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An aircraft having vertical takeoff and landing capability provided with at least first and second laterally extending paddle wheels rotatable on a central axis perpendicular to the longitudinal axis of the aircraft fuselage and between its nose and tail.
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| Number | Title | Issue Date |
| 8167101 | Damping force generating mechanism for shock absorber A shock absorber comprises a first passage (2a, 2b) and a second passage (15) connecting a first fluid chamber (41) and a second fluid chamber (42). A throttle (12, 14) narrows an inflow of fluid to the first p... | 05/01/2012 |
| 7568562 | Self-pumping hydropneumatic spring strut A self-pumping hydropneumatic spring strut includes an oil-filled working cylinder which is divided into two working spaces by a working piston carried by a hollow piston rod. Two high-pressure chambers connectable to the cylinder in such that the piston rod is sele... | 08/04/2009 |
| 7431135 | Stroke dependent damping A two-stage shock absorber has a pressure tube within which a piston assembly is slidably disposed. A piston rod is attached to the piston assembly and extends out of the pressure tube. A sleeve is slidably disposed within the pressure tube and engages the piston ro... | 10/07/2008 |
| 7428953 | Gas spring with end position damping The invention relates to a gas spring with end position damping having a piston-cylinder unit which is provided with two identically configured pistons arranged in a mirror-like image. Each piston has two axially extending parts defining an annular groove therebetwe... | 09/30/2008 |
| 7395907 | Shock absorber with frequency-dependent damping Shock absorber containing a flow channel (16), provided with a valve assembly, made in the piston section. This valve assembly is designed to be actuated hydraulically. To this end there is an auxiliary chamber (22, 42) which on one side is eliminated ... | 07/08/2008 |
| 7370849 | Self-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 |
| 7358635 | Magnetic power transmission devices for oilfield applications A method and apparatus relates to incorporating a magnetic coupling for use in oilfield applications. The magnetic coupling is operatively coupled to an oilfield machine to provide a controlled operational speed. The magnetic coupling may be operatively connected to... | 04/15/2008 |
| 7347651 | Drilling device In order to improve a device (100) for a drilling machine (10) known per se for manual drilling with a casing (11), a grip (12), a tool chuck (13) and a tool (14), especially a drilling, reaming or counterboring tool, in suc... | 03/25/2008 |
| 7322449 | Hydraulic shock absorber A piston connected to a piston rod is fitted into a cylinder in which a hydraulic fluid is sealably contained. A flow of the hydraulic fluid is generated in an extension-side fluid passage and a compression-side fluid passage according to a sliding motion of the pis... | 01/29/2008 |
| 7322657 | Stroke simulator A second piston includes a first protruding portion that protrudes toward a first piston and a second protruding portion that protrudes toward a stopper. By changing a height of the first protruding portion and a height of the second protruding portion it is possibl... | 01/29/2008 |
| 7320387 | Load adaptive damper with transient air signal restrictor A shock absorber for a vehicle suspension includes a pneumatic actuator that is fluidly connected to a compressed air source in the vehicle suspension, such as a suspension air bag. The pneumatic actuator cooperates with an adjustment mechanism housed within the sho... | 01/22/2008 |
| 7308976 | Hydraulic dampers with pressure regulated control valve A suspension damper includes a housing bounding a main chamber. A hydraulic fluid is disposed within the main chamber. A piston rod is selectively movable between an advanced position wherein a portion of the piston rod is advanced into the main chamber and a retrac... | 12/18/2007 |
| 7290643 | Front fork in two-wheeled motor vehicle or the like In a front fork in a two-wheeled vehicle or motor vehicle, a partition wall member sectioning an oil reservoir chamber into upper end lower sides is provided in an upper portion of a hollow pipe. A center hole and an expansion and compression common flow passage are... | 11/06/2007 |
| 7273138 | Damping force variable valve and shock absorber using same A damping force variable valve includes a main valve provided between a high pressure section and a low pressure section, for allowing a flow of oil from the high pressure section into the low pressure section when the main valve is opened, the main valve being capa... | 09/25/2007 |
| 7234574 | Damping coefficient switching-type hydraulic damper There is disclosed a damping coefficient switching-type hydraulic damper that may automatically switch a damping coefficient without needing supply of energy from the outside at all, and also may always surely exert an energy absorption capacity greater than that of... | 06/26/2007 |
| 7216747 | Amplitude controlled orifice valving A dual tube shock absorber includes a spool valve located between the upper working chamber and the reserve chamber. The spool valve moves with the piston rod to open and close a flow path between the upper working chamber and the reserve chamber. This provides a lo... | 05/15/2007 |
| 7172057 | Vibration damper with amplitude-dependent damping force Vibration damper comprising a piston rod, which is guided with freedom of axial movement in a damping medium-filled cylinder and which carries a piston, which divides the cylinder into two working spaces. At least one of the two working spaces has a flow connection ... | 02/06/2007 |
| 7156776 | Easy access stepper An apparatus is disclosed for an easy to mount and easy to use exercise machine especially helpful to disabled, convalescing and elderly people. Both foot pedals (148) are at their lowest position to start and are dependent on each other. The lever-arms (1... | 01/02/2007 |
| 7156213 | Shock absorber having a hydraulic stop A shock absorber includes a hydraulic stop. The hydraulic stop includes two housings connected together by a spring. At the end of the stroke of the shock absorber, the piston causes the two housings to approach each other thereby causing fluid disposed between the ... | 01/02/2007 |
| 7143875 | Attenuation coefficient switching type hydraulic damper A hydraulic damper used for reducing shaking of a structure, for example in an earthquake. The hydraulic damper has a cylinder, a piston movable in a reciprocating manner within the cylinder, hydraulic chambers at opposite sides of the piston, and a single on-off co... | 12/05/2006 |
| 7111711 | Vibration damper with stroke-dependent damping force Vibration damper, containing a damping medium-filled cylinder, in which a piston rod with a piston is installed with freedom of axial movement, where, as a function of the stroke of the piston, a bypass connects a working space on the piston rod side to a working sp... | 09/26/2006 |
| 7097012 | Compact temperature compensating gas spring A compact temperature compensating gas spring including a gas filled hollow cylinder and a piston assembly slidably received in the gas filled hollow cylinder. The piston assembly includes a piston head and a piston rod. The piston rod includes a temperature compens... | 08/29/2006 |
| 7070028 | Frequency 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 |
| 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 |
| 7032727 | Shock absorber having a hydraulic stop A shock absorber includes a hydraulic stop. The hydraulic stop includes two housings connected together by a spring. At the end of the stroke of the shock absorber, the piston causes the two housings to approach each other thereby causing fluid disposed between the ... | 04/25/2006 |
| 6997959 | Multi-functional artifical knee joint An artificial knee joint connects a prosthetic lower leg to a residual thigh of a prosthesis wearer, and includes a knee-extending oil passage and a knee-flexing oil passage that is provided with a throttle valve. When the lower leg is pressed against the ground by ... | 02/14/2006 |
| 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 |
| 6964546 | Method and apparatus for drilling countersunk holes A drilling apparatus includes a drill, a surge control device and a countersink limiter coupled to the drill, and a rotatable cutting tool coupled to the countersink limiter. The cutting tool includes a drilling portion operable to form a hole, a countersink portion... | 11/15/2005 |
| 6959796 | Adjustable damper with valve mounted in-line A damper includes an outer cylinder and an inner cylinder. The inner cylinder is disposed inside the outer cylinder and contains a rod and valve to define an upper working chamber and a lower working chamber. An adjustable valve portion fluidly communicates the uppe... | 11/01/2005 |
| 6918472 | Arrangement for a piston and cylinder device The hydraulic cylinder or shock absorber arrangement has a cylinder unit limiting an inner space in which a medium in the form of a gas or a liquid is intended to be placed. A forwardly and backwardly movable piston unit is placed such that it can slide within the s... | 07/19/2005 |
| 6904839 | Oleopneumatic actuator cylinder device for the alignment in rectilinear drive of steering or self-steering axles of vehicles An oleopneumatic actuator cylinder device for steering and self-centering for the alignment to a straight drive of steering or self-steering axles, in particular for rear axles of vehicles, is constituted by a single oleopneumatic actuator cylinder for each rear ste... | 06/14/2005 |
| 6880684 | Flow regulator for a gas shock absorber A flow regulator for a gas shock absorber is connected between the primary cylinder and the secondary cylinder. The flow regulator allows a user to adjust the rate of flow of fluid from the primary cylinder to the secondary cylinder thereby varying the damping prope... | 04/19/2005 |
| 6863163 | Self 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 |
| 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 |
| 6782980 | Controllable damping force hydraulic shock absorber A piston having a piston rod connected thereto is slidably fitted in a cylinder in which a hydraulic fluid is sealably contained. Extension-stroke and compression-stroke pilot type damping force control mechanisms are provided in the piston. A pilot control valve of... | 08/31/2004 |
| 6749045 | Passive force element on the basis of electrorheologic liquids A passive force element on the basis of electrorheological liquids includes a piston with a piston rod guided in a cylindrical housing, and a force introduction element connected with the piston rod. The piston forms, in the cylindrical housing, two variable-volume ... | 06/15/2004 |
| 6736245 | Dampening cylinder incorporating stop valve A dampening cylinder is provided. The dampening cylinder includes a cylindrical housing defining a cavity for receiving a fluid therein. A piston slidably extends through the cavity in the housing and includes a flange projecting radially therefrom. The flange is po... | 05/18/2004 |
| 6684990 | Tube structure and tube manufacturing method for hydraulic damper In a tube structure of a hydraulic damper, an outer tube and an inner tube are separately formed by extrusion, and using this outer tube or inner tube, as it has ribs integrally formed on an inside wall of the outer tube or outside wall of the inner tube,... | 02/03/2004 |
| 6668986 | Active hydraulic fluid vehicular suspension damper A vehicular damper includes a cylinder, a piston rod in the cylinder having a hollow end defining an axial rod passage and a cylindrical piston affixed to the end of the rod dividing the cylinder into a compression chamber and a rebound chamber. A valve p... | 12/30/2003 |
| 6659240 | Arrangement for a piston and cylinder device The hydraulic cylinder or shock absorber arrangement has a cylinder unit limiting an inner space in which a medium in the form of a gas or a liquid is intended to be placed. A forwardly and backwardly movable piston unit is placed such that it can slide w... | 12/09/2003 |
