Superimposed drain cover

Details Superimposed drain cover Superimposed drain cover

2000-10-05

2002-02-05

Upton, Christopher (Department: 1724)

Liquid purification or separation

Structural installation

Grated inlet surface drain

C210S166000, C404S026000, C052S020000

Reexamination Certificate

active

06344137

ABSTRACT:

BACKGROUND OF THE INVENTION
The present invention relates to drainage of road and more particularly to a superimposed drain cover which has cushions and supporting elements so that the drain cover can be higher or lower to cope with the height of the surface course of the road.
Typical drain covers (as shown in
FIGS. 1 and 2
) include only a tubular seat
1
embedded into the pavement and a cover
2
covered on the seat
1
. This type of drain cover is difficult to adjust in height in cooperation with the road surface
4
. So it may be higher or lower than the road surface which may cause a traffic accident.
FIG. 3
shows another drain cover which is a previous disclosure of mine and which includes a tubular seat
10
, several layers of superimposed rings
11
under the tubular cover
12
in order to make the top of the cover
12
to be even with the road surface
13
. However, once open the cover
12
, especially a large one, is too heavy to be lifted by manpower. Besides, the road surface around the cover
12
has to be partially damaged and then repaired. This is a troublesome job for a worker.
SUMMARY OF THE PRESENT INVENTION
The present invention has a main object to provide a superimposed drain cover in which the relative elements have suspending facilities so that these element can be lifted by mechanical means.
Another object of the present invention is to provide a superimposed drain cover which can be opened without damaging the road surface so as to save the time and material to repair.
Accordingly, the superimposed drain cover secures to the top of a drain and has a stepped inner shoulder for superimposing a plurality of cushion pieces and layers of superimposed rings and a cobweb surfaced cover. All the heavy elements have suspending facilities so as to be lifted by mechanical means.
The present invention will become more fully understood by reference to the following detailed description thereof when read in conjunction with the attached drawings.


REFERENCES:
patent: 3215052 (1965-11-01), Lindstad et al.
patent: 3218943 (1965-11-01), Bowman
patent: 3237538 (1966-03-01), McPheeters et al.
patent: 3331295 (1967-07-01), Sorrell
patent: 3611889 (1971-10-01), Levinson
patent: 3893919 (1975-07-01), Flegel et al.
patent: 4188151 (1980-02-01), Hall
patent: 4273467 (1981-06-01), Cronk
patent: 4925337 (1990-05-01), Spiess et al.
patent: 5044878 (1991-09-01), Pritchard
patent: 5211504 (1993-05-01), Trudel
patent: 6196760 (2001-03-01), Sinclair

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