Fluid pressure cylinder with position detecting device

Details Fluid pressure cylinder with position detecting device Fluid pressure cylinder with position detecting device

2006-06-15

2009-02-24

Lopez, F. Daniel (Department: 3745)

Expansible chamber devices

With inspection window in expansible chamber wall portion

With lock

Reexamination Certificate

active

07493847

ABSTRACT:
In a fluid pressure cylinder with a magnetostriction type position detecting device for detecting an operating position of a piston using the position detecting device, the fluid pressure cylinder is provided with a simple and rational design structure without providing it with a special conductive member as a current feedback conductor. In the fluid pressure cylinder with the magnetostriction type position detecting device having a permanent magnet attached to the piston and a magnetostrictive line accommodated in a hollow portion of a cylinder tube, the cylinder tube is formed of a non-magnetic conductive material, the magnetostrictive line composed of a ferromagnetic material is inserted into the hollow portion, and the extreme end of the magnetostrictive line is electrically connected to the cylinder tube through a support metal fitting, thereby the cylinder tube is also used as a current feedback conductor.

REFERENCES:
patent: 3898555 (1975-08-01), Tellerman
patent: 5514961 (1996-05-01), Stoll et al.
patent: 2004/0196117 (2004-10-01), Kiessling et al.
patent: 9-329409 (1997-12-01), None

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