Static structures (e.g. – buildings) – With entrance for persons or objects in horizontal or... – With additional enclosure structure; e.g. – manhole
Patent
1986-03-17
1987-03-17
Friedman, Carl D.
Static structures (e.g., buildings)
With entrance for persons or objects in horizontal or...
With additional enclosure structure; e.g., manhole
404 25, 210165, E02D 2914
Patent
active
046496742
ABSTRACT:
A device for a drain, such as a manhole 10 for access to a sewer, is protected by a seal structure 34 having a bottom bleeding feature such as a bottom thru-bore 42. The seal structure 34 may have a flange 38 for sealingly engaging between a cover 22 and a frame 18 around an accesshole 17 of the manhole 10. The structure 34 has a central portion downwardly depressed to avoid a path of spin of the cover 22. In a bottom portion 40 of structure 34, the thru-bore 42 bleeds (such as by thin trickling streams) into and off the sewer, sufficient fluids such as air to maintain a substantially atmospheric level of pressure in the sewer. Because of its size and shape, the thru-bore 42 advantageously bleeds into the sewer, from water introduced to manhole 10, only quantities of water known to be tolerated by the sewer system. To avoid unsanitary conditions, when water stops entering accesshole 17, the thru-bore 42 substantially completely drains away water remaining in the seal structure 34.
REFERENCES:
patent: 3712009 (1973-01-01), Campagna
patent: 4030851 (1977-06-01), Graybeal
patent: 4067659 (1978-01-01), Campagna, Jr. et al.
patent: 4305679 (1981-12-01), Modi
patent: 4486122 (1984-12-01), Arntyr et al.
patent: 4512492 (1985-04-01), Graybeal
Gaul Craig S.
Knutson Oliver M.
Watson Donald C.
Friedman Carl D.
Gaul Craig S.
Knutson Oliver M.
Watson D. C.
LandOfFree
Drain hole seal with bottom bleeder does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Drain hole seal with bottom bleeder, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Drain hole seal with bottom bleeder will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-1779873