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| Number | Title | Issue Date |
| 7401582 | Camshaft phaser having designated contact vane In a vane-type camshaft phaser, one vane extends over a much larger internal angle than the other two vanes. Because of its size and strength, the large vane is the vane designated for contact with the stator. The other vanes and lobes have extra clearance to preven... | 07/22/2008 |
| 7334603 | Check valve A check valve has an elastic valve body portion and an inelastic valve body portion and a valve seat. The valve body is fixed to a valve shaft, and a valve body abutment plate for abutting the elastic valve body portion is supported to the valve shaft. The valve bod... | 02/26/2008 |
| 7305951 | Two-step roller finger follower A two-step roller finger follower having a high-lift follower portion that rotates relative to a low-lift follower portion about a pivot shaft, including a lost-motion compression spring disposed in a linear bore formed in the high-lift portion to exert force agains... | 12/11/2007 |
| 7165521 | Variable valve timing control device A variable valve timing control device includes a rotational shaft, a rotation transmitting member assembled around the rotational shaft, and a vane assembled to one of the rotational shaft and the rotation transmitting member. The variable valve timing control devi... | 01/23/2007 |
| 7156058 | Variable valve actuator Actuators, and corresponding methods and systems for controlling such actuators, provide independent lift and timing control with minimum energy consumption, while supplying sufficient supplemental energy to overcome friction. In an exemplary embodiment, an actuatio... | 01/02/2007 |
| 7143993 | Exhaust gas recirculation valve having a rotary motor An exhaust gas recirculation valve is provided. The exhaust gas recirculation valve has a base, a spring biasing the valve closed, and an actuator including a rotary motor and a linearly displaceable shaft that is coupled to the motor's rotor. The valve includes a v... | 12/05/2006 |
| 7134410 | Detachable connection for coupling a gas exchange valve of an internal combustion engine to an actuator Disclosed is a simple, easy-to-produce, and reliable connection between a shaft of a gas exchange valve and an actuator. This connection is detachable and, as a result, can be connected and disconnected multiple times. It is also possible to dispose the coupling pie... | 11/14/2006 |
| 6966539 | Valve spring retainer A lightweight valve spring retainer with a wear resistant spring seat or seats is provided. The spring seats may be defined in part by a tungsten carbide layer. ... | 11/22/2005 |
| 6886513 | Valve mechanism comprising a variable cross-section of a valve opening The invention relates to an intake or exhaust valve mechanism with a variable valve opening cross section for use in an admission opening of an internal combustion engine and having a gas exchange valve acted on by the force of a valve spring and displaceable axiall... | 05/03/2005 |
| 6564764 | Switchable tappet for directly transmitting a cam lift onto a tappet push rod A switchable tappet for directly transmitting a cam lift onto a tappet push rod, includes a housing having a push rod distal end which is formed with a ramp surface for contact by a cam. An inner element is placed in a recess of thehousing and has a push ... | 05/20/2003 |
| 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 |
| 6505593 | Valve spring set load changing device in a valve moving apparatus of an internal combustion engine A valve moving apparatus of an internal combustion engine comprises an engine valve, a valve spring, a spring seat supporting an end of the valve spring and a cam driving the engine valve to open. A valve spring set load changing device in the valve movin... | 01/14/2003 |
| 6450138 | Valve timing adjusting device A valve timing regulation device for regulating the timing of the opening and closing of the valves in an internal combustion engine, includes: a rotor urging member 40, 41 for urging the rotor 18 toward a predetermined lock position with respect to the h... | 09/17/2002 |
| 6382153 | Partial internal guide for curved helical compression spring A variable valve actuating comprising a spring guide for use with a curved spring includes an elongate, curved guide member having a centerline. The centerline has a centerline curvature that is substantially equal to the radius of curvature of the curved... | 05/07/2002 |
| 6371063 | Valve-open-close mechanism It is proposed to lessen the weight and improve the mechanical strength of a retainer of a valve open-close mechanism driven by an electromagnetic actuator used in an automotive internal combustion engine. The electromagnetic actuator is mounted in a hous... | 04/16/2002 |
| 6341588 | Valve spring retainer and a valve operating mechanism A valve spring retainer is mounted to the upper end of a poppet valve via a pair of cotters in an internal combustion engine of an automobile. The valve spring retainer has an intermediate portion and an outer flange which is engaged with the upper end of... | 01/29/2002 |
| 6338325 | Valve operating mechanism of an internal combustion engine To operate a poppet valve in an internal combustion engine, a valve operating mechanism comprises a valve spring retainer which has a taper bore, a pair of cotters which is inserted in the bore to support the poppet valve, and a valve spring between the v... | 01/15/2002 |
| 6311661 | Valve spring retainer and a valve operating mechanism A valve spring retainer is mounted to the upper end of a poppet valve via a pair of cotters in an internal combustion engine of an automobile. The valve spring retainer has an intermediate portion and an outer flange which is engaged with the upper end of... | 11/06/2001 |
| 6293240 | Valve spring retainer and a valve operating mechanism A valve spring retainer is mounted to the upper end of a poppet valve via a pair of cotters in an internal combustion engine of an automobile. The valve spring retainer has an intermediate portion and an outer flange which is engaged with the upper end of... | 09/25/2001 |
| 6279526 | Valve gear for an internal-combustion engine A valve gear controls a gas exchange in an internal-combustion engine with a valve spring which holds a valve in its required position at all times and is clamped between a valve head and a valve-spring support. The valve spring support is adjustable in t... | 08/28/2001 |
| 6273046 | Valve spring retainer with skirt The valve stem (20) extends through the ring (56) and the hole (52) in the flange (50) of a retainer (30) and a spring (28) surrounds the stem (20) and engages the flange (50) in the axial direction and a skirt portion (60) in the radial direction. The re... | 08/14/2001 |
| 6273045 | Valve spring retainer-enlarged slots A valve spring retainer (30) for operatively retaining a return spring (28) on a stem (20) of a poppet valve in an internal combustion engine. The retainer (30) includes a retainer flange (50) extending annularly about and radially from a hole (52) on a c... | 08/14/2001 |
| 6082315 | Electromagnetic valve actuator An electromagnetic valve actuator is disclosed. The actuator includes an upper electromagnet and a lower electromagnet placed in a mirror relationship to each other about a central vertical axis, an armature element disposed intermediate the upper and low... | 07/04/2000 |
| 6062181 | Arrangement for an electromagnetic valve timing control An arrangement for an electromagnetic valve timing gear has an armature plate which can be adjusted between two end positions and which is held in the end positions by a solenoid system having switching magnets. A spring device with a resilient element is... | 05/16/2000 |
| 5873563 | Valve Lock An improved valve lock comprises a plurality of tapered arcuate sections that fit together to provide a sleeve that fits on the tip of a valve stem, with the inner surfaces of the arcuate sections having raised ridges thereon that mate with corresponding ... | 02/23/1999 |
| 5743225 | Valve system for engine A valve system for an engine comprises a plurality of intake or exhaust valves, adapted to be driven by cams of which the profiles are different from each other to make maximum valve lifts of the valves different from each other, and compression springs b... | 04/28/1998 |
| 5664531 | Device for adjusting valve duration using external air supply An improved device for adjusting a valve lift using external air supply, includes an operating chamber with a piston, and inner and outer valve spring seats with wax whereby in a low speed vehicle, when the engine oil has a high pressure, the heated air e... | 09/09/1997 |
| 5662075 | Universal valve lifter block and cap for motorcycle engines A universal valve lifter block and cap assembly for motorcycle engines. The valve lifter block is configured to accept several different caps. One of the caps which may be accepted is configured to hold a spring which is used to provide additional downwar... | 09/02/1997 |
| 5619961 | Poppet valve retainer system for internal combustion engine A retainer system for securing a poppet valve within a cylinder head of an internal combustion engine includes a retainer washer having a tapered bore, and a valve stem having annular grooves with different axial lengths which match lands formed on the in... | 04/15/1997 |
| 5596964 | Intake and exhaust valves and intake port of internal combustion engine Each of intake and exhaust valves of an internal combustion engine has a valve retainer provided with a center hole through which the upper portion of each valve stem passes, a flange and a raised portion surrounded by the flange and around the center hol... | 01/28/1997 |
| 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 |
| 5497740 | Ceramic valve for internal combustion engines having a reduced tendency to stress fracture The invention concerns a ceramic valve for internal combustion engines whose spring retainer is frictionally linked to the valve stem, and whose cylindrical valve stem (2) is surrounded by a collet (3) having a conical outer profile (4). The spring retain... | 03/12/1996 |
| 5385125 | Four cycle engine A multiple valve internal combustion engine and specifically a cylinder head and valve operating mechanism therefore. The cylinder head is formed from a two part construction and an arrangement is provided for operating the valves that permits a maximum v... | 01/31/1995 |
| 5381765 | Valve spring retainer A keyless valve spring retainer for an internal combustion engine. The valve spring retainer has a high load strength yet can be easily assembled or unassembled on a valve stem. It includes a curved arm portion which permits the spring retainer to be loca... | 01/17/1995 |
| 5357918 | Valve operating mechanism for internal-combustion engines A valve operating mechanism for internal-combustion engines has a valve and a pressure spring which is to move the valve into a closed end position and which is supported on a spring plate. For the reduction of the valve operating masses, at least the val... | 10/25/1994 |
| 5343835 | Valve spring retainer A keyless valve spring retainer for an internal combustion engine. The valve spring retainer has a high load strength yet can be easily assembled or unassembled on a valve stem. It includes a curved arm portion which permits the spring retainer to be loca... | 09/06/1994 |
| 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 |
| 5313917 | Self-aligning valve assembly The self-aligning valve assembly facilitates proper seating of an engine exhaust valve even though the valve seat is distorted or tilted due to temperature gradients. The valve assembly includes a guide member having a flat surface that slides across a fl... | 05/24/1994 |
| 5293848 | Spring retainer for a poppet valve and method of assembling A spring retainer (10) for a poppet valve (18) which is biased by a valve spring (16) and a method of assembling the spring retainer (10) the poppet valve (18) and a valve spring (16). The spring retainer (10) has first and second body portions (30, 32). ... | 03/15/1994 |
| 5275376 | Spring retainer A spring retainer for a poppet valve having a valve stem and a groove in the valve stem. The poppet valve is biased by a valve spring. The spring retainer includes a one-piece annular body having an opening through which the valve stem extends. The body h... | 01/04/1994 |
