Patents by Inventor Douglas A. Switzer

Douglas A. Switzer 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).

  • Electronic stroke sensor for air disc brake with inspection port
    Patent number: 9440633
    Abstract: A brake actuator assembly for an air disk brake includes an actuator housing having a pushrod that is extensible from the actuator housing. A lever arm is disposed inside a caliper housing. The lever arm is actuated by the pushrod for transferring motion from the actuator to a brake pad. A sensor element is disposed between the actuator housing and the caliper housing with the sensor element being sealably engaged to the actuator housing providing an air tight enclosure between the caliper housing and the actuator. An inspection port is disposed in the sensor element providing access to receive a visual sensor and a pressure sensor for identifying a condition of the brake actuator and for identifying a condition of the air tight enclosure.
    Type: Grant
    Filed: November 18, 2014
    Date of Patent: September 13, 2016
    Assignee: INDIAN HEAD INDUSTRIES, INC.
    Inventors: Jeff Douglas Switzer, Steve Lepard, Mark David Chandler
  • ELECTRONIC STROKE SENSOR FOR AIR DISC BRAKE WITH INSPECTION PORT
    Publication number: 20150068851
    Abstract: A brake actuator assembly for an air disk brake includes an actuator housing having a pushrod that is extensible from the actuator housing. A lever arm is disposed inside a caliper housing. The lever arm is actuated by the pushrod for transferring motion from the actuator to a brake pad. A sensor element is disposed between the actuator housing and the caliper housing with the sensor element being sealably engaged to the actuator housing providing an air tight enclosure between the caliper housing and the actuator. An inspection port is disposed in the sensor element providing access to receive a visual sensor and a pressure sensor for identifying a condition of the brake actuator and for identifying a condition of the air tight enclosure.
    Type: Application
    Filed: November 18, 2014
    Publication date: March 12, 2015
    Inventors: Jeff Douglas Switzer, Steve Lepard, Mark David Chandler
  • Board game
    Patent number: D416949
    Type: Grant
    Filed: June 8, 1998
    Date of Patent: November 23, 1999
    Assignee: 765409 Ontario Ltd.
    Inventor: Douglas A. Switzer