Patents by Inventor Fred Brail

Fred Brail 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).

  • Bi-directional motor drive system
    Patent number: 3959699
    Abstract: Two electric motors are coupled to each other and to a device which is to be bi-directionally actuated. An associated electrical control circuit comprises switches and delay timers, for energizing the first motor to drive the device in one direction and concurrently drive the second unenergized motor, and then to energize the second motor to drive the device in another direction and concurrently drive the first unenergized motor.
    Type: Grant
    Filed: November 25, 1974
    Date of Patent: May 25, 1976
    Inventor: Fred Brail