Electric heating – Metal heating – Of cylinders
Reexamination Certificate
2007-08-07
2007-08-07
Tran, Len (Department: 1725)
Electric heating
Metal heating
Of cylinders
C219S061110, C219S078160
Reexamination Certificate
active
11169293
ABSTRACT:
One method for welding includes obtaining a heat-exchanger tube having an outward fold. The tube is inserted at least partially through the orifice of a tubesheet with the fold contacting one of the outward and inward facing sides of the tubesheet. A first electrode is positioned in contact with the outward fold and a second electrode in contact with the one side of the tubesheet. Another method for welding includes obtaining a heat-exchanger tube having a tube end. The tube is inserted at least partially through the orifice of a tubesheet. A first electrode is positioned in contact with the first tube end and a second electrode is positioned in contact with one of the outward and inward facing sides of the tubesheet. The first electrode is moved against the first tube end to create an outward fold with the outward fold contacting the one side of the tubesheet.
REFERENCES:
patent: 1292812 (1919-01-01), Lachman
patent: 2106272 (1938-01-01), Elsey
patent: 2277871 (1942-03-01), Mitchell et al.
patent: 2326296 (1943-08-01), Harrison
patent: 2447259 (1948-08-01), Lucke
patent: 2614198 (1952-10-01), Avery et al.
patent: 2824212 (1958-02-01), Roberts
patent: 3503474 (1970-03-01), Raab
patent: 3585345 (1971-06-01), Jepersen
patent: 3618817 (1971-11-01), Troughton
patent: 3784260 (1974-01-01), Araya
patent: 3784778 (1974-01-01), McPherson et al.
patent: 4185369 (1980-01-01), Darrow et al.
patent: 4231488 (1980-11-01), Ward et al.
patent: 4269106 (1981-05-01), Leibhard et al.
patent: 4273983 (1981-06-01), Ogawa et al.
patent: 4322598 (1982-03-01), Blair
patent: 4408112 (1983-10-01), Kazlauskas
patent: 4427869 (1984-01-01), Kimura et al.
patent: 4480166 (1984-10-01), Leech
patent: 4496410 (1985-01-01), Davis et al.
patent: 4514614 (1985-04-01), Stol
patent: 4648811 (1987-03-01), Tahata et al.
patent: 4676427 (1987-06-01), Constance
patent: 4677271 (1987-06-01), Opprecht
patent: 4769624 (1988-09-01), Merritt et al.
patent: 5204491 (1993-04-01), Aureal et al.
patent: 5374800 (1994-12-01), Yoneda
patent: 5386923 (1995-02-01), Nakashima et al.
patent: 5538076 (1996-07-01), Nishida et al.
patent: 5540192 (1996-07-01), Xanders
patent: 5649039 (1997-07-01), Benzoni et al.
patent: 5786548 (1998-07-01), Fanucchi et al.
patent: 5831235 (1998-11-01), Cecil
patent: 5896960 (1999-04-01), Ananthanarayanan
patent: 6089617 (2000-07-01), Craig et al.
patent: 6130502 (2000-10-01), Kobayashi et al.
patent: 6186696 (2001-02-01), Valin
patent: 6287513 (2001-09-01), Grady et al.
patent: 6370740 (2002-04-01), Foreman
patent: 6390124 (2002-05-01), Kido et al.
patent: 6476543 (2002-11-01), Mera et al.
patent: 6539837 (2003-04-01), Fanelli et al.
patent: 6552294 (2003-04-01), Ananthanarayanan et al.
patent: 6586110 (2003-07-01), Obeshaw
patent: 6615488 (2003-09-01), Anders et al.
patent: 6623048 (2003-09-01), Castel et al.
patent: 6654995 (2003-12-01), Wang et al.
patent: 6689981 (2004-02-01), Ananthanarayanan et al.
patent: 6693251 (2004-02-01), Ananthanarayanan et al.
patent: 6705438 (2004-03-01), Ananthanarayanan et al.
patent: 6717091 (2004-04-01), Ananthanarayanan et al.
patent: 6791051 (2004-09-01), Ananthanarayanan et al.
patent: 6791052 (2004-09-01), Ananthanarayanan et al.
patent: 2002/0008387 (2002-01-01), Vasudeva
patent: 2002/0162651 (2002-11-01), Nakagome et al.
patent: 2003/0196715 (2003-10-01), Sakamoto et al.
patent: 2004/0035504 (2004-02-01), Ananthanarayanan et al.
patent: 2004/0035829 (2004-02-01), Ananthanarayanan et al.
patent: 2004/0035830 (2004-02-01), Ananthanarayanan et al.
patent: 2004/0035832 (2004-02-01), Ananthanarayanan et al.
patent: 2004/0035833 (2004-02-01), Ananthanarayanan et al.
patent: 2004/0035834 (2004-02-01), Ananthanarayanan et al.
patent: 2004/0056001 (2004-03-01), Ananthanarayanan et al.
patent: 2806287 (1979-08-01), None
patent: 4209218 (1993-11-01), None
patent: 0884501 (1998-12-01), None
patent: 55-136584 (1980-10-01), None
patent: 55-136593 (1980-10-01), None
patent: 08193577 (1996-07-01), None
patent: 08215859 (1996-08-01), None
patent: WO 2004/019377 (2004-03-01), None
patent: WO 2004/028730 (2004-04-01), None
Resistance Welding Encyclopedia Britannica Online http://www.search.eb.com/eb/article?query=resistance+welding&eu=78503&.
Ananthanarayanan Venkatasubramanian
Johnson Kenneth E
Pawlak Andrzej Marian
Payne James M.
Sharma Deepak K.
Delphi Technologies Inc.
Griffin Patrick M.
Tran Len
LandOfFree
Method for welding heat exchanger tube to tubesheet does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Method for welding heat exchanger tube to tubesheet, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Method for welding heat exchanger tube to tubesheet will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-3839718