Magnetic sensor with rectangular field distorting flux bar

Number of patents in Portfolio can not be more than 2000

United States of America Patent

PATENT NO 5041784
SERIAL NO

07437129

Stats

ATTORNEY / AGENT: (SPONSORED)

Importance

Loading Importance Indicators... loading....

Abstract

See full text

A magnetic sensor for use in measuring the position, velocity, and/or direction of movement of an object having alternating zones of magnetic conductivity with a permanent magnet member having a pole face facing the moving object and having an axis transverse to the direction of movement thereof. A ferromagnetic strip of high permeability is mounted on the face of the magnet coaxial therewith having a length dimension in the direction of movement of the object greater than the width dimension transverse to the direction of movement. The ferromagnetic strip distorts the field of the permanent magnetic member in the area of a pair of the sensor elements such that the flux lines in the area of each of the sensors are urged toward a transverse direction relative to the direction of movement of the object, whereby the flux field in the area of each of the sensor is uniform.

Loading the Abstract Image... loading....

First Claim

See full text

Family

Loading Family data... loading....

Patent Owner(s)

Patent OwnerAddressTotal Patents
VISI-TRAK WORLDWIDE, LLCVALLEY VIEW, OH2

International Classification(s)

  • [Classification Symbol]
  • [Patents Count]

Inventor(s)

Inventor Name Address # of filed Patents Total Citations
Griebeler, Elmer L Streetsboro, OH 14 189

Cited Art Landscape

Patent Info (Count) # Cites Year
 
DR. JOHANNES HEIDENHAIN GMBH (1)
* 4612502 Magnetic length or angle measuring system having improved magnetic sensor arrangement 21 1983
 
Other [Check patent profile for assignment information] (2)
* 4311981 Magnetic switch 12 1980
* 4647892 Dual magnetic sensor 20 1984
 
ROBERT BOSCH GMBH (1)
* 4727323 Magneto-resistive differential sensor system 19 1985
 
NIPPON GAKKI SEIZO KABUSHIKI KAISHA (1)
* 4944028 Non-contact type pattern sensor with variable clearance compensation 10 1988
 
MID-AMERICA COMMERCIALIZATION CORPORATION (1)
* 4914389 Multiturn shaft position sensor with backlash compensation 27 1988
 
ALLEGRO MICROSYSTEMS, INC. (2)
* 4859941 Proximity selectro with integral magnet, pole-piece plate and pair of magnetic transducers 32 1987
* 4935698 Sensor having dual Hall IC, pole piece and magnet 42 1989
 
HITACHI, LTD. (1)
* 4853632 Apparatus for magnetically detecting a position of a movable magnetic body 32 1981
 
Messerschmitt-Bolkow-Blohm GmbH (1)
* 4611169 Sensor for measuring relative movement between a vehicle and a track by sensing magnetic field distortions 9 1983
* Cited By Examiner

Patent Citation Ranking

Forward Cite Landscape

Patent Info (Count) # Cites Year
 
Other [Check patent profile for assignment information] (1)
6529008 Electromagnetic induction coil sensor 3 2000
 
UNIVERSITY OF VIRGINIA (2)
7460979 Method and system for enhanced resolution, automatically-calibrated position sensor 6 2004
* 2007/0055,461 Method and system for enhanced resolution, automatically-calibrated position sensor 1 2004
 
LAKE SHORE CRYOTRONICS, INC. (6)
* 5293125 Self-aligning tachometer with interchangeable elements for different resolution outputs 27 1992
* 5336994 Magneto-resistive tachometer assembly with reversible cover and related method 1 1992
* 5495758 Tachometer assembly with integral internal wrench 8 1993
* 5514955 Slim profile digital tachometer including planar block and rotor having spokes and clamp 0 1994
* 5654633 Magneto-resistive tachometer sensor module with different resolution outputs for the same magnetic drum 8 1995
* 5900727 Magneto-resistive tachometer kit including two sensor modules providing different resolution quadrature outputs from the same rotor 6 1997
 
CNH INDUSTRIAL CANADA, LTD. (1)
9572296 Remote leveling of tillage implements 0 2014
 
SCHLUMBERGER TECHNOLOGY CORPORATION (2)
* 8836325 Valve position sensor 0 2009
* 2011/0260,715 VALVE POSITION SENSOR 0 2009
 
VISI-TRAK WORLDWIDE, LLC (1)
* 5471736 Magnetic sensor with laminated field concentrating flux bar 7 1994
 
HONEYWELL INC. (1)
* 5351028 Magnetoresistive proximity sensor 21 1993
 
Actodyne General, Inc. (6)
* 5438157 Acoustic pick-up assembly for a stringed musical instrument 8 1993
* 5401900 Mounting assembly for an acoustic pick-up 14 1993
* 5336845 Pick-up assembly for a stringed musical instrument 11 1993
* 5464948 Sensor assembly for a stringed musical instrument 17 1994
* 5641932 Sensor assembly for stringed musical instruments 11 1995
* 5684263 Electromagnetic sensor assembly for musical instruments having a magnetic lining 1 1995
 
MINEBEA CO., LTD. (1)
* 2005/0168,091 Variable reluctance resolver and method and apparatus for manufacturing same 3 2004
 
SENSATA TECHNOLOGIES, INC. (3)
* 5469055 Engine shaft with integrally formed complementary targets 10 1994
* 5500589 Method for calibrating a sensor by moving a magnet while monitoring an output signal from a magnetically sensitive component 36 1995
* 5488294 Magnetic sensor with means for retaining a magnet at a precise calibrated position 34 1995
 
NorthStar Technologies Inc. (2)
6246233 Magnetoresistive sensor with reduced output signal jitter and temperature compensation 22 1997
6300758 Magnetoresistive sensor with reduced output signal jitter 21 1999
* Cited By Examiner