Manhold

Details Manhold Manhold

1978-11-03

1981-03-17

Faw, Jr., Price C.

Static structures (e.g., buildings)

With entrance for persons or objects in horizontal or...

With additional enclosure structure; e.g., manhole

404 26, E02D 2914

Patent

active

042559090

ABSTRACT:
An adjustable manhole is disclosed having telescoping tubular members which can be fixed in a number of relative axial positions. One member carries a series of transversely oriented ribs and grooves in the interface between the members, and the other member carries a smooth wall in the interface. Locking means are engageable in selected grooves to fix the relative positions of the members.

REFERENCES:
patent: 80776 (1868-08-01), Smith
patent: 193686 (1877-07-01), Bowers
patent: 358696 (1887-03-01), Reichert
patent: 1131687 (1915-03-01), Eiber
patent: 1409905 (1922-03-01), Bayles
patent: 2049645 (1936-08-01), Fleckles
patent: 2877505 (1959-03-01), Stephens
patent: 3346230 (1967-10-01), Tolf
patent: 3629981 (1971-12-01), McCaffery

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