The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Jun. 07, 1988
Filed:
Sep. 30, 1986
James W Pittaway, Anaheim, CA (US);
James S Sweeney, Jr, Laguna Beach, CA (US);
Other;
Abstract
A motor-driven exercise apparatus is disclosed, which incorporates a plurality of runaway-preventing features, thus reducing the chance of injury to the user. A motor control circuit is effectively controlled by pulse width modulated commands from a CPU, and by frequency-variable feedback information. These data are converted to voltages and input to a differential amplifier. A relay switch is used to cause immediate power turn off at both speed and elevation motors if any of the following occurs: (a) loss of feedback signal from the speed feedback at the CPU, (b) too rapid speed change sensed by the CPU, (c) failure of the motor control circuit to receive a signal from the CPU within a certain period, or (d) an elevation motor runaway sensed by the CPU.