Seal for a joint or juncture – Seal between relatively movable parts – Relatively rotatable radially extending sealing face member
Patent
1986-03-03
1986-12-02
Ward, Robert S.
Seal for a joint or juncture
Seal between relatively movable parts
Relatively rotatable radially extending sealing face member
277207A, 52 20, F16J 1506
Patent
active
046259767
ABSTRACT:
A shaping element designed to form a sewer pipe receiving opening during pouring of concrete to mould a manhole. The shaping element also holds a gasket seal in position until the concrete is set. The shaping element is made of two axially separable parts each having a flange to form part of the sewer pipe receiving opening. The inner end of one flange has an L-shaped extension defining a radially inwardly extending step and an axially extending end portion, the inner end of the other part extends short of the step and overlaps the axial extension whereby there is formed a gasket seal receiving peripheral channel of L-shaped cross-section. The two parts are completely closed at their outer ends and are assembled by means of non-circular telescopic tubes at their center to maintain the same in a predetermined relative orientation.
REFERENCES:
patent: 3493236 (1970-02-01), Kleindienst
patent: 3787061 (1974-01-01), Yoakum
patent: 4128107 (1978-12-01), Blumhardt
patent: 4159829 (1979-07-01), Ditcher
patent: 4200299 (1980-04-01), Carlesimo
patent: 4387900 (1983-06-01), Ditcher et al.
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