Claims Analysis
Total Claims: 6
Claim 1
Independent Claim
163 words
A fail-safe liquid pumping system comprising: a. a reservoir containing an electrically conductive liquid, b. conduit means having one end immersed within said liquid to a depth below the minimum liquid level within said reservoir, said conduit means being canted to extend upwardly from said reservoir before turning downwardly for discharge of said liquid from the other end of said conduit, the discharge end of said conduit means being at an elevation lower than the minimum molten metal level within said reservoir to siphon metal from said reservoir, c. electromagnetic pump means disposed along the downwardly extending leg of said conduit means for controlling the flow of liquid through said conduit, d. flow initiating means for lifting said liquid from said reservoir to said flow control means to initiate pumping of liquid from said reservoir, and e. flow terminating valve activated upon detection of an anormal process parameter to inhibit further lifting of the liquid from said reservoir to said flow control means.
Claim 2
Dependent Claim
163 words
A fail-safe liquid pumping system comprising: a. a reservoir containing an electrically conductive liquid, b. conduit means having one end immersed within said liquid to a depth below the minimum liquid level within said reservoir, said conduit means being canted to extend upwardly from said reservoir before turning downwardly for discharge of said liquid from the other end of said conduit, the discharge end of said conduit means being at an elevation lower than the minimum molten metal level within said reservoir to siphon metal from said reservoir, c. electromagnetic pump means disposed along the downwardly extending leg of said conduit means for controlling the flow of liquid through said conduit, d. flow initiating means for lifting said liquid from said reservoir to said flow control means to initiate pumping of liquid from said reservoir, and e. flow terminating valve activated upon detection of an anormal process parameter to inhibit further lifting of the liquid from said reservoir to said flow control means.
Claim 3
Dependent Claim
49 words
A fail-safe liquid pumping system according to claim 1 wherein said means responsive to the anormal process parameter include means for tilting said reservoir by an amount to reduce the reservoir liquid level adjacent said conduit means below the level of the flow control means disposed along the conduit.
Claim 4
Dependent Claim
63 words
A fail-safe liquid metal pumping system according to claim 1 wherein said electromagnetic pump means is reversible to impede the gravity discharge of molten metal from said conduit means upon energization of said electromagnetic pump means in a first direction and to assist gravity discharge of molten metal from said conduit means upon energization of said electromagnetic pump means in a second direction.
Claim 5
Dependent Claim
122 words
A liquid metal pumping system for a casting operation comprising: a. a reservoir of molten metal, b. conduit means having one end immersed within said molten metal reservoir to permit siphoning of molten metal from said reservoir upon charging of said siphon, c. electromagnetic pump means disposed along the length of said siphon for controlling the gravitational flow of molten metal from said reservoir through said conduit means, d. flow terminating means situated between said reservoir and said electromagnetic pump means to vent said siphon upon observation of an anormal operating condition in said casting operation, and e. means for energizing said electromagnetic pump means in opposite directions to enhance or impede the gravitational flow of liquid metal through said conduit means.
Claim 6
Dependent Claim
122 words
A liquid metal pumping system for a casting operation comprising: a. a reservoir of molten metal, b. conduit means having one end immersed within said molten metal reservoir to permit siphoning of molten metal from said reservoir upon charging of said siphon, c. electromagnetic pump means disposed along the length of said siphon for controlling the gravitational flow of molten metal from said reservoir through said conduit means, d. flow terminating means situated between said reservoir and said electromagnetic pump means to vent said siphon upon observation of an anormal operating condition in said casting operation, and e. means for energizing said electromagnetic pump means in opposite directions to enhance or impede the gravitational flow of liquid metal through said conduit means.