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1. EP1983214 - FLUID DAMPER

Office
European Patent Office
Application Number 07706326
Application Date 09.02.2007
Publication Number 1983214
Publication Date 22.10.2008
Publication Kind A4
IPC
F16F 9/53
FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
16ENGINEERING ELEMENTS OR UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
FSPRINGS; SHOCK-ABSORBERS; MEANS FOR DAMPING VIBRATION
9Springs, vibration-dampers, shock-absorbers, or similarly-constructed movement-dampers using a fluid or the equivalent as damping medium
32Details
53Means for adjusting damping characteristics by varying fluid viscosity, e.g. electromagnetically
F16F 9/20
FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
16ENGINEERING ELEMENTS OR UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
FSPRINGS; SHOCK-ABSORBERS; MEANS FOR DAMPING VIBRATION
9Springs, vibration-dampers, shock-absorbers, or similarly-constructed movement-dampers using a fluid or the equivalent as damping medium
10using liquid only; using a fluid of which the nature is immaterial
14Devices with one or more members, e.g. pistons, vanes, moving to and fro in chambers and using throttling effect
16involving only straight-line movement of the effective parts
18with a closed cylinder and a piston separating two or more working spaces therein
20with the piston-rod extending through both ends of the cylinder
CPC
F16F 9/535
FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
16ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
FSPRINGS; SHOCK-ABSORBERS; MEANS FOR DAMPING VIBRATION
9Springs, vibration-dampers, shock-absorbers, or similarly-constructed movement-dampers using a fluid or the equivalent as damping medium
32Details
53Means for adjusting damping characteristics by varying fluid viscosity, e.g. electromagnetically
535Magnetorheological [MR] fluid dampers
Applicants CENTRAL RES INST ELECT
Inventors MURAKAMI TAKAHIRO
ARASEKI HIDEO
Designated States
Priority Data 2006032724 09.02.2006 JP
2006099661 31.03.2006 JP
2006100220 31.03.2006 JP
Title
(DE) FLUIDDÄMPFER
(EN) FLUID DAMPER
(FR) AMORTISSEUR À FLUIDE
Abstract
(EN)
In a fluid damper that autonomously changes a damping force in accordance with movement of a piston, the fluid damper having: a fluid 8 having magnetic properties; a piston 2 formed of a magnetic material; a cylinder 3 that encapsulates the fluid 8 having magnetic properties and accommodates the piston 2; a piston rod 4 that pierces the cylinder 3 to support the piston 2; a magnetic field generation device 6 provided outside the cylinder 3; a first yoke 5 arranged around the cylinder 3; and a second yoke 7 arranged around the piston rod 4 outside the cylinder 3, a magnetic circuit is partially formed.

(FR)
L'invention concerne un amortisseur à fluide qui est capable de fonctionner tout en modifiant automatiquement la force d'amortissement en fonction du mouvement d'un piston sans qu'il ait besoin d'installer un capteur pour détecter le déplacement du piston et une unité de commande pour commander l'alimentation en énergie électrique. L'amortisseur à fluide, dans lequel la force d'amortissement se modifie automatiquement en fonction du mouvement du piston, comprend un fluide (8) ayant des propriétés magnétiques, un piston (2) fait d'une matière magnétique, un cylindre (3) enfermant hermétiquement le fluide (8) ayant des propriétés magnétiques et contenant le piston (2), une tige (4) de piston enfilée dans le cylindre (3) et soutenant le piston (2), un dispositif (6) de création d'un champ magnétique installé à l'extérieur du cylindre (3), un premier élément de culasse (5) disposé autour du cylindre (3) et un second élément de culasse (7) disposé autour de la tige (4) de piston et à l'extérieur du cylindre (3). De ce fait on peut former en partie un circuit magnétique.