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On the Safety of Infeeding Commercial Tree Chippers

[+] Author Affiliations
Dennis B. Brickman

Triodyne, Inc., Niles, IL

Paper No. IMECE2003-42597, pp. 31-38; 8 pages
  • ASME 2003 International Mechanical Engineering Congress and Exposition
  • Engineering/Technology Management: Safety Engineering and Risk Analysis, Technology and Society, Engineering Business Management, and Homeland Security
  • Washington, DC, USA, November 15–21, 2003
  • Conference Sponsors: Engineering and Technology Management Group
  • ISBN: 0-7918-3728-9 | eISBN: 0-7918-4663-6, 0-7918-4664-4, 0-7918-4665-2
  • Copyright © 2003 by ASME


This paper addresses a commercial mobile tree chipper with a mechanical infeed system that is manually fed. OSHA records associated with commercial tree chipper accidents indicate tree workers have alleged that their arms have been pulled into the chipper feed wheels by branches during the feeding process. An infeed extension pan has been proposed to prevent a tree worker’s arm from being pulled into the chipper feed wheels if his gloved hand gets caught in the branches being fed into the chipper feed wheels if his gloved hand gets caught in the branches being fed into the infeed hopper. Experiments performed with human test subjects and an anthropomorphic dummy are presented under arm pull-in scenarios to study the safety implications of the proposed infeed extension pan.

Copyright © 2003 by ASME



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