Patent ID: 8215090

Claim:
A walk-behind work machine; comprising: an engine; a work-machine body having a plurality of mounting parts to which the engine is joined; and an operating handle extending rearwardly from the work-machine body, wherein the plurality of mounting parts includes a high-rigidity mounting part, having a hole therein, positioned at a maximally rigid part on the work-machine body, and other mounting parts exclusive of the high-rigidity mounting part, and further wherein the high-rigidity mounting part includes, a cylindrical heat insulator, disposed inside of said hole, and having a flange on an upper portion thereof, and a collar having a flange on an upper portion thereof, and being disposed inside of said heat insulator, such that the flange of said collar is positioned above the flange of said heat insulator, and further such that a first length, between a bottom of the flange of the collar and a lower end of the collar, is larger than a second length, from a top of the flange of the heat insulator to a lower end, opposite the flange, of the heat insulator, in order to form a gap which is a difference between the first and second lengths, and wherein the engine is joined securely to the other mounting parts and is joined more loosely to the high-rigidity mounting part than to the other mounting parts.