Fluid power cylinder with position indicator

Details Fluid power cylinder with position indicator Fluid power cylinder with position indicator

1995-04-28

1996-10-29

Denion, Thomas E.

Expansible chamber devices

With inspection window in expansible chamber wall portion

With lock

92165PR, F01B 2526

Patent

active

055687601

ABSTRACT:
A fluid power cylinder whose piston rod has on its outer periphery at least one axially extending surface section having the form of a flat. Such surface section has a longitudinal groove, which contains a magnetic strip able to be scanned by a sensor device on the housing. The magnetic strip has alternatingly arranged poles areas in succession, which can be scanned without contact by the sensor device. The magnetic strip is covered by a cover band fixed on the piston rod and consisting of a material allowing the passage of a magnetic field, whose external surface facing away from the magnetic strip constitutes at least a part of the piston rod's surface section having the form of a flat.

REFERENCES:
patent: 4756229 (1988-07-01), Drakeley
patent: 4854218 (1989-08-01), Stoll
patent: 4876945 (1989-10-01), Stoll et al.
patent: 4896584 (1990-01-01), Stoll et al.
patent: 5455509 (1995-10-01), Semura et al.

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