Pipe coupling

US4690436A · kind A · utility

Inventor

• Karl Hehl · Usedom, DE

Key dates

• Filing date: May 28, 1985
• Grant date: Sep 1, 1987
• Expiry date: May 28, 2005

Classification

• Technology area (CPC F): Mechanical Engineering; Lighting; Heating
• CPC primary: F16L55/1108
• WIPO field: Mechanical elements
• WIPO sector: Mechanical engineering

Abstract

A pipe coupling having an annular gasket deformed and compressed within a closed gasket chamber to form a seal for a pressurized hydraulic line, for example, one wall of the gasket chamber being formed by the outer surface of a pipe end portion which is to be connected either to a second pipe end portion or to a wall port. The axial width of the gasket chamber is determined by an abutment of the end face of the pipe end portion which transmits the abutment force to a threaded clamping sleeve or, as the case may be, to a coupling nut with the aid of a snap ring which engages a peripheral groove of the pipe end portion and a thrust shoulder of the threaded clamping sleeve. The pipe-to-pipe version of the coupling has two annular gaskets inside identical gasket chambers on opposite axial sides of a centering sleeve which surrounds both pipe end portions.