Pipe joints or couplings – Swivel – With rotation limits
Reexamination Certificate
2002-09-13
2004-11-16
Bochna, David (Department: 3679)
Pipe joints or couplings
Swivel
With rotation limits
C285S903000, C285S404000, C285S276000
Reexamination Certificate
active
06817632
ABSTRACT:
BACKGROUND AND SUMMARY
The invention relates to flexible connector tubing, and more particularly to a flex tube joint providing torsion relief.
Connector tubing provided by flex tubes have various ducting and exhaust applications where the inlet and outlet are not aligned or otherwise have a tortuous flow path therebetween. It is common to provide spiral flex tubes for such applications.
It has been found that a significant cause of failure in flexible connector tube applications is torsional twisting of the flex tubes relative to each other. The twisting causes cracking or fracture of the tubes and/or the joint therebetween. The present invention addresses and solves this problem of torsion causing damage to the flex tubes. The present invention provides torsion relief by allowing the flex tubes to twist relative to each other, thus reducing torsion to a minimum. This extends the life expectancy of the flex tubes.
REFERENCES:
patent: 2898941 (1959-08-01), Kilcup
patent: 3330303 (1967-07-01), Fochler
patent: 3743328 (1973-07-01), Longfellow
patent: 4050721 (1977-09-01), Streit
patent: 4082327 (1978-04-01), Sting et al.
patent: 4106967 (1978-08-01), Logan et al.
patent: 4141576 (1979-02-01), Lupke et al.
patent: 4222594 (1980-09-01), Skinner
patent: 4303104 (1981-12-01), Hegler et al.
patent: 4420019 (1983-12-01), Dillon
patent: 4437691 (1984-03-01), Laney
patent: 4487232 (1984-12-01), Kanao
patent: 4758023 (1988-07-01), Vermillion
patent: 4865362 (1989-09-01), Holden
patent: 5039011 (1991-08-01), Parker
patent: 5056834 (1991-10-01), Scott et al.
patent: 5058934 (1991-10-01), Brannon
patent: 5228479 (1993-07-01), Thomas
patent: 5393260 (1995-02-01), Barth
patent: 5494319 (1996-02-01), Thomas
patent: 5727599 (1998-03-01), Fisher et al.
patent: 5765880 (1998-06-01), Goddard
patent: 5837083 (1998-11-01), Booth
patent: 5842727 (1998-12-01), Shade
patent: 6161591 (2000-12-01), Winter et al.
patent: 6186182 (2001-02-01), Yoon
Doyle Timothy M.
You Tao
Andrus Sceales Starke & Sawall LLP
Bochna David
Fleetguard Inc.
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