Pipe joints or couplings – Connector for conduit housing electromagnetic line: – Having box and connector
Patent
1990-04-23
1991-07-09
Arola, Dave W.
Pipe joints or couplings
Connector for conduit housing electromagnetic line:
Having box and connector
24270, 24494, 29237, 16225, 16DIG13, 16226, 285162, 285194, 285237, 285236, 285230, F16L 304, F16L 502, F16L 2108
Patent
active
050299077
ABSTRACT:
A band assembly for effecting a seal particularly adapted for use in establishing a joint between a sewer pipe and a reinforced concrete manhole riser. The seal is affected by a tapered elastomeric tubular connector boot and a clamping band member that expands one end of the boot into the surface of the riser wall. The band assembly comprises a clamping band and a separate toggle expander. The clamping band includes separated end sections that capture the ends of the toggle expander. When the toggle expander is forced into an expanded position, the clamping band forces the connector boot into contact with the manhole riser. The clamping band includes stiffening lips and the toggle expander also incudes stiffening lips to provide a rigid structure. In one embodiment a tab overlies the end sections in the space of the clamping band and the space therebetween to further improve the evenness of the sealing force applied to the connector boot.
REFERENCES:
patent: 285240 (1883-09-01), Doyle
patent: 2483304 (1949-09-01), Vogel
patent: 2535789 (1950-12-01), Debell
patent: 2880017 (1959-03-01), Anderson
patent: 3958313 (1976-05-01), Rossborough
patent: 4369715 (1983-01-01), Ingersoll
patent: 4387900 (1983-06-01), Ditcher
patent: 4532675 (1985-08-01), Salazar
patent: 4702645 (1987-10-01), Skinner
patent: 4746127 (1988-05-01), Westhoff
patent: 4793163 (1988-12-01), MacFarlane
Burns, Edgar, "How to Design an Integral Hinge", Modern Plastics, Oct. 1963, pp. 166-168.
Arola Dave W.
Bordas Carol I.
NPC, Inc.
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