Patent · US Active

Vibrator tube

US8018105B2 · kind B2 · utility

29Cited by

6References

17Claims

0Family size

Assignee

Sony Ericsson Mobile Communications AB · SE

Inventors

Mats Erixon · Bjärred, SE
Mats Wolf · Södra Sandby, SE
Stefan Hellstrom · Stenungsund, SE

Key dates

Filing date	Mar 15, 2006
Grant date	Sep 13, 2011
Priority date	—
Expiry date	Nov 4, 2026

Classification

Technology area (CPC H)Electricity
CPC primaryH02K33/16
WIPO fieldElectrical machinery, apparatus, energy
WIPO sectorElectrical engineering

Abstract

An electromagnetic vibrator for use in a portable communication device includes a housing including a track directed in a first dimension; a coiling including at least one coil turn, oriented in a second dimension essentially perpendicular to the first dimension, coiled around the track and being arranged to receive an electric voltage; a permanent magnet assembly arranged for motion along the track to which the permanent magnet assembly is tightly fitted; and a ferrofluid mixture placed between the track and the permanent magnet assembly allowing motion of the permanent magnet assembly in the first dimension in dependence of the electric voltage as supplied to the coiling.

Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.