Disposable injector with a flexurally elastic piston-actuating ram
AssigneeLTS Lohmann Therapie-Systeme AG
InventorRUDOLF MATUSCH
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Abstract
A disposable injector with a cylinder/piston unit that can be filled at least temporarily with active substance, with a housing in which a pretensioned and releasable mechanical spring energy reservoir is arranged, and with at least one piston-actuating ram positioned between the spring energy reservoir and the piston of the cylinder/piston unit. The piston-actuating ram has two draw hooks that engage around the housing in some areas. In addition, the piston-actuating ram is separable from the housing by means of the relaxing spring energy reservoir. With the present invention, a disposable injector is developed which, with a small overall size, comprises only a small number of components and, while being easy to handle, ensures safe storage and operation
Claims20
In combination with a disposable injector (4) including a cylinder/piston unit (100) that can be filled at least temporarily with active substance, an inner housing (200) in which a pretensioned and releasable mechanical spring energy reservoir (50) is arranged, and a piston-actuating ram (60) positioned between the spring energy reservoir (50) and the piston (111) of the cylinder/piston unit (100), the improvement which comprises:
- the piston-actuating ram (60) including two draw hooks (78) that engage around the inner housing (200) in some areas,
- the piston-actuating ram (60) is separable from the inner housing (200) by means of releasing the spring energy reservoir (50), and
- both the inner housing (200) and also the piston-actuating ram (60) are thin-walled sheet-metal parts.
Dependencies are inferred from the claim text.