Patents Assigned to Electromed International
  • Patent number: 5966425
    Abstract: A high-voltage power supply and regulator circuit for an X-ray tube which utilizes solid-state switching devices with feedback control for real time monitoring and protection against failure due to excess current or voltage spikes. The apparatus includes a DC supply circuit utilizing a first feedback control loop and silicon controlled rectifiers to regulate the output of a high-voltage transformer. The apparatus further includes a regulator circuit utilizing a second feedback control loop and a series of FETs to produce a continuous or pulsed output of precise magnitude and phase. Shielded voltage dividers are provided to accurately measure the voltage outputs and produce feedback control signals. Discharge modules on the high-voltage cables connecting the power supplying X-ray tube discharge any capacitive voltage remaining on the cables between pulses, so as to eliminate any tail on the output waveform.
    Type: Grant
    Filed: June 22, 1993
    Date of Patent: October 12, 1999
    Assignee: Electromed International
    Inventor: Robert Beland
  • Patent number: 5391977
    Abstract: A high-voltage power supply and regulator circuit for an X-ray tube which utilizes solid-state switching devices with feed-back control for real-time monitoring and protection against voltage spikes. More specifically, the regulator circuit utilizes a feedback control loop and a series of FET to produce a continuous or pulsed output of predetermined duration and/or amplitude. Shielded voltage dividers are provided to accurately measure the voltage output and produce feedback control signals. The shielded voltage divider includes a plurality of paired conductive members disposed along the length of a resistor, which paired conductive members separate the resistor into separate portions and provide alternating first and second pairs of conductive members along the length of the resistor.
    Type: Grant
    Filed: June 4, 1993
    Date of Patent: February 21, 1995
    Assignee: Electromed InternationaL
    Inventor: Robert Beland
  • Patent number: 5388139
    Abstract: Apparatus for supplying operating power to an X-ray generating source, wherein the source sends a radiation signal to a patient and a portion of the signal which passes through the patient is utilized to produce an image of the patient, the apparatus comprising a power supply which includes a mechanism for receiving a low-voltage input signal and a voltage transforming and combining mechanism for producing a high voltage signal; and a mechanism for monitoring the high-voltage supply signal, a mechanism for receiving the supply signal and regulating the duration or amplitude of the supply signal to produce a high-voltage regulated output signal for operating the X-ray generating source, and a mechanism for receiving X-ray radiation which has passed through a patient and generating a feedback signal representative thereof which enables automatic control of the amount of X-ray radiation received by the patient.
    Type: Grant
    Filed: June 4, 1993
    Date of Patent: February 7, 1995
    Assignee: Electromed International
    Inventor: Robert Beland
  • Patent number: 5241260
    Abstract: A high-voltage power supply and regulator circuit for an X-ray tube which utilizes solid-state switching devices with feedback control for real time monitoring and protection against failure due to excess current or voltage spikes. The apparatus includes a DC supply circuit utilizing a first feedback control loop and silicon controlled rectifiers to regulate the output of a high-voltage transformer. The apparatus further includes a regulator circuit utilizing a second feedback control loop and a series of FETs to product a continuous or pulsed output of precise magnitude and phase. Shielded voltage dividers are provided to accurately measure the voltage outputs and produce feedback control signals. Discharge modules on the high-voltage cables connecting the power supply to the X-ray tube discharge any capacitive voltage remaining on the cables between pulses, so as to eliminate any tail on the output waveform.
    Type: Grant
    Filed: August 18, 1992
    Date of Patent: August 31, 1993
    Assignee: Electromed International
    Inventor: Robert Beland