초록 ▼

In a syringe comprising a barrel and a plunger reciprocably mounted therein the end wall of the barrel at the discharge end thereof is formed by a disposable container removably attached to the barrel. A flexible wall portion of the container facing the plunger is moved towards and away from a rigid

In a syringe comprising a barrel and a plunger reciprocably mounted therein the end wall of the barrel at the discharge end thereof is formed by a disposable container removably attached to the barrel. A flexible wall portion of the container facing the plunger is moved towards and away from a rigid wall portion of the container by the reciprocating movement of the plunger in order to decrease and increase, respectively, the interior volume of the container.

대표청구항 ▼

A syringe comprising an elongated barrel having an open discharge end, a plunger reciprocably mounted in the barrel, a container, means for removably engaging the container to the discharge end of the barrel to form the end wall thereof, said engaging means including a circumferential flange on said

A syringe comprising an elongated barrel having an open discharge end, a plunger reciprocably mounted in the barrel, a container, means for removably engaging the container to the discharge end of the barrel to form the end wall thereof, said engaging means including a circumferential flange on said container, said flange having at least a flexible periphery for being flexed by the end of the barrel when the container is being engaged as the end wall thereof and for retaining said container as the end wall of the barrel by the tendency of at least said flexible periphery of the flange to restore to its unflexed state, and means on said barrel at said open end for flexing at least said flexible periphery and permitting restoration of said flange toward its unflexed state, said container having a substantially rigid first wall portion at the exterior side of the end wall and having an inside surface, and a flexible second wall portion at the interior side of the end wall and introvertible upon the inside surface of the first wall portion, said plunger having an end surface facing the container and designed to contact said second wall portion and to introvert the flexible wall portion upon the rigid wall portion during reciprocable movement of the plunger, said end surface being shaped to substantially conform to the shape of said inside surface of said first wall portion, and a nozzle on said first wall portion for attaching a hypodermic needle thereto.