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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 |
| 8137225 | Chain tensioner device A chain tensioner device having a first slide surface of a main arm pivotably supported at an upper end thereof, and a second slide surface of a sub-arm pivotably supported at a lower end thereof. The first and second slide surfaces slidably abut against each other.... | 03/20/2012 |
| 8105194 | Torque biased friction hinge for a tensioner A pivot joint for a single blade spring tensioner or double blade spring tensioner generates a biased friction loss at a pivot joint. The friction torque generated in one direction of joint rotation is greater than the friction torque generated in the opposite direc... | 01/31/2012 |
| 8105195 | Rotational one way clutch chain tensioner with frictional damping A tensioner for a power transmission system includes two tensioning arms operatively engaged with a strand of either the chain or the belt of the power transmission system. The upper end of each tensioning arm is connected to a one way rotational clutch which is piv... | 01/31/2012 |
| 8092327 | Tensioner lever for chain drive In a spring-loaded tensioner lever having a coiled torsion spring accommodated in a space inside the lever, a stopper mechanism, comprising a pin held removably in a hole in the lever, holds an arm of the torsion spring against movement in the unwinding direction wh... | 01/10/2012 |
| 8083623 | Shoe tensioner for a synchronous belt drive for use with oil A shoe tensioner for a synchronous belt drive, having a guide member adapted to cooperate with a drive belt and hinged at one end about a first axis; elastic means cooperating with the guide member to tension the belt; and connecting means for connecting the tension... | 12/27/2011 |
| 8066600 | Ratchet mechanism for a chain drive A ratcheting tensioning device for a closed loop chain driven power transmission system of an internal combustion engine consisting of a base tensioner arm (12) and an adjusting tensioner arm (14) which each contact different strands or chain. Optional... | 11/29/2011 |
| 8062157 | Tensioner with an adjuster The present invention relates to a tensioner, in particular a tensioner for a driving chain of an internal combustion engine, comprising a tensioning plunger which is axially movably guided in a plunger bore of a plunger reception means and an adjuster for readjusti... | 11/22/2011 |
| 8057333 | Series spring blade tensioner A blade tensioner includes a blade shoe assembly with parallel stacked flat springs that pivots at one end and is supported in series by a spring loaded ramp at the opposite end. Providing a spring loaded ramp in series reduces the overall stiffness of the tensioner... | 11/15/2011 |
| 8052559 | Tensioner with two way damper A tensioner for a power transmission system includes two tensioning arms operatively engaged with the strand of the chain or the belt of the power transmission system. The upper end of each tensioning arm is connected to a two way damper which is pivotally mounted b... | 11/08/2011 |
| 8052558 | Force limiting tensioning arm A tensioner for a chain driven power transmission system of an internal combustion engine, having a ratchet as part of the tensioning system is disclosed. The tensioner contains at least one bracket that is pivotally mounted to the engine adjacent one strand of the ... | 11/08/2011 |
| 8047938 | Transmission device of walking type self-traveling lawn mower A transmission device (1) of a walking type self-traveling lawn mower (4) in which the reliable transmission of a rotating power is achieved as in the case of a shaft drive system by solving the problem of the durability of the transmission belt of con... | 11/01/2011 |
| 8007385 | Sliding contact guide for transmission device In a sliding contact chain guide of the kind used in the timing transmission of an internal combustion engine, the back of the guide shoe, which engages a metal guide base, is formed with two, spaced longitudinal ribs, having between them a set of ribs formed in a l... | 08/30/2011 |
| 8007386 | Blade tensioner with opposing spans A tensioner for tensioning a strand of chain between two sprockets including a tensioner body and a ramp fixed to ground. The tensioner body has an oval shape defined by first and second arcuately curved sides. Each side has a distal end, a proximal end, and a blade... | 08/30/2011 |
| 7967708 | Chain guide for use in engine A chain guide is composed of a resin shoe engageable with an aluminum base frame. The shoe has a hook formed at a chain entry end for engagement with a chain entry end of the base frame, and a C-shaped hook at the chain exit end engageable with a side edge of the ba... | 06/28/2011 |
| 7955206 | Self-energizing brake for a tensioner A tensioner that includes a blade shoe (106), at least one blade spring (112), a ramp 122), and a brake (132). The blade shoe has a curved chain sliding face, an underside, opposite the chain sliding face, a proximal end pivotally attache... | 06/07/2011 |
| 7951029 | Guide for transmission device In an engine timing chain guide composed of a synthetic resin shoe supported on a frame by L-shaped and strip-shaped engagement members integrally molded as unitary parts of the shoe, the L-shaped members are formed with oblique tongues that resiliently engage side ... | 05/31/2011 |
| 7901309 | Tensioner for a timing chain A tensioner has a base plate and a pivot arm. A first end of the pivot arm is pivotally mounted to the base plate for rotation about a first axis. A spring biases the pivot arm to rotate in a tensioning direction. A push rod assembly is pivotally mounted to the seco... | 03/08/2011 |
| 7874949 | Power unit with auxiliary machine driving transmission mechanism In a power unit, a counter shaft of a transmission and a crank shaft of an internal combustion engine, both located below a main shaft of the transmission, are arranged parallel to each other on a separating plane H of a crankcase. In a transmission mechanism T whic... | 01/25/2011 |
| 7815533 | Camshaft drive system for internal combustion engine A camshaft drive system for an internal combustion engine includes a drive sprocket fixed upon a crankshaft of the engine and a driven sprocket fixed upon a camshaft of the engine. A flexible power transmission element extends between the drive sprocket and driven s... | 10/19/2010 |
| 7740553 | Detachable feed tray with self adjusting side guides A method and mechanism are provided for controlling the movement of a belt. The arrangement may have a moveable member is coupled to an adjustable member. The members are coupled such that when the moveable member is moved in a first direction the adjustable member ... | 06/22/2010 |
| 7727098 | Chain tensioner A chain tensioner includes a housing defining a cylinder chamber having a closed end. A cylindrical plunger having a closed front end is slidably received in the cylinder chamber. A nut member and a return spring are mounted in the cylinder chamber. The return sprin... | 06/01/2010 |
| 7691018 | Wedge-damped blade tensioner A blade tensioner system for a chain that imparts tension to a chain that drivingly connects to a driven shaft to a drive shaft in an engine. The blade tensioner comprises a blade shoe and mating block. The blade shoe has an arcuately curved chain sliding face, a pr... | 04/06/2010 |
| 7686718 | Timing chain drive system In the timing drive of an internal combustion engine, cyclic variations in chain tension, in the span traveling from a camshaft sprocket toward the crankshaft sprocket are leveled by synchronous reciprocating movement of a guide in sliding contact with that span of ... | 03/30/2010 |
| 7641577 | Mechanical chain tensioner with compliant blade spring A tensioner for imparting tension to a chain having a body, a resilient chain guide element, at least one blade spring, and at least one bracket. The body of the tensioner has a surface with a profile of the path of a new chain and a groove found longitudinally alon... | 01/05/2010 |
| 7632200 | Common link dual arm tensioning device A chain tensioning device links multiple tensioning arms to a common link, causing the tensioning arms to rotate into and displace chain strands with a single applied force and motion. The two tensioning arms rotate and tension proportionally, and when the pivot pin... | 12/15/2009 |
| 7628719 | Mechanical strap tensioner for multi-strand tensioning A tensioner for a closed loop power transmission system for an internal combustion engine having a drive shaft terminating in a sprocket and at least one camshaft, each terminating in a sprocket, with a single continuous chain wrapping around all of the sprockets. T... | 12/08/2009 |
| 7597640 | Long mechanical tensioner with a compliant blade spring A tensioner for imparting tension to a chain having a body, a resilient chain guide element a support member and at least one blade spring. The body contains at least one groove on its surface adjacent to the resilient chain guide for containing a blade spring in co... | 10/06/2009 |
| 7540817 | Tensioner with one-way clutch A tensioner for maintaining tension in a timing chain or belt comprises a pivotally mounted lever body biased in a direction to increase tension in the chain or belt, and having a built-in, one-way clutch permitting the lever to pivot the tension-increasing directio... | 06/02/2009 |
| 7537533 | Chain tensioning device linking two strands of a chain drive A tensioner for imparting tension to a chain in a closed loop chain drive system of an internal combustion engine is disclosed. The tensioner contains two tensioning devices, one for each strand of chain that traverses between a drive sprocket and at least one drive... | 05/26/2009 |
| 7524254 | Guide for transmission device In a sliding contact chain guide of the kind used in the timing transmission of an internal combustion engine, a synthetic resin guide shoe is attached to a pivoting support arm by protrusions formed as unitary parts of the shoe, which engage notches formed in the s... | 04/28/2009 |
| 7513844 | Tensioner with improved stopper In a tensioner for a timing chain, a spring-biased plunger for urging a shoe into sliding engagement with the chain is temporarily held in a retracted condition, prior to installation of the tensioner, by a stopper having a pin that extends through a hole in the ten... | 04/07/2009 |
| 7513843 | Mechanical chain tensioner with ratcheting device A blade tensioner comprising a blade shoe, a sliding surface with a first and a second side, a ratchet rod attached to the distal end of the blade shoe having a length of teeth, and a spring clip for receiving the ratchet rod and being slidable along the second side... | 04/07/2009 |
| 7479077 | Pivoting mechanical tensioner with compliant blade spring A tensioner for imparting tension to a chain having a body, a resilient chain guide element, at least one blade spring, and at least one bracket. The body of the tensioner has a surface with a profile of the path of a new chain and a groove found longitudinally alon... | 01/20/2009 |
| 7476168 | Pivoting mechanical tensioner with cross strand damping A closed loop chain tensioner system having a drive sprocket, one or more driven sprockets, a first mechanical tensioner located adjacent a slack strand and a second mechanical tensioner located adjacent a tight strand. Each tensioner is independently pivotally moun... | 01/13/2009 |
| 7473197 | Tensioning rail applied by injection molding A method of producing a movable tensioning element of a tensioning device for tensioning flexible drive means, in particular for timing chain drives of internal combustion engines, the tensioning element having at least a tensioning piston and a tensioning rail made... | 01/06/2009 |
| 7429226 | Tensioning device A traction mechanism, in particular for driving the camshafts of an internal combustion engine, is provided. The mechanism includes a drive wheel, a driven wheel, a traction element and first and second tensioner slide rails. One slide rail can be subjected to a cla... | 09/30/2008 |
| 7404777 | Power transmission incorporating tensioner lever In a tensioner lever assembly for a chain transmission, an auxiliary lever, arranged to pivot relative to a main tensioner lever, engages a free span of the chain approaching the main lever from a driving sprocket. The auxiliary lever can be pivoted coaxially with t... | 07/29/2008 |
| 7390276 | Belt assembly with a tensioning device A belt assembly, particularly for driving camshafts of an internal combustion engine, includes a driving gear, at least one driven gear, a belt, and a first and a second tensioner blade that are joined to one another for transmitting a defined force and motion. One ... | 06/24/2008 |
| 7338399 | Chain power-transmission system with mechanical tightener A mechanical power-transmission system with chain including a mechanical tightener acting on a branch of the chain and having in turn a base, a tightening shoe in dragging contact with the chain and a sliding wedge under the thrust of a first spring in an irreversib... | 03/04/2008 |
| 7329196 | Guide for transmission device In a guide for a transmission chain, a slide rail elongated in the direction of travel of the chain, and having a front surface for sliding engagement with the chain, is supported by a rail support which extends perpendicularly from the back side of the slide rail. ... | 02/12/2008 |
