Electricity: measuring and testing – Magnetic – Displacement
Reexamination Certificate
2006-04-04
2006-04-04
Ledynh, Bot (Department: 2862)
Electricity: measuring and testing
Magnetic
Displacement
C324S205000
Reexamination Certificate
active
07023201
ABSTRACT:
A magnetic position sensor has a stator (16′, 36, 52) formed of magnetic material and a pair of magnets (14a, 14b; 34a, 34b; 54a, 54b; 64a, 64b) rotatably mounted about the stator and movable between opposite angular extremities and spaced from the stator by a primary cylindrical air gap (5). A secondary air gap (4) is formed in a stationary member at a location at which the magnetic field varies with the angular position of the magnets. A first Hall Effect sensor (18) is disposed in the secondary air gap to measure the magnetic field there-across as an indication of the angular position of the magnets. A second reference sensor (22) is provided to detect the magnetic decay of the magnets. The second sensor can be a Hall Effect sensor disposed at a location at which the magnetic field is relatively constant, independent of the angular position of the magnets. The reference sensor output can be used as a diagnostic indicator or as a correction for the first sensor output.
REFERENCES:
patent: 2347563 (1944-04-01), Keller
patent: 3194990 (1965-07-01), Kendall
patent: 4492922 (1985-01-01), Ohkubo
patent: 4769597 (1988-09-01), Sano
patent: 5444369 (1995-08-01), Luetzow
patent: 5528139 (1996-06-01), Audet et al.
patent: 5789917 (1998-08-01), Audet et al.
patent: 5943639 (1999-08-01), Tanaka et al.
patent: 6130535 (2000-10-01), Herden et al.
patent: 6201389 (2001-03-01), Apel et al.
patent: 6232771 (2001-05-01), Herden et al.
patent: 6310473 (2001-10-01), Zhao
patent: 6323642 (2001-11-01), Nishimura et al.
patent: 6326780 (2001-12-01), Striker
patent: 6414482 (2002-07-01), Mase
patent: 6479987 (2002-11-01), Marx et al.
patent: 6509734 (2003-01-01), Luetzow
patent: 6566860 (2003-05-01), Lin et al.
patent: 6593734 (2003-07-01), Gandel et al.
patent: 6642710 (2003-11-01), Morrison et al.
patent: 6720763 (2004-04-01), Nehl et al.
patent: 0830563 (2003-08-01), None
Crowe Keith E.
Matsutomo Masashi
Mikawa Yoshihiko
Sogge Dale R.
Baumann Russell E.
Ledynh Bot
Telecky , Jr. Frederick J.
Texas Instruments Incorporated
Whittington Kenneth
LandOfFree
Magnetic position sensor apparatus and method does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Magnetic position sensor apparatus and method, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Magnetic position sensor apparatus and method will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-3577397