Vertical engine for walk-behind lawn mower

Details Vertical engine for walk-behind lawn mower Vertical engine for walk-behind lawn mower

1987-09-08

1991-03-19

Okonsky, David A.

Internal-combustion engines

Cooling

Air-cooled

123 65VD, 123195HC, 56 101, F01P 704

Patent

active

050001264

ABSTRACT:
A rotary lawn mower having an air-cooled single cylinder four-cycle internal combustion engine for powering its cutting blade. The engine is air cooled and is disposed so that its exhaust port lies above the intake port and the carburetor is positioned above a raised portion of the scroll part of the lawn mower housing for good cooling of the exhaust port without heating of the carburetor. A valve operating mechanism is disclosed including a pair of push rods that are supported on the exhaust port side of the engine and which are surrounded by a mass of cylinder head and cylinder for assisting in heat dissipation.

REFERENCES:
patent: 3091226 (1963-05-01), Jepson
patent: 3183899 (1965-05-01), Tuggle
patent: 3581717 (1971-06-01), Fullerton
patent: 3841278 (1974-10-01), Frehe
patent: 4149362 (1979-04-01), Haffner et al.
patent: 4261302 (1981-04-01), Sheldon
patent: 4326370 (1982-04-01), Thorud
patent: 4433651 (1984-02-01), Nakakita et al.
patent: 4570584 (1986-02-01), Uetsuji et al.
patent: 4570587 (1986-02-01), Watanabe et al.
patent: 4573436 (1986-03-01), Owens
patent: 4688529 (1987-08-01), Mitadera et al.
patent: 4711077 (1987-12-01), Kutsukake et al.

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