초록 ▼

A device for administering a liquid in a number of doses, such as insulin to a patient, comprising a piston (3) in a pump chamber (4), a cannula (5) being connectable to the pump chamber, a piston rod (14) connected to the piston and having an operating button (25), a valve (1) and a reservoir (2),

A device for administering a liquid in a number of doses, such as insulin to a patient, comprising a piston (3) in a pump chamber (4), a cannula (5) being connectable to the pump chamber, a piston rod (14) connected to the piston and having an operating button (25), a valve (1) and a reservoir (2), wherein by retracting the piston (3), at the same time the reservoir is connected to the pump chamber (4) through the valve in order to fill the pump chamber and the valve is moved into the position for closing the connecting element (6) between the pump chamber and the cannula (5) and wherein, by moving the piston forward, at the same time the connecting element between the pump chamber and the cannula is connected through the valve to the pump chamber and the valve is moved into the position for closing the passage (7) between the reservoir and the pump chamber.

대표청구항 ▼

A device for administering a liquid in a number of doses, such as insulin to a patient, said device comprising a piston being reciprocatably disposed in a pump chamber, a cannula being connectible to the pump chamber and a piston rod connected to the piston and having an operating button characteriz

A device for administering a liquid in a number of doses, such as insulin to a patient, said device comprising a piston being reciprocatably disposed in a pump chamber, a cannula being connectible to the pump chamber and a piston rod connected to the piston and having an operating button characterized by a valve (1) and a reservoir (2) wherein by retracting the piston (3), at the same time the reservoir is connected to the pump chamber (4) through the valve in order to fill the pump chamber and the valve is moved into the position for closing the connecting element (6) between the pump chamber and the cannula (5) and wherein, by moving the piston forward, at the same time the connecting element between the pump chamber and the cannula is connected through the valve to the pump chamber and the valve is moved into the position for closing the passage (7) between the reservoir and the pump chamber, and the valve consists of a sleeve (10) about a body (8), a channel (9) extending through the body, between the pump chamber and the connecting element (6) for the cannula and the passage in the body branching off from the chanenl and communicating with the reservoir and in that the sleeve is of elastic material and in unburdened condition closes off both the outlet (12) of the channel to the cannula and the outlet (11) of the reservoir to the passage, whereas the sleeve portion of the outlet of the channel can only be pushed aside elastically by piston pressure exerted in the pump chamber and the upper rim of the sleeve reaches exactly up to the upper side of the passage of the reservoir, so that under subatmospheric pressure created by retracting the piston in the pump chamber, the sleeve contracts elastically so that the passage is open, whereas the sleeve near the passage completely covers the outlet of the reservoir during superatmospheric pressure in the passage.