Metal working – Method of mechanical manufacture – Assembling or joining
Patent
1976-04-28
1977-07-19
Moon, Charlie T.
Metal working
Method of mechanical manufacture
Assembling or joining
29509, 29522, 204197, B23P 300, B23P 2500
Patent
active
040359034
ABSTRACT:
The invention provides a novel method of manufacturing a sacrificial anode rod assembly for cathodically protecting the internal surfaces of ferrous metal water-containing vessels, such as water heater tanks, which method provides an elongated anode rod member of a galvanically active metal and an externally threaded cap member wherein the anode rod member and cap member are connected in a tightly locked, leakproof engagement which not only results in superior mechanical and electrical properties of the anode assembly but also aids substantially in prolonging the effective life of the anode rod assembly. In the method of forming the assembly, the cap member which has an internal recess is positioned onto the extremity of the anode rod and axially aligned therewith. Through the application of a force applied to the cap member, the metal in the extremity of the anode rod is subjected to a metallurgical upsetting operation while not affecting or damaging the integrity of the external surfaces of the cap member or its external threads. The instant method causes the metal of the extremity of the anode rod member to conform to the shape of the internal recess or bore of the cap member (which recess has at least one enlarged portion remote from its opening). For further increasing the effective life of the anode rod assembly, the method also advantageously provides for forming a bulged or enlarged portion of anode metal at the base of the cap member.
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patent: 2313312 (1943-03-01), Bakewell
patent: 2486936 (1949-11-01), Fergus
patent: 2683095 (1954-07-01), Paucek
patent: 3209437 (1965-10-01), Voorhies
patent: 3332867 (1967-07-01), Miller et al.
patent: 3558463 (1971-01-01), Strobach et al.
Calrow Paul E.
Hansen Frank M.
Kaiser Aluminum & Chemical Corporation
Moon Charlie T.
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