Internal-combustion engines – Lubricators – Crankcase – pressure control
Reexamination Certificate
2007-05-22
2007-05-22
Cronin, Stephen K. (Department: 3747)
Internal-combustion engines
Lubricators
Crankcase, pressure control
C440S084000
Reexamination Certificate
active
11234745
ABSTRACT:
The use of an oil cooler in an internal combustion engine for a personal watercraft is controlled, whereby excessive cooling of the engine during warmup with cold water operation is avoided, and dilution of oil is substantially prevented. The internal combustion engine includes a bypass oil path connecting respective oil paths upstream and downstream of the oil cooler. The bypass oil path permits oil to be selectively detoured around the oil cooler. An oil thermostat is provided in the upstream oil path for selectively opening either a path to the oil cooler or the bypass oil path, and the oil thermostat is operable to switch the flow of oil therebetween. The oil thermostat opens the bypass oil path when the temperature of the oil is below a predetermined temperature, and directs oil to the oil cooler when the temperature of the oil is equal to or exceeds a predetermined temperature.
REFERENCES:
patent: 4000666 (1977-01-01), Ito et al.
patent: 4508069 (1985-04-01), Dobler et al.
patent: 4690111 (1987-09-01), Kohno et al.
patent: 5483928 (1996-01-01), Mahlberg et al.
patent: 5887564 (1999-03-01), Kawamoto
patent: 6371071 (2002-04-01), Iwata
patent: 6508211 (2003-01-01), Asano
patent: 6681708 (2004-01-01), Gokan
patent: 6719598 (2004-04-01), Gokan et al.
patent: 6743063 (2004-06-01), Gokan
patent: 6772725 (2004-08-01), Inaba et al.
patent: 6868816 (2005-03-01), Hiraki et al.
patent: 2003-035201 (2003-02-01), None
Hoi Yosuke
Izumi Michio
Matsuo Hisashi
Okada Kazunori
Ali Hyder
Blackman William D.
Carrier Joseph P.
Carrier Blackman & Associates P.C.
Cronin Stephen K.
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