Liquid heaters and vaporizers – Water tube
Reexamination Certificate
2007-11-16
2010-11-09
Wilson, Gregory A (Department: 3749)
Liquid heaters and vaporizers
Water tube
C122S00600B
Reexamination Certificate
active
07827941
ABSTRACT:
To provide a boiler equipped with a water tube group performing heat recovery effectively and having expansion heating surfaces (fins or the like) of high durability, the present invention provides a boiler (1) including: a boiler body (10) having an inner water tube group (20) and an outer water tube group (30) that are arranged in an annular fashion; and a burner (40) arranged at a central portion of the inner water tube group (20), in which: intervals between adjacent inner water tubes constituting the inner water tube group (20) are closed except for portions where a gas flow passage is provided; and stud fins (22and32) are provided on a portion of at least one of the inner water tube group (20) and the outer water tube group (30) in a vicinity of the gas flow passage.
REFERENCES:
patent: 2298857 (1942-10-01), Clark
patent: 3633550 (1972-01-01), Kraus
patent: 4257358 (1981-03-01), Watanabe
patent: 4453496 (1984-06-01), Yoshinari
patent: 4471725 (1984-09-01), Holden
patent: 5199384 (1993-04-01), Kayahara et al.
patent: 5273001 (1993-12-01), Kayahara et al.
patent: 6116196 (2000-09-01), Watanabe et al.
patent: 6253715 (2001-07-01), Takubo et al.
patent: 6318305 (2001-11-01), Takubo et al.
patent: 6823821 (2004-11-01), Kayahara et al.
patent: 2-75805 (1990-03-01), None
patent: 10-220701 (1998-08-01), None
Birch & Stewart Kolasch & Birch, LLP
Miura Co., Ltd.
Wilson Gregory A
LandOfFree
Boiler does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Boiler, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Boiler will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-4218859