Semi-Passive Assistive Devices For The Upper Limbs

Tech ID: 24788 / UC Case 2015-106-0

Patent Status

Country Type Number Dated Case
United States Of America Published Application 20180036194 02/08/2018 2015-106

Brief Description

Assistive exoskeletons are designed to enable humans to perform tasks otherwise beyond their capacities. One area of particular interest is the upper limb. Existing devices for upper limb assistance are powered by active or passive methods. Active devices use motors, but require complicated controllers and consistent power to perform tasks. Passive devices do not require power, but often have fixed parameters meaning that they are not especially versatile. Moreover, the devices that currently exist tend to be bulky, costly, and inefficient.

To address those deficiencies, UC Berkeley researchers have developed a semi-passive assistive device for upper limbs. The Berkeley device is lightweight, reduces user fatigue, and increases load carrying capacity. The device is highly versatile, and is able to increase the mobility and functionality of a user’s arm.

Suggested uses

  • Assistance in industrial and rehabilitative settings
  • Increased independence for individuals with physical limitations
  • Disaster relief and first response teams


  • Semi-passive and extremely efficient
  • Low or no power consumption during long periods of usage
  • Lightweight and compact
  • Simple to take on and off
  • Reduced risk of atrophy

Related Materials


Learn About UC TechAlerts - Save Searches and receive new technology matches


  • Bajcsy, Ruzena

Other Information

Categorized As