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Class Information
Number: 123/90.55
Name: Internal-combustion engines > Poppet valve operating mechanism > Tappet > Lash adjustment > Self-operating > Hydraulic
Description: Device wherein the self-operating adjusting means is of the reciprocating hydraulic chamber type.
Sub-classes under this class:
Patents under this class:
| Patent Number |
Title Of Patent |
Date Issued |
| 7455040 |
Hydraulic circuit for switchable cam followers |
Nov. 25, 2008 |
| 7431001 |
Rail used as a torsional stop for the valve train of an internal combustion engine, and roller tappet arrangement |
Oct. 7, 2008 |
| 7421994 |
Hydraulic lash adjuster having a check valve cartridge sub-assembly |
Sep. 9, 2008 |
| 7409941 |
Valve-deactivating hydraulic lifter having a vented internal lost motion spring |
Aug. 12, 2008 |
| 7395792 |
Deactivation roller hydraulic valve lifter |
Jul. 8, 2008 |
| 7380531 |
Variable valve drive for changing the control timing of cam-actuated gas-exchange valves |
Jun. 3, 2008 |
| 7350492 |
Guide gib for the valve operating mechanism of an internal combustion engine |
Apr. 1, 2008 |
| 7328676 |
Hydraulic valve play compensation element |
Feb. 12, 2008 |
| 7322329 |
Assembly process for hydraulic valve lifters to reduce variation in valve lift |
Jan. 29, 2008 |
| 7308879 |
Deactivation roller hydraulic valve lifter |
Dec. 18, 2007 |
| 7299778 |
Switchable cam follower |
Nov. 27, 2007 |
| 7296548 |
Deactivation roller hydraulic valve lifter |
Nov. 20, 2007 |
| 7273026 |
Roller follower body |
Sep. 25, 2007 |
| 7261075 |
Hydraulic support element |
Aug. 28, 2007 |
| 7246589 |
Valve train of an internal combustion engine comprising a tappet and a tappet pushrod |
Jul. 24, 2007 |
| 7246585 |
Valve-deactivating hydraulic lifter having a vented internal lost motion spring |
Jul. 24, 2007 |
| 7246590 |
Valve train of an internal combustion engine comprising a tappet and a tappet pushrod |
Jul. 24, 2007 |
| 7246584 |
Force-transmitting arrangement for a valve train of an internal-combustion engine |
Jul. 24, 2007 |
| 7243629 |
Hydraulic valve lifter assembly |
Jul. 17, 2007 |
| 7219639 |
Drag lever of a valve mechanism in an internal combustion engine |
May. 22, 2007 |
| 7210438 |
Internal combustion engine having valves with variable actuation each provided with a hydraulic tappet at the outside of the associated actuating unit |
May. 1, 2007 |
| 7210439 |
Switching element for a valve train of an internal combustion engine |
May. 1, 2007 |
| 7207303 |
Switching element |
Apr. 24, 2007 |
| 7146955 |
Hydraulic tappet clearance compensation device |
Dec. 12, 2006 |
| 7146954 |
Hydraulic valve-lash-adjusting element |
Dec. 12, 2006 |
| 7146953 |
Mechanical valve play compensation element for a valve drive on a piston combustion engine |
Dec. 12, 2006 |
| 7140336 |
Internal combustion engine with valves with variable actuation which are driven by a single pumping piston and controlled by a single solenoid valve for each engine cylinder |
Nov. 28, 2006 |
| 7137374 |
Adjustable hydraulic valve lifter |
Nov. 21, 2006 |
| 7131411 |
Adjustable fast bleed lifter |
Nov. 7, 2006 |
| 7117833 |
Readily-fillable hydraulic valve lifter assembly |
Oct. 10, 2006 |
| 7104232 |
Deactivation roller hydraulic valve lifter |
Sep. 12, 2006 |
| 7089900 |
Hydraulic lash adjuster and improved method of assembly thereof |
Aug. 15, 2006 |
| 7069888 |
System and method for valve actuation |
Jul. 4, 2006 |
| 7059287 |
Switched cam follower or switched support element of a valve gear of an internal combustion engine |
Jun. 13, 2006 |
| 7059284 |
Internal combustion engine having valves with variable actuation and hydraulic actuating units which control the valves by means of rocker arms |
Jun. 13, 2006 |
| 7055479 |
Coupling mechanism |
Jun. 6, 2006 |
| 7044095 |
Roller tappet with cold advance |
May. 16, 2006 |
| 7036481 |
Switching element for a valve drive of an internal combustion engine |
May. 2, 2006 |
| 7036465 |
Two-stroke and four-stroke switching mechanism |
May. 2, 2006 |
| 6990935 |
Pivoting lifter control system using spool valve and check valve to recirculate oil |
Jan. 31, 2006 |
| 6981476 |
Internal combustion engine with a single camshaft which controls exhaust valves mechanically and intake valves through an electronically controlled hydraulic device |
Jan. 3, 2006 |
| 6964252 |
Valve lifter for internal combustion engine |
Nov. 15, 2005 |
| 6953016 |
Tappet in a valve train of an internal combustion engine |
Oct. 11, 2005 |
| 6935286 |
Connection between a stem end on a gas exchange valve in an internal combustion engine and a sleeve-like actuator body of a valve actuator |
Aug. 30, 2005 |
| 6920857 |
Deactivation hydraulic valve lifter having a pressurized oil groove |
Jul. 26, 2005 |
| 6918364 |
Multicylinder engine with valve variable actuation, and an improved valve braking device therefor |
Jul. 19, 2005 |
| 6901893 |
Valve deactivator assembly |
Jun. 7, 2005 |
| 6880507 |
Internal combustion engine with switchable cam follower |
Apr. 19, 2005 |
| 6834628 |
Mechanical valve play compensation element for a valve drive on a piston combustion engine |
Dec. 28, 2004 |
| 6814040 |
Deactivation roller hydraulic valve lifter |
Nov. 9, 2004 |
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