| Physik Instrumente (PI) GmbH & Co., KG Patent applications |
| Patent application number | Title | Published |
|---|
| 20110050035 | ULTRASONIC MOTOR - The invention relates to an ultrasonic motor having a multilayer actuator in the form of a multilayer plate, having one or more friction elements or friction layers on its side surfaces and having an electrical exciter apparatus for the actuator. According to the invention, the multilayer plate has two intersecting, mirror-imaged asymmetrical generators for ultrasonic vibrations, to be precise in the form of layers of exciter electrodes and general electrodes which are alternately arranged with layers of piezoelectric ceramic, wherein a two-dimensional asymmetrical acoustic standing wave is generated in the multilayer actuator. | 03-03-2011 |
| 20100264856 | Operating method and driving means of a piezolinear drive - Operating method of a piezolinear drive having a group of piezo stack actuators which drive a rotor, in which the actuators constitute a multilayer ceramic arrangement situated on a common substrate, wherein a first stack part within the stack of the multilayer arrangement is formed as a longitudinal actuator, and a second stack part as a shearing actuator, and the latter being at least indirectly in clamping and shearing contact with the rotor, and at least two identical actuators being situated next to each other in order to perform alternate clamping and advancing movements in the step operation for a rough positioning operation in the step mode, wherein the adjacent actuators of the group are controlled to perform alternate clamping and advancing movements, with control signals being derived from a speed-proportional control variable. | 10-21-2010 |
| 20100085649 | Optical objective module - The invention relates to an objective module comprising an optical zoom lens group ( | 04-08-2010 |
| 20100072857 | Ultrasonic Linear Motor - The invention relates to an ultrasonic linear motor ( | 03-25-2010 |
| 20100013354 | ADJUSTING DEVICE WITH HIGH POSITION RESOLUTION, EVEN IN THE NANO-OR SUBNANOMETER RANGE - The invention relates to an adjusting device with high position resolution, even in the nano- or subnanometer range and a regulating distance of a few micrometers up to several hundred millimeters, wherein PZT-solid state actuators in a closed-loop control circuit are used for the main control direction, the positions thereof being determined by high resolution sensors and the PZT-solid state actuators are in connection with a platform ( | 01-21-2010 |
| 20080297001 | Miniaturizable Motor - The invention relates to a miniaturizable motor ( | 12-04-2008 |
