Patents by Inventor Richard L. Stoolmaker

Richard L. Stoolmaker 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).

  • Interface circuit for processor controlled system and vehicle laundry system utilizing such interface circuit
    Patent number: 6381503
    Abstract: A smart module circuit board carries a programmable microprocessor and a plurality of relay type interface circuits for use in organizing relatively high voltage input devices and output devices into a complex system wherein a programmed combination of input device signals determines when and if to energize one or more output devices in the system. The interface circuit comprises input and output stages which operate on logic level voltages and which are decoupled by opto-couplers from a relatively high voltage energization circuit which passes through a relatively high voltage electrical device. The energization circuit comprises a triac which is operated by the output stage in response to outputs from the microprocessor, a manual switch connected in parallel with the triac so that a given electrical load device can be manually activated and a multi-colored LED for indicating the conditions of the input and output circuits individually and in combination.
    Type: Grant
    Filed: January 12, 1999
    Date of Patent: April 30, 2002
    Assignee: Belanger, Inc.
    Inventors: Kenneth J. Dollhopf, Richard L. Stoolmaker
  • Interface circuit for processor controlled system and vehicle laundry system utilizing such interface circuit
    Patent number: 5883816
    Abstract: A smart module circuit board carries a programmable microprocessor and a plurality of relay type interface circuits for use in organizing relatively high voltage input devices and output devices into a complex system wherein a programmed combination of input device signals determines when and if to energize one or more output devices in the system. The interface circuit comprises input and output stages which operate on logic level voltages and which are decoupled by opto-couplers from a relatively high voltage energization circuit which passes through a relatively high voltage electrical device. The energization circuit comprises a triac which is operated by the output stage in response to outputs from the microprocessor, a manual switch connected in parallel with the triac so that a given electrical load device can be manually activated and a multi-colored LED for indicating the conditions of the input and output circuits individually and in combination.
    Type: Grant
    Filed: October 13, 1995
    Date of Patent: March 16, 1999
    Assignee: Belanger, Inc.
    Inventors: Kenneth J. Dollhopf, Richard L. Stoolmaker