Pipe joints or couplings – End to side or plate – Saddle-type clamp
Patent
1991-07-24
1994-12-20
Arola, Dave W.
Pipe joints or couplings
End to side or plate
Saddle-type clamp
285156, 285351, 285379, F16L 1112
Patent
active
053740874
ABSTRACT:
A tapping sleeve for attaching a branch line to a main fluid conduit. The tapping sleeve has upper and lower sleeve members, bolted together around the main fluid conduit. Shell gaskets seal between the sleeve members and the main fluid conduit and a branch gasket seals around a side opening in the upper sleeve member. Metal shell gasket retaining rings secure the shell gaskets in place and a metal branch gasket retaining ring secures the branch gasket. In the preferred embodiment, the retaining ring has a circular cross section.
REFERENCES:
patent: 771306 (1904-10-01), Gregg
patent: 873689 (1907-12-01), Van Winkle
patent: 3204665 (1965-09-01), Faint
patent: 3471176 (1969-10-01), Gilchrist
patent: 3840255 (1974-10-01), Daghe
patent: 3909011 (1975-09-01), Sheesley
patent: 4708373 (1987-11-01), Morriss, Jr.
patent: 4895397 (1990-01-01), Miller
patent: 5040828 (1991-08-01), Kane
Drawing No. D0703 of Robar Industries Ltd., Showing the Robar 6606 Tapping Sleeve dated Jul. 31, 1981 and published in 1981 (Exhibit A).
Drawing No. A0706 of Robar Industries, Ltd., Showing Saddle Gasket and Retainer Ring of Robar 6606 Tapping Sleeve dated Sep. 15, 1982, published on or about 1982.
Arola Dave W.
Pipeline Accessory Marketing, Ltd.
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