Three-way connector for liquid exchange
First Claim
1. A three-way connector for the exchange of fluids, of the type having a valve body, a connection tube, a supply tube, a drain tube, and means for holding one end of each of the tubes in the valve body, wherein the improvement comprises:
- a chamber defined by said valve body, said one end of said connection tube and of said drain tube opening out into said chamber;
a tubular duct extending from said correction tube having an end projecting into said chamber and axially aligned with said one end of said supply tube;
a diaphragm closing said one end of said supply tube; and
means for axially displacing said one end of said supply tube between a first position wherein said end of said supply tube is remote from said end of said tubular duct and said connection tube communicates with said drain tube for fluid exchange, and a second position wherein said one end of said supply tube is in proximity to said end of said tubular duct and said diaphragm is pierced by said end of said tubular duct, thereby establishing communication between said supply tube and said connection tube.
1 Assignment
0 Petitions
Accused Products
Abstract
One end (4a) of a supply tube (4) opening out into the three-way connector is closed by a diaphragm (9) and filled with fresh fluid. This end is situated opposite one end of a duct (3b;36) to which a connection tube (3) is connected, with which it is axially aligned. This duct end has a pointed tip (8; 37) of hard plastic material. The end of the supply tube is axially displaceable in a chamber (2) of the three-way connector. By moving this end toward the tip of the duct end, the diaphragm is pierced by the tip, so that the fresh fluid can flow from the supply tube into the connection tube. One end of a drain tube (5) runs perpendicular to the duct end and opens out in the chamber. This closed three-way connector cannot be contaminated, is easy to use, and is largely proof against incorrect manipulation.
197 Citations
10 Claims
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1. A three-way connector for the exchange of fluids, of the type having a valve body, a connection tube, a supply tube, a drain tube, and means for holding one end of each of the tubes in the valve body, wherein the improvement comprises:
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a chamber defined by said valve body, said one end of said connection tube and of said drain tube opening out into said chamber; a tubular duct extending from said correction tube having an end projecting into said chamber and axially aligned with said one end of said supply tube; a diaphragm closing said one end of said supply tube; and
means for axially displacing said one end of said supply tube between a first position wherein said end of said supply tube is remote from said end of said tubular duct and said connection tube communicates with said drain tube for fluid exchange, and a second position wherein said one end of said supply tube is in proximity to said end of said tubular duct and said diaphragm is pierced by said end of said tubular duct, thereby establishing communication between said supply tube and said connection tube. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 10)
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9. The three-way connector 8, wherein said tube piece includes a wall portion situated substantially in the center thereof and intended to serve as a thumb-rest for a user of said connector, said sliding sleeve having a flange projecting radially therefrom and intended to serve as a rest for the index and middle fingers of a said user.
Specification