DAVID JOHNSTON,MATTHEW BRADY,NIGEL HARRISON,TIM BARROW-WILLIAMS
申请号：
BRPI0510443
公开号：
BRPI0510443B1
申请日:
2005.05.27
申请国别(地区):
BR
年份:
2016
代理人:
摘要：
injection device. The present invention relates to an injection device (10； 110, 210) which is described. a housing (12； 112, 212) receives a syringe and includes a return spring (26； 126, 226) for orienting the spring from an extended position in which its needle (18； 118, 218) extends to from the housing (12； 112, 212) to a retracted position in which it does not. a guide spring (30； 130, 230) acts on the first guide member (32: 132, 232) and the second guide member (34； 134, 234) acts on the syringe to advance it from its retracted position to its extended position and discharge its contents through the needle. the first driving element (32； 132, 232) is capable of movement relative to the second (34； 134, 234) when the first is driven by the driving spring (30, 130, 230) and the last is restricted by the syringe (14). , 114, 214). a reservoir (48； 148, 248) is defined between the first directing element (32； 132, 232) and the second directing element (34； 134,234), the reservoir volume (48: 148, 248) tending to decrease as wherein the first driving element (32； 132, 232) moves relative to the second (34: 134, 234) when driven by the driving spring (30； 130, 230). the reservoir (48: 148, 248) contains a highly viscous fluid and has a vent (44； 144, 244) through which fluid escapes as the volume of the reservoir (48； 148, 248). the first directing element (32； 132, 232) includes a rod (40, 140, 240) and defines a vent (44: 144, 244) and a fluid collection chamber and the second directing element (34； 134, 234). ) includes a blind hole (46； 146, 246) which is open at one end to receive the stem (40； 140, 240) and closed at the other, the hole and stem thereby defining the fluid reservoir. a release mechanism (52； 133, 233) is activated when the first drive element (34: 134, 234) has been advanced to the nominal release position to release the syringe (14: 114,214) from the drive spring action (30 ； 130, 230) whereby the return spring (26； 126, 226) restores the syr
