Metal working – Method of mechanical manufacture – Assembling or joining
Patent
1979-12-17
1981-11-03
Moon, Charlie T.
Metal working
Method of mechanical manufacture
Assembling or joining
29235, 285230, B23P 1102
Patent
active
042977800
ABSTRACT:
A method for connecting a sewer pipe to a larger pipe or manhole wherein the connection between the pipe and manhole opening is sealed by means of an elastomeric gasket or boot. A rigid ring is inserted within one end of an elastomeric boot, which has an outer diameter slightly larger than the inner diameter of the opening in the manhole. The boot is inserted into the opening up to the enlarged end, a jacking device is inserted through the gasket, and a circular, stepped plate is connected to the end of the jacking device which has been inserted through the gasket so that it is positioned to engage the end of the gasket assembly having the ring inserted therein. The jacking device includes a spider element which is braced against the outer wall of the manhole, and the device is operated such that the plate is drawn toward the spider thereby pulling the gasket and ring into the opening wherein the gasket is compressed between the opening and the rigid ring so that a compressive water-tight seal is achieved. In the disclosed embodiment of the invention, the jacking device comprises a threaded rod secured to the plate at one end and threadedly connected to a nut at the other end, which is turned by means of a ratchet device so as to draw the rod, stepped plate and gasket assembly into the opening.
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Jeffers Albert L.
Moon Charlie T.
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