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Robert James Zimmerman

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  • Shawnee Mission, MO, US
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Patents Grantslast 30 patents

  • Information Patent Grant

    Variable eccentric vibratory hammer
    • Patent number 5,988,297
    • Issue date Nov 23, 1999
    • Hydraulic Power Systems, Inc.
    • Robert J. Zimmerman
    • B06 - GENERATING OR TRANSMITTING MECHANICAL VIBRATIONS IN GENERAL

Patents Applicationslast 30 patents

  • Information Patent Application

    Hydraulic Hammer
    • Publication number 20170030043
    • Publication date Feb 2, 2017
    • Global Piling Solutions, L.L.C.
    • Robert James Zimmerman
    • E02 - HYDRAULIC ENGINEERING FOUNDATIONS SOIL SHIFTING
  • Information Patent Application

    Vibratory Hammer with Passive Lubrication System for Bearings
    • Publication number 20150090469
    • Publication date Apr 2, 2015
    • HYDRAULIC POWER SYSTEMS, INC.
    • Robert James Zimmerman
    • B25 - HAND TOOLS PORTABLE POWER-DRIVEN TOOLS MANIPULATORS
  • Information Patent Application

    Hydraulic Hammer
    • Publication number 20130199813
    • Publication date Aug 8, 2013
    • Global Piling Solutions, L.L.C.
    • Robert James Zimmerman
    • E02 - HYDRAULIC ENGINEERING FOUNDATIONS SOIL SHIFTING