Edward J Bender

US Patent:

20070251684, Nov 1, 2007

Filed:

Apr 27, 2006

Appl. No.:

11/380456

Inventors:

Edward Bender - Peru IN, US
Thomas Moore - Bunker Hill IN, US

Assignee:

Burnham Services, Inc. - Wilmington DE

International Classification:

F28F 9/04
F16L 23/00

US Classification:

165178000, 285405000

Abstract:

A one-piece tube for use as a watertube within a watertube boiler or heat exchanger has a free end section that is formed to have an integral, outward-extending circumferential ring, or flange, a spaced distance from an adjacent end face of the tube. This is preferably accomplished by radially expanding the tube within the free end section and by axially compressing the free end section to cause a portion of the tube to bulge radially outward to from the circumferential ring, or flange. The flange enables the watertube to be readily driven into engagement with a dome, manifold or like casting without the creation of leaks, such as weld leaks. The free end section of the tube that extends from the circumferential ring, or flange, to the adjacent end face of the tube can be formed with a taper such that the diameter of an outer wall of the tube progressively decreases from the circumferential ring, or flange, to the end face. A boiler or heat exchanger having the above described watertube and a method of assembly are also provided.

US Patent:

20100071635, Mar 25, 2010

Filed:

Oct 6, 2009

Appl. No.:

12/573898

Inventors:

Thomas Wayne MOORE - Bunker Hill IN, US
Edward A. BENDER - Peru IN, US

Assignee:

BURNHAM HOLDINGS, INC. - Lancaster PA

International Classification:

F22B 37/10

US Classification:

12223514, 12223515

Abstract:

A one-piece tube for use as a watertube within a watertube boiler or heat exchanger has a free end section that is formed to have an integral, outward-extending circumferential ring, or flange, a spaced distance from an adjacent end face of the tube. A boiler is provided that has an elongate header and a plurality of separate watertubes each having an intermediate section and opposite end sections. An end section of each watertube is connected to the header. The intermediate section of each watertube has a substantially constant outer diameter along its full length and is closely spaced to adjacent watertubes within the combustion chamber. At least one of the end sections of each watertube has a transition that reduces the diameter of the watertube as it extends from the intermediate section to an outwardly-extending circumferential flange. This arrangement permits close spacing of the connection sites of the watertubes to the header and permits the connection sites to be provided in a linear array.