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Class Information
Number: 123/90.14
Name: Internal-combustion engines > Poppet valve operating mechanism > Pneumatic system
Description: Device wherein positive or negative pressure of a gas provides the source of power for at least one direction of movement of the valve.
Patents under this class:
| Patent Number |
Title Of Patent |
Date Issued |
| 7472669 |
Method of generating pressure pulses, a pressure pulse generator and a piston engine provided therewith |
Jan. 6, 2009 |
| 7249580 |
Valve return device, and an engine equipped with such a device |
Jul. 31, 2007 |
| 7225771 |
Method and device for pressure pulse generation |
Jun. 5, 2007 |
| 7204212 |
Camless engine hydraulic valve actuated system |
Apr. 17, 2007 |
| 7140332 |
Pneumatically actuated valve for internal combustion engines |
Nov. 28, 2006 |
| 7044433 |
Valve spring mechanism |
May. 16, 2006 |
| 6899068 |
Hydraulic valve actuation system |
May. 31, 2005 |
| 6871618 |
Valve actuating device, and method for controlling same |
Mar. 29, 2005 |
| 6779496 |
Pressure reservoir for exerting pressure on a hydraulic system, with which preferably a gas exchange valve of an internal combustion engine is actuated |
Aug. 24, 2004 |
| 6776129 |
Hydraulic actuator for a gas exchange valve |
Aug. 17, 2004 |
| 6755162 |
Distributed accumulator for hydraulic camless valve actuation system |
Jun. 29, 2004 |
| 6752106 |
Pressure pulse generator |
Jun. 22, 2004 |
| 6745738 |
Pneumatic valve return spring |
Jun. 8, 2004 |
| 6715465 |
Internal combustion engine with valve control |
Apr. 6, 2004 |
| 6619246 |
Electromagnetic valve actuators |
Sep. 16, 2003 |
| 6615779 |
Control of an electromagnetic steering valve of a camshaft phaser |
Sep. 9, 2003 |
| 6553966 |
Method of presetting an internal combustion engine |
Apr. 29, 2003 |
| 6536388 |
Variable engine valve control system |
Mar. 25, 2003 |
| 6534170 |
Diamond-coated sliding part |
Mar. 18, 2003 |
| 6340009 |
Internal combustion engine |
Jan. 22, 2002 |
| 6182620 |
Internal combustion engine with electromagnetically actuated valves |
Feb. 6, 2001 |
| 6083140 |
Pneumatic valve spring system having a single air compressor to also supply air actuated accessories |
Jul. 4, 2000 |
| 5988124 |
Electromagnetically actuated cylinder valve having pneumatic resetting springs |
Nov. 23, 1999 |
| 5943988 |
Operating arrangement for a gas change valve of an internal engine combustion engine |
Aug. 31, 1999 |
| 5832885 |
Hybrid internal combustion engine |
Nov. 10, 1998 |
| 5752477 |
Two-stroke engine with valve motion control means |
May. 19, 1998 |
| 5713315 |
Multiple step valve opening control system |
Feb. 3, 1998 |
| 5664527 |
Pneumatic valve recoil system for internal combustion engines |
Sep. 9, 1997 |
| 5611303 |
Valve operating apparatus of internal combustion engine |
Mar. 18, 1997 |
| 5555859 |
Internal combustion engines |
Sep. 17, 1996 |
| 5553572 |
Multi-valve engine |
Sep. 10, 1996 |
| 5363651 |
Free piston internal combustion engine |
Nov. 15, 1994 |
| 5277222 |
Pressure actuatable valve assembly |
Jan. 11, 1994 |
| 5259345 |
Pneumatically powered actuator with hydraulic latching |
Nov. 9, 1993 |
| 5253619 |
Hydraulically powered actuator with pneumatic spring and hydraulic latching |
Oct. 19, 1993 |
| 5233950 |
Valve operating system for internal combustion engine |
Aug. 10, 1993 |
| 5193495 |
Internal combustion engine valve control device |
Mar. 16, 1993 |
| 5152260 |
Highly efficient pneumatically powered hydraulically latched actuator |
Oct. 6, 1992 |
| 5109812 |
Pneumatic preloaded actuator |
May. 5, 1992 |
| 5022358 |
Low energy hydraulic actuator |
Jun. 11, 1991 |
| 5022359 |
Actuator with energy recovery return |
Jun. 11, 1991 |
| 5005537 |
Method and device for introducing a carburetted mixture under pressure in a chamber of a two-stroke engine |
Apr. 9, 1991 |
| 5003938 |
Pneumatically powered valve actuator |
Apr. 2, 1991 |
| 4995350 |
2-cycle uni-flow spark-ignition engine |
Feb. 26, 1991 |
| 4991548 |
Compact valve actuator |
Feb. 12, 1991 |
| 4967702 |
Fast acting valve |
Nov. 6, 1990 |
| 4942852 |
Electro-pneumatic actuator |
Jul. 24, 1990 |
| 4915015 |
Pneumatic actuator |
Apr. 10, 1990 |
| 4899700 |
Pneumatically powered valve actuator |
Feb. 13, 1990 |
| 4878464 |
Pneumatic bistable electronic valve actuator |
Nov. 7, 1989 |
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