Internal-combustion engines – Lubricators – Crankcase – pressure control
Patent
1995-12-21
1996-12-31
Solis, Erick R.
Internal-combustion engines
Lubricators
Crankcase, pressure control
184 618, 184 111, F01M 906
Patent
active
055884083
ABSTRACT:
An engine unit in which a crank shaft is arranged perpendicularly in its housing in the state of use thereof comprises a housing defining a crank chamber therein, a crank shaft disposed in the crank chamber to be rotatable, a piston-cylinder assembly disposed in the housing, a valve mechanism operatively connected to the piston-cylinder assembly for sucking and discharging air in the cylinder, and a valve moving mechanism for driving the valve mechanism so as to open or close the same. The valve moving mechanism includes a push-rod members, a push-rod cover member covering the push-rod members with a space therebetween. A rocker chamber is disposed in the housing and communicated with the space, and a drain pipe is disposed between a lower portion of the rocker chamber and a lower portion of the crank chamber so as to establish communication therebetween with an inclination in the state of use. An agitation ring is mounted to the crank shaft so as to agitate and splash a lubrication oil in the crank chamber, and the housing is provided with a guide wall structure for guiding the splashed lubrication oil to the valve moving mechanism.
REFERENCES:
patent: 5090375 (1992-02-01), Hudson
patent: 5213074 (1993-05-01), Imagawa et al.
patent: 5447127 (1995-09-01), Luck et al.
Ryobi Limited
Solis Erick R.
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