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Class 267/64.17 - Self-pumping


Subclass of Class 267 - Spring devices
Definition: A device wherein the means to maintain the spring"s
No. of patents: 84
Last issue date: 04/03/2012


1      
NumberTitleIssue Date
8146897Self-pumping hydropneumatic spring strut with internal level control
Self-pumping hydropneumatic spring strut includes a working cylinder divided into first and second working spaces by a working piston carried on a hollow piston rod; a high pressure chamber and a low pressure chamber partially filled with hydraulic damping medium, t...
04/03/2012
8091870Self-pumping hydropneumatic spring strut
A self-pumping hydropneumatic spring strut is provided to have internal level control. The spring strut has an outer tube having one end sealed by a piston rod guide, a working cylinder received inside the outer tube, and a hollow piston rod extending into the worki...
01/10/2012
8074974Vehicle height adjusting device
A vehicle height adjusting device includes a cylinder (1), a rod (3) inserted in the cylinder (1), a piston (4) connected to the rod (3) and movable within the cylinder (1), and defining a rod side chamber (2a)...
12/13/2011
8052128Self-pumping hydropneumatic spring strut
A self-pumping hydropneumatic spring strut with internal leveling control, particularly for motor vehicles, has an outer tube having an oil-filled high-pressure work space in the work cylinder, which high-pressure work space is under pressure by at least one gas cus...
11/08/2011
8042791Self-pumping hydropneumatic shock absorber
Self-pumping hydropneumatic shock absorber with internal level control, with an oil-filled working cylinder under the pressure of gas cushions and with a damping piston, which is attached to the end of a hollow piston rod and can slide back and forth in the working ...
10/25/2011
7806390Spring system, in particular for bicycles
A spring system in particular for bicycles includes a gas suspension spring with adjustable progression and a housing element for movably receiving the suspension piston of the gas suspension spring. The gas suspension spring includes a spring volume including a fir...
10/05/2010
7422199Self-pumping hydropneumatic suspension strut unit
Self-pumping hydropneumatic suspension strut unit with internal level control, with an oil-filled working cylinder subject to the pressure of gas cushions and with a damping piston, which is free to slide inside the cylinder and is mounted at the end of a hollow pis...
09/09/2008
7370849Self-pumping hydropneumatic spring strut unit
A self-pumping hydropneumatic spring strut unit includes a working cylinder filled with oil under pressure and a piston and rod unit displaceable in the cylinder so as to define two working spaces in the cylinder, and high-pressure and low pressure chambers surround...
05/13/2008
7364142Spring strut unit for suspension systems of motor vehicles
Spring strut unit for suspension systems of motor vehicles with a fastening connection on the body side and another fastening connection on the wheel side; with a helical spring supported between the body and the wheel; and with a vibration damper installed between ...
04/29/2008
7350793Vehicle suspension roll control system
A roll control system for a vehicle including: two double-acting rams (1, 2) at the first end of the vehicle and two single acting rams (3, 4) at the second of the vehicle; each double-acting ram (1, 2) including a first and a second fluid chamb...
04/01/2008
7344127Self-pumping hydropneumatic spring strut with internal level control
The self-pumping hydropneumatic spring strut with an internal level control includes a cylinder having a high-pressure chamber and a low-pressure chamber, both chambers being at least partially filled with oil, the high-pressure chamber further comprising a gas cush...
03/18/2008
7309063Gas-filled spring for a vehicle, such as a motor cycle, and valve for such a gas-filled spring
A gas-filled spring (1) operates using gas (13, 14) and may be intended for a motor cycle. The gas-filled spring comprises a cylinder (2) and a piston (4), said cylinder comprising a compression chamber and a return chamber (8, 9)....
12/18/2007
7303198Trolley wheel assembly
A trolley includes a front wheel assemblie (12) and a rear wheel assembly both assemblies mounted on a trolley frame. The front wheel assembly (12) includes a fixed wheel assembly (24) to aid control of the trolley. In one form the front wheel a...
12/04/2007
7270321Fluid-elastomeric damper assembly including internal pumping mechanism
A fluid-elastomeric damper assembly operable for damping relative motion between a first structure and a second structure including a housing structure grounded to the first structure and a plurality of elastomer seals coupled to the housing structure, the housing s...
09/18/2007
7252181Air pressure proportional damper
A suspension system includes an air spring and a shock absorber disposed between the sprung and unsprung portions of a vehicle. A vehicle height sensor sends signals to a control system which adjusts the height of the vehicle by increasing or decreasing the air pres...
08/07/2007
7204478Height control valve with universal mounting for a suspension system
A height control valve for use in a vehicle suspension system for controlling the ride height of the trailer, the height control valve provided with a universal mounting for allowing greater flexibility in the mounting of the height control valve to a vehicle frame,...
04/17/2007
7192033Trailing arm suspension and height control system with motorized valve therefor
A trailing arm suspension for a vehicle. The trailing arm suspension having a height control system for controlling the ride height of the suspension relative to the vehicle. The height control system preferably comprises a motor driven height control valve. ...
03/20/2007
7178794Fluid isolator assembly and floating elastomeric damping element
An isolator apparatus is described to attenuate or isolate vibration. The isolator apparatus includes a fluid isolator assembly including a flexible diaphragm and a pressure chamber having a flow passage opened to the pressure chamber to provide a fluid spring. A fl...
02/20/2007
7156382Dual airbag airspring
An air spring assembly includes a primary airbag mounted to a piston air bag such that the piston airbag provides a rolling surface for the primary airbag. A change in the piston airbag pressure changes the effective rate of the primary air spring. A relatively smal...
01/02/2007
7137624Fluid-elastomeric damper assembly including internal pumping mechanism
A fluid-elastomeric damper assembly operable for damping relative motion between a first structure and a second structure including a housing structure grounded to the first structure and a plurality of elastomer seals coupled to the housing structure, the housing s...
11/21/2006
7118099Selfpumping hydropneumatic spring strut with internal level control
in particular for a motor vehicle, includes a high pressure chamber containing a gas cushion acting as a spring, and a working cylinder which is filled with damping medium under pressure of the gas cushion. A working piston carried by a hollow piston rod divides the...
10/10/2006
7089777High speed pneumatic accelerator
A pneumatic testing apparatus is provided for accelerating a mass. The apparatus has a housing defining a reservoir and a cylinder having an opened proximate end and a closed distal end. The opened proximate end is positioned within the reservoir and a piston is pos...
08/15/2006
7083163Booster with spring to adapt air spring pressure for load dependent shock absorber
A suspension system for a vehicle includes a frequency dependent damper (FDD) or shock absorber defining a first pressurized working chamber and an air spring assembly defining a second pressurized working chamber. A booster enables pressure communication between th...
08/01/2006
7070028Frequency dependent damper
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 flow path extends through the piston to provide fluid communication between the upper and lowe...
07/04/2006
7036802Self-pumping hydropneumatic suspension strut
A suspension strut includes an outer tube having a first filling opening and a second filling opening, an intermediate wall received in the outer tube and separating a high pressure chamber from a low pressure chamber, a working cylinder located concentrically insid...
05/02/2006
7028996Vehicle suspension system and height control valve therefor
A height control valve for controlling the relative height between a vehicle frame and a trailing arm suspension. The height control valve comprises a housing defining an interior chamber and having an inlet port fluidly connecting to a source of pressurized air. An...
04/18/2006
7025367Adjustable air cushion bicycle seat
An adjustable air cushion bicycle seat hydraulic ram system mounted within the seat post of a bicycle with one end of the ram attached to the bicycle seat, and the other end of the ram in communication with an internal reservoir associated with an adjustable pressur...
04/11/2006
7021434Self-pumping hydropneumatic suspension strut
Self-pumping hydropneumatic suspension strut with internal height control, in particular for motor vehicles with a work cylinder which is filled with oil and is under pressure by at least one gas cushion which is arranged in a high-pressure chamber and which acts as...
04/04/2006
7011608Pneumatic pogo stick
A pneumatic pogo stick is comprised of an elongate cylindrical housing which forms a cylinder. The housing is formed from a clear polycarbonate plastic. A top cap is attached to one end of the housing to form the top of an air chamber. A plastic piston, slidable wit...
03/14/2006
7011301Wheel-guiding forward axle air spring strut
A wheel-guiding forward axle spring strut includes a spring and a shock absorber (6) integrated axially therein. The spring includes two end members (8, 10) and a spring element is disposed between these end members. The shock absorber (6) inclu...
03/14/2006
6910682Pneumatic-spring wheel-suspension leg
A pneumatic-spring wheel-suspension leg for motor vehicles. The leg comprises a bellows (1) that can be rolled up over a jacket (3) and accommodates a pneumatics chamber (9), a hydraulic dashpot inside the bellows or jacket, and a piston rod (
06/28/2005
6893033Integrated air spring and strut
A strut for a vehicle suspension includes a hydraulic cylinder housing defining a hydraulic fluid chamber. The hydraulic cylinder includes an air passage adjacent to the chamber and separated therefrom by a first common wall. An air spring is supported on an upper p...
05/17/2005
6871845Self-pumping, hydropneumatic suspension strut unit
A self-pumping, hydropneumatic suspension strut unit with an internal level control for a vehicle includes a low pressure chamber and a high pressure chamber for storing a damping medium under pressure. The high pressure chamber includes a gas cushion for displacing...
03/29/2005
6863163Self leveling vehicle suspension damper
A suspension damper comprises a cylinder tube and a control partition. The cylinder tube is disposed within a reservoir tube to define a fluid reservoir, and has at least one first hole. The control partition is disposed in the fluid reservoir, and communicates with...
03/08/2005
6758466Fluid-elastomeric damper assembly including internal pumping mechanism
A fluid-elastomeric damper assembly operable for damping relative motion between a first structure and a second structure including a housing structure grounded to the first structure and a plurality of elastomer seals coupled to the housing structure, the housing s...
07/06/2004
6648309Self-pumping hydropneumatic suspension strut with internal ride-height control
Self-pumping hydropneumatic suspension strut with internal ride-height control, particularly for motor vehicles, with an outer tube with an oil-filled high-pressure work space under the pressure of at least one gas cushion acting as spring in a high-press...
11/18/2003
6648308Spring apparatus
The invention relates to a vehicle spring apparatus comprising housing having fluid sealed therein. The housing comprises a cylinder with a slidably fitted piston and a piston rod connected at one end to said piston. The piston rod extends at the other en...
11/18/2003
6619634Self-chargeable pneumatic cylinder
A self-chargeable pneumatic cylinder comprises a cylinder body, a working piston disposed inside the cylinder body, and a hollow elongate shaft coupled to the working piston and extending outward from the cylinder body. The hollow interior of the shaft co...
09/16/2003
6547224Pneumatic self leveling suspension damper
A suspension damper includes a reservoir housing with a piston slidably mounted therein and including a piston rod extending from the reservoir housing and attached to the vehicle by a mount assembly. An air chamber is defined by a sleeve cirucmscribing t...
04/15/2003
6494441Self-pumping hydropneumatic spring strut with internal leveling
A self-pumping hydropneumatic spring strut with internal leveling for motor vehicles includes a working cylinder filled with damping medium. The working cylinder is under the pressure of at least one gas cushion arranged in a high-pressure chamber and act...
12/17/2002
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