Internal-combustion engines – Lubricators – Crankcase – pressure control
Patent
1986-05-06
1988-05-31
Cross, E. Rollins
Internal-combustion engines
Lubricators
Crankcase, pressure control
123196S, 210168, F01M 100
Patent
active
047473789
ABSTRACT:
The lubricating oil filter of the invention comprises an outer casing which houses a filter element through which the oil passes, a pressure relief valve which prevents the oil passing through said filter element in the case of excessive pressure drop, and mutually facing metal plates separated by the filter element and arranged to form a capacitor, of which the filter element forms the dielectric, one of the plates being connected to the vehicle earth and the other being connected to an electrical conductor leading to the outside of the filter, the pressure relief valve being provided with means for connecting the electrical conductor to earth in the case of high pressure drop in the oil flow through the filter element, and with further means for connecting the electrical conductor to earth following repeated opening movements of the pressure relief valve, there being provided an instrument for measuring the capacitance of said capacitor and for indicating when the electrical conductor has been connected to earth.
REFERENCES:
patent: 2729339 (1956-01-01), McCoy
patent: 4142973 (1979-03-01), Kachman
Cross E. Rollins
Ital Idee s.r.l. an Italian Limited Liability Company
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