Prosthetic Arm Force Reducer Team 1 – Halliday's ... - Ohio University

e used with a harness. The website claims that the Grip Prehensors are the highest efficiency of
any body powered prosthetic device available. Applications range from peeling a banana and
slicing a tomato to using a wrench or hammer, weightlifting, or shooting a bow. The range of
gripping force can exceed 100 pounds. The models are stainless steel with titanium side plates
and polyurethane gripping surfaces as options. A few applications along with material choices
appear in Fig. 4.1.4 below.
Fig. 4.1.4 – TRS Adult Grip Prehensors and Sample Applications
Liberating Technologies, Inc. markets a device known as the RSL Steeper MultiControl Plus
prosthetic hand system. These hands can close in as little as 0.9 seconds and come in a variety of
sizes. The RSL Steeper MultiControl Plus Hand has a new power management system called
PowerForce. This electronic circuit provides additional grip force on demand and acts like an
electric automatic transmission. An image of this product can be seen below in Fig. 4.1.5.
Fig. 4.1.5 – Liberating Technologies, Inc. RSL Steeper MultiControl Plus
Motion Control Inc. provides an electronic prosthetic arm for above elbow amputations. Known
as the Utah Arm, motion control released the third version in 2004. In this particular version,
microprocessors were incorporated into the arm to allow wearers to make fine-tune adjustments
to the movement of the arm. This particular arm provides proportional control which allows the
wearer to move the arm and hand slowly or quickly in any position. The Utah Arm 3 can be
found below in Fig. 4.1.6.
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