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

Feature
Hosmer Model 7
Work Hook
Otto Bock Vector
Hook 10A60
Touch Bionics: i-
LIMB System
TRS Adult Grip
Prehensors
RSL Steeper
MultiControl
Plus
MAGNUM
Parallel Grippers
Vector Hook &
Vector Grip
Adjustable No Yes Uncertain Yes No Uncertain Yes
Electronics No No Yes No Yes Yes No
Power Source Body Powered Body Powered Batteries Body Powered Batteries Batteries Body Powered
Cost ~$350 ~$400 +$1000 ~$400 ~$600 ~$300 ~$400
Serviceability Yes Yes No Yes No Uncertain Yes
Corrosion
Resistant
Reduces Input
Force
Table 4.1.1 – Terminal Device Product Benchmarking
Yes Yes Yes/No Yes No Yes Yes
No Yes Yes Yes/No Yes Yes Yes
Table 4.1.2 – Prosthetic Arm Product Benchmarking
Feature Utah Arm 3
CPS Body-
Powered
Prosthetic
Adjustable Yes Yes/No
Electronics Yes No
Power Source Batteries Body Powered
Cost N/a ~$5,000
Serviceability No Yes
Corrosion
Resistant
Reduces Input
Force
Yes Yes
Yes No
Through benchmarking, it has been determined that there is a diverse market of terminal devices
as well as compatible substitutes. Further up the arm, the user has fewer options to choose from.
In order to aid in concept generation and the overall project’s scope one must consider the
customer’s needs as seen in section 2.0.
The Hosmer Hook is a tried and true classic terminal device made specifically for agricultural
purposes. It does not require any electrical components, it is affordable, serviceable, and is
corrosion resistant. One of its major drawbacks is that there is no force adjustability and it would
require modifications in order to use springs as the resistive force rather than its standard rubber
bands. The Otto Bock Vector Hook 10A60 shares the same strengths as the Hosmer model but
the user can adjust the force and therefore reduce to input needed to open the hooks. Also,
springs come standard on the Vector Hook model.
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