Pipe joints or couplings – Packed – Cam
Reexamination Certificate
1999-07-13
2001-11-13
Nicholson, Eric K. (Department: 3627)
Pipe joints or couplings
Packed
Cam
C285S376000
Reexamination Certificate
active
06315334
ABSTRACT:
TECHNICAL FIELD
The present invention relates to devices for joining lengths of pipe together.
SCOPE OF THE INVENTION
A new system for the immediate joining of lengths of pipe is presented whose characteristics allow the handling of the liquid without leaks or losses, as well as being able to be disassembled in the same way and conserve it once it has been used.
Therefore, one purpose of this invention is to provide a rapid joining system for lengths of pipe.
Another goal of this invention is to be able to join and separate lengths of pipe immediately without the need to utilize specialized tools.
Another objective of this invention is to be able to utilize the pipes for the suitable handling of fluids wherein due to their nature, they have to be changed from place to place and in some cases even removed.
This invention has its field of action among pipes, connections, accessories and adapters for pipes.
BACKGROUND ART
Several decades ago it was traditional for good plumbing installations in houses and buildings to be made of cast iron pipes and steel pipes for factory installations. In the case of handling fluids whose management is instantaneous, hoses have been utilized and for irrigation management, complex systems which include wheels, sprinklers and rigid pipes have been used.
Many of the methods followed to join pipes to their connections utilize crafts methods, which means they require specialized and thus expensive labor, as well as the use of joining materials, such as tarred marline and braid, leads, soldering compounds, and other products.
Around the years 1600 or 1700 cast iron pipes started to be used and it wasn't until 1930 in Germany when plastic pipes were used for the first time, specifically PVC although its acceptance and use became gradually more generally derived from the efficient technology utilized in the manufacture of materials, as well as due to the discovery and application of new plastic resins.
Plastic pipes and connections are produced from polymeric resins that basically come from the petrochemical industry. This resins when mixed with other materials such as stabilizers, lubricants, modifiers and pigments, have a combination of characteristics that allow them to be molded by extrusion to make pipes, and by injection to obtain connections and accessories.
Along another line of thinking, processes exist in which the spontaneous handling of fluids is required, and in many cases hoses are utilized. However, in some cases the use of threaded type pipes is more convenient.
The same can be said for pipes for irrigation, which due to their very nature have to be changed from place to place.
Threaded pipes are utilized for the described purposes, although these have the disadvantage that they have to be assembled and disassembled, above all when they have to moved from place to place, such as in the case of irrigation.
There are also plastic pipes on the market which are coupled together by means of a bell and spigot with a rubber ring, having the great advantage of acting as an expansion joint to absorb the contractions and expansions caused by changes in temperature as well as possessing adequate airtightness. However, to achieve this, a cement must be utilized.
Joining systems have also been developed using quick joints, which use hose clamps with a hook that adjusts the spigot to the bell.
The aforementioned disadvantages are simply solved using the proposed invention, which can advantageously compete against the other inventions described above, having as its unique characteristic the fact that it can be assembled and disassembled immediately.
SUMMARY OF THE INVENTION
The present invention is a system for the immediate joining of lengths of pipe together. The system uses a length of pipe with ends of different geometry. One end has a bulge with a greater diameter and is the female connection. The other end has several protuberances and is the male connection. The female connection has a non-circular hole on nits front. In particular, the female connection has several cut-outs placed in an equidistant manner from each other and which correspond to the protuberances on the male connection. A channel is formed in this end. A gasket is received in an annular section at this end.
REFERENCES:
patent: 25117 (1859-08-01), Heneage
patent: 744646 (1903-11-01), Tietz
patent: 794539 (1905-07-01), O'Brien
patent: 795069 (1905-07-01), Settlage
patent: 1194793 (1916-08-01), Styers
patent: 1232193 (1917-07-01), Bowles
patent: 1309830 (1919-04-01), Wanamaker
Harrison & Egbert
Nicholson Eric K.
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