Window raising device
AssigneeNanomotion Ltd.
InventorsJona Zumeris, Izhak Rafaeli
Life of this patent
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Abstract
An even plurality of piezoelectric motor units operating directly on an element to be vertically translated, such as a car window, is disclosed. Each pair of piezoelectric motor units are located along an horizontal line on opposing sides of the element. The piezoelectric motors are preferably, asynchronously operated. An activation system for providing alternating current (AC) voltage to each of the piezoelectric motor units and converting direct current voltage to a sinusoidal square wave, is also included.
Claims10
A window raising device for vertically raising or lowering a window, the window defining a vertical plane with at least one longitudinal axis thereacross and having two, thin side surfaces and two wide front surfaces, the device comprising:
- an even plurality of piezoelectric motor units operating directly on said window, wherein each piezoelectric motor unit comprises at least one piezoelectric motor comprised of a piezoelectric ceramic and a spacer and wherein at least two of said piezoelectric motor units operate against said window at opposing ends of said longitudinal axis;
- and a control unit for controlling the operation of said piezoelectric units.
Translation apparatus for vertically translating a vertically held element having two main surfaces and two side surfaces, the apparatus comprising:
- a. at least one pair of vertical motion piezoelectric motor units which operate directly on opposite ones of said two main surfaces for providing vertical motion to said vertically held element;
- b. at least one pair of horizontal motion piezoelectric motor units which operate directly on opposite ones of said two main surfaces for providing horizontal motion to said vertically held element;
- c. a controller for selecting between horizontal and vertical motion;
- d. a first activation unit connected between said vertical and horizontal motion piezoelectric motor units and said controller for receiving control signals from said controller and for activating the selected pair of piezoelectric motor units to push in the selected, horizontal or vertical, direction;
- and
- e. a second activation unit connected between said vertical and horizontal motion piezoelectric motor units and said controller for receiving control signals from said controller and for activating the non-selected pair of piezoelectric motor units to knock against said vertically-held element in order to reduce static friction between said motors and said vertically held element.
Dependencies are inferred from the claim text.