Method, apparatus and product for improved pipe-to-manhole seali

Details Method, apparatus and product for improved pipe-to-manhole seali Method, apparatus and product for improved pipe-to-manhole seali

1974-06-05

1976-05-25

Lanham, C. W.

Metal working

Means to assemble or disassemble

Puller or pusher means, contained force multiplying operator

285230, 285237, 285162, 29237, 29455R, F16L 304, F16L 502, F16L 2108

Patent

active

039583139

ABSTRACT:
An underground joint between sewer pipe and reinforced concrete manhole riser is tightly sealed, and resistant to breakage caused by settling or frost heaving by a tapered, elastomeric, tubular connector boot, capable of flexing and yielding under lateral shift. A smooth faced hole is core drilled in the riser wall. The large end of the boot is expanded radially, by an expandable metal band, to a permanently enlarged diameter and internally clamped within the hole which compresses the material of the boot against the hole surface at 1000 psi, or more. The band is expanded and clamped in a direction normal to the central longitudinal axis of the sleeve by hydraulic jack means. The pipe end is inserted in the boot, up to the inside wall of the manhole, but is yieldable in any direction without leakage or breakage.

REFERENCES:
patent: 3406988 (1968-10-01), Jones
patent: 3585699 (1971-06-01), Shuttle
patent: 3700265 (1972-10-01), Dufour et al.

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