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US 4,043,345 AGranted
Catheter
AssigneeByk Gulden Lomberg Chemische Fabrik GmbH
InventorsBernhard Kramann, Heinrich Tammen
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AssigneeByk Gulden Lomberg Chemische Fabrik GmbH
InventorsBernhard Kramann, Heinrich Tammen
Estimating the term…
A catheter including a flexible hose attached to one end of a rigid tube through which fluid pressure may be applied to invert said hose from an invaginated position within said tube to an exserted position extending outwardly of said tube has formed at the distal of said hose a valve which remains closed when the hose is in the invaginated position and which opens with the hose in its exserted position. The valve is formed integrally by portion of the hose distal end by cutting the distal end along a plane extending obliquely of the axis of the hose and forming the distal end walls of the hose in an abutting configuration defining therebetween an orifice which tends to remain closed by abutment of the distal end walls against each other when the hose is in its invaginated position, and particularly when fluid pressure is applied within the tube, with the abutting wall portions between which said orifice is defined tending to separate to open the orifice when the hose is exserted from the tube.
A catheter comprising a substantially rigid tube adapted to have fluid pressure introduced through one end thereof, a hose having a proximal end in fluid-tight engagement with the other end of said tube and a distal end, said hose being invaginated within said rigid tube, said hose being structured to be brought from an invaginated position into the exserted position by introduction of fluid pressure through said one end of said tube, and orifice means defined through wall portions of said hose at said distal end thereof, said wall portions having said orifice means defined therethrough being arranged in an overlapping abutting configuration to provide means creating a force to maintain said orifice means closed by maintaining said wall portions in said abutting relationship when said hose is in said invaginated position, said wall portions being configured to separate to release said abutting relationship thereby to open said orifice means when said hose is brought to said exerted position.
Dependencies are inferred from the claim text.