Issued Patents All Time
Showing 26–50 of 62 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 5832884 | Device and method for operating a valve drive of an internal combustion engine | Michael Haas | 1998-11-10 |
| 5829400 | Valve gear for an internal combustion engine | Michael Haas | 1998-11-03 |
| 5787850 | Hydraulic clearance compensation element | Dieter Schmidt | 1998-08-04 |
| 5782216 | Engageable tappet for a valve drive of an internal combustion engine | Michael Haas, Gerhard Maas, Birger Wollboldt | 1998-07-21 |
| 5778839 | Finger lever for actuating a gas exchange valve | — | 1998-07-14 |
| 5746165 | Valve drive of an internal combustion engine | Gerhard Maas | 1998-05-05 |
| 5727509 | Cam follower in the form of a tappet or a lever having a hydraulic valve clearance compensation element | — | 1998-03-17 |
| 5669342 | Device for simultaneous actuation of at least two gas exchange valves | — | 1997-09-23 |
| 5636604 | Tappet for a valve drive of an internal combustion engine | — | 1997-06-10 |
| 5622146 | Finger lever for actuating gas exchange valves | — | 1997-04-22 |
| 5595149 | Method of first filling of a hydraulic valve actuating device | Dieter Schmidt | 1997-01-21 |
| 5586528 | Tappet for the valve drive of an internal combustion engine | — | 1996-12-24 |
| 5503121 | Oil supply for a valve actuation device | Arndt Ihlemann, Johann Kecker | 1996-04-02 |
| 5501187 | Connection of a guide rail of a valve actuation device with a camshaft bearing | Arndt Ihlemann, Johann Kecker | 1996-03-26 |
| 5450826 | Tappet for the valve drive of an internal combustion engine | — | 1995-09-19 |
| 5408959 | Tappet with hydraulic valve clearance compensation and floating piston | — | 1995-04-25 |
| 5365897 | Mechanical valve tappet | Dieter Schmidt, Michael Zipprath | 1994-11-22 |
| 5267538 | Mechanical valve tappet for an internal combustion engine | Dieter Schmidt, Michael Zipprath | 1993-12-07 |
| 5261361 | Assembly for simultaneously actuating two valves of an internal combustion engine | — | 1993-11-16 |
| 5117787 | Self-adjusting hydraulic valve tappet | — | 1992-06-02 |
| 5078657 | Belt tensioner | Dieter Schmidt | 1992-01-07 |
| 4924825 | Outer guide means for a valve tappet | — | 1990-05-15 |
| 4876994 | Hydraulic play compensation element | Bolko Schuseil, Dieter Schmidt | 1989-10-31 |
| 4864982 | Inner element for an hydraulic valve play compensation element | — | 1989-09-12 |
| 4856468 | Ball-and-socket joint | Dieter Schmidt, Michael Zipprath | 1989-08-15 |