Robert J Osborn

US Patent:

53738969, Dec 20, 1994

Filed:

Sep 15, 1993

Appl. No.:

8/122056

Inventors:

Robert J. Osborn - Orange CT

Assignee:

The Allen Group - New Haven CT

International Classification:

F28F 902

US Classification:

165173

Abstract:

A heat exchanger includes a metal tank having an open side and a flange around the open side, and a metal header plate connected to a plurality of heat exchanging tubes, the header plate having a channel around its periphery for mating with the tank flange. The cast metal tank has predominately thin walls and at least one cast indentation point for starting a drilled hole. The indentation point is located in a defined, limited region of the tank walls having a thickness greater than surrounding wall regions. The indentation point may be drilled out and, optionally, tapped, to form an additional access opening in the tank.

US Patent:

52576620, Nov 2, 1993

Filed:

Mar 27, 1992

Appl. No.:

7/859108

Inventors:

Robert J. Osborn - Orange CT

Assignee:

The Allen Group Inc. - New Haven CT

International Classification:

F28F 902

US Classification:

165173

Abstract:

A heat exchanger includes a metal tank having an open side and a flange around the open side, and a metal header plate connected to a plurality of heat exchanging tubes, the header plate having a channel around its periphery for mating with the tank flange. An elastomeric gasket completely fills the space between the flange and the channel for restricting contact of coolant with tank and header plate surfaces therebetween and reducing crevice corrosion. The cast metal tank has predominately thin walls and at least one cast indentation point for starting a drilled hole. The indentation point is located in a defined, limited region of the tank walls having a thickness greater than surrounding wall regions. The indentation points or other openings in the tank walls may be relocated by cutting and welding them in different locations to accommodate different configurations in low volume production.