In 1608, Dutch eyeglass maker Hans Lipperhey filed the first patent for a working telescope. The patent was denied.
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| Number | Title | Issue Date |
| 7946399 | Hydraulic shock absorber Provided is a hydraulic shock absorber enabling an increase in a variable range of both damping forces produced in an extension stroke and a compression stroke thereof. A cylinder (1) filled with hydraulic oil is divided into first and second oil chambers ( | 05/24/2011 |
| 7886882 | Pneumatic spring damper unit Disclosed is a gas spring/damper unit (1) having at least one movably mounted displacement piston (2) and two displacement chambers (3, 4) whose volume increases or diminishes according to the direction of travel of the displacement piston (2... | 02/15/2011 |
| 7699147 | Regulated dashpot with shock-absorption force controls A regulable dashpot with shock-absorption force controls, especially intended for motor vehicles, with at least one flow-regulating system including one or more shock-absorption components for the compression phase and/or for the decompression phase. The object is t... | 04/20/2010 |
| 7255359 | Bicycle The invention relates to a bicycle adjusting device, in particular an adjusting device for adjusting the height of the front wheel suspension, the rear wheel suspension, the saddle or of the steering mechanism of a bicycle, e.g. of a mountain bike, a bicycle with at... | 08/14/2007 |
| 7255211 | Dashpot with amplitude-dependent shock absorption A dashpot featuring amplitude-dependent shock absorption, especially intended for the wheel of a vehicle and including a hydraulically parallel cylindrical pressure-compensation chamber (8). The pressure-compensation chamber is partitioned by an axially displ... | 08/14/2007 |
| 7182358 | Bicycle The invention relates to a bicycle adjusting device, in particular an adjusting device for adjusting the height of the front wheel suspension, the rear wheel suspension, the saddle or of the steering mechanism of a bicycle, e.g. of a mountain bike, a bicycle with at... | 02/27/2007 |
| 7172058 | Vibration damper with amplitude-dependent damping force Vibration damper with amplitude-dependent damping force includes a cylinder, in which a piston rod, carrying a piston, is guided with freedom of axial movement, where the piston divides the cylinder into a working space on the piston rod side and a working space on ... | 02/06/2007 |
| 7159699 | Adjustable shock absorber A shock absorber is provided and includes a first end adapted for connection to a vehicle, a second end adapted for connection to the vehicle, a case containing a piston rod and a piston valve and a compression adjustment device disposed exterior to the case, wherei... | 01/09/2007 |
| 7156214 | Vibration damper with amplitude-selective damping force Vibration damper includes a cylinder filled with a damping medium in which a piston rod with a piston is guided in an axially movable manner, wherein the piston divides the cylinder into a work space on the piston rod side and a work space remote of the piston rod. ... | 01/02/2007 |
| 7133033 | Actuator for a switch An actuator for a switch, the actuator being movable between on and off positions against an adjustable resilient bias to provide a first signal when said actuator is in said on position and a second signal when said actuator is in said off position. ... | 11/07/2006 |
| 7100750 | Assembly for a Hydraulic Dashpot An assembly for a hydraulic dashpot. The dashpot is accommodated in an overall housing (1) and provided with a shock-absorbing piston (3) traveling back and forth inside the housing on one end of a piston rod (2) and partitioning the housing int... | 09/05/2006 |
| 7066307 | Hydraulic dashpot for motor vehicles A hydraulic dashpot for motor vehicles, with a cylinder and a primary piston. The cylinder (1) is charged with shock-absorption fluid. The primary piston (2) is mounted on the lower end of a piston rod (8) and partitions the cylinder into two ch... | 06/27/2006 |
| 7017928 | Bicycle A bicycle in one embodiment includes a frame and at least one adjusting device for adjusting at least one of a height of a saddle and a steering stem. The adjusting device includes a double-acting piston/cylinder assembly with a first cylinder chamber and a second c... | 03/28/2006 |
| 7014179 | Adjustable cushion device A bicycle adjustable cushion device includes an outer tube with a connection cap connected to a first end thereof and an inner tube has a first end movably and rotatably inserted in a second end of the outer tube. A rod has a first end fixed to the connection cap an... | 03/21/2006 |
| 6964325 | Integrated tagging system for an electronic shock absorber An integrated tagging system for an electronically controlled shock absorber having a shock absorber with damping characteristics unique to the shock absorber. An electronic control module is in electronic communication with the shock absorber for controlling the sh... | 11/15/2005 |
| 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 |
| 6938365 | Dampening apparatus A dampening means for a tool, the dampening means controlling pivoting of the tool with respect to a support means of a support structure. ... | 09/06/2005 |
| 6860369 | Vibration damper with variable damping force A vibration damper with variable damping force, includes a cylinder filled with damping medium and in which a piston fastened to a piston rod axially moveably therein. The piston divides the working cylinder into two working spaces. The damping force for the directi... | 03/01/2005 |
| 6729446 | Solenoid-operated driving apparatus and damping force control type hydraulic shock absorber using the same A damping force control type hydraulic shock absorber includes a plunger having a small-diameter main body portion slidably guided by a first fixed core made of a magnetic material. The plunger has a large-diameter attracted portion at an end thereof closer to a sec... | 05/04/2004 |
| 6672436 | Variable bleed orifice valving 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 pr... | 01/06/2004 |
| 6619684 | Bicycle suspension A computer controlled suspension system is provided for a bicycle, which can effectively absorb shock and provide stability on rough surfaces regardless of the speed of the vehicle. The suspension system has a control unit, a front suspension, a rear susp... | 09/16/2003 |
| 6612599 | Bicycle suspension A computer controlled suspension system is provided for a bicycle, which can effectively absorb shock and provide stability on rough surfaces regardless of the speed of the vehicle. The suspension system has a control unit, a front suspension, a rear susp... | 09/02/2003 |
| 6595537 | Bicycle suspension A computer controlled suspension system is provided for a bicycle, which can effectively absorb shock and provide stability on rough surfaces regardless of the speed of the vehicle. The suspension system has a control unit, a front suspension, a rear susp... | 07/22/2003 |
| 6460663 | Hydraulic vibration damper for motor vehicles A hydraulic vibration damper for motor vehicles comprising a cylinder (1) containing damping fluid and a sealed, axially displaceable piston rod (2) that plunges into said cylinder. A damping piston (3) is secured to the lower end of the piston rod and di... | 10/08/2002 |
| 6427986 | Air suspension apparatus An air chamber (53) of a damping force adjusting mechanism (49) disposed in a hydraulic shock absorber (3) of a damping force adjusting type communicates with an air chamber (7) of an air spring through a tubular path (57). A free piston (51) is transferr... | 08/06/2002 |
| 6374967 | Damping force control type hydraulic shock absorber A damping force control type hydraulic shock absorber capable of generating stable damping force even if the flow rate of hydraulic fluid changes sharply. Hydraulic fluid chambers at the respective ends of valve members are cut off from the downstream por... | 04/23/2002 |
| 6286642 | Fluid regulating device for use with a shock-absorbing cylinder to obtain a variable shock absorbing effect A fluid regulating device includes a valve housing formed with a piston receiving chamber that has a piston member slidingly and sealingly disposed therein to divide the piston receiving chamber into a volume-variable gas compartment filled with pressuriz... | 09/11/2001 |
| 6149174 | Electronically controlled bicycle suspension apparatus An electronically controlled bicycle suspension apparatus includes a suspension system, a sensor such as a biaxial accelerometer, an electronics module, at least one actuator and at least one battery for powering the sensor, electronics module and actuato... | 11/21/2000 |
| 6073736 | Valve assembly for a suspension system for a wheeled vehicle A active, hydraulic suspension system for a wheeled vehicle is disclosed. The system utilizes an on-board damper controller, a damper having a pair of telescoping tubes and a motor-adjusted hydraulic channel, a position and direction sensor to achieve com... | 06/13/2000 |
| 6050583 | Electronically controlled bicycle suspension apparatus An electronically controlled bicycle suspension apparatus includes a suspension system, a sensor such as a biaxial accelerometer, an electronics module, at least one actuator and at least one battery for powering the sensor, electronics module and actuato... | 04/18/2000 |
| 5971116 | Electronic suspension system for a wheeled vehicle An active, hydraulic suspension system for a wheeled vehicle is disclosed. The system utilizes an on-board damper controller, a damper having a pair of telescoping tubes and a motor-adjusted hydraulic channel, a position and direction sensor to achieve co... | 10/26/1999 |
| 5911290 | Step motor actuated continuous variable shock absorber 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 wh... | 06/15/1999 |
| 5878850 | Bi-directional pressure control valved damper A damper with continuously variable rates in both extension and compression operation is provided. The damper includes a single tube carrying a piston having at least one pressure chamber and separating the tube into extension and compression chambers. A ... | 03/09/1999 |
| 5521821 | Suspension control system for automotive vehicle A suspension control system for an automotive vehicle is provided in which a movement of a sprung mass velocity is monitored, when the magnitude of the sprung mass velocity is below a predetermined threshold value, a control unit outputs a control signal ... | 05/28/1996 |
| 5518090 | Piston post for a damper A piston post (54) for use in a damper (10) comprising a pressure cylinder (48) having a working chamber (50) with first and second portions. The piston post (54) has a first flow passage (200) fluidly communicating with the first portion of the working c... | 05/21/1996 |
| 5402867 | Shock absorber with auxiliary port in guide member to control hydrodynamic force A cylinder (7) having a hydraulic fluid sealed therein is fitted with a piston (8) having a piston rod (9) connected thereto. The piston rod (9) is provided with a bypass passage (B) (generating relatively small damping force). The passage area of the byp... | 04/04/1995 |
| 5358305 | Suspension system for automotive vehicle or the like A seat suspension is provided that has a damper unit which is connected between the seat and the chassis on which the seat is mounted. The damper can be switched between soft and hard settings. The damper switching is controlled based on the relative posi... | 10/25/1994 |
| 5350187 | Adjustable damping system An adjustable damping system (10) for motor vehicles is disclosed. The adjustable damping system (10) includes dampers (10) for damping road vibration. Each of the dampers (10) include a pressure cylinder (48) which forms a working chamber (50) which are ... | 09/27/1994 |
| 5316114 | Damping force control type hydraulic shock absorber A damping force control type hydraulic shock absorber capable of providing different damping force characteristics during the extension and retraction strokes when the piston speed is low. The hydraulic shock absorber has a piston having a first damping f... | 05/31/1994 |
| 5205385 | Adjustable damping force hydraulic shock absorber An adjustable damping force hydraulic shock absorber includes a cylinder, a piston slidably disposed in the cylinder, two partitioned chambers communicating with each through a plurality of passages, a damping force generating mechanism for generating a d... | 04/27/1993 |