Window raising device

Details Window raising device Window raising device

Filed on

1995-07-20

Date issued

1997-06-17

Examiner

Dougherty, Thomas M.

Patent Class

Electrical generator or motor structure

SubClass

Non-dynamoelectric

SubSubClass

Piezoelectric elements and devices

Other Related Categories

310317, 310323, H02N 200

Type

Patent

Status

active

Patent number

056400632

Description

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.

REFERENCES:
patent: 4483571 (1984-11-01), Mishiro
patent: 4692649 (1987-09-01), Izukawa et al.
patent: 4742260 (1988-05-01), Shimizu et al.
patent: 4947077 (1990-08-01), Murata
patent: 5039899 (1991-08-01), Yamaguchi
patent: 5087851 (1992-02-01), Nakazawa et al.
patent: 5140215 (1992-08-01), Yamaguchi
patent: 5200665 (1993-04-01), Iijima
patent: 5216313 (1993-06-01), Ohnishi et al.
patent: 5237238 (1993-08-01), Berghaus et al.
patent: 5416375 (1995-05-01), Funakubo et al.
patent: 5453653 (1995-09-01), Zumeris

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