Determining the level of contaminants in a hydraulic system

Details Determining the level of contaminants in a hydraulic system Determining the level of contaminants in a hydraulic system

1982-12-03

1985-01-29

Goldberg, Gerald

Measuring and testing

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

Content or effect of a constituent of a liquid mixture

G01N 1506

Patent

active

044957998

ABSTRACT:
A device for determining the level of particulate contamination in a hydraulic system. Between the inlet and outlet of the device the fluid passes through the narrow clearance between a piston and a surrounding bore. As the clearance becomes obstructed by contaminant, pressure rises in a chamber upstream of the piston. Rise of this pressure above a certain level is detected by a detector which both triggers a counter and operates a solenoid to withdraw the piston and release trapped contaminant, after which the piston returns and another cycle of contaminant build-up begins. The frequency of the release of the piston indicates the degree of contamination of the fluid. Instead of pressure build-up, parameters related to fluid flow may be used to trigger the counter and the release of contaminants from clearance, and means may be provided to meter individual, fixed-volume charges from the general body of fluid and discharge them through a clearance. The clearance may as an alternative be arranged to be cleared by back flushing.

REFERENCES:
patent: 3050987 (1962-08-01), Osgood
patent: 3182670 (1965-05-01), Howell
patent: 3359786 (1967-12-01), Von Alfthan
patent: 3832094 (1974-08-01), Raymond
patent: 3941958 (1976-03-01), Flesburg
patent: 3952580 (1976-04-01), Bennett

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