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Tenneco Automotive Inc. Patents
Assignee:
Tenneco Automotive Inc.
Address:
Lake Forest, IL
No. of patents:
40
Patents:












Patent Number Title Of Patent Date Issued
6581905 Brake bleed tool June 24, 2003
A brake bleed tool includes a pliable plastic tube which sealingly engages a bleed fitting. A bleed wrench coaxially slides along the tool to engage the bleed fitting. The bleed wrench includes a socket end for engaging the bleed fitting at one end and a winged end at the opposite end wh
6581733 Acceleration sensitive damping for automotive dampers June 24, 2003
A shock absorber having a pair of valve assemblies which include an acceleration sensitive valve which couples the working chamber of the shock absorber to the shock absorber's reservoir chamber through a fluid path to provide a soft damping characteristic for the shock when the shock
6464048 Solenoid actuated continuously variable shock absorber October 15, 2002
A shock absorber includes a pressure tube with a piston slidably disposed therein. A separate valve includes a fluid circuit for fluid low in rebound and a fluid circuit for fluid flow in compression. Each fluid circuit includes a variable orifice which allows selection between a firm
6460664 Independently tunable variable bleed orifice October 8, 2002
A shock absorber includes a valve assembly with a low speed valving system and a high speed valving system. Both systems control fluid flow through the respective valve assembly for fluid flow in the same direction. The low speed valving system is independently tunable in order to provid
6443436 Air spring assembly on shock absorber with combined seal September 3, 2002
A strut includes a shock absorber and an air spring. The air spring is positioned around and concentric with the shock absorber. A sealing system is employed which seals the pressurized air chamber of the air spring. The sealing system utilizes an elastomeric seal located between the air
6382373 Frequency dependant damper May 7, 2002
A gas shock absorber has a pressure tube which defines a working chamber. A piston divides the working chamber into an upper working chamber and a lower working chamber. A series of extension passages extend through the piston and are opened and closed by an extension valve assembly. A s
6382372 Ported disc variable bleed orifice May 7, 2002
A shock absorber includes a valve assembly with a low speed oil flow circuit and a mid/high speed oil flow circuit. Both circuits control fluid flow through the valve assembly in the same direction. The low speed oil flow circuit is tunable in order to provide low speed damping to improv
6364075 Frequency dependent damper April 2, 2002
A gas shock absorber has a pressure tube which defines a working chamber. A piston divides the working chamber into an upper working chamber and a lower working chamber. A series of extension passages extend through the piston and are opened and closed by an extension valve assembly. A f
6352145 Stroke dependent damping March 5, 2002
A two-stage shock absorber has a pressure tube within which a valve assembly is slidably disposed. A piston rod is attached to the valve assembly and extends out of the pressure tube. A ring is slidably disposed within the pressure tube and engages the valve assembly. After a specified
6340081 Shock absorber having ported plate low speed tunability January 22, 2002
A single absorber includes a valve assembly with a low speed valving system and a high speed valving system. Both systems control fluid flow through the respective valve assembly for fluid flow in the same direction. The low speed valving system is independently tunable in order to provi
6325187 Dirt wiper system for suspension damper December 4, 2001
A shock absorber has a pressure tube, a reserve tube, a piston rod and a rod guide. The rod guide is located between the pressure tube, the reserve tube and the piston rod. A sealing system is located between the rod guide and the piston rod. The sealing system is held in place by the re
6321888 Damper with externally mounted semi-active system November 27, 2001
An automatic damper for an automobile automatic damper system which provides a compression valve operable to vary compressive damping characteristics of a damper, as well as a rebound valve operable to vary rebound damping characteristics of the damper. Use of the invention in cooper
6290035 Acceleration sensitive damping for automotive dampers September 18, 2001
A shock absorber has a base valve assembly which includes a compression valve assembly and an acceleration valve assembly. The compression valve assembly controls a fluid path through the base assembly to provide a firm damping characteristic for the shock absorber during low acceleratio
6267197 Axle shaft spacer member July 31, 2001
An axle shaft spacer member for use with a suspension lift kit. The spacer member enables the wheel spindle of a vehicle to be moved laterally a desired distance, which in turn enables the upper control arms associated with the wheel spindle to be lowered when such would not otherwise be
6220409 Stroke dependent bypass April 24, 2001
A shock absorber has a pressure tube with a piston assembly slidably disposed within the pressure tube and attached to a piston rod. The piston assembly divides the pressure tube into an upper working chamber and a lower working chamber. The piston assembly includes a compression and a
6220406 Passive anti-roll system April 24, 2001
A passive damping for a shock absorber is disclosed. The shock absorber includes a working chamber, and a piston disposed in the working chamber. The piston includes a primary bypass valve for defining an upper fluid portion and a lower fluid portion. A piston rod is connected to the pis
6161843 Adaptive anti-roll device December 19, 2000
A vehicle suspension apparatus operating between the sprung and unsprung masses of a vehicle includes a pendular anti-roll bar connected to the vehicle and a pair of links which connect the bar to the wheels. The anti-roll bar includes a pair of selectively activated anti-roll bar re
6158546 Straight through muffler with conically-ended output passage December 12, 2000
The present invention provides a muffler which has an outlet tube with a funnel shaped element having a large diameter end positioned in an expansion chamber and conically tapering to a junction with a cylindrical neck element extending into an inlet end of an outlet tube. An inlet tube
6148969 Frequency dependant damper November 21, 2000
A gas shock absorber has a pressure tube which defines a working chamber. A piston divides the working chamber into an upper working chamber and a lower working chamber. A series of extension passages extend through the piston and are always left open. A series of compression passages ex
6109641 First-in/first-out tractor and semi-trailer cargo transfer system August 29, 2000
A truck design and load/unload configuration includes a tractor and an enclosed semi-trailer. The enclosed semi-trailer includes front and rear full size cargo doors or openings. The cargo loaded into the semi-trailer first is assured to be the cargo that is unloaded from the semi-traile
6102170 Passive anti-roll system August 15, 2000
A passive damping system for a shock absorber is disclosed. The shock absorber includes a working chamber, and a piston disposed in the working chamber. The piston includes a primary bypass valve for defining an upper fluid portion and a lower fluid portion. A piston rod is connected to
6085876 Flexing disc-blow off assembly for use in a shock absorber July 11, 2000
A shock absorber utilizes a single flexing disc assembly includes a flexing disc which is capable of performing the flexing disc function normally required for allowing the passage of fluid between the two sides of a shock absorber while also providing the blow off function. The flexing
6072880 Modular active silencer with port dish June 6, 2000
A modular Active Noise Control exhaust silencing system is provided including a housing defining an acoustic enclosure having an acoustic outlet port. A speaker is disposed within the acoustic enclosure and an amplifier is disposed within the housing and connected to the speaker. A m
6005957 Loudspeaker pressure plate December 21, 1999
An apparatus for mounting a loudspeaker within an enclosure is disclosed. The apparatus includes a loudspeaker mounting plate formed within the enclosure, and a mounting boss formed within the enclosure which is separated from the loudspeaker mounting plate by a fixed distance. The l
5992585 Acceleration sensitive damping for automotive dampers November 30, 1999
A shock absorber has a base valve assembly which includes a compression valve assembly and an acceleration valve assembly. The compression valve assembly controls a fluid path through the base assembly to provide a firm damping characteristic for the shock absorber during low acceleratio
5967268 Temperature responsive damper October 19, 1999
A shock absorber demonstrating temperature conscious damping includes an auxiliary valve for passing damping fluid between the compression side and the rebound side. The auxiliary valve opens at lower temperatures and closes at higher temperatures. The valve includes an axial channel for
5947498 Modular telescopic front fork assembly September 7, 1999
A modular telescopic front fork assembly which is adaptable to a wide range of applications is disclosed. The modular telescopic front fork assembly is utilized for a front of a vehicle having at least one front wheel. The modular telescopic front fork assembly includes a removable self-
5934422 Step motor actuated continuously variable shock absorber August 10, 1999
A shock absorber includes the typical fluid valving in the piston and in the base valve assembly which is designed to provide a firm damping characteristic for the shock absorber. A stepper valve assembly includes a bypass fluid passage between the upper working chamber and the reserve
5924528 Load depending damping assembly July 20, 1999
A shock absorber having variable damping characteristics for damping the movement of the body of an automobile is disclosed. The shock absorber includes a variable flow control valve which modulates the rate of fluid flow between the upper portion of the shock absorber working chamber an
5911290 Step motor actuated continuous variable shock absorber June 15, 1999
An adjustable damping shock absorber includes a pressure tube with a piston valve assembly slidably disposed within it. The piston valve assembly includes a compression valve assembly which is biased to a closed position and an extension valve assembly which is also biased to a closed po
5893436 One piece aluminum pressure tube with rod guide for shock absorbers April 13, 1999
A shock absorber includes an integral pressure tube and rod guide. The integration of these two components manufactured from aluminum allows the use of an aluminum pressure tube to eliminate axial differential thermal expansion between the pressure tube and an aluminum reserve tube. The
5855258 Anti-swish mechanism for a damper January 5, 1999
An anti-swish mechanism for a damper is disclosed to reduce the swish noise heard during movement of a piston assembly within the damper. The damper includes a pressure cylinder which forms a working chamber having a first portion and a second portion operable to store damping fluid. A p
5848168 Active noise conditioning system December 8, 1998
An active noise conditioning system for use with a combustion engine exhaust system is provided. A controller receives an exhaust noise signal, along with various other feedback signals for producing an anti-noise signal in response to the input signals. An amplifier is provided for
5839552 Method and apparatus for delivering fluid and or electric signals November 24, 1998
A telescopic cylinder (10) is disposed between the sprung (22) and unsprung (14, 18) portions of an automotive vehicle and is in fluid communication with a source of fluid external to the telescopic cylinder (10). The telescopic cylinder (10) includes the housing (46) which is operable t
5829773 Modular telescopic front fork assembly November 3, 1998
A modular telescopic front fork assembly which is adaptable to a wide range of applications is disclosed. The modular telescopic front fork assembly is utilized for a front of a vehicle having at least one front wheel. The modular telescopic front fork assembly includes a removable self-
5823306 Stroke dependent damping October 20, 1998
A two-stage shock absorber having a pressure tube within which a valve assembly is slidably disposed. A piston rod is attached to the valve assembly and extends out of the pressure tube. In a first embodiment, a ring which is slidably disposed within the pressure tube engages the valve
5813500 Anti-swish mechanism for a damper September 29, 1998
An anti-swish mechanism for a damper is disclosed to reduce the swish noise heard during movement of a piston assembly within the damper. The damper includes a pressure cylinder which forms a working chamber having a first portion and a second portion operable to store damping fluid. A p
5785344 Active roll control July 28, 1998
An active roll control and leveling system operating between the sprung and unsprung masses of a vehicle or the like includes a plurality of shock absorbers attached between the sprung mass and the unsprung mass, a hydraulic source for supplying fluid at two hydraulic pressures, a sensor
5783782 Multi-chamber muffler with selective sound absorbent material placement July 21, 1998
The present invention provides an acoustic muffler for attenuating sound waves of the exhaust gas of an internal combustion engine including a shell, a plurality of walls closing both ends of the shell and dividing an interior of the shell into a plurality of chambers. The plurality of
5769190 Continuous controlled restriction valve for a shock absorber June 23, 1998
A shock absorber utilizes an array of restrictive rebound fluid flow passages radially formed in a piston assembly. The flow passages are defined by a relatively narrow entrance and a relatively wide exit. A contoured wall form one wall of the passage. The restrictive rebound fluid f

 
 
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