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Class Information
Number: 123/90.57
Name: Internal-combustion engines > Poppet valve operating mechanism > Tappet > Lash adjustment > Self-operating > Hydraulic > Vent or bleed means for pressure chamber
Description: Device wherein the reciprocating hydraulic adjusting means has a fluid vent from its pressure chamber.
Patents under this class:
| Patent Number |
Title Of Patent |
Date Issued |
| 7458352 |
Switchable valve drive element of an internal combustion engine |
Dec. 2, 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 |
| 7392819 |
Method of setting the ball travel of a valve-lash-adjusting element |
Jul. 1, 2008 |
| 7131411 |
Adjustable fast bleed lifter |
Nov. 7, 2006 |
| 7117833 |
Readily-fillable hydraulic valve lifter assembly |
Oct. 10, 2006 |
| 6920857 |
Deactivation hydraulic valve lifter having a pressurized oil groove |
Jul. 26, 2005 |
| 6901328 |
Method and arrangement for detecting the end of a start operation in an internal combustion engine of a motor vehicle |
May. 31, 2005 |
| 6805085 |
Hydraulic system for an internal combustion engine |
Oct. 19, 2004 |
| 6802288 |
Deactivation hydraulic valve lifter having a pressurized oil groove |
Oct. 12, 2004 |
| 6769385 |
System for controlling engine valve seating velocity |
Aug. 3, 2004 |
| 6748914 |
Refillable metering valve for hydraulic valve lifters |
Jun. 15, 2004 |
| 6718923 |
Hydraulic play compensation element for a valve gear of an internal combustion engine |
Apr. 13, 2004 |
| 6712030 |
Internal-combustion engine with hydraulic system for variable operation of the engine valves |
Mar. 30, 2004 |
| 6619252 |
Switchable tappet for the direct transmission of a cam lift to a tappet push rod |
Sep. 16, 2003 |
| 6584942 |
Cylinder deactivation apparatus with vapor purge |
Jul. 1, 2003 |
| 6536391 |
Compact hydraulic lash adjuster |
Mar. 25, 2003 |
| 6523510 |
Valve drive mechanism for engine |
Feb. 25, 2003 |
| 6520130 |
Internal-combustion engine with hydraulic system for variable operation of the valves and with means for bleeding the hydraulic system |
Feb. 18, 2003 |
| 6318323 |
Tappet for a valve mechanism of an internal combustion engine |
Nov. 20, 2001 |
| 6318322 |
Valve drive of an internal combustion engine |
Nov. 20, 2001 |
| 6039018 |
Hydraulic lash adjuster with plunger inner control ring |
Mar. 21, 2000 |
| 6006710 |
Hydraulic lash adjuster mechanism with pressure controlled leak down |
Dec. 28, 1999 |
| 5967105 |
Hydraulic lash adjuster with an open ended top plunger surface |
Oct. 19, 1999 |
| 5964193 |
Synchronous hydraulic lash adjuster |
Oct. 12, 1999 |
| 5931132 |
Hydraulic lash adjuster with pressure relief check valve |
Aug. 3, 1999 |
| 5862784 |
Hydraulic lash adjuster and check valve opening arrangement therefor |
Jan. 26, 1999 |
| 5860399 |
Hydraulic clearance compensation element |
Jan. 19, 1999 |
| 5787850 |
Hydraulic clearance compensation element |
Aug. 4, 1998 |
| 5749340 |
Hydraulic tappets |
May. 12, 1998 |
| 5623898 |
Variable duration hydraulic valve lifters |
Apr. 29, 1997 |
| 5245958 |
Direct acting hydraulic valve lifter |
Sep. 21, 1993 |
| 5241927 |
Internal combustion engine with different exhaust and intake valve operating characteristics |
Sep. 7, 1993 |
| 5018488 |
Hydraulic tappets |
May. 28, 1991 |
| 4977867 |
Self-adjusting variable duration hydraulic lifter |
Dec. 18, 1990 |
| 4889085 |
Valve operating device for internal combustion engine |
Dec. 26, 1989 |
| 4807576 |
Hydraulic lash adjuster for use in valve operating mechanism |
Feb. 28, 1989 |
| 4765288 |
Valve control arrangement |
Aug. 23, 1988 |
| 4741298 |
Rollerized timing lifter |
May. 3, 1988 |
| 4721076 |
Self-adjusting hydraulic valve tappet |
Jan. 26, 1988 |
| 4646690 |
Overhead camshaft engine valve train with slack take up means |
Mar. 3, 1987 |
| 4616607 |
Valve driving device for internal combustion engine |
Oct. 14, 1986 |
| 4601268 |
Variable two-way bleed valve |
Jul. 22, 1986 |
| 4524731 |
Hydraulic valve lifter with continuous void |
Jun. 25, 1985 |
| 4523551 |
Valve actuating device |
Jun. 18, 1985 |
| 4509467 |
Hydraulic lifter system for variable cylinder engines |
Apr. 9, 1985 |
| 4475490 |
Hydraulic valve lifter |
Oct. 9, 1984 |
| 4466280 |
Hydraulic lifter train clearance control systems, elements and processes |
Aug. 21, 1984 |
| 4463714 |
Hydraulic lifter |
Aug. 7, 1984 |
| 4449489 |
Varying geometric compression ratio engine |
May. 22, 1984 |
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