Proportional valve for hydraulic systems

Details Proportional valve for hydraulic systems Proportional valve for hydraulic systems

1980-04-16

1983-06-07

Rosenthal, Arnold

Fluid handling

Line condition change responsive valves

Direct response valves

137540, 251129, 361159, 318687, F16K 3104

Patent

active

043866263

ABSTRACT:
In order to correct non-linearities inherently existing in the relation between the value of a hydraulic fluid parameter controlled by a proportional valve and an operating signal controlling the valve, in an arrangement in which the setting of the valve is controlled by effecting a comparison between the operating signal and a feedback signal representing the valve movement, a memory is provided to modify one of those signals prior to comparison in a manner to compensate for such non-linearities.

REFERENCES:
patent: 3922587 (1975-11-01), Jones
patent: 3938778 (1976-02-01), Hansen et al.
patent: 3967648 (1976-07-01), Tirelli
patent: 4017056 (1977-04-01), Schwalenstocker et al.
patent: 4161962 (1979-07-01), Maringer et al.
"Olhydraulik und Pneumatik", [Oil Hydraulics and Pneumatics], vol. 21, (1977), No. 10, pp. 722-724, 727-729.
"Plasverarbeiter", [Plastic Worker], No. 9/78, pp. 475-479.

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