The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Apr. 11, 1995
Filed:
Apr. 19, 1993
Mike Devlin, Anaheim, CA (US);
Dabico, Inc., Costa Mesa, CA (US);
Abstract
A subsurface chamber formed by a pit and buried beneath a surface across which aircraft travel is provided with an effective sealing system at its opening. The opening to the chamber is formed by a mounting frame adapted to receive and seat a lid therewithin. The mounting frame is formed with a frustoconical wall tapering downwardly and inwardly toward the opening into the chamber. The lid is provided with a peripheral rim having a plurality of flexible, resilient, annular, water impervious sealing flaps that extend outwardly from the lid an which are vertically spaced from each other. As the lid is lowered into position, the sealing flaps do not scrape or slide against the frustoconical wall of the mounting frame. Rather, they establish contact with the frame only as the lid approaches to within one quarter inch of its fully seated position. With this contact the sealing flaps are deflected upwardly to form a liquid tight seal against the mounting frame without frictional abrasion against the wall of the frame.