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US 2002/0078779 A1Published application
Positioning device
AssigneeLeichti Engineering AG
InventorsAndreas Scheidegger, Ralph Liechti
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AssigneeLeichti Engineering AG
InventorsAndreas Scheidegger, Ralph Liechti
Estimating the term…
Conventional positioning devices in which a body is displaceable in a plane and rotatable by means of three drives have the drawback that at least one of the drives is displaced together with the body, whereby these apparatus are relatively heavy and sluggish. In the case of the positioning device according to the invention, three straight guide elements, arranged radially, are rigidly connected to the body. Each guide element is accepted in a linear bearing in a longitudinally displaceable way, and each linear bearing is disposed on a separate rotor in a way pivotable about a pivot axis directed perpendicular to the plane. Through independent displacement of the linear bearings on a common circular path, the body can be shifted and rotated as desired in a region. This construction has the advantage that it is built simply and that it is able to execute quick and precise positioning movements in particular owing to small masses in motion.
A positioning device in which a body is displaceable and rotatable by means of three drives in a plane, wherein three elongated, non-parallel guide elements are rigidly connected to the body, each guide element is received in a translational bearing in a longitudinally displaceable way, each translational bearing is pivotable about a pivot axis directed perpendicular to the plane, each pivot axis is disposed on a rotor spaced apart from its rotational axis and parallel to this rotational axis, and the three rotors are disposed axis-parallel and are rotatable by means of the drives.
Dependencies are inferred from the claim text.