초록 ▼

A pump for delivering a fluid contained in an elastic phial includes a pump body and a movable piston fitted inside the pump body. The front end of the pump body is located on a fluid-outlet side, and the front end includes an outlet orifice (11) sealed off by an elastic membrane (24). The outlet or

A pump for delivering a fluid contained in an elastic phial includes a pump body and a movable piston fitted inside the pump body. The front end of the pump body is located on a fluid-outlet side, and the front end includes an outlet orifice (11) sealed off by an elastic membrane (24). The outlet orifice is connected to a pump duct (18) inside the pump body, and the pump duct 18 is in turn connected to a fluid-inlet orifice (15). An end (2) of the movable piston is hermetically fitted within the pump duct (18) with slight friction, and the displacement of the end (2) of the piston relative to the portion of the pump body between the inlet orifice (15) and the a stop position (16) near the outlet orifice (11) determines the quantity of fluid expelled from the pump body. The inlet orifice allows a predetermined quantity of fluid to be trapped at the end of the pump duct (18) before being expelled through the outlet orifice (11). With the exception of the front end of the pump body, the pump body and the movable piston are totally enveloped by the elastic phial.

대표청구항 ▼

[ I claim:] [1.] A pump for the delivery of a fluid contained in an elastic phial, comprising:a pump body having a front end on a fluid outlet side, said front end comprising an outlet orifice (11) normally sealed off by an elastic membrane (24), and continuing backwards through a pump duct (18) wit

[ I claim:] [1.] A pump for the delivery of a fluid contained in an elastic phial, comprising:a pump body having a front end on a fluid outlet side, said front end comprising an outlet orifice (11) normally sealed off by an elastic membrane (24), and continuing backwards through a pump duct (18) with a fluid inlet orifice (15);a movable piston fitted inside the pump body, the relative displacement of an end (2) of the piston in relation to the pump body between the inlet orifice (15) and a stop (16) position located towards the outlet orifice (11) thus determining the quantity of fluid expelled on displacement, the end (2) of the piston fitting hermetically by slight friction against the pump duct (18), the inlet orifice (15) being of a sufficient size for only the preset quantity of fluid to be trapped in an end of the pump duct (18) for its expulsion through the outlet orifice (11) and a separable seam defined by interface of said outlet orifice (11) and said elastic membrane (24), the pump body and the piston being totally enveloped by the elastic phial, with the exception of the front end of the pump body.