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| Number | Title | Issue Date |
| 7140337 | Valve gear mechanism In a valve gear mechanism of an internal combustion engine, there is provided a valve opening and closing a combustion chamber, a spring device which generates a force pressing the valve toward a valve seat, a drive mechanism driving the valve in an opening directio... | 11/28/2006 |
| 7082916 | Valve spring support structure of engine A spring seat is formed of an outer spring seat 10k and an inner spring seat 10j formed in a stepped-down shape so as to be positioned lower than the outer spring seat 10k, and a valve spring is formed of an outer spring ... | 08/01/2006 |
| 7044097 | Cylinder head A cylinder head 12 showing a guideway in which is located a rotatable valve 10, 12 comprising a fluid port operable to effect fluid communication between a cylinder and a fulid manifold in the guideway, whereby rotation of the valve effects alignment o... | 05/16/2006 |
| 7017538 | Method of producing a powerful and efficient internal combustion four stroke engine using a blower and a single valve cylinder The present invention relates generally to a method for providing an efficient and powerful engine for internal combustion four stroke engines using a single valve per cylinder as the intake and exhaust valve. Outside air emerging from an air filter is forcibly pump... | 03/28/2006 |
| 6532925 | Stamped valve spring and retainer A bias element which urges the valves in an internal combustion engine into their closed positions and includes a pair of arms and a bight portion connecting the two arms. Each arm has an aperture therein with at least one arm having an aperture that is k... | 03/18/2003 |
| 5884596 | Valve spring in an internal combustion engine A valve spring is used in a valve operating mechanism for moving a poppet valve up and down in an internal combustion engine of an automobile. The terminal end of the uppermost portion of the valve spring extends in a tangential direction to go away from ... | 03/23/1999 |
| 5692462 | Transfer valve assembly providing variable valve lash A valve assembly for use in a dual compression/dual expansion engine having an internal housing operating within an external housing, the valve assembly having a valve element operating in a valve guide secured to the internal housing with a valve spring ... | 12/02/1997 |
| 5664527 | Pneumatic valve recoil system for internal combustion engines A pneumatic valve recoil system includes a piston that is unitary with the stem of a valve and which slides in a cylinder, such that the piston, valve stem, and cylinder cooperate to form a chamber containing a compressible fluid. The chamber is connected... | 09/09/1997 |
| 5586529 | Pneumatic engine valve spring assembly Pneumatic valve spring members (10) provide replacement for mechanical springs used to seat engine valves in internal-combustion engines. A valve guide (16) sits atop the engine head 40, allowing the valve stem (12) of valve (14) to pass and reciprocate t... | 12/24/1996 |
| 5558054 | Variable preload system for valve springs A valve system for use in internal combustion engines includes a means for controllably varying the preload force imposed on a valve spring in correlation with engine speed. At low engine speeds the preload force is maintained at a minimal level whereby t... | 09/24/1996 |
| 5322039 | Valve spring top collar A valve spring top collar is formed by a unitary body having a circular top face and a bottom surface, with a first circular shoulder extending downwardly from the bottom surface of the body and a second inwardly spaced circular shoulder. The shoulders ar... | 06/21/1994 |
| 5255640 | Bi-plastic self-locking valve spring retainer A self-locking valve spring retainer (30) operatively retaining a return spring (28) on the stem (20) of a poppet valve (16) comprises an annular base ring (48) from which three flexible arms (52) upwardly extend. A locking step (66) projects radially inw... | 10/26/1993 |
| 5207196 | Pre-assembled unit for engine valve system A pre-assembled unit 10 for use in assembly of an engine valve system 150 in an engine 152. The pre-assembled unit 10 includes a spring 14 for providing a force for urging an engine valve 156 in a first direction, a spring seat 20 engaged with the spring ... | 05/04/1993 |
| 4777916 | Valve spring device for a valve in an internal combustion engine The invention relates to a valve spring device for a valve in an internal combustion engine. The valve has a valve disc (4) cooperating with a valve seat (5) to control the flow in an engine duct (3), and a valve spindle (6) extending from the valve disc ... | 10/18/1988 |
| 4653726 | Valve spring retainer/locking assembly A valve spring retainer and locking assembly comprising a locking member which is made screen-like and engages at least one peripheral groove of a valve stem end in a manner known per se employing a bulge, and is pressed against the valve stem end via a c... | 03/31/1987 |
| 4615507 | Spring return system for a component able to move reciprocally A spring return for the reciprocable slide of an hydraulic distributor. The return spring is trapped between flanges of opposed cup-shaped rings. The cup-shaped rings have conical sections which are positioned inside of the spring, but which do not contac... | 10/07/1986 |
| 4572117 | Valve arrangement for an internal combustion engine A valve train for an internal combustion engine embodying an improved valve spring arrangement that permits a compact valve placement. The valve springs are disposed so that they are non-circular in planes perpendicular to the axis of the associated valve... | 02/25/1986 |
| 4559909 | Valve mechanism for an internal combustion engine A valve mechanism for a poppet valve of an internal combustion engine having a conventional cam and rocker arm control mechanism. Valve springs are positioned and compressed between the poppet valve and a valve spring retainer. The valve spring retainer m... | 12/24/1985 |
| 4538563 | Helical coil spring damper assemblies An improved spring damper assembly is disclosed which comprises a helical coil spring having a generally cylindrically shaped sleeve member fitted thereto. The sleeve member has resilient sidewall portions which are designed to frictionally engage surface... | 09/03/1985 |
| 4515346 | Valve spring retainer assembly A valve spring retainer assembly includes a valve stem for reciprocation with respect to an engine head. A valve spring retainer provides a thrust surface against which a valve spring biases the valve stem into a closed position. The retainer includes an ... | 05/07/1985 |
| 4509473 | Spring damper with controlled wear area An internal type, spring damper for use in an internal combustion engine or the like having a cylinder head with a poppet valve supported for movement between valve open and valve closed positions and with a coiled valve return spring loosely encircling t... | 04/09/1985 |
| 4479461 | Coil spring damper for valve assemblies of internal combustion engines A vibration damper for a coil spring 16 includes a cylindrical shaped sleeve 18 which receives the coil spring 16 such that the outer portions 38 of the coils 36 slidably abut the inside surface of wall 20 of the sleeve 18 to provide frictional damping of... | 10/30/1984 |
| 4470383 | Valve spring damper A valve spring damper has a split ring, to frictionally engage the coils of the valve return spring for a valve, and integral radial extending load carrying feet against which one end of the return spring abuts, the surface of each foot opposite the sprin... | 09/11/1984 |
| 4432311 | Composite valve spring retainer and process A lightweight composite valve spring retainer is provided to decrease fuel consumption, attenuate noise, and permit increased speed of operation.... | 02/21/1984 |
| 4321894 | Poppet valve spring retainer with integral mechanical adjustable tappet A device for the adjustment of the gap between the valve stem and rocker arm or cam shaft of an internal combustion engine having a lower valve spring retainer base and upper cap member with adjustment means associated therewith.... | 03/30/1982 |
| 4180030 | Valve lock assembly A device for attaching a valve stem to a valve spring retainer. The device includes two wedge-like key members for wedgably locking the valve spring retainer to the valve stem. Each key member has a cavity for receiving a portion of a cup-shaped lash cap ... | 12/25/1979 |
| 3995605 | Jet ignition engine with singly actuated dual inlet valves An internal combustion engine having interconnected main and auxiliary combustion chambers, respectively, supplied with air-fuel mixtures through separate main and auxiliary intake passages is provided with an inlet valve having a single stem carrying two... | 12/07/1976 |
