| Class / Patent application number | Description | Number of patent applications / Date published |
|---|
| 123900650 | Spring | 9 |
| 20080230028 | Outward-opening gas-exchange valve system for an internal combustion engine - An outwardly-opening gas-exchange valve assembly for an internal combustion engine. The valve assembly includes a port in a firing chamber in an engine head, the port having a valve seat on a side opposite from the firing chamber. A piston-shaped poppet valve head slides in a bore in the engine head for mating with the valve seat to occlude passage of gas across the valve seat. Withdrawal of the poppet valve head from the seat opens the firing chamber to communication with an intake or exhaust manifold runner in the engine head. The poppet valve head may be actuated by an overcenter lever arrangement actuated selectively by hydraulic pressure or mechanical actuation. In a preferred embodiment, OO intake and exhaust valves are radially arranged in a hemispherical fire deck and may include an adjustable pitch helical channel to induce swirl to the incoming gas. | 09-25-2008 |
| 20090293827 | VALVE SPRING DEVICE AND VALVE TRAIN OF INTERNAL COMBUSTION ENGINE USING THE SAME - A port is formed in a cylinder head of an engine. The port is opened and closed by a valve. A valve spring device is provided with a first spring and a second spring. The second spring is contained in a housing and held by a stopper in a manner such that it is compressed along an axis or subjected to a preload. The preload of the second spring is larger than an installation load of the first spring. An axial load acts on the springs. The valve spring device has load-deflection characteristics such that only the first spring deforms axially when the axial load is not larger than a predetermined value and that both the first and second springs deform axially when the axial is load exceeds the predetermined value. | 12-03-2009 |
| 20100101517 | VALVE DRIVE OF AN INTERNAL COMBUSTION ENGINE - A valve drive of an internal combustion engine, which has a reciprocating poppet valve and a spring element which impinges the closed reciprocating poppet valve with force against the action of a valve seat. The force characteristics are substantially independent of the lift characteristics of the reciprocating poppet valve. The spring element is part of a snap-in locking device, which is stationarily mounted in the engine and surrounds the valve stem of the reciprocating poppet valve. The snap-in locking device has snap-in elements arranged in the power flux between the spring element and reciprocating poppet valve. The snap-in elements are supported in the direction of closure of the reciprocating poppet valve on a snap-in surface of the valve stem when the reciprocating poppet valve is closed and on a snap-in surface of the snap-in locking device when the reciprocating poppet valve is open. | 04-29-2010 |
| 20130298860 | LEAF SPRING BELLOWS INTERNAL COMBUSTION ENGINE - A four-cycle internal combustion engine has a bellows leaf spring working in a compression mode or a tension mode. The leaf spring is connected to a crankshaft and forms a movable portion of a bellows chamber that receives exhaust gases from an engine cylinder. As the exhaust gases transfer from the cylinder to the bellows chamber, the gases push on the leaf spring thereby transferring energy to the crankshaft. | 11-14-2013 |
| 20150013630 | DEVICE FOR THE VARIABLE CONTROL OF AT LEAST ONE VALVE, FOR EXAMPLE FOR A RECIPROCATING ENGINE - A device for controlling at least one valve, the device comprising a body having a non-deformable cavity communicating exclusively with the outside via at least four rectilinear cylinders that are closed respectively by an opening piston (P | 01-15-2015 |
| 123900660 | Attenuated | 2 |
| 20110146604 | VALVE TRAIN OF INTERNAL COMBUSTION ENGINE - A valve train of an internal combustion engine equipped with a valve reciprocated by a cam is equipped with a spring seat manufactured in order to prevent the surging of a coil spring. A spring seat having a squeeze film effect of damping the axial motion of a coil spring is provided at one end of the coil spring in a closing direction. The spring seat is configured to be provided with an oil slit which radially intersects and extends helically around a valve axis. | 06-23-2011 |
| 20160201526 | HELICAL TORSION VALVE SPRING ASSEMBLY | 07-14-2016 |
| 123900670 | Seat and retainer | 2 |
| 20100139596 | VALVE SPRING DEVICE AND VALVE TRAIN OF ENGINE USING THE SAME - A valve spring device is provided with a first coil spring and a second coil spring combined in series with each other. The inside diameter (coil inside diameter) of the second coil spring is greater than the outside diameter (coil outside diameter) of the first coil spring. A part of the first coil spring including an end portion along an axis is inserted into the second coil spring, thereby forming a combined spring. The end portion of the first coil spring and an end portion of the second coil spring are connected to each other by a connecting member. The first and second coil springs are compressed along the axis as they are located in series between a cylinder head and a retainer. A shaft of a valve is passed within the coil springs. | 06-10-2010 |
| 20100224156 | RECIPROCABLE MEMBER WITH ANTI-FLOAT ARRANGEMENT - An exhaust valve arrangement includes a cylinder having a top end, an exhaust conduit connected to the cylinder by an opening in the top end of the cylinder, the opening comprising a valve seat, a valve member comprising a valve stem and a valve head on the valve stem, the valve member being movable between a closed position in which the valve head is received in the valve seat and an open position in which the valve head is spaced from the valve seat, and a resilient member arranged to urge the valve member to a closed position. A piston is mounted relative to the valve stem, the piston being disposed in a second cylinder in flow communication with the exhaust conduit and arranged such that a change in pressure in the exhaust conduit changes a degree of compression of the resilient member. | 09-09-2010 |
