Harvesters – Motorized harvester – With randomly-operative control of motor
Patent
1978-08-21
1980-05-27
Eskovitz, Jay N.
Harvesters
Motorized harvester
With randomly-operative control of motor
123182, 123198DC, A01D 7520
Patent
active
042043840
ABSTRACT:
Disclosed herein is a lawn mower comprising a rotatable cutter blade supported on a frame, an internal combustion engine supported on the frame and including an engine block, a cylinder, and a reciprocative piston which is drivingly connected to the cutter blade, a valving arrangement for stopping the engine including an outlet port opening into the cylinder combustion chamber, a discharge port, a valve which is interposed the outlet and discharge ports and is movable between open and closed positions to respectively permit and block communication between the outlet and discharge ports, and a valve member which, in response to the combustion chamber pressure, opens to vent gases from the combustion chamber during the compression stroke of the piston and closes to prevent entry of gases through the discharge port into the combustion chamber during the expansion stroke of the piston, and a spring for biasing the valve toward the open position. Operation of the valve is controlled by a control mechanism which is movable between an operating position and a non-operating position corresponding to the open position of the valve and is biased to the non-operating position by the spring.
REFERENCES:
patent: 2440483 (1948-04-01), Mennesson
patent: 2742380 (1956-04-01), Peters
patent: 2778349 (1957-01-01), Thommen
patent: 3893440 (1975-07-01), Dooley
patent: 3955653 (1976-05-01), Comer
Eskovitz Jay N.
Outboard Marine Corporation
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