| 发明名称 | Needleless injector | ||
| 摘要 | A needleless injector has a syringe body having an opening at one end, a piston housed within the syringe body for urging a liquid within the syringe body through the opening and a ram for driving the piston. A shock absorbing component is provided for reducing an initial transfer of force from the ram to the piston. The initial rate of pressure increase on the liquid is reduced, thereby controlling the rate of collapse of gas bubbles in the liquid. | ||
| 申请公布号 | US9629960(B2) | 申请公布日期 | 2017.04.25 |
| 申请号 | US201414473580 | 申请日期 | 2014.08.29 |
| 申请人 | ZOGENIX, INC. | 发明人 | Green Terry |
| 分类号 | A61M5/30;A61M5/315;A61M5/20;A61M5/31 | 主分类号 | A61M5/30 |
| 代理机构 | Bozicevic, Field & Francis LLP | 代理人 | Bozicevic Karl;Bozicevic, Field & Francis LLP |
| 主权项 | 1. A needle-free injector for injecting through skin, comprising: a piston housed within a syringe body; a power source for applying an initial force to a ram to initiate delivery of a liquid and collapse of a bubble in the liquid; wherein during a first stage of delivery, a reduced force is applied by the ram to a piston which applies force to the liquid in the first stage of delivery thereby causing the bubble to collapse in a slow, controlled manner; and further wherein during a second stage of the delivery, the ram and piston are configured in the needle-free injector so as to transfer energy of the ram to the piston wherein the piston applies force to the liquid in the second stage; wherein pressure in the liquid during the second stage is sufficiently high to enable an initial pulse of liquid to penetrate skin. | ||
| 地址 | Emeryville CA US | ||