Trowel for smoothing mortar on the interior of a pipe

Details Trowel for smoothing mortar on the interior of a pipe Trowel for smoothing mortar on the interior of a pipe

1981-09-11

1985-03-26

McIntosh, John P.

Coating apparatus

Solid member or material acting on coating after application

Inside of hollow work

425460, B05C 706, B05C 1104

Patent

active

045066248

ABSTRACT:
A trowel for smoothing mortar coated on the interior wall of a pipe, including an elastic member for receiving pressurized air and inflating to a diameter less than the interior of the pipe. A blade assembly is connected to and extends from the elastic member, and defines an outer circular surface substantially corresponding to the coated interior diameter of the pipe for engaging and smoothing said mortar. The blade assembly is constructed and arranged to accommodate variances in the inner diameter of the pipeline.

REFERENCES:
patent: 3188710 (1965-06-01), Perkins
patent: 3263296 (1966-08-01), Barton
patent: 3966389 (1976-06-01), Shubert
patent: 4067680 (1978-01-01), Perkins

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