Browsing by Author "Kargov, Artem"

Now showing 1 - 2 of 2
  • Thumbnail Image
    ItemOpen Access
    DESIGN AND PRELIMINARY EXPERIENCE WITH FLUIDHAND MK III
    (2008) Schulz, Stefan; Pylatiuk, Christian; Kargov, Artem; Werner, Tino; Gaiser, Immanuel; Reischl, Markus; Oberle, Reinhold
    The third generation of the fluidic hand currently is in the process of clinical trial. The new hand combines functionality and cosmesis. It has the natural shape of a human hand and multiple new functions. The grasping operation is built in an adaptive way according to the biological example. This means that objects are enclosed with positive locking. The big contact area and soft passive elements considerably reduce the grasping force required to hold an object securely. Starting from a natural basic hand position, all actuators can be controlled individually by two myoelectrodes in the socket. The software allows for a quick selection of the most important grasping patterns. Besides the multifunctional control, features of the new hand like the force feedback system which gives the patient a sense of feeling and operation of a (computer) keyboard with the index will be depicted.
  • Thumbnail Image
    ItemOpen Access
    PRELIMINARY EXPERIENCE WITH HYDRAULICALLY DRIVEN HAND PROSTHESES
    (2005) Pylatiuk, Christian; Kargov, Artem; Oberle, Reinhold; Klosek, Heinrich; Schulz, Stefan
    The need for further development of prosthetic hands with enhanced functionalities and better cosmetic appearance than conventional prosthetic hands became evident in many investigations of this topic [1-3]. Consequently, a new generation of multi-articulated hands for prosthetic application were designed in the past decade. Some of these hands are characterized by a multitude of miniature DC gear motors integrated into the hand [4-8], or by an underactuated mechanism driven by a single DC motor [4,9]. However, the transition from an experimental hand to a clinically viable hand is a crucial test for any new development. Different approaches using fluidic actuators were chosen by [10] and by our research group [11]. Unlike [10], we do not use a pneumatic drive system powered by pressurized CO2 from disposable cartridges, but a compact electro-hydraulic system. Its components are micropump(s), microvalve(s), a reservoir, a controller, and small flexible fluidic actuators integrated into the finger joints. The flexible fluidic actuators expand during inflation, generating the flexion movement of the digits, whereas the extension movement is achieved by elastic elements [11]. Publications on standards for prosthetic hands and criteria to meet user requirements [1-3, 12] were analyzed and taken into consideration in designing new experimental hands. The results obtained in the first year with three hydraulically driven experimental hands are displayed and test experiences are presented.