초록 ▼

A non-return valve for medical purposes, in particular for balloon catheters, has a hollow valve housing (3) which at one end has a connecting opening (8) for the insertion of a syringe nozzle and two abutments (16, 17) for a slide member (18). The slide member runs with its peripheral surface over

A non-return valve for medical purposes, in particular for balloon catheters, has a hollow valve housing (3) which at one end has a connecting opening (8) for the insertion of a syringe nozzle and two abutments (16, 17) for a slide member (18). The slide member runs with its peripheral surface over at least one valve opening (15) at the cylindrical inside periphery (14) of the housing (3). The first abutment (16) is of such a slightly raised configuration that the slide member (18) can be inserted through the connecting opening (8), by making use of the elastic deformability of the valve housing (3) and/or the slide member. That makes it possible for the second abutment (17), at the end in opposite relationship to the connecting opening (8), to be already ready moulded in the manufacturing process.

대표청구항 ▼

In a non-return valve suitable for medical purposes comprising a hollow valve housing having an opening to receive the mouthpiece of a syringe, said housing having a first abutment at its syringe-receiving end and a second abutment at its opposite end to thereby contain a valve closure member; a rec

In a non-return valve suitable for medical purposes comprising a hollow valve housing having an opening to receive the mouthpiece of a syringe, said housing having a first abutment at its syringe-receiving end and a second abutment at its opposite end to thereby contain a valve closure member; a reciprocal, valve closure member disposed within the valve housing and displaceable by a syringe, the improvement which comprises a valve housing having a first slight abutment disposed inwardly of the interior wall of the housing so as to facilitate entry disposing of the valve closure member within the housing, a slidable valve-closure member having a peripheral surface in constant contact with the interior wall of the valve housing when the valve is in open or closed position; and an opening in the interior wall of the valve housing which communicates with an opening in the syringe mouthpiece through axial displacement of the valve closure member past the opening in the interior wall of the housing.