×

Automatically-closing connector for connecting a liquid injection head to an injection outlet

  • US 6,595,981 B2
  • Filed: 12/15/2000
  • Issued: 07/22/2003
  • Est. Priority Date: 12/16/1999
  • Status: Expired due to Term
First Claim
Patent Images

1. An automatically-closing connector for coupling an injection head to an injection outlet, in particular for medical use, the connector comprising a case which defines a housing which is accessible via an injection inlet duct opening out into the housing through an end wall of the housing, said housing communicating with an injection outlet of the connector, and the inlet duct being designed to enable the injection head to be inserted with lateral sealing into said duct towards the housing, and the connector including a rigid and non-deformable closing piston which is movable in the housing and in the inlet duct between an upstream position in which it closes the duct and towards which it is urged by resilient return means, and a downstream position in which it no longer closes the duct and towards which it is pushed by the injection head when the head is inserted into the inlet passage, the connector having a compression chamber accessible to the liquid injected by the injection head and which communicates with the outlet of the connector, the volume of said chamber varying under the effect of the displacement of the closing piston so that withdrawing the injection head causes the volume of the chamber to be reduced and excess liquid in the chamber to be expelled towards the injection outlet, wherein the closing piston is rigid and non-deformable, wherein said compression chamber is a space constituted in the housing around the closing piston and defined upstream by said end wall of the housing and downstream by a peripheral sealing gasket carried by the piston, wherein the outlet of the connector is situated downstream from said gasket, and wherein the closing piston has an internal passage which presents an inlet that opens out into the compression chamber and which presents an outlet which communicates with the injection outlet of the connector.

View all claims
  • 1 Assignment
Timeline View
Assignment View
    ×
    ×