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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:
Patents under this class:
| Patent Number |
Title Of Patent |
Date Issued |
| 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 |
| 7077227 |
Controlled truck cab suspension |
Jul. 18, 2006 |
| 7077226 |
Controlled truck cab suspension system |
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 |
| 5823517 |
Adjustable strut for motor vehicles |
Oct. 20, 1998 |
| 5803482 |
Shock absorber for automotive suspension |
Sep. 8, 1998 |
| 5785344 |
Active roll control |
Jul. 28, 1998 |
| 5769400 |
Height and inclination control of a wagon body |
Jun. 23, 1998 |
| 5730428 |
Leveling valve having a precision adjustment device |
Mar. 24, 1998 |
| 5707044 |
Device forming a hydraulic jack and usable in a hydropneumatic suspension for automotive vehicles |
Jan. 13, 1998 |
| 5651555 |
Fluid-operated leveling valve systems |
Jul. 29, 1997 |
| 5560591 |
Leveling valve for air springs |
Oct. 1, 1996 |
| 5527021 |
Two output vehicle suspension solenoid |
Jun. 18, 1996 |
| 5375819 |
Dual in-line height control valve assembly |
Dec. 27, 1994 |
| 5348112 |
Motorcycle height adjuster |
Sep. 20, 1994 |
| 5342023 |
Hydraulic control device for active suspension system |
Aug. 30, 1994 |
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