发明名称 |
Relating in and relating to an injection device |
摘要 |
Injection devices are known for the self administration of a medicament by patients in which the medicament is contained within a cartridge located within the injection device. It is a problem that such injection devices should be small enough to fit into a jacket pocket or a hand bag without difficulty. Concurrently, the injection device must be of size that enables a piston or similar used to drive a cartridge bung within the cartridge to be moved both to a maximum dispense position within the cartridge and to be fully withdrawn from the cartridge to allow for replacement of the cartridge. A drive mechanism for an injection device is disclosed comprising a piston member 10, a semi rigid belt 18 connected to the piston member 10, a belt drive means to selectively engage with the semi rigid belt 18 to drive the semi rigid belt 18, and a dose setting mechanism to control the selective engagement of the semi rigid belt in which the semi rigid belt 18 includes a track incorporated therein and the belt drive means comprises a tooth 50 for selective engagement with the track to drive the belt 18 only when there is relative movement between the semi rigid belt 18 and the tooth 50 in a first direction. An injection device comprising such a drive mechanism is also disclosed.
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申请公布号 |
US2004087904(A1) |
申请公布日期 |
2004.05.06 |
申请号 |
US20030471692 |
申请日期 |
2003.09.15 |
申请人 |
LANGLEY CHRISTOPHER NIGEL;WOOLSTON ROBERT;PLUMPTRE DAVID AUBREY |
发明人 |
LANGLEY CHRISTOPHER NIGEL;WOOLSTON ROBERT;PLUMPTRE DAVID AUBREY |
分类号 |
A61M1/36;A61M5/145;A61M5/24;A61M5/315;(IPC1-7):A61M37/00 |
主分类号 |
A61M1/36 |
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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