Cover arrangement for a servicing hole

Details Cover arrangement for a servicing hole Cover arrangement for a servicing hole

1985-02-26

1986-12-16

Friedman, Carl D.

Static structures (e.g., buildings)

Specified terranean relationship

Open top, embedded container, tank, or reservoir

160133, E06B 908

Patent

active

046286462

ABSTRACT:
A cover arrangement for a servicing hole comprises a band of a plurality of supporting bars pivotably connected with one another by chains. The band can be drawn into an open position and pushed into a closed position by a reversing motor driving chain wheels which engage with the chains at the band. Guide means at both ends of each supporting bar move along a horizontal U-shaped path which is continuously surrounded by a guiding web structure ensuring that the band is positively guided and cannot buckle even during its pushing motion.

REFERENCES:
patent: 2850088 (1958-09-01), Purdy
patent: 3341180 (1967-09-01), Dashio
patent: 3532153 (1970-10-01), D'Anka
patent: 3698346 (1972-10-01), Baur
patent: 3894571 (1975-07-01), Hinchliff
patent: 4156953 (1979-06-01), Alten
patent: 4341253 (1982-07-01), Eyerle

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