said retainer having an opening therein for providing access to said insert for piercing by a medical needle, wherein, said insert extends into said retainer and forms a liquid-tight seal across said opening. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14)
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15. An article for holding and mixing a medical product comprising:
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a tubular body having a cylindrical wall with first and second opposing ends, said wall having inner and outer surfaces, said inner surface having a generally constant cross-section along a substantial portion of said wall; a first stopper slidably disposed within said wall between said first and second ends, said first stopper defining a liquid-tight seal with said inner surface; a second stopper slidably disposed within said wall between said first stopper and said first end, said second stopper defining a liquid-tight seal with said inner surface; a flexible insert at least partially disposed inside said inner surface at or in proximity to said second end, said insert forming a liquid-tight seal with said wall; and
,a rigid retainer having a first portion fixed to said wall at said second end and a barrel-shaped portion with an outer surface formed to cooperatively engage a hub of a medical needle assembly, said first portion having a larger diameter than said barrel-shaped portion, said barrel-shaped portion extending outwardly from said wall and terminating at a free end with an opening therein for providing access to said insert for piercing by a medical needle, wherein, said insert extends from said tubular body and into said barrel-shaped portion and forms a liquid-tight seal across said opening. - View Dependent Claims (16, 17)
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Specification