Pipe joints or couplings – Packed – Sleeve
Reexamination Certificate
1998-11-12
2001-01-30
Browne, Lynne H. (Department: 3629)
Pipe joints or couplings
Packed
Sleeve
C285S420000, C285S191000, C285S125100
Reexamination Certificate
active
06179349
ABSTRACT:
FIELD OF THE INVENTION
The present invention pertains in general to the units for channeling and distributing fluids which are either gaseous or liquid, under pressure or under vacuum, and it pertains more specifically to a system of elements for a modular connection, in line or at an angle, of pipelines which consist of extruded pipe sections for such units.
BACKGROUND OF THE INVENTION
The use of extruded hollow bars made of aluminum or the alloys thereof as pipelines in the units for channeling and distributing gaseous or liquid fluids, such as air, gas, oils, water, etc. has already been proposed. These bars have usually at least one longitudinal hole and grooves along the sides of the perimeter defined by longitudinal beads or fins obtained from the extrusion. The bars thus shaped can be connected, in line or at an angle, with other identical hollow bars with the aid of round tubular joints, which are inserted in a fluid-tight manner into the hole of the adjacent bars and with connecting plates which are joined and are locked by means of screws in the outer grooves of the bars to be connected.
However, such a method for constructing pipelines for fluids is complex, labor-intensive, burdensome and not without disadvantages. This method involves the use of extruded hollow bars that have a relatively large and elaborate cross section given the presence of the fins or the faces which must delimit the outer grooves for anchoring the connecting plates. Thus, the bars will be relatively bulky and heavy, and given their profile, are difficult, if not impossible, to bend, where necessary, without modifying the profile of the section in the bent part. In addition, the connecting plates are also complex and require counter-plates for the locking in the outer grooves of the section.
SUMMARY AND OBJECTS OF THE INVENTION
The main object of the present invention is to propose a novel system for the modular joining of pipelines consisting of extruded pipe sections, which system is simpler, easier, faster and more economical to carry out and yet does ensure the maximum efficiency and reliability of the resulting unit.
Another object is to propose a system for forming units for the channeling and distribution of fluids with the use of extruded section pipes, which have a simpler cross section, are less bulky and are lighter with the same central hole and fluid output as the prior-art bars and with the aid of locking means, which are simpler and more efficient.
These objects are accomplished with a pipe connection system which in its basic form includes first and second pipe sections having longitudinal passages and outer walls. A joint is insertable into the longitudinal passages of the first and second pipe sections. A clamp means engages with a gripping means on the outer walls of the pipes for clamping the first and second pipe sections together, and mechanically locking the first and second pipe sections together with the clamp means.
The gripping means of the pipe sections includes a plurality of longitudinal gripping shoulders, each gripping shoulder forming an acute angle with one of the flat outer walls to which the gripping shoulder is joined. The clamp means includes two blocks arranged side by side and connected transversely by locking screws.
Each of the blocks have a dovetail face and have a sloped internal surface similar to the gripping shoulder. The dovetail faces engage with the gripping shoulders when the blocks are pressed together by the locking screws.
The various features of novelty which characterize the invention are pointed out with particularity in the claims annexed to and forming a part of this disclosure. For a better understanding of the invention, its operating advantages and specific objects attained by its uses, reference is made to the accompanying drawings and descriptive matter in which preferred embodiments of the invention are illustrated.
REFERENCES:
patent: 5116161 (1992-05-01), Faisst
patent: 5494370 (1996-02-01), Habicht et al.
patent: 5769460 (1998-06-01), Imai
patent: 5785359 (1998-07-01), Nagai et al.
patent: 5806897 (1998-09-01), Nagai et al.
patent: 5938245 (1999-08-01), Guzzoni
patent: 2246609 (1992-05-01), None
Browne Lynne H.
Dunwoody Aaron
McGlew and Tutle, P.C.
Teseo S.r.l.
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