F - Mech Eng,Light,Heat,Weapons – 16 – L
Patent
F - Mech Eng,Light,Heat,Weapons
16
L
285/23
F16L 19/00 (2006.01) F16L 41/14 (2006.01)
Patent
CA 1132626
ABSTRACT OF THE DISCLOSURE A conduit is apertured through the wall thereof and 3 hollow stem, e.g., for sprinkler heads and the like, is provided with a bulbous base, and a double sloping shouldered base with the diameter of the bulbous base being slightly less than the diameter of the conduit aperture so that the lower end of the hollow stem is insertable through the aperture. A malleably deformable, e.g., resilient, has an outside diameter just slightly smaller than the diameter of the aperture in the conduit enabling snug insertion of the sleeve through the aperture, and an internal diameter enabling snug passage of a hollow stem therethrough, the sleeve including an internal chamfered upper end and an external chamfered lower end, the length of the sleeve being greater than the thickness of the conduit. A hollow stem includes a bulbous base, the bulbous base being of a larger diameter than the external diameter of the hollow stem but being of a slightly less diameter than the diameter of the aperture, the base including a first shoulder at the lower end thereof, the first shoulder sloping upwardly and inwardly towards the portion of the stem which is disposed thereabove, and a second frusto-conical shoulder formed thereon spaced above the first frusto-conical shoulder, the second frusto-conical shoulder sloping inwardly and upwardly toward an upper cylindrical stem portion, the diameter of the upper stem portion being less than the diameter of the stem between the second frusto-conical shoulder and the first frusto-conical shoulder, a portion of the stem immediately above the second shoulder being screw threaded. Clamping means are associated with the hollow stem, the clamping means comprising a screw-threaded cylindrical coupling engageable with the portion of the stem above the frusto-conical base which is screw-threaded, the external diameter of the lower end of the cylindrical coupling being greater than the diameter of the aperture, wherein, when the hollow stem and the sleeve are inserted into the aperture, and when the clamping means are actuated to apply a longitudinal upward force against the base of the sleeve, initial actuation of the clamping means forces the lower end of the sleeve over the second frusto-conical shoulder and down to the frusto-conical base, and the sleeve is expanded radially outwardly into sealing engagement with the wall of the aperture. Further tightening expands the sleeve by the frusto-conical base which cannot pass through the aperture because of the thickness of the resilient sleeve. When tightened fully, the hollow stem is held in firm sealing relationship with the aperture through the wall of the conduit.
346731
Pohoreski Anton P.
Strunk Norman E.
Marcus & Associates
Pohoreski Anton P.
Strunk Norman E.
LandOfFree
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