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Class Information
Number: 267/64.16
Name: Spring devices > Vehicle > Comprising compressible fluid > With retarder > Leveling device
Description: A device including means operable to maintain the spring"s effective "working range" constant regardless of various loading conditions, so the "mean riding height" of the vehicle can be maintained substantially constant.










Sub-classes under this class:

Class Number Class Name Patents
267/64.19 Having flexible wall 92
267/64.18 Having metering pin for varying spring rate 19
267/64.17 Self-pumping 90


Patents under this class:
1 2 3 4

Patent Number Title Of Patent Date Issued
8701846 Inverted strut comprising an air damper combined with a hydraulic stop Apr. 22, 2014
8596431 Pneumatic cylinder with a self-adjusting end position damping arrangement, and method for self-adjusting end position damping Dec. 3, 2013
8474582 Cushion device and motorcycle Jul. 2, 2013
8448761 Valve mechanism for a gas suspension system May. 28, 2013
8191904 Hybrid leveling system Jun. 5, 2012
8146897 Self-pumping hydropneumatic spring strut with internal level control Apr. 3, 2012
8087646 Hydropneumatic suspension with load-dependent damping control Jan. 3, 2012
7959165 Suspension system run height adjustment Jun. 14, 2011
7751959 Semi-active suspension system with anti-roll for a vehicle Jul. 6, 2010
7722017 System and method for determining appropriate conditions for leveling a vehicle having an air suspension system May. 25, 2010
7644943 Gas spring assembly Jan. 12, 2010
7635051 Suspension system for motor vehicles Dec. 22, 2009
7621537 Height control valve for vehicle axle/suspension system Nov. 24, 2009
7621538 Air spring assembly with localized signal processing, system and method utilizing same, as well as operating module therefor Nov. 24, 2009
7568713 Air-suspension system for vehicles, having a throttle Aug. 4, 2009
7520494 Spring element Apr. 21, 2009
7497422 Air spring and hanging label assembly and method of assembling same Mar. 3, 2009
7377501 Aerostatic suspension system for rolling equipment and vehicles May. 27, 2008
7344127 Self-pumping hydropneumatic spring strut with internal level control Mar. 18, 2008
7219779 Hydro-pneumatic suspension system May. 22, 2007
7192012 Air suspension system with supply air restriction valve Mar. 20, 2007
7131654 Vehicle suspension system Nov. 7, 2006
7077226 Controlled truck cab suspension system Jul. 18, 2006
7077227 Controlled truck cab suspension Jul. 18, 2006
7028996 Vehicle suspension system and height control valve therefor Apr. 18, 2006
7025184 Hydraulic shock absorber with self leveling function for vehicle height Apr. 11, 2006
7017893 Pull-type suspension Mar. 28, 2006
6948721 Variable leveling valve apparatus for a vehicle Sep. 27, 2005
6935625 Air suspension system with air shut off valve Aug. 30, 2005
6873897 Method and device for stabilizing a vehicle Mar. 29, 2005
6811171 Vehicle suspension system Nov. 2, 2004
6726189 Closed level control system for a vehicle Apr. 27, 2004
6695294 Controlled equilibrium device with displacement dependent spring rates and integral damping Feb. 24, 2004
6543754 Air spring Apr. 8, 2003
6513797 Damping arrangement for suspension system Feb. 4, 2003
6494441 Self-pumping hydropneumatic spring strut with internal leveling Dec. 17, 2002
6494442 Self pumping hydropneumatic spring strut with internal leveling Dec. 17, 2002
6491291 Suspension characteristic control using shape memory alloy materials Dec. 10, 2002
6474629 Suspension system for motor vehicles Nov. 5, 2002
6471196 Method for controlling the level of a vehicle body of a motor vehicle Oct. 29, 2002
6416061 Hydraulic suspension system Jul. 9, 2002
6412789 Semi-trailer suspension air spring control system Jul. 2, 2002
6296235 Automobile stabilization assembly Oct. 2, 2001
6237902 Shock absorber device for a vehicle wheel suspension May. 29, 2001
6224044 Level control system for a motor vehicle May. 1, 2001
6217010 Suspension and a dynamic load-compensating fluid spring therefor Apr. 17, 2001
6098967 Level control arrangement for vehicles having air springs Aug. 8, 2000
6089551 Height control valve with integral dump device Jul. 18, 2000
6044940 Remote-controlled hydropneumatic shock absorber Apr. 4, 2000
5871217 Levelling valve for automatically keeping constant the vehicle height of a commercial vehicle with air suspension Feb. 16, 1999

1 2 3 4










 
 
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