Title:
無針注射器
Document Type and Number:
Japanese Patent JP4035127
Kind Code:
B2
Abstract:
A needle-less injector comprises a cartridge (3) pre-filled with liquid (9), which cartridge contains a free sliding piston (32) and an injection orifice (10). A ram (22) is urged by a pre-loaded spring (24) for striking the said piston to cause the injections. Adjusting means (6) can be provided to vary the volume injected. A trigger device (26, 30) initiates injection only when the optimum contact pressure is reached between the discharge orifice (1) and epidermis of the subject. The initial loading of the power spring (24) is sufficient to dispense all of the contents of the medicament cartridge in one dose or multiple sequential doses. Disposable and reusable embodiments are described.
Inventors:
Weston, terence, edward
Application Number:
JP2004327719A
Publication Date:
January 16, 2008
Filing Date:
November 11, 2004
Export Citation:
Assignee:
Weston Medical Limited
International Classes:
A61M5/30; A61M5/20; A61M5/24; A61M5/28; A61M5/31; A61M5/315
Domestic Patent References:
| JP11514242A | ||||
| JP61268265A | ||||
| JP63315063A | ||||
| JP6278252A | ||||
| JP6126761A | ||||
| JP6182791A |
Foreign References:
| EP0276158A2 | ||||
| US2762369 | ||||
| US2380534 | ||||
| GB993309A |
Attorney, Agent or Firm:
Kensuke Isshiki
Noritaka Harashima
Noritaka Harashima