A finger model with joints, being connected to each other and corresponding to a respective finger, having tendon-like cords for their movements is so designed that natural finger movements are possible, whereby the model is of particularly simple and clear design. The finger model can be used as finger endoprosthesis or as a demonstration object for the explanation of finger movements and of injuries of the finger movement mechanism.
A mechanical hand comprising a housing with a first sliding actuation member and second sliding actuation member, at least two elongate, bendable members comprising a proximal phalanx and a distal phalanx, a relatively stationary member attached to the housing, a primary tension member projecting through the housing and at least through the second sliding actuation member, and a set of primary tendons and a set of secondary tendons. The primary tendons have first and second ends, with the primary tendon first end secured to the first slidable actuation member, and with the primary tendons extending through the bendable members. The primary tendon second end is secured to the distal phalanx. Each secondary tendon has first and second ends. The secondary tendon first end is secured to the second slidable actuation member. The secondary tendons extend through the bendable members. The secondary tendon second end is secured to the proximal phalanx. A method for having the mechanical hand of this invention exhibit a conformable grasp is also disclosed.
A skeletal system comprising at least two bones and soft tissue. The soft tissue comprises a body and at least two protrusions. Each of the at least two protrusions have an end. At least one of the ends is attached to a first bone and at least one of the ends is attached to a second bone. The soft tissue further comprises a core having a first elasticity and a cladding having a second elasticity. The first elasticity is substantially less than the second elasticity, such that the core substantially limits the elongation of the cladding.
A device for use in training in the treatment of finger or toe nails, comprises an artificial digit (2) having a nail (4) removably mounted thereon. The nail may be attached by a screw (18), a ratchet arrangement, or by embedding it in a resilient layer on the surface of the digit.
An artificial hand assembly for use in training manicurists has a base upon which the hand is mounted at an upwardly extending angle thereto. The hand has removable fingertips having artificial nails therein. In one embodiment the hand is movable with respect to the base about one axis. In another embodiment of the invention, the hand is movable with respect to the base about two axes normal to each other. In still another embodiment the hand is movable with respect to the base in any desired direction or orientation without regard to any discrete axis, by means of a ball and socket connection to the base.
Joints for joining together limb members of mannequins and forms, and methods of assembly of joints and mannequins are provided. The joints and mannequins of this invention provide natural anatomical shape and ease of assembly. This is accomplished using one or more assembly fixtures, located within or on a limb member to be joined, that contain elements of a locking mechanism to hold the limbs together and other elements for creating tension or friction between joined limb members. The assembly fixtures also comprise a disc (or tab) that provides a natural appearance to the joint and allows for ease of assembly.
