Chapter 2. Prehension

Appendix D - Prosthetic and Robotic Hands 413
Table D.4 Commercially available non-standard devices. As bodypowered
devices with one degree of freedom, they can be opened or
closed voluntary. They consist of two gripping surfaces, each work
as a virtual finger. Together, they can act as a VF3 (from Iberall,
Beattie, & Bekey, in press; reprinted by permission).
Manufacturer and Control Opp _ _ VF1 VF2 VF3
Name
Hosmer Dorrance
CAPP I voluntary pad lower upper
opening jaw jaw
CAPP I1 voluntary pd lower upper
opening jaw jaw
Otto Bock, Inc.
System Elec. Greifer myoelectric pxI left right
control jaw jaw
Therapeutic Recreation
Grip Series voluntary pd lower upper
closing jaw jaw
ADEPT Series voluntary pd lower upper
closing jaw jaw
upper jaw
upper jaw
left and
right jaw
upper jaw
upper jaw
The UCLA Children's Amputee Prosthetic Program (CAPP)
(Hosmer Dorrance Corporation) has produced functional non-hand,
non-hook terminal devices that are not mechanical in appearance.
CAPP I is for children up to ten years of age, while the CAPP 11 is for
teenage and adult amputees. The CAPP II was designed to provide a
general purpose device for unilateral amputees that performs functions
usually carried out by the non-dominant hand (Shapeman &
Setoguchi, 1989). CAPP 11 was designed to provide a secure grip on
objects, ease of operation, a pleasing appearance, and reliable service
for general purpose applications. Its wide palmar surface covered by a
resilient Urethane cover allows a secure grasp on an object. An
alternative to a hook and a hand, it is body-powered by a voluntary
opening mechanism. The secure grip is provided by the combined
action of a closing spring, a full frictional, resilient cover, and an