Static structures (e.g. – buildings) – With entrance for persons or objects in horizontal or... – With additional enclosure structure; e.g. – manhole
Patent
1997-03-17
1999-09-14
Aubrey, Beth
Static structures (e.g., buildings)
With entrance for persons or objects in horizontal or...
With additional enclosure structure; e.g., manhole
49379, 49463, 220335, 277642, 277630, E02D 2914
Patent
active
059503688
ABSTRACT:
An improved access lid assembly is provided for a subsurface chamber used to service aircraft. A lift assembly is provided for elevating the lid upwardly from an opening in a surrounding mounting frame disposed atop the subsurface chamber while maintaining the lid in a horizontal disposition. A hinge assembly connects the lift assembly to the lid at a peripheral location thereon on the underside of the lid, without any connection to the peripheral edge of the lid. The hinge assembly allows the lid to rotate about a horizontal axis to an open position through an arc of at least ninety degrees. By avoiding any connection to the peripheral edges of the lid, an elastomeric, annular seal can be mounted to completely encircle the lid and provide a water-tight barrier about the access opening. The seal is mounted between the upper and lower surfaces of the lid within a groove, preferably with a dovetail connection, to securely grip and hold the seal upon the edge of the lid. Nevertheless, the use of an adhesive is avoided so that the seal can be easily removed and replaced when necessary. Also, the lift assembly is provided with a damper mechanism so as to protect the lift assembly from impacts and shocks that would otherwise result when the lid falls under the weight of gravity from an opened position to a horizontal disposition atop the access opening.
REFERENCES:
patent: 3945329 (1976-03-01), Bywater
patent: 4467932 (1984-08-01), Dabich
patent: 4468042 (1984-08-01), Pippert et al.
patent: 4706718 (1987-11-01), Milo
patent: 5335451 (1994-08-01), Druzynski
patent: 5404676 (1995-04-01), Devlin
patent: 5465862 (1995-11-01), Devlin
patent: 5600921 (1997-02-01), Vardaro
patent: 5664793 (1997-09-01), Engibarov
Aubrey Beth
Dabico Inc.
Thomas Charles H.
LandOfFree
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