Patents by Inventor Rick Choy

Rick Choy 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).

  • Automatic safety shut-off switch for exercise equipment
    Publication number: 20060229162
    Abstract: The present invention relates to a safety off switch for a treadmill exercise device. If the treadmill exercise device running belt is still rotating even after user has left the treadmill exercise device, then, after a programmed time duration, the treadmill exercise device automatically turns off the running belt and/or completely powers itself down.
    Type: Application
    Filed: February 13, 2006
    Publication date: October 12, 2006
    Inventor: Rick Choy
  • Automatic safety shut-off switch for exercise equipment
    Patent number: 6997855
    Abstract: The present invention relates to a safety off switch for a treadmill exercise device. If the treadmill exercise device running belt is still rotating even after user has left the treadmill exercise device, then, after a programmed time duration, the treadmill exercise device automatically turns off the running belt and/or completely powers itself down.
    Type: Grant
    Filed: April 22, 2003
    Date of Patent: February 14, 2006
    Assignee: Unisen, Inc.
    Inventor: Rick Choy
  • Automatic safety shut-off switch for exercise equipment
    Publication number: 20050075219
    Abstract: The present invention relates to a safety off switch for a treadmill exercise device. If the treadmill exercise device running belt is still rotating even after user has left the treadmill exercise device, then, after a programmed time duration, the treadmill exercise device automatically turns off the running belt and/or completely powers itself down.
    Type: Application
    Filed: April 22, 2003
    Publication date: April 7, 2005
    Inventor: Rick Choy
  • Automatic safety shut-off switch for exercise equipment
    Patent number: 6575878
    Abstract: The present invention relates to a safety off switch for a treadmill exercise device. If the treadmill exercise device running belt is still rotating even after user has left the treadmill exercise device, then after a programmed time duration, the treadmill exercise device automatically turns off the running belt and powers itself down. Foot impacts by the user on the running belt create back electromotive forces at the motor which drives the running belt. The foot impacts by the user change the current requirements of the motor by creating pulses in the normally steady current requirements. In one embodiment, the detection of the changes in the number of pulses over a given time interval indicates when the user has left the treadmill exercise device. In another embodiment, signal processing of the changes in the current requirements of the motor with respect to time results in a representation which if below a certain threshold would indicate that the user is no longer using the treadmill exercise device.
    Type: Grant
    Filed: November 19, 1999
    Date of Patent: June 10, 2003
    Assignee: Unisen, Inc.
    Inventor: Rick Choy