Switching valve with position detecting mechanism

Details Switching valve with position detecting mechanism Switching valve with position detecting mechanism

2007-04-24

2007-04-24

Chambers, A. Michael (Department: 3753)

Fluid handling

With indicator, register, recorder, alarm or inspection means

Position or extent of motion indicator

C137S553000, C251S030010, C251S285000, C251S366000

Reexamination Certificate

active

11338695

ABSTRACT:
In a switching valve containing a valve member for opening and closing a valve seat and a piston for driving the valve member by the action of a pilot fluid pressure inside a valve housing, a magnet for positional detection is attached to the piston, two sensor attachment grooves extending in the direction of the axial line L of the switching valve and having different groove lengths in accordance with the operational position are formed in parallel on the side face of the valve housing, and magnetic sensors are attached at locations on the side of the innermost end wall in the attachment grooves.

REFERENCES:
patent: 4004258 (1977-01-01), Arnold
patent: 4341241 (1982-07-01), Baker
patent: 4478345 (1984-10-01), Edinger
patent: 5329956 (1994-07-01), Marriott et al.
patent: 6481460 (2002-11-01), Fukano et al.
patent: 1 195 528 (2002-04-01), None
patent: 2001-193845 (2001-07-01), None
patent: 2001-193846 (2001-07-01), None

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