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Class Information
Number: 188/316
Name: Brakes > Internal-resistance motion retarder > Having a thrust member with a variable volume chamber (e.g., coaxial or telescoping tubes, compensating reservoir) > Fluid through or around piston within chamber
Description: Reciprocating piston with fluid flow between chamber compartments wherein fluid moves from one section to another section via (a) an opening in said member extending from one face thereof to an opposite face thereof, or (b) a passageway that exists because said member does not fill the area bounded by the container in which the member moves.










Sub-classes under this class:

Class Number Class Name Patents
188/317 Via fixed or variable orifice in piston 204


Patents under this class:
1 2

Patent Number Title Of Patent Date Issued
8657084 Rotary damper Feb. 25, 2014
8584817 Shock absorber Nov. 19, 2013
8573605 Active suspension system and hydraulic ram therefor Nov. 5, 2013
8499907 Piezoelectric liquid inertia vibration eliminator Aug. 6, 2013
8498784 Method for estimating the suspension stroke of a vehicle and apparatus implementing the same Jul. 30, 2013
8474582 Cushion device and motorcycle Jul. 2, 2013
8453810 Damper device Jun. 4, 2013
8448952 Vehicle with active-regenerative suspension May. 28, 2013
8448760 Progressively dampened hydraulic buffer system May. 28, 2013
8439173 Methods and apparatus for a suspension system with progressive resistance May. 14, 2013
8376100 Regenerative shock absorber Feb. 19, 2013
8342301 Shock absorber Jan. 1, 2013
8196723 Pneumatic damper Jun. 12, 2012
8181756 Shock absorber May. 22, 2012
8167101 Damping force generating mechanism for shock absorber May. 1, 2012
7980368 Damping force variable shock absorber Jul. 19, 2011
7963377 Dual stage dampers for vehicles suspensions Jun. 21, 2011
7878311 Piston with an integral electrically operated adjustment valve for a hydraulic vibration damper Feb. 1, 2011
7828307 Stabilizer arrangement for a motor vehicle with adjustable rocker pendulum Nov. 9, 2010
7810618 Vibration generator Oct. 12, 2010
7766137 Nonreturn valve for a shock absorber Aug. 3, 2010
7699148 Damping valve assembly with a progressive damping force characteristic Apr. 20, 2010
7661663 Vibration damper having a buffer spring Feb. 16, 2010
7628258 Steering damper Dec. 8, 2009
7600617 Industrial shock absorber for use in a conveyor system Oct. 13, 2009
7441639 Dashpot with amplitude-dependent shock absorption Oct. 28, 2008
7431135 Stroke dependent damping Oct. 7, 2008
7395907 Shock absorber with frequency-dependent damping Jul. 8, 2008
7357232 Front fork in two-wheeled motor vehicle or the like Apr. 15, 2008
7337885 Telescoping cylinder Mar. 4, 2008
7299908 Shock absorber Nov. 27, 2007
7191877 Fluid flow regulation of a vehicle shock absorber/damper Mar. 20, 2007
7134534 Damper for front fork of vehicle Nov. 14, 2006
6938365 Dampening apparatus Sep. 6, 2005
6926500 Fluid inertia drag damper for rotary wing aircraft rotor Aug. 9, 2005
6892865 Monotube shock absorber remote reservoir fluid connection May. 17, 2005
6776269 Twin piston shock absorber Aug. 17, 2004
6659242 Hydraulic shock absorber for vehicle Dec. 9, 2003
6607185 Suspension fork having reserved arch Aug. 19, 2003
6561326 Amplitude-attenuating dashpot May. 13, 2003
6491145 Regulable dashpot for motor vehicles, and method of adjusting such a dashpot Dec. 10, 2002
6340153 Shock and acoustic mount Jan. 22, 2002
6260832 Shock absorber with adjustable compression and rebound Jul. 17, 2001
6244398 Shock absorber with variable bypass damping Jun. 12, 2001
6213261 Hydropneumatic spring Apr. 10, 2001
6164424 Shock absorber with bypass damping Dec. 26, 2000
6119831 Controllable vibration damper for motor vehicles Sep. 19, 2000
6026939 Shock absorber with stanchion mounted bypass damping Feb. 22, 2000
5913391 Damper Jun. 22, 1999
5730261 Damper control valve Mar. 24, 1998

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