Class 404/26 - Elevation or level adjustment

Subclass of Class 404 - Road structure, process, or apparatus
Definition: Vault cover-closure structure including means to vary the
No. of patents: 204
Last issue date: 05/22/2012

Number	Title	Issue Date
4050839	Process for raising manholes A process for raising manholes and manhole covers to a new grade level of a street when constructing new streets or when paving old streets, comprising the steps of placing a sealing means around the interior of the cast manhole between the lower edge the...	09/27/1977
4010051	Bedding of load-carrying members on load-supporting foundations A method of bedding a load-carrying member on a supporting foundation in which one or more open-ended axially compressible moulds are placed on the foundation and a bonding agent which includes a thermosetting resin capable of bonding to both the undersid...	03/01/1977
3968600	Adjustable manhole cover support structure An adjustable manhole cover support structure including a peripheral frame adapted for placement in the opening of a manhole housing, a peripheral manhole adjusting ring disposed on the frame, and a lateral support ring disposed on the adjusting ring. The...	07/13/1976
3930739	Manhole frame with adjustment screws A manhole frame with adjustment screws for raising and lowering said frame has in its inner surface pockets or recesses each communicating with a hole for guiding of the adjustment screws. The recesses serve to receive nuts for the screws and the recesses...	01/06/1976

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