Patents by Inventor Kelly Drake

Kelly Drake 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).

  • Drum rotation indicator
    Patent number: 4809857
    Abstract: A drum rotation indicator for indicating the speed of raising and lowering a load by a crane winch. A rate generator connected to the winch develops electrical pulses having a frequency proportional to winch rotational speed. A solenoid having a movable plunger is mounted in the cab of a crane where the vibration of the plunger can be sensed by a crane operator. Pulses from the rate generator are amplified and coupled to the solenoid to cause the plunger to vibrate at a rate corresponding to pulse frequency.
    Type: Grant
    Filed: August 10, 1987
    Date of Patent: March 7, 1989
    Assignee: FMC Corporation
    Inventors: Roger A. Steuck, Paul T. Culler, Kelly Drake