Hydraulic valve with spool position sensing assembly

Details Hydraulic valve with spool position sensing assembly Hydraulic valve with spool position sensing assembly

2011-02-15

2011-02-15

Rivell, John (Department: 3753)

Fluid handling

With indicator, register, recorder, alarm or inspection means

Position or extent of motion indicator

C137S625250

Reexamination Certificate

active

07886767

ABSTRACT:
A hydraulic valve includes a valve body, a valve spool that is movable relative to the valve body for controlling fluid flow through the valve body, and a spool return assembly for biasing the valve spool into a centered position relative to the valve body. The hydraulic valve further includes a position sensor assembly having a sensor portion affixed relative to the valve body and a movable portion that is movable relative to the sensor portion in response to movement of the valve spool. The sensor portion is responsive to a position of the movable portion for outputting a signal indicative of the position of the valve spool relative to the valve body. The movable portion of the position sensor assembly is biased into engagement with the spool return assembly.

REFERENCES:
patent: 4793241 (1988-12-01), Mano et al.
patent: 5926018 (1999-07-01), Jones
patent: 6152172 (2000-11-01), Christianson et al.
patent: 6789570 (2004-09-01), Beyrak et al.
patent: 2005/0092100 (2005-05-01), Lehker et al.
patent: 20070076750 (2007-07-01), None
Parker Hannifin Corporation, Elyria, Ohio, USA, Series V10 Directional Control Valve, Bulletin HY14-2701-B1/US, Feb. 1, 2004, pp. 4 & 5.

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