Coupling means for connecting molten metal transporting lines

Claim 2

In a pumping and metering assembly for transferring molten metal to a delivery line, an improved means for coupling the pumping and metering assembly to the delivery line, the coupling means comprising: a stud fitting having a ball-shaped head portion and a lengthwise axial bore extending therethrough, the stud fitting being upstandingly affixed to the pumping and metering assembly such that the lower end of the fitting bore is in direct communication with the outlet end of a metal-conducting passageway in said pumping and metering assembly; a generally bell-shaped fitting having a central bore extending substantially lengthwise through the fitting, the bore including a lower bore section adapted to sealingly engage the head portion of the stud fitting and an upper bore section obliquely intersecting the lower bore section and being directly joined to the inlet end of a metal-conducting passageway in said delivery line.

Claim 3

The coupling means of claim 1 wherein the lower bore section of the bell fitting defines a frustoconical cavity having tapered sidewalls adapted to wedgingly engage the perimeter of the ball-shaped head portion of the stud fitting.

Claim 4

The coupling means of claim 1 wherein the upper bore section defines a cylindrical cavity, the lower end of which intersects with an upper transverse wall of the lower bore section at an angle of about 45*.

Claim 5

In a metal die casting apparatus including a pumping and metering assembly for transferring molten metal to a delivery line, an improved means for coupling the pumping and metering assembly to the delivery line, the coupling means comprising: a stud fitting having a ball-shaped head portion and a lengthwise axial bore extending therethrough, the stud fitting being upstandingly affixed to the pumping and metering assembly such that the lower end of the fitting bore is in direct communication with the outlet end of a metal-conducting passageway in said pumping and metering assembly; a generally bell-shaped fitting having an integral knob member at the apex of the fitting, the fitting including a central bore extending substantially lengthwise through the fitting, the bore including a lower bore section adapted to sealingly engage the head portion of the stud fitting and an upper bore section obliquely intersecting the lower bore section and being directly joined to the inlet end of a metal conducting passageway in said delivery line; holddown means adapted to engage the knob member of the bell-shaped fitting and to urge said fitting downwardly against the stud fitting to thereby provide sealing contact between the lower bore section of the bell fitting and the head portion of the stud fitting.

Claim 6

In a metal die casting apparatus including a pumping and metering assembly for transferring molten metal to a delivery line, an improved means for coupling the pumping and metering assembly to the delivery line, the coupling means comprising: a stud fitting having a ball-shaped head portion and a lengthwise axial bore extending therethrough, the stud fitting being upstandingly affixed to the pumping and metering assembly such that the lower end of the fitting bore is in direct communication with the outlet end of a metal-conducting passageway in said pumping and metering assembly; a generally bell-shaped fitting having an integral knob member at the apex of the fitting, the fitting including a central bore extending substantially lengthwise through the fitting, the bore including a lower bore section adapted to sealingly engage the head portion of the stud fitting and an upper bore section obliquely intersecting the lower bore section and being directly joined to the inlet end of a metal conducting passageway in said delivery line; holddown means adapted to engage the knob member of the bell-shaped fitting and to urge said fitting downwardly against the stud fitting to thereby provide sealing contact between the lower bore section of the bell fitting and the head portion of the stud fitting.

Claim 7

The die-casting apparatus of claim 4 in which the holddown means is defined by an upstanding rod having a recess in the lower end thereof adapted to engage the knob member of the bell fitting and the upper end of the rod being adapted for engagement with a lever member carried on the diecasting apparatus and adapted for effecting up and down movement of the rod.