Gary J Halstead

US Patent:

51862433, Feb 16, 1993

Filed:

Jul 13, 1992

Appl. No.:

7/912377

Inventors:

Gary A. Halstead - Lockport NY

Assignee:

General Motors Corporation - Detroit MI

International Classification:

F28F 1314

US Classification:

165135

Abstract:

A combination radiator and condenser apparatus has a pair of extruded tank and header assemblies adapted to be connected in both a coolant system for liquid cooled engine and a refrigerant system of an automobile air conditioning system. The assemblies each include an extruded tank with two chambers separated by an internal partition which extends the full height of the tank. Each extruded tank further includes a slotted wall for receiving the ends of a plurality of unitary extruded fluid flow tubes extending between each extruded tank. Each of the unitary extruded fluid flow tubes has first and second passages therein connected respectively to the coolant chamber and the high pressure refrigerant chamber of each of the extruded tanks. An open-sided gap or channel extends within the partition and the length of the tank for reducing heat conduction between the coolant and refrigerant. The channel is open through a longitudinal wall of the extruded tank.

US Patent:

52898733, Mar 1, 1994

Filed:

Jun 22, 1992

Appl. No.:

7/902158

Inventors:

Richard P. Ryan - East Amherst NY
Gary A. Halstead - Lockport NY
Glenn W. Shaffer - Tuscaloosa AL
Shrikant M. Joshi - Cambridge MA

Assignee:

General Motors Corporation - Detroit MI

International Classification:

F28F 926

US Classification:

165149

Abstract:

A heat exchanger apparatus includes a pair of tank units for containing a fluid, such as an engine coolant, or freon, each including a header having a plurality of slots for receiving a plurality of parallel fluid flow tubes in fluid communication between the tanks. Air centers are connected between the parallel fluid flow tubes for directing an inlet air stream of the vehicle. Side plates are secured between the ends of the headers to protect and provide rigidity to the heat exchanger. Interlocking members are provided between the headers and sideplates for interlocking same to one another during the brazing process.

US Patent:

56923007, Dec 2, 1997

Filed:

Apr 17, 1995

Appl. No.:

8/423340

Inventors:

Paul Joseph Conn - Grand Island NY
Gary Asel Halstead - Lockport NY

Assignee:

S. A. Day Manufacturing Co., Inc. - Buffalo NY

International Classification:

B23P 1500

US Classification:

29890053

Abstract:

An improved method is provided for producing an aluminum tube of the type used as cooling tubes for heat exchangers, and particularly automotive heat exchangers. The method utilizes a flux-containing composition that can be selectively deposited in a manner that permits the manufacture of aluminum tubes having a lockseam construction. As a result, the method made possible by this invention provides for the manufacture of heat exchanger tubes that offer the weight, durability and safety advantages of aluminum alloy construction, but at lower investment, processing and material costs as compared to prior art welded aluminum tubes. Another advantage of the present method is that minimal amounts of braze alloy and flux are required, yet uniform and consistent brazed joints can be produced to yield leak-proof brazed assemblies.

US Patent:

51862468, Feb 16, 1993

Filed:

Jun 1, 1992

Appl. No.:

7/891067

Inventors:

Gary A. Halstead - Lockport NY

Assignee:

General Motors Corporation - Detroit MI

International Classification:

F28D 716

US Classification:

165140

Abstract:

A combination radiator and condenser apparatus has a pair of tank and header assemblies adapted to be connected in both a coolant system for liquid cooled engine and a refrigerant system of an automobile air conditioning system. The assemblies each include a tank with two compartments separated by an internal partition which extends the full height of the tank. Each tank includes a slotted header for receiving the ends of a plurality of unitary extruded fluid flow tubes extending between each extruded tank and each of the unitary extruded fluid flow tubes have first and second passages therein connected respectively to the coolant chamber and the high pressure refrigerant chamber of each tank. Each tank includes a unitary tank extrusion and separate header assembly connected thereto. The tank extrusion includes a pair of side walls with the partition therebetween.

US Patent:

51859254, Feb 16, 1993

Filed:

Jan 29, 1992

Appl. No.:

7/827679

Inventors:

Richard P. Ryan - East Amherst NY
Gary A. Halstead - Lockport NY
David M. Smith - Amherst NY
Shrikant M. Joshi - Cambridge MA

Assignee:

General Motors Corporation - Detroit MI

International Classification:

B23P 1526

US Classification:

29890049

Abstract:

A condenser having two piece die formed condenser tube parts that are joined along a beveled outer edge. The tube material is braze cladded on both sides for corrosion resistance and for high quality internal braze bonding of (1) longitudinal tube webs for optimizing burst strength, and (2) the tubes to associated air centers which are not cladded for an economical unit. The tubes can be readily made in a multiport or single port design by die forming the longitudinal webs in each tube part, and at discreet lengths along the tube length to provide a cut off area for sizing the tube and a smooth circumferential area where the tube parts with a beveled outer edge enter the header providing a close fit and high quality brazed joints. This tube design provides material and cost advantages over the conventional extruded tubes or roll formed condenser tubes and is readily fabricated using corrosion resistant alloys providing long service life. The number and spacing of the webs in this construction can be readily made by changing the spacing of the dies for forming the tube parts.

US Patent:

52264904, Jul 13, 1993

Filed:

Oct 26, 1992

Appl. No.:

7/966498

Inventors:

Richard P. Ryan - East Amherst NY
Gary A. Halstead - Lockport NY
David M. Smith - Niagara Falls NY

Assignee:

General Motors Corporation - Detroit MI

International Classification:

F28F 900

US Classification:

165173

Abstract:

A heat exchanger apparatus includes a pair of tanks with parallel tube passes and air centers connected therebetween for cooling the engine fluid, such as a coolant, by the air intake stream to the vehicle. The tanks are formed by an extrusion forming three sides thereof and a header is brazed thereto for forming the fluid chamber in the tanks. The extrusion includes a die formed pocket therein to receive the sides and one end of a partition member and the second end of the partition member is curved to abut the header. The curved second end has flanged ears therein that seat in segments of the die formed pocket which are laterally outwardly of spaced sides segments of the pocket to position the partition within the pocket so that an outer surface thereon will be positioned against a header to form a braze seal between the partition and both the header and the extruded tank.

US Patent:

52190170, Jun 15, 1993

Filed:

Jun 8, 1992

Appl. No.:

7/894976

Inventors:

Gary A. Halstead - Lockport NY
Ronald C. Treloar - Paris, FR

Assignee:

General Motors Corporation - Detroit MI

International Classification:

F28D 104
F28F 132
F28F 700
F28F 900

US Classification:

165 41

Abstract:

A heater of a vehicle includes a pair of tank units with fluid tube passes and air centers formed therebetween. The tank units include a separate tank extrusion and header. The tank extrusion comprises a generally U-shaped extrusion with recesses provided on the exterior side of the side walls of the U-shaped extrusion. A mounting flange extends from one side wall of each tank extrusion. The header includes deformable tabs which extend over the recesses to allow clinching of the header to the tank extrusion. The mounting flanges slide within notches of a plastic case in the air module for sealing and securing the heater to the module.

US Patent:

53222091, Jun 21, 1994

Filed:

Jul 19, 1993

Appl. No.:

8/092857

Inventors:

Brian L. Barten - Lockport NY
Gary A. Halstead - Lockport NY

Assignee:

General Motors Corporation - Detroit MI

International Classification:

B23K 3102

US Classification:

228183

Abstract:

The brazing process for an aluminum headered condenser is improved by adding a flux drying and preheating process that both dries the wet flux layer and prepares the part for more efficient brazing. An oven is divided into two directly connected zones, one that dries the flux layer at a lower temperature, and one that preheats the condenser at a higher temperature that is still too low to melt the flux layer. Both the tanks and the core of the condenser are heated hotter than they would be if they were only flux dried, although the core is heated significantly more. The preheated parts are then transported to the braze furnace indirectly, through ambient, which serves to cool the core more than the tanks, to a temperature lower than the tanks. Finally, the part is run through a normal braze cycle. Because the tanks begin hotter than normal, they reach braze melt temperature sooner than they normally would.