Patents Assigned to Scot Industries, Inc.
  • Patent number: 5196108
    Abstract: A method is shown for constructing portions of a sucker rod pump of the type having a steel plunger with an exterior cylindrical wall and a barrel with a cylindrical bore. A chromium case if formed on the cylindrical bore to a selected depth for receiving the plunger in sliding contact. The chromium case is formed by forming a base electrolyte bath including water, chromic acid, a sulfate component, an alkyl sulphonic acid, and an anion of molybdenum. The bore is then exposed to the aqueous electrolyte bath at a current density and at a plating temperature sufficient to form a chromium deposit of desired thickness on the bore.
    Type: Grant
    Filed: April 24, 1991
    Date of Patent: March 23, 1993
    Assignee: Scot Industries, Inc.
    Inventors: Thomas S. Wilmeth, Jesse L. Eades
  • Patent number: 5009000
    Abstract: A method of hardening a sucker rod well pump has a step of forming a boronized case on the plunger. Then the plunger is heated and quenched to form a hardened steel supporting layer. A chromium case is formed on the barrel.
    Type: Grant
    Filed: July 19, 1989
    Date of Patent: April 23, 1991
    Assignee: Scot Industries, Inc.
    Inventors: Thomas S. Wilmeth, Steven L. Wilmeth, Francis E. Foster