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Design of an Adjustable Compensation Mechanism for Use in a Passive Arm Support

[+] Author Affiliations
Pieter Lucieer, Just L. Herder

Delft University of Technology, Delft, The Netherlands

Paper No. DETC2005-85442, pp. 491-500; 10 pages
  • ASME 2005 International Design Engineering Technical Conferences and Computers and Information in Engineering Conference
  • Volume 7: 29th Mechanisms and Robotics Conference, Parts A and B
  • Long Beach, California, USA, September 24–28, 2005
  • Conference Sponsors: Design Engineering Division and Computers and Information in Engineering Division
  • ISBN: 0-7918-4744-6 | eISBN: 0-7918-3766-1
  • Copyright © 2005 by ASME


People with (neuro-)muscular diseases have problems lifting their arms against gravity because of degeneration of their muscles. Many of them are in need of a device that supports the weight of their arms, so as to regain some independence. Existing solutions do not meet all of the requirements. This paper presents the design of a new type of spring-compensation mechanism which is adjustable to varying load. The most important part of this design is a wrapping cam with variable transmission to compensate for errors, which rolls on a support plane to minimize friction.

Copyright © 2005 by ASME
Topics: Design , Mechanisms



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