Patents by Inventor Marek Sokalski

Marek Sokalski 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).

  • Brake for a hoisting apparatus
    Patent number: 5709285
    Abstract: A brake for a hoisting apparatus including a hoisting line, a drum for the hoisting line, a hoisting motor and a brake system for braking of the hoisting cable, the brake system consisting of a hydraulic brake and a mechanical brake. The mechanical and the hydraulic brakes are connected to a common transmission which is driven by the drum when this rotates freely, and the mechanical and the hydraulic brakes are controlled by a common controller for controlling the distribution of braking power between the two brakes. The control system distributes the braking power automatically between the brake systems. The transmission can also be connected to an autodriller for controlling the weight on the bit.
    Type: Grant
    Filed: October 3, 1995
    Date of Patent: January 20, 1998
    Assignee: Maritime Hydraulics AS
    Inventors: Marek Sokalski, Erik Zachariassen