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1. US20090050425 - Fluid damper

Office
United States of America
Application Number 12162862
Application Date 09.02.2007
Publication Number 20090050425
Publication Date 26.02.2009
Grant Number 08016087
Grant Date 13.09.2011
Publication Kind B2
IPC
F16F 15/03
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
15Suppression of vibrations in systems; Means or arrangements for avoiding or reducing out-of-balance forces, e.g. due to motion
02Suppression of vibrations of non-rotating, e.g. reciprocating, systems; Suppression of vibrations of rotating systems by use of members not moving with the rotating system
03using electromagnetic means
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
Applicants Central Research Institute of Electrical Power Industry
Inventors Murakami Takahiro
Araseki Hideo
Agents Notaro, Michalos & Zaccaria P.C.
Priority Data 2006-032724 09.02.2006 JP
2006099661 31.03.2006 JP
2006100220 31.03.2006 JP
Title
(EN) Fluid damper
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.