Instrument for testing lubricating oil

Details Instrument for testing lubricating oil Instrument for testing lubricating oil

1989-05-30

1990-10-30

Williams, Hezron E.

Measuring and testing

Liquid analysis or analysis of the suspension of solids in a...

Vapor pressure

73 10, G01N 3328

Patent

active

049660322

ABSTRACT:
An instrument for testing the lubricating ability of a lubricating oil has a base member having a contact surface to be submerged in the oil, a vibration member having a friction portion pressed against the contact surface, a driving device having a driving element such as a driving piezoelectric element for vibrating the vibration member, a vibration pickup such as a sensing piezoelectric element for sensing a vibration produced by the friction between the friction portion and the contact surface with the interposition of the lubricating oil, an amplifier for amplifying the output of the pickup, a high-pass filter for filtering the output of the amplifier, and a voltmeter for receiving the output of the filter.

REFERENCES:
patent: 3739265 (1973-06-01), Skildum
patent: 3913377 (1975-10-01), Lindeman
patent: 4311036 (1982-01-01), Kajdas et al.
patent: 4602505 (1986-07-01), Kanda et al.

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