Device for dispensing drops of small volume, in particular for o

Surgery – Means for introducing or removing material from body for... – Treating material applied to or removed from external...

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604300, 417489, 222340, 222387, 222494, A61M 3500

Patent

active

052076598

ABSTRACT:
A device for dispensing of small volume comprises a pump associated with a container of the substance to be dispensed, the pump comprising: a hollow pump body; and a piston sliding inside said pump body in sealing contact with the pump body around a circular periphery of diameter D2; wherein the pump further includes: a push rod including a central channel in which a valve seat is formed, the push rod sliding in contact with the pump body around a circular periphery of diameter D1 less than D2; a punch secured to the piston and capable of bearing in sealed manner against the valve seat; and resilient means urging the piston against the valve seat.

REFERENCES:
patent: 4623337 (1986-11-01), Maurice
patent: 4930999 (1990-01-01), Brunet et al.
patent: 5024355 (1991-06-01), Jouillat et al.

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