Patents by Inventor Peter Karlsson

Peter Karlsson 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).

  • Patent number: 6595137
    Abstract: The present invention provides an arrangement for charging energy in an energy-storing arrangement such as an ignition capacitor in electronic ignition systems. To reduce the risk of malfunction, direct-current-controlled breakers controlled by environmental conditions, normally occurring on the primary side of a transformer (4) in series with the primary winding (5) have been replaced by a frequency divider (2) controlled by environmental conditions. This frequency divider divides down a signal supplied by a signal generator (1) pulse train with a lower frequency which controls a breaker (7) connected in series with the primary winding (5) of the transformer.
    Type: Grant
    Filed: October 9, 2001
    Date of Patent: July 22, 2003
    Assignee: Saab AB
    Inventor: Peter Karlsson
  • Patent number: 6435526
    Abstract: A lifting arrangement for a wheel shaft of a vehicle operates on a wheel shaft that is movably suspended in a vehicle frame structure through one or more stay devices. The stay devices are articulatedly connected to the frame structure through at least one frame connection, and to the wheel shaft by at least one shaft connection. A lifting device is arranged in connection with the frame structure and the stay device to raise the wheel shaft in a vertical direction relative to the frame structure when actuated. The stay device provides a compact mechanism to permit the vehicle axle to be lifted, while preserving room for other vehicle components.
    Type: Grant
    Filed: December 15, 1999
    Date of Patent: August 20, 2002
    Assignee: Scania CV Aktiebolag
    Inventor: Peter Karlsson
  • Publication number: 20020079341
    Abstract: Load carrier bar (3) intended to be attached to roof rails mounted on a vehicle roof. The roof rails having two longitudinal rails (2) disposed at a distance from and substantially parallel to each other, the load carrier bar being fitted at each of its ends with a corresponding attachment arrangement (4) intended to be connected with a corresponding rail. Each attachment arrangement includes a connecting means (5), united with the load carrier bar and adapted to be attached to the rail. A tightenable clamp joint (6) encloses the rail and which when tightened unites the load carrier bar to the rail by a rigid and immovable joint. The clamp joint possesses a locking plate (7) which at its first end is hinged to a link (8) connected to the load carrier bar and at its second end is connected with the load carrier bar by means of a demountable tensioned joint (18).
    Type: Application
    Filed: December 21, 2001
    Publication date: June 27, 2002
    Inventor: Peter Karlsson
  • Patent number: 6332618
    Abstract: A metal gasket for preventing leakage of radio frequency signals when mounting shielded radio electronics includes gasket body having a first surface and an opposite second surface and a plurality of spring arms. Each spring arm includes a free proximal portion and a free distal portion and a connection connecting the spring arm to the body portion. Each spring arm is configured so that the distal portion contacts a component proximate the first surface of the body portion and the proximate portion of each spring arm contacts a second component proximate the second surface of the body. Preferably, the distance between adjacent contacts on a component is less than or approximately equal to a predetermined ratio of a shielded radio wavelength.
    Type: Grant
    Filed: September 20, 1999
    Date of Patent: December 25, 2001
    Assignee: Telefonaktiebolaget LM Ericsson (publ)
    Inventor: Peter Karlsson
  • Patent number: 5772603
    Abstract: A device for filtering ECG signals has an A/D converter and a filter unit connected to the converter's output. The filter unit includes a filter, or a combination of filters with a non-linear phase response such that signals with frequencies in the passband of the filter, or the combination of filters, are delayed more than signals with frequencies in the transition band between the passband and the suppressed frequency band of the filter, or the combination of filters. A method for producing an FIR filter, with a phase response opposite to the phase response of a filter for filtering out DC components, or an IIR filter, suitable for use in the above-described device, is also disclosed in which the impulse response from the filter for filtering out DC components and low-frequency components or the IIR filter is reversed in time and sampled. The sampled values are then used for determining coefficients for the FIR filter.
    Type: Grant
    Filed: June 3, 1997
    Date of Patent: June 30, 1998
    Assignee: Siemens-Elema AB
    Inventors: Thomas Ohlsson, Peter Karlsson
  • Patent number: 5690118
    Abstract: In a method for correcting for non-physiological variations in ECG signals, signals recorded during a heartbeat, or a characteristic part of a heartbeat, are conditioned and digitized. Signal samples are stored in the form of an m.times.p matrix, where m is the number of samples and p is the number of leads used from measuring electrodes applied to the patient. The difference between this measuring matrix and a reference matrix is minimized by performing one or more of the operations translation, time synchronization, rotation and scaling of the measuring matrix. An apparatus for correcting for non-physiological variations in ECG signals includes a stage for conditioning signals, picked up by measuring electrodes applied to the patient, an A/D converter for digitizing the signals and a calculation unit. The calculation unit includes a storage unit for storing signal samples in the form of a m.times.
    Type: Grant
    Filed: August 28, 1996
    Date of Patent: November 25, 1997
    Assignee: Siemens Elema AB
    Inventors: Leif Sornmo, Peter Karlsson, Lena Lundstrom
  • Patent number: 5532951
    Abstract: A device for eliminating ringing in filtered ECG signals includes an analog-to-digital for converting the ECG input signals into a series of digital values, and a filter unit connected to the output of the analog-to digital converter. The filter unit includes a recursive IIR-filter and a subsequent allpass filter with a phase shift which is equal to twice the phase shift of the IIR filter. The allpass filtering is performed time-reversed with respect to the IIR filtering. In a method for producing an allpass filter, for use in the above device, having a phase shift which is equal to twice the phase shift of an IIR filter, the IIR filter having zero points situated on the unity circle in the Z-plane, the zero points of the IIR filter are replaced by new zero points obtained by reflecting the poles of the filter in the unity circle in the Z-plane.
    Type: Grant
    Filed: June 27, 1994
    Date of Patent: July 2, 1996
    Assignee: Siemens-Elema AB
    Inventors: Thomas Ohlsson, Peter Karlsson
  • Patent number: 5469856
    Abstract: Method and device for filtering out baseline fluctuations from an electrocardiogram. It is known to provide a high pass filter for filtering out baseline fluctuations from an electrocardiogram, the lower cut off frequency of a high pass filter is at a value below the frequencies which are characteristic of the heart signals at the lowest possible heart rate. In order to increase the effectiveness of the baseline filtering, it is provided that in a device (4) the current heartbeat rate is determined from the electrocardiogram and, in dependence thereupon, the lower cut off frequency of the filter (2) is altered in such a manner that the lower cut off frequency is increased in the case of an increasing heartbeat rate and is decreased in the case of a decreasing heartbeat rate.
    Type: Grant
    Filed: December 22, 1993
    Date of Patent: November 28, 1995
    Assignee: Siemens Aktiengesellschaft
    Inventors: Lena Lundstrom, Peter Karlsson, Thomas Ohlsson
  • Patent number: 5433208
    Abstract: Apparatus for filtering out baseline fluctuations from physiological measurement signals. The apparatus comprises a first nonrecursive low-pass filter with a downstream stage for the reduction of the sampling rate, a second nonrecursive filter connected thereto, a subsequent interpolation stage to increase the sampling rate and a subtraction stage, in which the baseline fluctuations retained by the low-pass filtering are subtracted from the measurement signals affected by baseline fluctuations. To reduce the number of computing operations to be performed in the course of the sampling filtering, the first low-pass filter comprises a recursive filter.
    Type: Grant
    Filed: December 22, 1993
    Date of Patent: July 18, 1995
    Assignee: Siemens Aktiengesellschaft
    Inventors: Lena Lundstrom, Peter Karlsson, Thomas Ohlsson
  • Patent number: 4547908
    Abstract: A cap arrangement is disclosed for sealing the space between the outer surface of a protective helmet and the upper edge of a pivotally mounted visor carried by the helmet, to prevent, for example, sawdust passing to the space on the inside of the visor during timber sawing operations. The cap arrangement comprises a sheet of fabric having a front edge secured to the upper edge of the visor and a rear edge secured to an elastic ribbon attached at its ends to the mountings which pivotally support the visor at the sides of the helmet.
    Type: Grant
    Filed: April 19, 1983
    Date of Patent: October 22, 1985
    Inventors: Peter Karlsson, Leif Palmaer