Physik Instrumente (PI) GmbH & Co., KG Patent applications |
Patent application number | Title | Published |
20140239771 | PIEZOELECTRIC ROTARY DRIVE FOR A SHAFT - A piezoelectric rotary drive for a shaft, is disclosed which can include a piezoelectric actuator and a coupling portion for driving the shaft as a stick-slip drive. To transmit greater contact forces between the frame and the shaft, at least one piezoelectric actuator and an adjustable and/or deformable frame with at least one coupling portion can be coupled to the shaft in a force-locked manner so as to accomplish a stick-slip drive, wherein the frame translates a piezoelectric deformation of the actuator mechanically such that the coupling portion rotates about the axis of the shaft over at least a part of the circumference of the shaft. | 08-28-2014 |
20140198381 | METHOD AND ARRANGEMENT FOR OPERATING A DYNAMIC NANO FOCUSING SYSTEM - The invention relates to a method and to an arrangement for operating a dynamic nano focusing system for use thereof in the field of microscopy, interferometry or similar applications, wherein the nano focusing system comprises a lever-transmission piezo actuator and a frictionless guide based on a resiliently deformable solid body joint which is connected to a mounting unit, in particular for a lens, in order to implement the desired adjustment paths for the focusing. According to the invention, in order to increase the dynamics during the focusing process, a secondary fine adjustment movement is superimposed on the primary adjustment movement, said secondary fine adjustment movement having a smaller adjustment path but higher frequency than the primary adjustment movement, wherein, when the fine adjustment is carried out, a determination is made as to whether the focusing result changes, in order to specify according thereto the amount and/or the direction of the primary adjustment movement. | 07-17-2014 |
20140175946 | Ultrasonic Actuator for a Linear Ultrasonic Motor and Linear Ultrasonic Motor Having an Ultrasonic Actuator - Ultrasonic actuator ( | 06-26-2014 |
20140077627 | HIGH-RESOLUTION POSITIONING DEVICE - The invention relates to a high-resolution positioning device having a stator and a rotor, a coil array, arranged on the stator, having at least three groups of flat coils, wherein each group has at least two single coils and the coil array encloses a free space on the stator, also having permanent magnetically-excited circuits that are situated on, against or in the rotor and form a magnet array which likewise encloses a free space, wherein the free spaces accommodate a position measuring system which has a measuring head having sensors, and an area scale. According to the invention, the device is in the form of a freely suspended, magnetically controlled six-dimensional drive, wherein the measuring head is situated in the coil array free space and the area scale is situated in the magnet array free space, and the rotor is free of drive-related electrical or electronic and, in this regard, live parts. | 03-20-2014 |
20140001922 | ULTRASONIC MOTOR | 01-02-2014 |
20130307440 | METHOD AND DEVICE FOR ELECTRICALLY EXCITING AN ACTUATOR FOR AN ULTRASONIC MOTOR - The invention relates to a method for electrically exciting a piezoelectric actuator of an ultrasonic motor having a mechanical resonance frequency F | 11-21-2013 |
20120319531 | ACTUATOR - An actuator, which can include piezoelectric material, is provided in the form of a single-layer or multi-layer flat plate. At least one layer has two electrodes spaced from each other by means of a separating area and arranged opposite each other both on the upper face of the at least one layer and on the lower face of the at least one layer. The electrodes of the upper face are arranged at an offset from the electrodes of the lower face. A motor is also provided to include the actuator and a movable element to be driven by means of the actuator. | 12-20-2012 |
20120228994 | ACTUATOR - An exemplary actuator in the form of a plate is disclosed, which includes, at least two generators for exciting an acoustic standing wave in the actuator. The actuator can have at least two main surfaces and a plane of symmetry S running perpendicularly to the main surfaces, with respect to which the generators are arranged symmetrically. A first lateral surface area can have a length L that substantially corresponds to the wavelength of the acoustic standing wave excited in the actuator. A second lateral surface area of the actuator can have a length (B) that is greater than the wavelength of the acoustic standing wave excited in the actuator, and that is not equal to a multiple of half the wavelength of the excited acoustic standing wave. | 09-13-2012 |
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 |