Famous Patents
Felix Hoffmann, a German chemist, was searching for something to relieve his father's arthritis. In doing so, he "rediscovered" acetylsalicylic acid and in 1900, patented a stable process for developing it. Hence, we have aspirin.
PatentStorm News
Make the Most of Our Site
See this month's Top Inventors and Most Cited Patents.
Stay on top of the latest innovations by subscribing to an RSS feed.
Registered users: Manage your profile.
| Number | Title | Issue Date |
| 8157064 | Shock absorber for drawer Disclosed is a shock absorber for a drawer. The shock absorber includes a body filled with fluid, a piston member inserted into the body while being coupled with a rod, and a buffering member installed in the body to prevent the body from being broken by receiving p... | 04/17/2012 |
| 8123006 | Lightweight gas spring design with volume compensator incorporated into a suspension fork for two wheeled vehicles A lightweight gas spring with a volume compensator, which is incorporated into a fork leg of a two-wheel vehicle fork. The fork leg includes a housing having an upper inner telescoping hollow rod with a closed top and bottom end which is partially inserted into a lo... | 02/28/2012 |
| 7309063 | Gas-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 |
| 7299907 | Hydraulic shock absorber and method A hydraulic shock absorber has an outer body with a central bore. A first piston is telescopingly received in the central bore adjacent a closed end thereof, and has a generally annular shape with an inner surface defining a central piston bore, and an outer surface... | 11/27/2007 |
| 7097015 | Suspension system for motor vehicles A suspension system for motor vehicles includes a piston-cylinder assembly having a working cylinder, a piston rod guidably inserted in a piston rod guide in the cylinder, and a damping piston having damping valves movably arranged in the working cylinder and connec... | 08/29/2006 |
| 7011192 | Air cylinder with high frequency shock absorber and accelerator High frequency shock absorber/accelerator built in at any or both end of conventional air cylinder that includes piston moving axially inside cylinder body and sealed against inner surface of body by sealing structure. Cylinder piston rod protrudes outside thru cyli... | 03/14/2006 |
| 6971493 | Front fork This invention provides a front fork that can be efficiently be filled with oil when it is manufactured. To achieve this object, the front fork comprising: an outer tube (1); an inner tube (2) inserted expansibly and contractibly into the outer tube ( | 12/06/2005 |
| 6966412 | Position-sensitive shock absorber A position-sensitive shock absorbing device with a single cast body construction is provided. The device has a tubular member, a moveable piston within the tubular member, a first hydraulic fluid chamber defined by an interior volume of the tubular member, a bypass ... | 11/22/2005 |
| 6957807 | Damping device The invention concerns a damping device for damping the kinetic energy of movable cabinet components, which has a first damping element with a first cylinder that has a first piston, which slides lengthwise in it, and at least one more (second) damping element with ... | 10/25/2005 |
| 6951267 | Damping force-variable shock absorber A damping force-variable shock absorber comprises a cylinder and a piston rod inside the cylinder. The piston rod is linearly moveable relative to the cylinder. An orifice valve plate having a plurality of valve holes is configured and mounted so as to form a circle... | 10/04/2005 |
| 6945372 | High frequency shock absorber and accelerator A powerful high frequency shock absorber/accelerator uses compressed air but maintains a substantially uniform level of force throughout retraction and extension strokes. A piston moving in an inner chamber compresses gas in the chamber. Initially, an aperture allow... | 09/20/2005 |
| 6899206 | Air cylinder with high frequency shock absorber and accelerator High frequency shock absorber/accelerator built in at any or both end of conventional air cylinder that includes piston moving axially inside cylinder body and sealed against inner surface of body by sealing structure. Cylinder piston rod protrudes outside thru cyli... | 05/31/2005 |
| 6739609 | Front fork The production of sharp shocks is prevented by increasing resilient gas characteristics in response to the compression stroke acting on a front fork. The front fork comprises a tube 1 connected to the vehicle body and a tube 2 connected to the vehicle ... | 05/25/2004 |
| 6698559 | Hydraulic damping device A hydraulic damping device has a cylinder, a rod, a piston, a first biasing member, a seal and a second biasing member. The rod moveably extends into the cylinder. The piston is securely attached to the rod to divide the cylinder into two chambers. The pi... | 03/02/2004 |
| 6648310 | Shock absorber Shock absorber, having a cylinder in which a piston rod is arranged as a displacer and which has a piston which subdivides a working space filled with damping medium into two working chambers. Arranged concentrically with this cylinder is an outer tube wh... | 11/18/2003 |
| 6634250 | Steering column damper A steering column damper for a power-driven vehicle comprises a jacket tube with a central longitudinal axis; a sliding tube displaceably guided in the jacket tube; a steering shaft, which is mounted for pivotability about the central longitudinal axis re... | 10/21/2003 |
| 6615960 | Fluid damped shock absorber and method A fluid damped shock absorber comprises an outer tube having a closed end and an open end, and a damper tube disposed within the outer tube. An inner tube is axially slideable within the outer tube and has a closed end and an open end. A sealing piston is... | 09/09/2003 |
| 6612410 | High frequency shock absorber and accelerator A powerful high frequency shock absorber/accelerator uses compressed air but maintains a substantially uniform level of force throughout retraction and extension strokes. A piston moving in an inner chamber compresses gas in the chamber. Initially, an ape... | 09/02/2003 |
| 6588555 | Piston-cylinder unit with at least one bypass groove in the cylinder A piston-cylinder unit including a cylinder in which a piston is guided so as to be displaceable axially, wherein the piston separates the cylinder into two work spaces which communicate via at least one bypass groove in the cylinder depending on the stro... | 07/08/2003 |
| 6557674 | Hydraulic or hydropneumatic shock absorber or telescopic suspension, equipped with built-in compensator, having small overall dimensions, easy to carry out and highly reliable The compensator consists of at least one flexible and preferably elastic braiding (8), fitted up outside onto the cylinder (1) of the shock absorber, seal-fastened with its own ends onto said cylinder by means of suitable fastening means (19, 10) and carr... | 05/06/2003 |
| 6481546 | Magneto-rheological damping valve using laminated construction A magneto-rheological damping device comprises a core element capable of acting as a magnetic circuit which carries a magnetic flux, and a case element surrounding a portion of the core element. A passage exists between the case element and core element, ... | 11/19/2002 |
| 6454061 | High frequency shock absorber and accelerator A powerful high frequency shock absorber/accelerator uses compressed air but maintains a substantially uniform level of force throughout retraction and extension strokes. A piston moving in an inner chamber compresses gas in the chamber. Initially, an ape... | 09/24/2002 |
| 6446944 | Suspension strut A suspension strut having a piston tube containing a floating piston, slidable within a cylinder tube. A collar is fixed to the inner surface of the cylinder tube and contains a tapered wear ring. As the strut expands by extending the piston tube relative... | 09/10/2002 |
| 6443271 | Shock absorber with cup-shaped stop cap A shock absorber includes a housing, a piston slidable in the housing, a piston rod extending outwardly from the piston, a cup-shaped stop cap secured to the free end of the piston rod, and an adjusting ring which protrudes from the end of the housing and... | 09/03/2002 |
| 6443272 | Vibration damper with adjustable damping force A vibration damper with adjustable damping force, having a cylinder in which a piston is guided with a piston rod so as to be axially movable. The piston divides the cylinder into a first and a second work space. At least one damping valve is arranged in ... | 09/03/2002 |
| 6431332 | Gas spring incorporating a safety member The invention relates to a compressible-fluid device such as a gas spring, including a compression chamber (3) and a piston (4) that is movable in said chamber. It includes a safety member (21) disposed so as to be struck by the piston (4) in the event of... | 08/13/2002 |
| 6425467 | Actuation arrangement for movable components on vehicles An actuation arrangement for movable components on vehicles, particularly for trunk lids or hoods, doors, vehicle tops and top covers, including at least one hydraulic cylinder (1) pivotably coupled to a cylindrical pivot pin (11) on the vehicle and/or on... | 07/30/2002 |
| 5522486 | Damping valve for shock absorber A shock absorber comprising an outer tube; an inner tube positioned inside the outer tube; a rod guide closing one end of the inner tube and the outer tube; a compensation valve assembly closing the other end of the inner tube; the other end of the outer ... | 06/04/1996 |
| 5503258 | Hydraulic shock absorber A hydraulic shock absorber having discrete damping levels in the rebound direction includes a piston that reciprocates within a pressure tube and divides the pressure tube into rebound and pressure chambers. A passage extends through the piston for establ... | 04/02/1996 |
| 5069317 | Pneumatic shock absorber A pneumatic shock absorber has a piston rod extending out of its cylinder whose pressure space adjacent to the piston is connected via an inlet check valve. An outlet valve to let off compressed air during damping motion of the piston has a valve piston r... | 12/03/1991 |
| 5052528 | Steering knuckle damper A limited stroke hydraulic actuator which may be located in the structure of a steered axle in a shallow blind bore. The piston which may be slidably received in the bore is displaced by an adjustable protrusion secured to the steering system. Displacemen... | 10/01/1991 |
| 4963078 | Stress and torque reducing tool and method A stress and torque reducing tool particularly useful in production of petroleum fluids from oil wells employing a reciprocating pump located within the well bore in the reservoir which is operated by means of sucker rods attached to a surface walking bea... | 10/16/1990 |
| 4937913 | Door closer A door closer wherein a housing defines a fluid-containing space and rotatably supports a shaft which is articulately connected with a pivotable door panel. A piston in the housing divides the space into a chamber and a compartment and has a toothed rack ... | 07/03/1990 |
| 4838392 | Semi-active damper for vehicles and the like The damper assembly has improved valve means that includes at least one annular movable valve member of the voice-coil type. Such valve member is formed at least in part of composite material that increases the strength and stiffness of the member, while ... | 06/13/1989 |
| 4819770 | Hydraulic control device A hydraulic device is provided for controlling the rate of relative movement of first and second members between predetermined first and second stations. The device includes a housing connected to the first member and provided with a first cavity for hydr... | 04/11/1989 |
| 4700815 | Vehicle suspension system A suspension damper has a piston 20 slidable in a cylinder 10 containing fluid. A compressible gas space 45 is provided in one end of the cylinder. To permit piston movement valve controlled passages 54 provide differential resistance in opposite directio... | 10/20/1987 |
| 4700611 | Pneumatic cylinder motor with end-of-travel cushioning mechanism A cushioning mechanism in a pneumatic cylinder utilizing a supplied air pressure, and a method of cushioning a piston in the pneumatic cylinder. Cushioning chambers are provided at opposite ends of a cylinder body of the pneumatic cylinder. Respective dif... | 10/20/1987 |
| 4693454 | Air pressure shock absorber An air pressure shock absorber for smoothly stopping a moving object reciprocated by a rod in an air pressure cylinder. The shock absorber absorbs and reduces the internal pressure of a chamber in the cylinder to smoothly stop the moving object by the com... | 09/15/1987 |
| 4500075 | Air pressure shock absorber An air pressure shock absorber for smoothly stopping a moving object reciprocated by a rod in an air pressure cylinder. The shock absorber absorbs and reduces the internal pressure of a chamber in the cylinder to smoothly stop the moving object by the com... | 02/19/1985 |
| 4106412 | Fluid truck bolster snubber A piston and cylinder motion dampening device having spiral groove metering, an orificed two-way pressure relief valve or a screw-on spring or an over-extension limiting seal retainer. A push-together method of assembling a piston and cylinder motion dampening... | 08/15/1978 |
