Ronald E Gilbert

US Patent:

50785729, Jan 7, 1992

Filed:

Jan 19, 1990

Appl. No.:

7/467485

Inventors:

Lutfi Amra - Cleveland Heights OH
Ronald E. Gilbert - Chardon OH
George S. Mordue - Ravenna OH

Assignee:

The Carborundum Company - Niagara Falls NY

International Classification:

F04D 2970

US Classification:

4151212

Abstract:

A molten metal pump includes a filter that prevents ingestion of foreign material such as dross from molten metal within which the pump is immersed. The filter is a large structure that is secured to the base of the pump surrounding the pump's inlet. The filter forms a cavity adjacent the pump's inlet. The filter has a low porosity while maintaining a high flow rate for the pump. The filter is a semi-toroidal structure that is attachable to a pump base having an upper inlet. The filter surrounds the pump's inlet. The filter includes a central opening through which access can be had to the pump's impeller for purposes of inspection, repair, or replacement without disturbing the attachment between the filter and base.

US Patent:

52861635, Feb 15, 1994

Filed:

Jun 5, 1990

Appl. No.:

7/532889

Inventors:

Lutfi Amra - Cleveland Heights OH
Ronald E. Gilbert - Chardon OH
George S. Mordue - Ravenna OH

Assignee:

The Carborundum Company - Niagara Falls NY

International Classification:

F04D 2970

US Classification:

4151212

Abstract:

A molten metal pump includes a filter that prevents ingestion of foreign material such as dross from molten metal within which the pump is immersed. The filter is a large structure that is secured to the base of the pump surrounding the pump's inlet. The filter forms a cavity adjacent the pump's inlet. The ratio of the surface area of the filter to the inlet area of the pump is very large due in part to a corrugated end wall included as part of the filter. The filter has a low porosity while maintaining a high flow rate for the pump.

US Patent:

47475838, May 31, 1988

Filed:

Jun 10, 1987

Appl. No.:

7/061025

Inventors:

Eliott B. Gordon - Cleveland Heights OH
David V. Neff - Cleveland Heights OH
Paul V. Cooper - Cleveland OH
Ronald E. Gilbert - Chardon OH

International Classification:

F27B 1410

US Classification:

266235

Abstract:

A method of melting metal particles includes the steps of swirling molten metal in a vortex within a crucible, adding metal particles onto the surface of the metal, and submerging the metal particles substantially immediately after the particles have been added onto the surface. Apparatus for carrying out the method includes a mixer having a vertically oriented sleeve secured to the bottom of the crucible, the sleeve supporting a plurality of blades on its outer surface and having a plurality of openings adjacent its bottom. The blades force the metal particles beneath the surface of the metal and create turbulence which ensures rapid melting of the particles. The blades as well as the openings adjacent the bottom of the sleeve break up any agglomerated metal particles. Discharge piping is connected to the bottom of the crucible. A vortex breaker is disposed in the piping to control the vortex in the crucible.