Encoder for measuring both incremental and absolute positions of moving elements

Number of patents in Portfolio can not be more than 2000

United States of America Patent

PATENT NO 4914437
SERIAL NO

07165714

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ATTORNEY / AGENT: (SPONSORED)

Importance

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Abstract

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An optical encoding system for determing the absolute and the incremental positions of a movable member relative to a stationary member. For example, three stationary light sources may be supported by the stationary member for emitting three narrow light beams on respective paths. An encoding band may be supported by the movable member in the paths of the light beams. The band has a timing and incremental encoding track comprising at least one series of alternating light-blocking stripes and light-passing stripes, and a data track comprising a series of distinct absolute position tags. A read head may be supported by the stationary member and has three optical sensors, one for each light beam, two preferably in quadrature with each other for the timing and incremental encoding track, and one for the data track. Each optical sensor includes light sensors for generating an analog signal voltage. A decoding system actuated by these analog signal voltages determines the incremental and absolute position of the movable member relative to the stationary member.

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First Claim

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Patent Owner(s)

Patent OwnerAddressTotal Patents
THE REGENTS OF THE UNIVERSITY OF CALIFORNIAOAKLAND, CA6611

International Classification(s)

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Inventor(s)

Inventor Name Address # of filed Patents Total Citations
Delaney, Calvin R Aptos, CA 2 85
Kibrick, Robert I Santa Cruz, CA 3 290

Cited Art Landscape

Patent Info (Count) # Cites Year
 
THE REGENTS OF THE UNIVERSITY OF CALIFORNIA (1)
* 4736187 Encoder for measuring both incremental and absolute positions of moving elements 33 1986
 
BEI Motion Systems Company, Inc. (1)
* 4628298 Chain code encoder 32 1984
* Cited By Examiner

Patent Citation Ranking

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Patent Info (Count) # Cites Year
 
Other [Check patent profile for assignment information] (3)
* 6288653 Curved surface signal pick-up device 28 1998
* 2005/0270,187 ENCODER INTERFACE 0 2004
* 6970108 Encoder interface 3 2004
 
SEIKO EPSON CORPORATION (1)
* 6038523 Position detector, encoder board, position detecting method, timer and electronic device 20 1998
 
GRAYHILL, INC. (1)
* 7355165 Optical encoder and method for using same 3 2006
 
MARKEM-IMAJE CORPORATION (1)
7046267 Striping and clipping correction 11 2003
 
FUNAI ELECTRIC CO., LTD. (1)
7559711 Method for controlling media feed in an imaging apparatus 0 2005
 
MARKEM CORPORATION (1)
* 2005/0088,510 Low angle optics and reversed optics 2 2003
 
XEROX CORPORATION (1)
7405393 Position encoder 2 2005
 
Haseltine Lake & Co. (1)
* 5173693 Position encoder using a pseudo-random coding sequence 12 1990
 
Pitney Bowes plc. (1)
* 5440500 Settable printing apparatus 0 1993
 
MARKEM TAG, INC. (5)
6791592 Printing a code on a product 36 2003
* 2003/0206,227 Printing a code on a product 12 2003
6829000 Printing a code on a product 35 2003
* 2004/0141,052 Printing a code on a product 0 2003
7167194 Printing a code on a product 19 2003
 
MONEY CONTROLS PLC (1)
* 2003/0121,979 Bar code system 8 2002
 
ROCHE DIABETES CARE, INC. (1)
* 9501730 Optical barcodes having spatially phase shifted clock and reference tracks 0 2015
 
KABUSHIKI KAISHA YASKAWA DENKI (1)
* 2013/0229,138 REFLECTION ENCODER, SERVO MOTOR, AND SERVO UNIT 3 2013
 
SEAGATE TECHNOLOGY LLC (1)
* 8108066 Incremental encoder and serializer 0 2007
 
OTIS ELEVATOR COMPANY (1)
* 5274203 "Smart" position transducer system for elevators 48 1993
 
ROCKWELL INTERNATIONAL CORPORATION (2)
* 5336884 High resolution optical hybrid absolute incremental position encoder 30 1992
* 5451776 High resolution optical hybrid digital-analog linear position encoder 8 1993
 
Vernier Software & Technology, LLC (1)
* 9488503 Cart movement detection system for a dynamics track 0 2014
 
SCHAFT INC. (2)
9261893 Encoder update by using regenerative power 0 2014
9555547 Encoder update by using regenerative power 0 2016
 
MITUTOYO CORPORATION (4)
* 5841274 Induced current absolute position transducer using a code-track-type scale and read head 42 1997
* 6054851 Induced current absolute position transducer method using a code-track-type scale and read head 34 1998
* 7663093 Absolute position encoder having a second incremental track integrated with the absolute track 10 2008
* 9068863 Encoder 0 2013
 
CANON KABUSHIKI KAISHA (1)
* 9810555 Absolute encoder that provides increased accuracy against defect in scale thereof 0 2015
 
NIKON CORPORATION (2)
* 5563408 Absolute encoder having absolute pattern graduations and incremental pattern graduations with phase control 27 1994
* 5438330 Absolute encoder 27 1994
 
NIDEC SR DRIVES LTD. (1)
* 5650779 Position encoder 21 1995
 
SAMSUNG TECHWIN CO., LTD. (2)
* 8658965 Encoder having a pattern track including different-width patterns 0 2011
* 2011/0210,238 ENCODER 1 2011
 
NATIONAL CENTRAL UNIVERSITY (2)
* 7875844 Absolute-type encoder and method for detecting absolute position 8 2008
* 2010/0051,792 ABSOLUTE-TYPE ENCODER AND METHOD FOR DETECTING ABSOLUTE POSITION 4 2008
 
PERCEPTION, INC. (1)
* 5825307 Absolute linear encoder and method of production utilizing index and counter channels 16 1997
 
INSTITUTE OF NUCLEAR ENERGY RESEARCH ATOMIC ENERGY COUNCIL, EXECUTIVE YUAN (1)
* 2012/0076,620 AUXILIARY FEED-IN MECHANISM 0 2011
 
HEWLETT-PACKARD DEVELOPMENT COMPANY, L.P. (3)
* 7463168 Encoder 1 2006
* 7654629 Carriage positioning 0 2006
* 2008/0024,540 Carriage positioning 1 2006
 
MICROCHIPS, INC. (2)
* 6833839 Apparatus and method for multi-resolution color mapping for display devices 2 2002
7154509 Apparatus and method for multi-resolution color mapping for display devices 3 2004
 
Marken Corporation (1)
7394479 Pulsed laser printing 11 2005
 
CSEM CENTRE SUISSE D'ELECTRONIQUE ET DE MICROTECHNIQUE SA (1)
8698892 One-dimension position encoder 0 2009
 
BROOKS AUTOMATION, INC. (5)
* 7882394 Intelligent condition-monitoring and fault diagnostic system for predictive maintenance 39 2006
* 2007/0067,678 Intelligent condition-monitoring and fault diagnostic system for predictive maintenance 98 2006
8356207 Intelligent condition monitoring and fault diagnostic system for preventative maintenance 13 2011
* 2011/0173,496 INTELLIGENT CONDITION MONITORING AND FAULT DIAGNOSTIC SYSTEM FOR PREVENTATIVE MAINTENANCE 28 2011
9104650 Intelligent condition monitoring and fault diagnostic system for preventative maintenance 0 2013
 
CONTROL DEVICES, INC. (1)
* 7289041 Absolute position chain encoder 2 2006
 
DENSO CORPORATION (1)
* 9391550 Shift position switching controller 0 2015
 
ROBERT BOSCH GMBH (2)
* 2011/0083,553 Hydraulic machine 0 2010
* 9599453 Device and method for processing signals which represent an angular position of a motor shaft 0 2011
 
Independence Technology, L.L.C. (2)
* 6946650 Sensor 6 2003
* 2004/0016,875 Sensor 1 2003
 
CNH INDUSTRIAL CANADA, LTD. (2)
9470556 Method and apparatus for sensing position 0 2012
9816841 Method for detecting a position of an actuator 0 2016
 
Gurley Precision Instruments, Inc. (1)
* 6127948 Bidirectional synthesis of pseudorandom sequences for arbitrary encoding resolutions 9 1998
 
TEAC CORPORATION (1)
* 5444613 Device for generating a signal representative of the position of an angularly or linearly moveable member 11 1994
 
KABUSHIKI KAISHA YASKAWA DENKI (1)
8896256 Reflection encoder, servo motor, and servo unit 0 2013
 
CATERPILLAR INC. (3)
7191943 Robust barcode and reader for rod position determination 5 2004
7278574 Robust barcode and reader for rod position determination 0 2007
* 2007/0158,423 Robust barcode and reader for rod position determination 0 2007
 
Westinghouse Air Brake Company (1)
* 6198788 Encoder test apparatus and method 5 1999
* Cited By Examiner