Patents by Inventor Bo Pettersson

Bo Pettersson has filed for patents to protect the following inventions. This listing includes patent applications that are pending as well as patents that have already been granted by the United States Patent and Trademark Office (USPTO).

  • Publication number: 20080256814
    Abstract: An adjustment arrangement for a measuring head, in particular an adjustment arrangement in order to simplify the calibration of a measurement probe (3) supported by a measuring head in a coordinate measuring machine, where the adjustment arrangement includes an element for the determination of the measured position of the probe ball (7), and where an element is arranged to turn or displace, or both, the probe ball in order to determine a newly measured position of the probe ball, whereby the offset of the probe ball (7) can be determined.
    Type: Application
    Filed: November 15, 2006
    Publication date: October 23, 2008
    Applicant: Hexagon Metrology AB
    Inventor: Bo Pettersson
  • Publication number: 20080257023
    Abstract: A method for scanning a surface of a workpiece 1 at a constant scanning speed /va/ using a scanning probe 2 mounted on a support 3 on a coordinate measuring machine (CMM) 4. The CMM contains a first set of drive means (6, 7, 8) to move the support according to three linear axis (x,y,z), and the support 3 contains a second set of drive means (14, 17) for actuating the movement of the scanning probe 2 with two degrees of freedom relative to said support 3. The method involves control means 33 coupled to the sets of drive means (6, 14, 17), and memory means for storing theoretical profiles and coordinates of the surface to scan.
    Type: Application
    Filed: March 21, 2008
    Publication date: October 23, 2008
    Applicant: Hexagon Metrology AB
    Inventors: Pascal Jordil, Bo Pettersson, Siercks Knut, William Wilcox
  • Publication number: 20080249737
    Abstract: A method for scanning a surface of a workpiece using a scanning probe 2 mounted on a support 3 on a coordinate measuring machine 4. The support contains drive means 5, 7 for actuating the movement of the scanning probe 2 relatively to the support 3. The method further involves detecting means 9 to measure a contact force F applied between the tip 10 of the probe and the surface 1, control means 13 coupled to the drive means, and memory means 14 for storing theoretical profiles 19 and coordinates 20 of the surface. This method is characterized by the fact that the control means 13 adjust the actuation of the drive means 5, 7 along a scanning path 18 in order to maintain the contact force 11 within the defined range of values 15 during the whole scanning operation along the scanning path 18.
    Type: Application
    Filed: March 17, 2008
    Publication date: October 9, 2008
    Applicant: HEXAGON METROLOGY AB
    Inventors: Pascal Jordil, Bo Pettersson, Siercks Knut
  • Publication number: 20080235969
    Abstract: The positioning and measuring system includes a coordinate positioning machine comprising a movable spindle (60) movable relative to a reference surface 30, a rotor (100) rotatably connected with the movable spindle, an actuator (500) for driving the rotor (100) in rotation around a rotation axis (65), and a coordinate probe (150, 190) detachably connectable to the rotor (100) for measuring coordinate of points (350) of a workpiece (200, 201, 250) along a path resulting from the composition of a translation movement of the spindle (60) and a rotation of the rotor (100). The points (350) are offset (r) with respect to the rotation axis (65) of the rotor (100).
    Type: Application
    Filed: March 13, 2008
    Publication date: October 2, 2008
    Applicant: HEXAGON METROLOGY AB
    Inventors: Pascal Jordil, Siercks Knut, Bo Pettersson, Klaus Schneider
  • Publication number: 20080196260
    Abstract: A measurement method and a measuring device for use in measurement systems such as co-ordinate measurement machines and similar, where a position sensor is arranged to register its position in order to determine the form and dimensions of an object. The position sensor is supported by a support, the position and orientation of which are determined through calculation with the aid of data from at least one of accelerometers, GPS receivers and gyroscopes, and based on a known starting position.
    Type: Application
    Filed: August 3, 2006
    Publication date: August 21, 2008
    Applicant: HEXAGON AB
    Inventor: Bo Pettersson
  • Publication number: 20080120860
    Abstract: A co-ordinate measuring machine to determine the co ordinates of a number of points on the surface of a measurement object, including a support beam (4) that supports a measurement head over the surface of a support table (1) that supports the measurement object, the co ordinates of which are to be measured. The support beam (4) is supported above the support table (1) by two legs (7, 8) that are not only possible to displace together along the support table (1) in order to displace the support beam (4) and the measurement head forwards and backwards in a direction relative to the support table (1), but also it is possible to displace the legs (7, 8) relative to each other in different directions along the support table (1) in order to raise and lower the support beam (4) and the measurement head relative to the support table.
    Type: Application
    Filed: December 6, 2005
    Publication date: May 29, 2008
    Applicant: HEXAGON METROLOGY AB
    Inventor: Bo Pettersson
  • Publication number: 20080034601
    Abstract: A measurement probe for use in coordinate measuring machines, which probe comprises a base (1) connected to a coordinate measuring machine, a measurement tip (4) and a ball (5) arranged at the first end of the measurement tip (4). The measurement tip (4) is supported at its second end with the aid of at least three rigid supports (2) supported by the base (1), whereby the supports (2) are connected to the measurement tip by means of spherical connections and where the supports (2) can be displaced along their longitudinal directions relative to the base (1). The supports (2) are arranged such that they pass through the base (1), and can be displaced along their longitudinal directions by protruding to a greater or lesser degree on the side of the base (1) that is opposite relative to the measurement tip holder (3).
    Type: Application
    Filed: June 20, 2005
    Publication date: February 14, 2008
    Inventor: Bo Pettersson
  • Publication number: 20070220767
    Abstract: A coordinate measuring machine to determine the coordinates of a number of points on the surface of a measured object, includes a support beam, supporting a measuring head over the surface of a support table that supports the test object. The measuring machine is constructed from separately manufactured units, which include at least a support beam, a measurement trolley and a measurement head. The support beam supports the measurement trolley, which is displaceable along the support beam. The measurement trolley in turn supports the measurement head. The beam, head and trolley are individually calibrated, and the trolley includes both mechanical and electrical attachment points for the head and the beam, where the mechanical attachment points are designed such that no geometric deformation can take place when these units are joined together such that the units, which have been individually manufactured, can be simply joined to the coordinate measuring machine.
    Type: Application
    Filed: April 14, 2005
    Publication date: September 27, 2007
    Applicant: HEXAGON METROLOGY AB
    Inventor: Bo Pettersson
  • Patent number: 7176264
    Abstract: A process for manufacture of a dendritic polyether comprising a core, derived from a compound having two or more hydroxyl groups, and at least one branching generation being built up from at least one hydroxyoxetane having one oxetane group and at least one hydroxyl group is disclosed. The process comprises ring opening addition to said core and ring opening polymerization of said hydroxyoxetane. A mixture of the core compound and at least one cationic initiator is prepared and said hydroxyoxetane is fed to said mixture at a rate resulting in and/or maintaining a reaction temperature below onset at thermal degradation and in an amount resulting in at least one branching generation. The initiator is present in an amount of 0.1–0.5% by weight calculated on said core and said oxetane, preferably in an amount giving a ratio hydroxyl groups to initiator of between 1:0.01 and 1:0.05. Yielded dendritic polyether is sebsequently neutralised by addition of at least one alkaline compound and optionally purified.
    Type: Grant
    Filed: November 12, 2001
    Date of Patent: February 13, 2007
    Assignee: Perstorp Specialty Chemicals AB
    Inventors: Bo Pettersson, David James, Birger Midelf, Hakan Bjornberg, Nicola Rehnberg
  • Publication number: 20050283989
    Abstract: A method of inspecting a series of workpieces including a calibration step in which calibration data are obtained by measuring a reference workpiece in a high accuracy measuring device in laboratory conditions, a mastering step in which mastering data are obtained by measuring the reference workpiece on a measuring machine in production conditions, a workpiece inspection step whereby workpiece inspection data are obtained by measuring another workpiece from said series of workpieces on the measuring machine in the production conditions, and a compensation step in which measurement results obtained in the workpiece inspection step are corrected by using the calibration data and the mastering data.
    Type: Application
    Filed: May 10, 2005
    Publication date: December 29, 2005
    Inventor: Bo Pettersson
  • Patent number: 6943565
    Abstract: A robot arm for industrial robots comprises one or several jointed arms (1,1c) that are mutually connected to each other by means of rotary joints (1a, 1b), and a jointed arm (1) connected to a base (3), in which an angle transducer is arranged in the rotary joints (1a,1b) in order to measure exactly the angular relationship between the jointed arms (1,1c) or between the jointed arm (1) and the base (3), in order to make possible adjustment of the robot arm into the desired angular position.
    Type: Grant
    Filed: August 20, 2001
    Date of Patent: September 13, 2005
    Assignee: C E Johansson AB
    Inventors: Bo Pettersson, Carl-Erik Gustafsson
  • Patent number: 6940278
    Abstract: An angle transducer comprising a first disk, the rotor, with circularly arranged and radially directed receiver electrodes and a second disk, the stator, equipped with circularly arranged and radially directed transmitter electrodes arranged at the same radius as the receiver electrodes and with a fixed separation between the receiver and transmitter electrodes, whereby the disks are arranged coaxially and rotatable relative to each other, and the disks are further separated by a thin air-gap. The transmitter electrodes are each supplied with an alternating voltage with different phases for neighboring electrodes, whereby the number of supply phases, ?, is greater than two, and the separation of the transmitter electrodes=the separation of receiver electrodes/?. The transmitter electrodes of the stator are geometrically arranged such that errors in their geometry relative to the geometry of the receiver electrodes produce equal but opposite error signal in the receiver electrodes of the rotor.
    Type: Grant
    Filed: August 20, 2001
    Date of Patent: September 6, 2005
    Assignee: C E Johansson AB
    Inventors: Bo Pettersson, Carl-Erik Gustafsson
  • Patent number: 6845261
    Abstract: An MR system correlates MR images with acquired physiological data. MR image data and physiological data is acquired through two independent pipelines. Both pipelines range from analog to digital conversion to image or data display. The pipelines are synchronized by triggers calculated from data contained in the physiological pipeline which are then used to trigger the acquisition of data in the MR image pipeline. Another embodiment includes time synchronization of a distributed acquisition and processing system having the ability to correlate physiological and MR data using a common time base and the ability to selectively store physiological data. Simplified network time protocol is used to synchronize timers and a separate data conduit is used for sending physiological data to the data store process. This supports different modes of synchronization between acquisition and the physiological signal.
    Type: Grant
    Filed: April 23, 2001
    Date of Patent: January 18, 2005
    Assignee: General Electric Company
    Inventors: Bo Pettersson, Robert Holden Haworth
  • Publication number: 20040059086
    Abstract: A process for manufacture of a dendritic polyether comprising a core, derived from a compound having two or more hydroxyl groups, and at least one branching generation being built up from at least one hydroxyoxetane having one oxetane group and at least one hydroxyl group is disclosed. The process comprises ring opening addition to said core and ring opening polymerisation of said hydroxyoxetane. A mixture of the core compound and at least one cationic initiator is prepared and said hydroxyoxetane is fed to said mixture at a rate resulting in and/or maintaining a reaction temperature below onset at thermal degradation and in an amount resulting in at least one branching generation. The initiator is present in an amount of 0.1-0.5% by weight calculated on said core and said oxetane, preferably in an amount giving a ratio hydroxyl groups to initiator of between 1:0.01 and 1:0.05. Yielded dendritic polyether is sebsequently neutralised by addition of at least one alkaline compound and optionally purified.
    Type: Application
    Filed: July 7, 2003
    Publication date: March 25, 2004
    Inventors: Bo Pettersson, David James, Birger Midelf, Hakan Bjornberg, Nicola Rehnberg
  • Patent number: 6706476
    Abstract: This invention relates to a method wherein special adaptors and primers are used for single stranded cDNA amplification. The method comprises contacting RNA with an anchored cDNA synthesis primer which can anneal to RNA, a suitable enzyme which possesses reverse transcriptase activity, and a special designed adaptor which can efficiently be ligated to the 3′ end of single stranded cDNA by T4 DNA ligase. Processes are provided for using specific primers annealing to the adaptors in the 5′ and 3′-end of the single stranded cDNA for PCR amplifying the cDNA. The invention describes the use of this approach for generation of probes starting from low amounts of RNA to be used e.g. in hybridization towards micro-arrays.
    Type: Grant
    Filed: March 9, 2001
    Date of Patent: March 16, 2004
    Assignee: Azign Bioscience A/S
    Inventors: Kenneth Thirstrup, Peter Warthoe, Niels Bo Pettersson
  • Publication number: 20040046548
    Abstract: An angle transducer comprising a first disk, the rotor, with circularly arranged and radially directed receiver electrodes and a second disk, the stator, equipped with circularly arranged and radially directed transmitter electrodes arranged at the same radius as the receiver electrodes and with a fixed separation between the receiver and transmitter electrodes, whereby the disks are arranged coaxially and rotatable relative to each other, and the disks are further separated by a thin air-gap. The transmitter electrodes are each supplied with an alternating voltage with different phases for neighboring electrodes, whereby the number of supply phases, &phgr;, is greater than two, and the separation of the transmitter electrodes=the separation of receiver electrodes/&phgr;.
    Type: Application
    Filed: August 11, 2003
    Publication date: March 11, 2004
    Inventors: Bo Pettersson, Carl-Erik Gustafsson
  • Publication number: 20040027139
    Abstract: A robot arm for industrial robots comprises one or several jointed arms (1, 1c) that are mutually connected to each other by means of rotary joints (1a, 1b), and a jointed arm (1) connected to a base (3), in which an angle transducer is arranged in the rotary joints (1a, 1b) in order to measure exactly the angular relationship between the jointed arms (1, 1c) or between the jointed arm (1) and the base (3), in order to make possible adjustment of the robot arm into the desired angular position.
    Type: Application
    Filed: June 23, 2003
    Publication date: February 12, 2004
    Inventors: Bo Pettersson, Carl-Erik Gustafsson
  • Patent number: 6564081
    Abstract: The present invention provides a system and method of increasing the sampling rate for MR data acquisition. By implementing ensemble sampling techniques, the present invention provides higher data sampling rates that are useful for several MR data acquisition applications including Echo Planar Imaging, Functional Magnetic Resonance Imaging, and Sensitivity Encoding Imaging (SENSE) techniques. By multiplying an MR signal by a series of pure sinusoids having the same frequency but shifted by an incremental phase, the MR signal may be separated into a number of channels which can be sampled at lower rates by analog-to-digital converters. The output from the converters may then be reconstructed using one of a number of interpolation techniques to create a single digital channel with increased bandwidth. The single channel with increased bandwidth may then be used to acquire MR data with an improved sampling rate.
    Type: Grant
    Filed: October 31, 2001
    Date of Patent: May 13, 2003
    Assignee: GE Medical Systems Global Technology Co. LLC
    Inventors: Frederick J. Frigo, Bruce D. Collick, Louis M. Frigo, Michael R. Hartley, Bo Pettersson
  • Publication number: 20030083568
    Abstract: The present invention provides a system and method of increasing the sampling rate for MR data acquisition overcoming the aforementioned drawbacks. By implementing ensemble sampling techniques, the present invention provides higher data sampling rates that are useful for several MR data acquisition applications including Echo Planar Imaging, Functional Magnetic Resonance Imaging, and Sensitivity Encoding Imaging (SENSE) techniques. By multiplying an MR signal by a series of pure sinusoids having the same frequency but shifted by an incremental phase, the MR signal may be separated into a number of channels which can be sampled at lower rates by analog-to-digital converters. The output from the converters may then be reconstructed using one of a number of interpolation techniques to create a single digital channel with increased bandwidth. The single channel with increased bandwidth may then be used to acquire MR data with an improved sampling rate.
    Type: Application
    Filed: October 31, 2001
    Publication date: May 1, 2003
    Inventors: Frederick J. Frigo, Bruce D. Collick, Louis M. Frigo, Michael R. Hartley, Bo Pettersson
  • Publication number: 20020156367
    Abstract: An MR system correlates MR images with acquired physiological data. MR image data and physiological data is acquired through two independent pipelines. Both pipelines range from analog to digital conversion to image or data display. The pipelines are synchronized by triggers calculated from data contained in the physiological pipeline which are then used to trigger the acquisition of data in the MR image pipeline. Another embodiment includes time synchronization of a distributed acquisition and processing system having the ability to correlate physiological and MR data using a common time base and the ability to selectively store physiological data. Simplified network time protocol is used to synchronize timers and a separate data conduit is used for sending physiological data to the data store process. This supports different modes of synchronization between acquisition and the physiological signal.
    Type: Application
    Filed: April 23, 2001
    Publication date: October 24, 2002
    Inventors: Bo Pettersson, Robert Holden Haworth