Pipe joints or couplings – Essential catch
Reexamination Certificate
1999-05-20
2001-04-17
Arola, Dave W. (Department: 3627)
Pipe joints or couplings
Essential catch
C285S368000, C285S374000, C285S404000
Reexamination Certificate
active
06217084
ABSTRACT:
The present invention relates to a device on a conduit end and an arrangement for joining conduits.
Many methods are known for joining components for fluid pipes, e.g. conduits. One method aims at welding or soldering collars in/to the conduit ends, between which collars a flat packing is clamped by means of bolts which are screwed through flanges attached to the conduits. The bolts must be forcefully tightened so as to achieve a satisfactory seal. In another method, conical sockets instead of collars are welded/soldered to the conduit ends which are joined by means of corresponding conical couplings, the conduits and the coupling being also in this case interconnected by means of bolts that are screwed through flanges. Sealing is effected by means of O rings arranged in grooves in the sockets. Obviously the methods require a relatively large number of components and relatively great efforts and are cost-intensive also for the reason that a relatively expensive material, such as copper, brass or steel, must be used. A less expensive piping is obtained with aluminium, use being made of conduits with protruding ends and coupling components which are die-cast and formed with threads but which must be machined owing to the fact that small tolerances are required for obtaining a satisfactory seal with the flat packing when the fluid has operating pressure. The machining operation involves a risk that the die-cast material obtains pores, thereby causing leakage in the coupling component.
An object of the invention is to provide a device which permits joining of conduits in an inexpensive and efficient manner and which does not result in a reduction of the inner cross-section of the conduits which are joined together.
The object is achieved by a device and an arrangement according to the claims.
REFERENCES:
patent: 245263 (1881-08-01), Robb
patent: 552319 (1895-12-01), Farrey
patent: 3223438 (1965-12-01), DeCenzo
patent: 3282612 (1966-11-01), Younger
patent: 3402945 (1968-09-01), Rittenhouse
patent: 3523701 (1970-08-01), Graham
patent: 3584902 (1971-06-01), Vyse
patent: 3596934 (1971-08-01), DeCenzo
patent: 3753582 (1973-08-01), Graham
patent: 3913954 (1975-10-01), Klimpl
patent: 3929356 (1975-12-01), DeVincent et al.
patent: 3929357 (1975-12-01), DeVincent et al.
patent: 4035005 (1977-07-01), DeVincent et al.
patent: 4055359 (1977-10-01), McWethy
patent: 4431218 (1984-02-01), Paul, Jr. et al.
patent: 4524995 (1985-06-01), Bartholomew
patent: 4526411 (1985-07-01), Bartholomew
patent: 4570980 (1986-02-01), Goward
patent: 4768587 (1988-09-01), Halder
patent: 5046765 (1991-09-01), Usui
patent: 5211427 (1993-05-01), Washizu
patent: 5462313 (1995-10-01), Rea et al.
patent: 5542716 (1996-08-01), Szabo et al.
patent: 5593187 (1997-01-01), Okuda et al.
patent: 5607192 (1997-03-01), Lee
patent: 5718463 (1998-02-01), Hollnagel
patent: 5904221 (1999-05-01), Breitweg et al.
patent: 1918772 (1970-10-01), None
patent: 3642149 (1987-07-01), None
patent: 3531926 (1988-07-01), None
patent: 4333273 (1994-11-01), None
patent: 0 287 791 (1988-10-01), None
patent: 0 444 857 (1991-09-01), None
patent: 1 494 669 (1977-12-01), None
patent: 176889 (1989-07-01), None
patent: 369 767 (1974-09-01), None
patent: 386967 (1976-08-01), None
patent: 8000082 (1981-08-01), None
Larsson Bengt I.
Svensson Viveca
Arola Dave W.
Dresser Wayne Aktiebolag
Haynes and Boone LLP
LandOfFree
Device on a conduit end and arrangement for joining conduits does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Device on a conduit end and arrangement for joining conduits, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Device on a conduit end and arrangement for joining conduits will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-2499996