Patents by Inventor Esko A. O. Ahlman

Esko A. O. Ahlman 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).

  • Hydraulic striking machine
    Patent number: 4553610
    Abstract: Improvement to a hydraulic striking machine including among other things a body part and a piston, moving to and fro in the body and being accelerated to strike against a tool. The air current produced is led out of the machine uniformly along the surface of the tool to clean the tool.
    Type: Grant
    Filed: March 13, 1984
    Date of Patent: November 19, 1985
    Assignee: Kone Oy
    Inventors: Raimo K. Pelto-Huikko, Esko A. O. Ahlman, Pertti V. Rautimo
  • Hydraulic percussion machine
    Patent number: 4380901
    Abstract: A hydraulic percussion machine, comprising a body carrying hydraulic passages and valves, and having a gas-filled, hydraulic pressure accumulator for storing the stroke energy which accelerates a piston to strike against a tool. The percussion machine has a separate hydraulic stroke standardizing circuit by action of which the piston stroke is independent of the liquid pressure in the high pressure line supplying the machine and of the volumetric flow.
    Type: Grant
    Filed: June 27, 1980
    Date of Patent: April 26, 1983
    Assignee: Kone Oy
    Inventors: Pertti V. Rautimo, Raimo Pelto-Huikko, Esko A. O. Ahlman