Vertical engine for walk behind lawn mower
OwnerKiyohiko Oguri, Yoshiharu Isakainventors
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Abstract
An improved lubricating system for an internal combustion engine having a horizontally disposed cylinder. The engine is provided with overhead valves that are disposed vertically above each other and which reciprocate about horizontally extending axes. The exhaust valve lies above the intake valve and the lubricating system delivers lubricant first to the exhaust valve and then by gravity to the intake valve. In addition, an arrangement is provided for submerging the valve operating tappets in lubricant to effect lubrication and silencing.
Claims19
In an engine having a poppet type exhaust valve and a poppet type intake valve each adapted to reciprocate about horizontally disposed axes and having the tips of their stem portions operating in a common valve operating chamber, the improvement comprising said exhaust valve lying vertically above said intake valve, means for delivering lubricant to a point above said exhaust valve for flow of lubricant first across the stem of said exhaust valve for cooling said exhaust valve and then by gravity to the stem of said intake valve.
In a valve operating mechanism for a reciprocating machine having a camshaft, a tappet slidably supported by said machine for reciprocation about a horizontally disposed axis and engaged with said camshaft, a push rod supported for reciprocation about a generally horizontally disposed axis and engaged at one end with said tappet and at its other end with a valve actuator, said push rod being reciprocal in an enlarged, horizontally disposed chamber formed by said engine, means for delivering lubricant to said chamber, and means extending across at least the lower portion of said chamber between the ends of said push rod for forming a dam to effect accumulation of lubricant in said chamber and around said tappet.
Dependencies are inferred from the claim text.