Hydrodynamic coupling devices

Claim 1

IN A HYDRODYNAMIC COUPLING DEVICE, TWO OPPOSED SHEET METAL STAMPINGS OF A THICKNESS SUFFICIENTLY THIN THAT, IF WELDED WITH A CONTINUOUS WELD, WILL EXHIBIT RADIAL DISTORTION OF SAID STAMPINGS DUE TO THE HEAT OF WELDING OPERATION HAVING HOLLOW PORTIONS DEFINING A TOROIDAL FLUID CONTAINING HOUSING, SAID STAMPINGS BEING PROVIDED WITH RADIALLY OUTER TELESCOPING ANNULAR PORTIONS PROJECTING TOWARD EACH OTHER, SAID OPPOSED STAMPINGS HAVING A POSITIVE AXIAL STOP MEANS THEREBETWEEN, ONE OF SAID STAMPINGS HAVING A CIRCUMFERENTIAL EDGE POSITIONED ADJACENT THE OTHER OF SAID STAMPINGS, SEAL MEANS DISPOSED BETWEEN SAID STAMPINGS PROVIDING THE SOLE BARRIER TO FLUID EGRESS, AND CIRCUMFERENTIALLY SPACED WELDS INTEGRAL WITH SAID CIRCUMFERENTIAL EDGE AND INTEGRAL WITH THE OTHER OF SAID STAMPINGS CONNECTING SAID STAMPINGS TO EACH OTHER, SAID CIRCUMFERENTIALLY SPACED WELDS BEING OF AN EXTENT SUFFICIENT TO PROVIDE FOR A POSITIVE CONNECTION BETWEEN SAID STAMPINGS AND OF AN EXTENT INSUFFICIENT TO CAUSE AN APPRECIABLE AMOUNT OF DISTORTION OF SAID STAMPINGS DUE TO THE HEAT OF WELDING.