System for installing underground pipe

Details System for installing underground pipe System for installing underground pipe

2005-01-04

2005-01-04

Stodola, Daniel P. (Department: 3679)

Joints and connections

Interfitted members

Clamped members

C403S022000, C403S048000, C403S297000, C403S214000, C403S374100, C403S374200, C403S374300

Reexamination Certificate

active

06837646

ABSTRACT:
A tensioning apparatus for operably applying forces to inner surfaces of a hollow body includes a bracing nut having a first receptacle portion and a bracing portion, an axially movable rod that is operably coupled to the bracing nut such that a first portion of the rod is selectively axially movable within the bracing nut, a wedge structure that is operably engaged with the rod for coaxial movement therewith, and a tensioning body that is operably and slidably engaged with the wedge structure. The tension body and the wedge structure have corresponding and facing sloped surfaces such that selectively axial motion of the rod correspondingly and coaxially moves the wedge structure, which coaxial movement of the wedge structure therefore progressively radially displaces the tensioning body to provide tensioning forces against respective inner surfaces of the hollow body.

REFERENCES:
patent: 3031995 (1962-05-01), Taylor, Jr.
patent: 3674055 (1972-07-01), Ray
patent: 3742186 (1973-06-01), Finkel et al.
patent: 3986383 (1976-10-01), Petteys

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