COVVI Hand Overview
The COVVI team are highly experienced in the prosthetics field and have collaborated throughout development, to put into practice the lessons learned from preceding designs. The COVVI Hand is enabled by an innovative actuator design with market-leading power density and comes in three different sizes, all of which operate with next level grip force (70N) and speed (0.4s Tripod grip) capabilities.
It also has a three-way digit control system, in addition to a built-in E-Paper screen that can display notifications, troubleshooting issues and training information during set-up.
Device Overview
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Large Grip Area
Electric Quick Disconnect
Flexible Silicone Glove
Palm Grip Surface
Index Finger Is Touch Screen Compatible
E-Paper Screen
Wrist Lock Button (Flex Wrist)
Silicone Digit Covers
Dorsal Button
Technical Information
| COVVI Hand Size – Small | 17.15cm / 6.75 inches |
| COVVI Hand Weight – Small | 638g / 1.41 lbs* |
| COVVI Hand Size – Medium | 18.42cm / 7.25 inches |
| COVVI Hand Weight – Medium | 662g / 1.46 lbs* |
| COVVI Hand Size – Large | 19.69cm / 7.75 inches |
| COVVI Hand Weight – Large | 692g / 1.53 lbs* |
| COVVI Hand Voltage | 7V to 8.4V DC |
| Maximum Current Consumption | 5A (Max. Constant) / 7A (Max. peak, 50ms duration) |
*Device Weight can vary +/- 5 grams
| Maximum Hand Load Limit (A) with force applied upwards | 90kg / 198 lbs over the knuckles |
| Maximum Hand Load Limit (B) picking weight up | 30kg / 66 lbs across the fingers |
| Maximum Finger Load Limit | 16kg / 35 lbs |
| Maximum Opening Width (Tripod Grip | 120mm |
| Full Open to Full Close | 0.6 seconds to achieve grip |
| Tripod Grip | 0.4 seconds to achieve grip |
| Tripod Grip Force | 35N / 8 lbf |
| Power Grip Force | 90N / 20 lbf |
| Key Grip Force | 22N / 5 lbf |
Mechanical Structure
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Stainless Steel Finger Link
High Chromium Steel Wrist Plate
Cast Aluminium Digit Components
Machined Aluminium Wrist Housing
Stainless Steel Thumb Pivot
Stainless Steel Finger Chassis
ESD Pathway
E-Paper Screen
High Impact Polymer Chassis
Stainless Steel Finger Pivot
Stainless Steel Knuckle
Engineering Behind The Hand
Our hand size range is suitable for all adults and most adolescents. At COVVI, we started with the small COVVI Hand and built bigger. This ensured we did not compromise on any functionality across the size range where in the past engineers had always started big and tried to shrink their design down, which was challenging to do without losing some of the hand’s function.
We designed the COVVI Hand based on measured data collated from human hands to be more anatomically proportionate while also sporting improved aesthetics. The natural form factor of our device is complimented by top-of-the-range, premium materials to create the ultimate combination of form and function.
We are extremely proud of our compact design and cannot wait to see you bring it to life!
Please Note: This infographic should only be used as a guide. Please take measurements of hands from clinical data. TASKA is owned by 5TH ELEMENT LIMITED, Bebionic is owned by Otto Bock HealthCare GmbH, i-Limb is owned by Touch Bionics Limited
