Pipe joints or couplings – End to side or plate – Saddle-type clamp
Reexamination Certificate
1998-11-24
2001-02-20
Arola, Dave W. (Department: 3627)
Pipe joints or couplings
End to side or plate
Saddle-type clamp
C285S210000, C285S906000
Reexamination Certificate
active
06189937
ABSTRACT:
FIELD OF THE INVENTION
The present invention relates to a fitting for the attachment of a pipe or other fitting to a another pipe.
BACKGROUND OF THE INVENTION
Baghouse filtering systems use air compressed by a compressor and stored in a header tube or pipe awaiting use for cleaning of a filter bag or filter cartridge in the baghouse. The air flow to a filter is controlled by means of solenoid valves and these solenoid valves connect the header and a blow tube. Such a connection is performed by providing a seat on the header tube to attach the solenoid valve. The solenoid valves are of a right angled construction allowing relatively easy installation and removal where existing pipes and fittings are in place.
To construct a conventional outlet fitting onto a header tube requires labour intensive processes by the welding of one pipe onto another to provide the flanged seat. This first requires the drilling of a hole in the header tube approximately the same size as the pipe being connected, then welding accurately around the intersection of the two pipe surfaces. At the end of the smaller pipe (which is welded to the bigger pipe) is a flanged surface upon which can be attached the solenoid valve.
These assembly and fabrication operations are costly and expensive.
SUMMARY OF THE INVENTION
The invention further provides a fitting having at least one securing means to sealably secure said fitting to a hole in a conduit, said fitting having a conduit engaging end and a mounting surface at another end, said fitting being shaped to cooperate with an external surface of said conduit, said fitting including an aperture which communicates between said conduit engaging end and said mounting surface, said fitting including at least one sealing surface surrounding said aperture in said conduit engaging end which is adapted to make sealing contact with a resiliently compressible seal, said at least one securing means depending from said fitting to engage an internal surface of said conduit in the vicinity of said hole in said conduit, said at least one securing means when securing said fitting to said conduit thereby compressing said resiliently compressible seal between said at least one sealing surface and said external surface of said conduit and sealing, said fitting to said conduit.
Preferably a centering means is provided which keeps said first aperture in said conduit engaging end centred on said hole in said conduit.
Preferably there are two securing means.
Preferably the two securing means are diametrically opposed.
Preferably if said fitting is to engage a cylindrical surface, the centering means is provided by said two securing means being diametrically opposed and positioned so as to engage the circumference of said hole in said conduit approximately along an imaginary line parallel to the longitudinal axis of said conduit, running along said internal or external surface of said conduit, said imaginary line also being parallel to, collinear or co-incident with a diameter of said hole, whereby said hole interacts with said securing means and said conduit engaging end of said fitting to prevent circumferential movement of said fitting relative to conduit.
Preferably if said fitting is to engage a flat surface, said centering means are diametrically opposed and are located in two quadrants of said aperture in said conduit engaging end which do not include said two securing means.
The invention further provides a fitting on to which can be mounted a flanged conduit or other component, said fitting having a body which cooperates with a hole in a second conduit so that said fitting sealingly attaches to said second conduit, said fitting having an aperture through it which will have communicable passage with said hole in said conduit, said fitting being characterised by including securing means depending from formations in said aperture which, when secured, clamp the wall of said second conduit between said securing means and said fitting.
The embodiment of the above invention provides an improved assembly system to assemble the fitting into a hole on a conduit. This can be done without drilling a second hole in the diametrically opposite side of the conduit. Once the fitting is attached either a valve can be attached or alternatively another tube or flanged tube can be attached to which a valve can also be connected.
The invention also provides a securing member which interacts with a fitting to which it is to be attached so as to secure said fitting to a hole in a conduit, said securing member including a body portion having a base, an upper surface spaced from said base, a longitudinal axis which is generally perpendicular to planes including said base and said upper surface, a securing means positioned on or around said axis, a first curved side having a first radius of curvature in at least a first and second quadrant around said longitudinal axis of said body portion, and a second curved side having a second radius of curvature in a third quadrant positioned adjacent to said second quadrant, with four quadrants being divided by two planes which intersect along said longitudinal axis, said second radius of curvature preventing said body portion from rotating in only one direction when said body portion is positioned adjacent to or in contact with a surface, said body portion including a third curved surface bridging said second and third quadrants having a radius of curvature which revolves around an axis or rotation which lies substantially at a right angle to said longitudinal axis and which also lies in a plane which separates said second and third quadrants, said third curved surface being positioned above said base but below said upper surface and said radius of curvature of said third curved surface being measured in the direction from said base to said upper surface.
Preferably said securing means is a threaded bore through said body portion having a central axis which is coincident with said longitudinal axis.
Preferably said securing member is able to be, via said securing means, initially rotatably attached to a fitting so as to secure said fitting to a hole in a conduit.
Preferably said second radius of curvature greater than said first radius of curvature, or is so much greater than said first radius of curvature that it could appear as a straight line, or be a straight line.
Preferably said second side shaped or sized so that when said rotatable securing member is positioned next to a hole in a conduit and said securing member is not able to be rotated further in one direction, said second side is engaging a surface of said hole.
Preferably when said second side is engaging said surface of a hole, said plane dividing said second and third quadrants is positioned relative to said conduit so as to include a central longitudinal axis of said conduit, or be parallel to a central longitudinal axis of said conduit when viewed in a central axis of said hole in said conduit.
Preferably said third curved surface has its maximum distance measured perpendicularly from said base located in said plane separating said second and third quadrants.
Preferably said third curved surface has a radius of curvature which is substantially equivalent in size to the radius of curvature of an internal surface of said conduit.
Preferably said third curved surface is located on an end of a formation which is attached or integrally formed with said body portion.
Preferably said third curved surface is elongated in the direction of extension of said curvature.
Preferably the length of said third curved surface extends passed said body portion.
REFERENCES:
patent: 978504 (1910-12-01), Stewart
patent: 2945705 (1960-07-01), Murray
patent: 4023833 (1977-05-01), Wellard
patent: 4699217 (1987-10-01), McLennan et al.
patent: 5586789 (1996-12-01), Bently
patent: 14773/33 (1933-10-01), None
patent: 16457/56 (1956-09-01), None
patent: 65144/69 (1971-08-01), None
patent: 2550202 (1977-02-01), None
patent: 2120340 (1983-11-01), None
Arola Dave W.
Dykema Gossett PLLC
Goyen Controls, Co.
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