Pipe joints or couplings – With assembly means or feature – Inserted section
Reexamination Certificate
1999-11-26
2001-11-20
Nicholson, Eric K. (Department: 3627)
Pipe joints or couplings
With assembly means or feature
Inserted section
C285S423000, C285S915000
Reexamination Certificate
active
06318761
ABSTRACT:
BACKGROUND OF THE INVENTION
1. Field of the Invention
This invention relates primarily to the field of replacement fittings or couplings for substantially rigid, plastic pipes such as polyvinylchloride (PVC) pipes whose ends are fixed relative to each other or otherwise cannot be easily moved relative to each other.
2. Discussion of the Background
Replacing couplings or fittings between pipe ends that are fixed relative to each other or otherwise cannot be easily moved relative to each other presents special problems. Such pipes may have been initially coupled to each other in any number of easy and conventional manners (e.g., by a simple, open-ended socket coupler) when one or both of the pipes could be moved toward each other. However, once the coupled pipes are fixed in place (e.g., in the ground, in concrete, or to joists), replacing the coupling should it become broken or begin to leak becomes much more difficult. This is true because the pipes and their ends can no longer be moved (or at least not easily moved) relative to each other, particularly if the pipes are made of rigid material such as PVC. Consequently, in nearly all such cases, a replacement coupling must be used that will initially fit between the fixed ends of the pipes and then be outwardly adjustable or expandable to extend over the spaced-apart ends of the pipes.
Several replacement couplings or fittings exist which have telescoping members. In use, these couplings can be initially placed between the fixed ends of the pipes and then expanded or telescoped outwardly over the pipe ends. However, these couplings have a number of pieces or parts adding to both the cost and difficulty of using them. Further, these various pieces or parts are not initially linked or joined together and must be separately handled. Consequently, in use, it is first necessary for the installer to be sure he brings all of the necessary pieces and in the right sizes to the job site. Second, he must be careful at the job site not to drop or otherwise lose any of the separable pieces of the coupling. Such disadvantages can be critical. For example, the installer may find he does not have all of the necessary pieces (or in the right sizes) when he arrives at the job site. Additionally, in the usually tight quarters of the repair area, he may easily drop or lose one of the coupling pieces.
With this in mind, the replacement fitting of the present invention was developed. With it, all of the necessary pieces of the fitting are initially linked together into a single unit and cannot be inadvertently separated from one another. In use, the installer need only carry the single unit of linked pieces in one hand knowing all of the individual pieces of the fitting are there and are in the right sizes for each other. He also does not have to worry about dropping or otherwise losing any of the pieces on the way to the job site or at the site itself. Further, the repair can be accomplished with the fitting of the present invention by merely sliding individual sleeve members outwardly on a main body over the pipe ends.
SUMMARY OF THE INVENTION
The present invention involves replacement fittings for substantially rigid pipes. Each fitting preferably includes a main body with telescoping, sleeve members mounted on it. The sleeve members can be individually slid along the main body but cannot be removed from it. In this manner, the preferred fittings of the present invention can be handled as a single unit and all of the linked pieces will stay together and cannot be inadvertently left behind. They also cannot be accidentally lost or dropped on the way to the job site or during the repair operation. The various pieces of the fittings employ tapering surfaces that not only ensure the pieces will stay together while the fittings are being manipulated into position but also aid in creating the strongest bonds and seals with the pipes.
REFERENCES:
patent: H176 (1986-12-01), Johnstone, Jr.
patent: 591362 (1897-10-01), Sisson
patent: 666316 (1901-01-01), Kenneally
patent: 1933915 (1933-11-01), Lindquist et al.
patent: 2037812 (1936-04-01), McKendrick
patent: 2202312 (1940-05-01), Frances
patent: 2297966 (1942-10-01), Luff
patent: 2449803 (1948-09-01), Collison
patent: 2461828 (1949-02-01), Lomelino
patent: 2551393 (1951-05-01), Pinger
patent: 2595705 (1952-05-01), Rosecrans, Sr.
patent: 2641491 (1953-06-01), Mueller et al.
patent: 2871032 (1959-01-01), Woodling
patent: 3857588 (1974-12-01), Curtin
patent: 3865410 (1975-02-01), Chen
patent: 3971574 (1976-07-01), Curtin
patent: 4013309 (1977-03-01), Quick
patent: 4035002 (1977-07-01), Curtin
patent: 4386796 (1983-06-01), Lyall et al.
patent: 4521037 (1985-06-01), Knox
patent: 4687232 (1987-08-01), Zimmerman
patent: 4690434 (1987-09-01), Schmidt
patent: 4836581 (1989-06-01), Guilloteau
patent: 4858958 (1989-08-01), Harbeke
patent: 5039134 (1991-08-01), Meadows et al.
patent: 5090743 (1992-02-01), Obering
patent: 5487571 (1996-01-01), Robertson
patent: 5975587 (1999-11-01), Wood et al.
patent: 2135415 (1984-08-01), None
patent: 173261 (1921-12-01), None
patent: 378780 (1932-08-01), None
Carson W. Scott
Nicholson Eric K.
Robertson Duane D.
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