| Patents for F01L 1 - Valve-gear or valve arrangements, e.g. lift-valve gear (30,520) |
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| 04/18/1989 | US4821693 Camshaft for an internal combustion engine |
| 04/18/1989 | US4821689 Valve drive with a hydraulic transmission and a characteristic variable by means of a link control |
| 04/12/1989 | EP0311282A2 Valve mechanisms |
| 04/12/1989 | CN1003880B Four stroke internal combustion engine |
| 04/11/1989 | US4819591 Poppet valve assemblies |
| 04/06/1989 | WO1989002997A1 Camshafts and methods of making same |
| 04/06/1989 | WO1989002975A1 Hydraulic engine valve lifter assembly |
| 04/05/1989 | EP0309899A1 Motor shaft with mounted groups of drive units |
| 03/30/1989 | DE3730001A1 Valve actuating mechanism for an internal combustion engine |
| 03/28/1989 | US4815425 Diaphragm seal for a valve tappet |
| 03/28/1989 | US4815424 Hydraulic lash adjuster |
| 03/28/1989 | US4815422 Four stroke piston engine |
| 03/28/1989 | US4815275 Combustion engine with exterior combustion chamber |
| 03/28/1989 | CA1251702A1 Boat-type rocker arm assembly |
| 03/23/1989 | WO1989002518A1 Exhaust control valve for two-stroke cycle engines and process for using the same |
| 03/21/1989 | US4813408 Engine cooling device |
| 03/14/1989 | US4811705 Horizontal-shaft OHV engine |
| 03/14/1989 | US4811699 Speed reduction device |
| 03/14/1989 | US4811698 Valve timing adjusting mechanism for internal combustion engine for adjusting timing of intake valve and/or exhaust valve corresponding to engine operating conditions |
| 03/08/1989 | EP0305693A1 A rocker arm |
| 03/07/1989 | US4809663 High performance internal combustion engine |
| 03/07/1989 | US4809651 Valve tappet apparatus |
| 03/07/1989 | US4809562 Camshaft manufacture |
| 02/28/1989 | US4807576 Hydraulic lash adjuster for use in valve operating mechanism |
| 02/28/1989 | US4807575 Hydraulic lash adjuster with multi-directional check valve |
| 02/28/1989 | US4807574 Valve operating device for internal combustion engine |
| 02/23/1989 | WO1989001581A1 Hollow shaft and process for its manufacture |
| 02/23/1989 | WO1989001565A1 Poppet valve assembly with apertures |
| 02/23/1989 | DE3727057A1 Hollow shaft and method for its manufacture |
| 02/22/1989 | EP0303845A1 Hollow shaft and process for producing it |
| 02/21/1989 | US4806040 Ceramic ball and socket joint |
| 02/21/1989 | US4805571 Internal combustion engine |
| 02/21/1989 | US4805568 Swing valve for internal combustion engines |
| 02/21/1989 | US4805567 Valve mechanism for at least two simultaneously actuable valves |
| 02/21/1989 | US4805566 Arrangement for influencing the control times of valves |
| 02/21/1989 | US4805565 Structure of cam shaft for engine |
| 02/16/1989 | DE3726052A1 Valve timing gear for compressors, engines etc. |
| 02/14/1989 | US4803766 Mounting of ceramic tip on metal rocker arm |
| 02/09/1989 | DE3743210A1 Valve-actuating device |
| 02/09/1989 | DE3725458A1 Control device for inlet/exhaust valves of an internal combustion engine |
| 02/09/1989 | DE3725417A1 Valve timing gear for varying the valve opening time |
| 02/07/1989 | US4802883 Method of and apparatus for adjusting tension of timing belt |
| 02/07/1989 | US4802448 Cup tappet with hydraulic play compensation device |
| 02/07/1989 | US4802376 Variable phase and oscillatory drives |
| 02/07/1989 | CA1249753A1 Engine camshaft drive mechanism |
| 02/02/1989 | DE3724495A1 Valve-timed four-stroke reciprocating piston internal combustion engine with applied ignition |
| 02/02/1989 | DE3724494A1 Liquid-cooled cylinder head for an internal combustion engine |
| 02/01/1989 | EP0301267A1 Ball joint placed between a rocker arm and a valve shaft in an internal-combustion engine |
| 01/31/1989 | US4800851 Hydraulic play compensating element |
| 01/31/1989 | US4800850 Hydraulic circuit for a valve operating mechanism for an internal combustion engine |
| 01/25/1989 | EP0300679A1 Valve operating device for internal combustion engine |
| 01/25/1989 | CN2031445U Engine rocker |
| 01/24/1989 | US4799464 Boat-type rocker arm assembly |
| 01/24/1989 | US4799463 Valve operating mechanism for internal combustion engines |
| 01/19/1989 | DE3722844A1 Bucket tappet for the hydraulic valve timing gear of an internal combustion engine |
| 01/18/1989 | CN1030376A Roundness processing method and its device for slipper surface of rocker arm |
| 01/17/1989 | US4798180 Self-contained hydraulic lash adjuster |
| 01/17/1989 | US4798179 Hydraulic oil for use in sealed-type, lash adjusters |
| 01/12/1989 | DE3821617A1 Through-scavenging engine with rotary valve, and separate scavenging and charging |
| 01/12/1989 | DE3722065A1 Synchronous belt drive in an internal combustion engine |
| 01/12/1989 | DE3721677A1 Cup tappet with hydraulic tappet clearance compensation, and method for manufacturing it |
| 01/10/1989 | US4796576 Adjustment mechanism for ceramic rocker arm |
| 01/10/1989 | US4796575 Wear resistant slide member made of iron-base sintered alloy |
| 01/10/1989 | US4796574 SOHC type internal combustion engine |
| 01/10/1989 | US4796573 Hydraulic engine valve lifter assembly |
| 01/10/1989 | US4796483 Cold-formed rocker arm with cam-contacting roller |
| 01/05/1989 | DE3819927A1 Hydraulic valve clearance adjusting element |
| 01/05/1989 | DE3741511A1 Cylinder head with a common gas-reversing valve for the inlet and outlet of an internal combustion engine |
| 01/04/1989 | EP0297791A1 Valve operation control device for internal combustion engine |
| 01/04/1989 | EP0297263A1 A pre-assembled drive transmission device for transmitting drive between parallel axes |
| 01/03/1989 | US4794894 Ceramic tipped pivot rod and method for its manufacture |
| 01/03/1989 | US4794893 Engine valve driving apparatus |
| 01/03/1989 | US4794892 Hydraulic circuit for valve operation timing changing device for internal combustion engine |
| 01/03/1989 | US4794890 Electromagnetic valve actuator |
| 12/29/1988 | WO1988010384A1 Power transmission system using toothed belt |
| 12/29/1988 | DE3733441C1 Non-return valve device in the intake port of a quantity-controlled internal combustion engine |
| 12/28/1988 | EP0296885A1 Valve timing control device for use in internal combustion engine |
| 12/28/1988 | EP0296291A2 Slide assembly and valve assembly |
| 12/28/1988 | CA1247482A Apparatus for cooling cylinder head of an engine |
| 12/27/1988 | US4793347 Exhaust timing control device for two cycle engines |
| 12/27/1988 | US4793307 Rocker arm decoupler for two-cycle engine retarder |
| 12/27/1988 | US4793297 Valve operating mechanism for internal combustion engine |
| 12/27/1988 | US4793296 Valve operating mechanism for internal combustion engine |
| 12/27/1988 | US4793295 Retainer for a hydraulic lash adjuster |
| 12/22/1988 | DE3718334A1 Device for varying the valve timing in reciprocating piston engines |
| 12/21/1988 | EP0295281A1 Mounting process and device for manufactured camshafts. |
| 12/20/1988 | US4791895 Electro-magnetic-hydraulic valve drive for internal combustion engines |
| 12/20/1988 | US4791893 Valve train arrangement for multi-valve engine |
| 12/14/1988 | EP0294682A1 Rocker arm decoupler |
| 12/14/1988 | EP0294559A1 Chain tensioner |
| 12/14/1988 | CN88103053A Hollow shaft fixing drive element with axially different property of stoff to it by expanding itself |
| 12/13/1988 | US4790473 Plating nickel alloy onto steel base before welding yields austenitic zone; impact strength, ductility |
| 12/13/1988 | US4790274 Valve operating mechanism for internal combustion engine |
| 12/08/1988 | DE3718107A1 Valve operating mechanism for internal combustion engines |
| 12/07/1988 | CN88103203A Hollow shaft made of material with low elasticity modulus |
| 12/06/1988 | US4788947 Cap retainer for hydraulic lash adjuster |
| 12/06/1988 | US4788946 Valve operating mechanism for internal combustion engine |
| 12/01/1988 | DE3814835A1 Internal combustion engine with at least two inlet valves per combustion chamber |
| 12/01/1988 | DE3716505A1 Method for Reducing the Wear of the Control Devices in Internal-Combustion Engines and Device for carrying out the Method |
| 11/30/1988 | EP0293278A1 Multi-valve cylinder head for an internal-combustion engine |