Metal working – Method of mechanical manufacture – Assembling or joining
Patent
1995-09-26
1998-04-14
Bryant, David P.
Metal working
Method of mechanical manufacture
Assembling or joining
29512, 29523, 285222, B21D 3900
Patent
active
057378223
ABSTRACT:
A corporation stop for use with standard tapping equipment includes a threaded stem with an enlarged, conical head for forming a blind side seal. A resilient sleeve member coaxially surrounds a narrow portion of the stem, and a flat compression ring rests coaxially above the sleeve member and has a notch formed radially in its outer edge. A standard saddle having a radially-inward tab is placed on the external sidewall of the conduit about the opening and receives the compression ring, the tab engaging the notch in the compression ring. A clamp nut is engaged with the threaded stem, forcing the compression ring against the resilient sleeve member to forcibly move the upper end of the sleeve member towards the compression ring to form an external seal between the compression ring and the external sidewall of the conduit and force the sleeve member over the enlarged, conical head of the threaded stem to form an internal seal within the lined conduit. The stem, saddle member and compression ring engage each other to prevent relative rotation.
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Mueller Co. brochure: Drilling and Tapping Machines, 1991.
Carroll Joseph D.
Driver Franklin T.
Bryant David P.
Insituform (Netherlands) B.V.
Wolfson Michael I.
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