Mannesmann Aktiengesellschaft

Mannesamnn Ag

Heinz Unewisse

Herbert Foering

A fluid conduit connection includes in combination a cast or molded connecting member; a connecting socket affixed to the connecting member and comprising a standarized sheet metal press fitting having one end thereof attached to the connecting member and comprising a substantially cylindrically portion and, at the other end thereof, an annular groove for housing a sealing member. The press fitting is dimensioned for receiving a substantially cylindrical conduit to be inserted therein and for non-releasably crimping the fitting around the conduit.

Pipe connection

A method is provided of forming a sleeve to tube joint of enhanced resistance to pressure loading and which can be employed with relatively large diameter pipes, in which the sleeve and tube are crimped to each other by diametrically opposite crimps extending concavely inwardly of the outer surface of the sleeve and convexly inwardly of the inner surface of the tube, the respective crimps being isolated from each other by struts extending parallel to the longitudinal axis of the sleeve and tube, provision being made for equalization of the stresses produced in a seal ring contained in an annular flange of the sleeve during compressive reduction of the annular flange, provision also being made for the axial movement of the sleeve relative to the tube during compressive reduction of the flange.

Method of forming a crimped sleeve to tube joint

A process apparatus for the manufacture of a permanent, tight pipe joint between a smooth pipe end and a press fitting surrounding it, includes the latter being pressed positively and non-positively onto the inserted pipe end by means of a pressing tool applied to it. The process is characterized by the fact that, after the application of the pressing tool, the pipe already inserted into the press fitting, or the press fitting pushed onto the end of the pipe, is exposed to an adjustable axial force by means of an apparatus located on the pressing tool, and the closing movement of the jaws for the pressing of the press fitting can only be triggered when this force has reached a value which is greater than a specified adjustable response level.

Method for producing a locked, tight pipe-connection

A tool is provided of forming a sleeve to the joint of enhanced resistance to pressure loading and which can be employed with relatively large diameter pipes, in which the sleeve and tube are crimped to each other by diametrically opposite crimps extending concavely inwardly of the outer surface of the sleeve and convexly inwardly of the inner surface of the tube, the respective crimps being isolated from each other by struts extending parallel to the longitudinal axis of the sleeve and tube, provision being made for equalization of the stresses produced in a seal ring contained in an annular flange of the sleeve during compressive reduction of the annular flange, provision also being made for the axial movement of the sleeve relative to the tube during compressive reduction of the flange.

Tool for forming a crimped sleeve to tube joint

A sleeve to tube joint is provided of enhanced resistance to pressure loading and which can be enployed with relatively large diameter pipes, in which the sleeve and tube are crimped to each other by diametrically opposite crimps extending concavely inwardly of the outer surface of the sleeve and convexly inwardly of the inner surface of the tube, the respective crimps being isolated from each other by struts extending parallel to the longitudinal axis of the sleeve and tube, provision being made for equalization of the stresses produced in a seal ring contained in an annular flange of the sleeve during compressive reduction of the annular flange, provision also being made for the axial movement of the sleeve relative to the tube during compressive reduction of the flange.

Growing community of inventors

Muehlheim/Ruhr, Germany

Heinz Unewisse