Manhole opening structure

Details Manhole opening structure Manhole opening structure

1996-05-30

1998-03-31

Friedman, Carl D.

Static structures (e.g., buildings)

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

52 20, 405 25, 405 26, E02D 2914

Patent

active

057325120

ABSTRACT:
A manhole opening structure having a cover traveling rail on which at least one manhole cover can travel between a manhole opening and the ground and rail lifter serving to upwardly and downwardly move the cover traveling rail between a lower position where the manhole cover closes the manhole opening and an upper position where the manhole cover can move between the cover traveling rail and the ground.

REFERENCES:
patent: 1076386 (1913-10-01), O'Day
patent: 2930295 (1960-03-01), Hale
patent: 3858998 (1975-01-01), Larsson et al.
patent: 4412404 (1983-11-01), Manning
patent: 5375940 (1994-12-01), Kobayashi
patent: 5511898 (1996-04-01), Pettesch et al.

Affiliated with

Also associated with

Rating

Manhole opening structure does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Manhole opening structure, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Manhole opening structure will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-42907