Hall effect valve spool position sensor

Details Hall effect valve spool position sensor Hall effect valve spool position sensor

1999-07-28

2000-11-28

Lee, Kevin

Fluid handling

With indicator, register, recorder, alarm or inspection means

Position or extent of motion indicator

13762565, F16K 3700, F15B 13044

Patent

active

061521728

ABSTRACT:
A hydraulic control valve has a spool slidably received in a bore of the valve body. The spool can be moved in opposite directions to control flow fluid to and from a pair of workports. A sensor assembly has a coupling attached to the spool and holds a permanent magnet. A Hall effect sensor produces an electrical signal indicating the position of the permanent magnet and thus the spool. A double acting spring assembly biases the coupling and spool with respect to the housing of the sensor when the spool moves in one direction, and biases the coupling and spool with respect to the valve body when the spool moves in the other direction.

REFERENCES:
patent: 4310143 (1982-01-01), Determan
patent: 4538644 (1985-09-01), Knutson et al.
patent: 4635439 (1987-01-01), Wible
patent: 4693272 (1987-09-01), Wilke
patent: 5032812 (1991-07-01), Banick et al.
patent: 5101856 (1992-04-01), Kakinuma et al.
patent: 5244002 (1993-09-01), Frederick
patent: 5565770 (1996-10-01), Jones
patent: 5787915 (1998-08-01), Byers et al.
patent: 5826616 (1998-10-01), Golden

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