초록 ▼

A frame and cover for road surface installations has a one-piece cast metal frame member with an aperture therein to receive a cover member which can be used for catch basins, maintenance holes, valve chamber covers and underground vaults. The frame member has a side wall which extends smoothly down

A frame and cover for road surface installations has a one-piece cast metal frame member with an aperture therein to receive a cover member which can be used for catch basins, maintenance holes, valve chamber covers and underground vaults. The frame member has a side wall which extends smoothly downwardly between the upper and lower faces of the frame member and is free from laterally outer projections. Vibrations from vehicles moving over the frame and cover are transferred downwardly to the structure on which the frame is supported rather than to the adjacent asphalt, thereby extending the service life of the asphalt surrounding the frame. The cover member preferably has at least one lug extending laterally outwardly from its outer wall, the lugs adapted to be received in corresponding recesses formed about the aperture of the frame member. The lugs and the recesses in the frame members are provided with holes to permit the frame member and cover member to be secured to one another by a mechanical fastener. The outwardly directed lugs on the cover member do not interfere with movement of personnel and equipment through the open aperture.

대표청구항 ▼

[ What is claimed is:] [1.] A road surface installation frame and cover comprising:a one-piece cast metal frame member having a generally planar upper face having an aperture therein, and including an edge wall extending downwardly from said aperture and having an inwardly projecting lip adjacent a

[ What is claimed is:] [1.] A road surface installation frame and cover comprising:a one-piece cast metal frame member having a generally planar upper face having an aperture therein, and including an edge wall extending downwardly from said aperture and having an inwardly projecting lip adjacent a lower edge of said edge wall; anda cast metal cover member received in said aperture and having an outer wall nesting within said edge wall and a lower edge supported on said lip;said cover member having at least one lug extending laterally outwardly from said outer wall thereof and heaving a hole extending downwardly through said lug; andsaid frame member having at least one recess extending outwardly in said edge wall to receive and locate said lug, and said recess having a lower side having an opening therein to cooperate with a mechanical fastener passed through the hole in the lug to secure said cover to said frame.