Metal working – Method of mechanical manufacture – Heat exchanger or boiler making
Reexamination Certificate
2006-07-25
2010-12-28
Chang, Rick K (Department: 3726)
Metal working
Method of mechanical manufacture
Heat exchanger or boiler making
C029S890047, C029S890043, C029S890038, C029S890045, C029S890040, C165S178000, C165SDIG049
Reexamination Certificate
active
07856716
ABSTRACT:
A method for assembling a plurality of tubes to a tubesheet. A first end of each of the tubes is situated over a corresponding support rod that extends from a pattern block of the fixture. A first end of a plurality of locating members is inserted into a second end of each of the tubes such that a second end of the locating member extends from the tube second end. The tubesheet is then slid over the locating members and tubes such that each of a plurality of holes in the tubesheet receive corresponding ones of the tubes.
REFERENCES:
patent: 1742414 (1930-01-01), Rogers
patent: 3789479 (1974-02-01), Zifferer
patent: 4405012 (1983-09-01), Mach
patent: 4607423 (1986-08-01), Sleep, Jr.
patent: 4839950 (1989-06-01), Stroup
patent: 5442853 (1995-08-01), Kroger et al.
patent: 6138747 (2000-10-01), Kroger et al.
patent: 01034623 (1998-06-01), None
Chang Rick K
Liebert Corporation
Locke Lord Bissell & Liddell LLP
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