Patents Represented by Attorney Erie Y. Munson

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  • Device for efficient energy transfer and damping of impact drilling machines
    Patent number: 4993504
    Abstract: Device in impact machines. The device comprises a first chamber (5) which is connected to an accumlator (6) and the pressure of which is used to hold together a set of rods (2) forming part of the drill tool. Furthermore there is a second chamber (7) to damp the recoil from the set of rods.
    Type: Grant
    Filed: February 8, 1990
    Date of Patent: February 19, 1991
    Assignee: Atlas Copco MCT AB
    Inventors: Jorgen A. R. Rodert, Kurt H. Andersson