发明名称 |
METERED-DOSE VALVE FOR PHARMACEUTICAL AEROSOL |
摘要 |
A medicinal aerosol product having a blockage resistant metered-dose valve with a metal valve stem, particularly for use with CFC-free solution formulations using hydrogen-containing propellants, such as 134a and/or 227, and ethanol. The valve stem (10) has a reduced internal volume (40) and a constant internal diameter as compared to conventional deep drawn stems. The valve stems are preferably composed of stainless steel containing at least 11.5 % chromium and are preferably fabricated by machining the outside of the stem and drilling the central outlet and side port. The stems are preferably bright annealed and/or treated with nitric or citric acid.
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申请公布号 |
CA2329900(A1) |
申请公布日期 |
1999.11.04 |
申请号 |
CA19992329900 |
申请日期 |
1999.04.29 |
申请人 |
3M INNOVATIVE PROPERTIES COMPANY |
发明人 |
ROSS, DANNA L.;SZKUDLAREK, BETH A.;ZINN-WARNER, ALEXIS;DUPONT, RICHARD L.;ALBAND, TODD D. |
分类号 |
B65D83/44;A61K9/00;A61M15/00;B05B9/04;B65D83/14;(IPC1-7):B65D83/14 |
主分类号 |
B65D83/44 |
代理机构 |
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代理人 |
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主权项 |
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地址 |
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