Insert for heat exchanger tube

Details Insert for heat exchanger tube Insert for heat exchanger tube

2007-08-14

2007-08-14

Leo, Leonard R. (Department: 3744)

Heat exchange

Tubular structure

C165S109100, C165S146000, C165S166000, C165S916000

Reexamination Certificate

active

10772067

ABSTRACT:
An insert adapted to connect to opposite walls in a heat exchanger tube, including a corrugated sheet having alternating wave crests and wave troughs connected by wave flanks having openings therein, wherein at least some of the wave crests have a length different than the length of the wave troughs, and/or adjacent sections have different wavelength waves. Such inserts may be produced by transporting material sheets through a press, where the sheet feed rate and/or the press stroke speed may be selectively varied.

REFERENCES:
patent: 3016921 (1962-01-01), Tadewald
patent: 3083662 (1963-04-01), Zeidler
patent: 3542124 (1970-11-01), Manfredo et al.
patent: 3992168 (1976-11-01), Toyama et al.
patent: 4049051 (1977-09-01), Parker
patent: 4815532 (1989-03-01), Sasaki et al.
patent: 6244334 (2001-06-01), Wu et al.
patent: 6273183 (2001-08-01), So et al.
patent: 29622191 (1997-03-01), None
patent: 0742418 (1996-04-01), None
patent: 04335993 (1992-11-01), None

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