초록 ▼

A manhole or catch basin assembly comprises separable component parts which assemble to a unitary structure, the component parts being readily replaced or interchanged to increase the vertical height of the assembly such as when a road surface is repaved to an elevated height; the component parts ar

A manhole or catch basin assembly comprises separable component parts which assemble to a unitary structure, the component parts being readily replaced or interchanged to increase the vertical height of the assembly such as when a road surface is repaved to an elevated height; the component parts are molded parts which fit snugly together in sealing engagement.

대표청구항 ▼

[ I claim:] [1.] A manhole or catch basin assembly frame comprising:i) a molded frame member having a peripheral frame wall defining an access opening, said frame wall having an upper end and a lower face extending outwardly of said access opening, said molded frame member being compression molded o

[ I claim:] [1.] A manhole or catch basin assembly frame comprising:i) a molded frame member having a peripheral frame wall defining an access opening, said frame wall having an upper end and a lower face extending outwardly of said access opening, said molded frame member being compression molded of resilient material,ii) seat means defined in said upper end, said seat means comprising an upper outer seat and a lower inner seat, said upper seat circumscribing and being spaced above said lower seat,iii) said upper outer seat comprising a seat floor and an inwardly facing seat wall extending upwardly of an outer edge of said seat floor,iv) said lower inner seat being able to matingly support an outer peripheral edge of an upper assembly member disposed above said frame, and said upper outer seat being able to matingly support said upper assembly member or a further assembly member disposed above said frame, with an outer zone of a lower face of said upper assembly member or said further assembly member engaging said seat floor and said inwardly facing seat wall of said upper outer seat,v) said lower face of said frame wall having means to matingly engage an adjustment riser such that lateral movement of the adjustment riser relative to the frame member is inhibited.