Pneumatic or hydraulic cylinder with piston position detector mounted in longitudinal groove in cylinder tube surface
Number of patents in Portfolio can not be more than 2000
United States of America Patent
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-
Aug 15, 2000
Issued Date -
N/A
app pub date -
Apr 8, 1998
filing date -
Apr 8, 1997
priority date (Note) -
Expired
status (Latency Note)
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Abstract
A pneumatic or hydraulic cylinder (1) includes a cylinder tube (3) consisting of a non-ferromagnetic material in which a piston moves. At least one longitudinal channel (9) is recessed in the outer surface of the cylinder tube in which a signal transmitter (8) is secured to scan the piston location without physical contact. A permanent magnet is located on the piston which activates the signal transmitter (8) by its magnetic field. A leaf spring (17) is provided to secure the signal transmitter (8) in the longitudinal channel (9) and is attached to the housing of the signal transmitter by means of a screw (12) and a nut (19) with an inclined surface (20) that moves outward against the wall of the longitudinal channel (9) when the screw is tightened and thus tightly clamps the signal transmitter (8). The attaching device, consisting of the screw (12) with nut (18) and leaf spring (17), and the signal lead (10) are positioned on the same end of the signal transmitter (8).
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