The Utah Arm 3

Since 1981, the Utah Arm has been the premier myoelectric arm for above elbow amputees. It was originally developed at the University of Utah by the Center for Engineering Design, led by Dr. Steve Jacobsen. In 1987, Motion Control released the Utah Arm 2, with entirely re-engineered electronics that made the Utah Arm the most durable and dependable myoelectric arm avaialable.

The Utah Arm 3 - One Step Closer to Nature
In 2004, Motion Control introduced microprocessor technology into the Utah Arm 3 (U3), with a Computer Interface that allows the prosthetist or wearer to fine-tune the adjustments to achieve maximum performance. A variety of inputs may be used, so more options are available to more wearers. Meanwhile, the U3 still delivers the same sensitive, proportional control of elbow, hand and wrist (optional), letting the wearer move the arm and hand slowly or quickly in any position.This provides a more natural response with less effort than the traditional on/off movement.

WHAT’S NEW ABOUT THE U3?
Simultaneous Elbow and Hand control! Because the Utah Arm 3 has two microprocessors, two functions can be controlled at once (optionally), thus producing a more natural movement.
More Input Options

EMG Preamps using disc or snap-type electrodes
Motion Control Linear Potentiometer
Motion Control Force Sensor
Otto Bock Linear Transducer

NEW Touch Pad design!

Allows convenient placement wherever a "push" input is available
Protects the sensitive transducer from water, sweat and sharp edges
Compatible with U3, ProControl and ProHand controllers.

Easy to Use Computer Interface- For adjustments by the prosthetist
The Set-Up Wizard guides you through the process of setting up your system step-by-step. Once set up, users can readjust by routing directly to the adjustment screens.

The wearer's input signals are shown in real time on the Computer Interface,
so adjustments can be made quickly for immediate testing and training.
Download free demo software

Maximum Function
The Utah Arm 3’s mobility and fine tuning allow any patient to achieve maximum function, including transhumeral, forequarter amputees and shoulder disarticulation. Many arm wearers master function quickly, after training with a qualified Therapist.

New Quiet Lock Option
Optionally the "click" of the lock pin is eliminated with this new component. Can be retrofitted to earlier Utah Arm 2 or 3.

Technique for using snap-on electrodes with roll-on gel liners. Instructions

The Utah Arm 3 Technical Specifications:
Excursion Range: 135o
Excursion Time With Myoelectric Hand TD: 1.20 seconds
Active Lift: 1 kilogram (2.2 lbs.) in the Terminal Device and using a fully charged Battery
Load Limit: 22.7 kg (50 lbs.), w/ elbow locked at 90o flexion
15.9 kg (35 lbs.), when forearm extension installed
Humeral Rotation: Unlimited
Wrist Rotation: Quick-Disconnect Wrist: 360o in each direction
Weight: Without Hand: 913 grams (2 lbs.)
Hand Weight: 450 gm (1lb.), plus glove
Heat Tolerances: Operating Temperatures: 0o to 44oC (32o to 110oF)
Storage Temperatures: -18o to 60o C (0o to 140o F)
Current: Maximum: 4.0 Amps Quiescent: 10 mA
Battery Specifications: (5 Battery Packs supplied) Rechargeable NiMH, (1100 mA Hours capacity)
Voltage: Dual Supply, ± 6 Volts D.C. (total 12 V.)
Charge Time: 2.5 Hours, maximum
Forearm Length: (from rearmost point of the forearm to the end of the wrist)
Standard: 27.3 cm (10.75 in.)
w/Extension: 32.4 cm (12.75 in.)
Minimum: 24.8 cm (9.75 in.)