Position detecting apparatus for actuator and variable valve...

Details Position detecting apparatus for actuator and variable valve... Position detecting apparatus for actuator and variable valve...

2007-05-08

2007-05-08

Patidar, Jay M. (Department: 2862)

Electricity: measuring and testing

Magnetic

Displacement

C324S207200, C324S207210, C324S207250

Reexamination Certificate

active

11095519

ABSTRACT:
A position detecting apparatus for an actuator includes a linear movement mechanism in which a magnet is provided; a coil which is provided so as to face the magnet such that a magnetic field is formed between the coil and the magnet; and a drive shaft which is connected to the linear movement mechanism through a ball screw, and which is linearly moved in response to rotational movement of the rotor, the rotational movement being caused by energizing the coil; and a magnetic flux detection sensor which detects a change in magnetic flux of the magnet, the change being caused by the rotational movement of the rotor, and which obtains an amount of linear movement of the drive shaft based on the detected change in the magnetic flux.

REFERENCES:
patent: 4989329 (1991-02-01), Pullen
patent: 5742161 (1998-04-01), Karte
patent: 5955881 (1999-09-01), White et al.
patent: 6411082 (2002-06-01), Glasson
patent: 6633157 (2003-10-01), Yamaki et al.
patent: 10003129 (2001-08-01), None
patent: 2002-206423 (2002-07-01), None
patent: 2002-213219 (2002-07-01), None
patent: 2004-48875 (2004-02-01), None
Chinese Office Action dated Sep. 29, 2006 with English Translation thereof.

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