E - Fixed Constructions – 02 – D
Patent
E - Fixed Constructions
02
D
E02D 29/14 (2006.01)
Patent
CA 2270314
A manhole frame and cap assembly which includes a male and female version of the invention. For use in new road construction or road resurfacing, where the assembly sits on a manhole shaft, adjustment rings, stones mortar, bricks or any other suitable material. In one form of the invention, the manhole frame assembly includes two parts, an externally threaded insert and manhole frame with a complimentary internal groove in which the threaded insert is rotatably received whereby providing adjustment for height. The threaded insert may have an internal flange to provide a hard bearing surface in which the manhole cap will sit. In another form of the invention, the manhole frame assembly includes two parts, a sleeve with an internal groove and a manhole frame with a complimentary external thread on which the grooved sleeve is rotatably received whereby providing adjustment for height. The grooved skirt may have an internal flange to provide a hard bearing surface in which the manhole cap will sit.
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