| Patents for F01B 3 - Reciprocating-piston machines or engines with cylinder axes coaxial with, or parallel or inclined to, main shaft axis (2,319) |
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| 10/23/1991 | EP0453249A2 Barrel-type internal combustion engine |
| 09/24/1991 | CA1289413C Dual range pressure compensated rotary pump valve plate |
| 09/11/1991 | EP0445702A1 Variable displacement bent axis type hydraulic machine |
| 09/10/1991 | US5046403 Axial piston machine with swash plate construction |
| 09/10/1991 | US5046402 Rotary to axial motion converting device with groove in piston guide |
| 07/23/1991 | US5033358 Axial piston type motor |
| 07/16/1991 | US5031581 Crankless reciprocating machine |
| 07/09/1991 | US5029558 Rotary vee engine |
| 07/03/1991 | CN1013047B Power transmission |
| 07/02/1991 | US5027755 Wobble plate internal combustion engine |
| 06/26/1991 | EP0433730A1 Axial piston machine with swash plate |
| 06/11/1991 | US5022310 Fluid power transmission |
| 05/29/1991 | WO1991008377A1 Internal combustion engines |
| 05/21/1991 | US5016580 Cam drive diesel engine utilizing double acting pistons |
| 05/16/1991 | WO1991006760A1 Inclined-shaft axial piston machine |
| 05/14/1991 | US5014653 Rotary vee engine |
| 05/14/1991 | CA1284063C Adjustable axial piston engine |
| 05/08/1991 | DE3936812A1 Axialkolbenmaschine in schraegachsenbauweise Axial piston schraegachsenbauweise |
| 04/30/1991 | US5010733 Hydrostatic transmission with hydraulic bypass and air bleed |
| 04/23/1991 | US5009198 Rotary vee engine |
| 04/16/1991 | US5007385 Crankless engine |
| 03/27/1991 | EP0418289A1 Rotating spray apparatus |
| 03/27/1991 | CN1012198B Rotary piston and barrel machine with fixed centering toggle type joint |
| 03/20/1991 | EP0252105B1 Axial piston machine |
| 03/14/1991 | DE3929605A1 Pump used in vehicles suspension - transfers gas between containers and uses column of oil to adjust piston stroke |
| 03/07/1991 | WO1991002889A1 Piston machine |
| 03/07/1991 | DE3928478A1 Cone cam drive with integrated compression chambers - makes use of piston assembly running between two end cams |
| 03/05/1991 | US4996953 Two plus two stroke opposed piston heat engine |
| 02/19/1991 | US4994004 Electric actuator for swashplate |
| 01/31/1991 | DE4022858A1 Axial piston machine - with pistons running on cam track with two top and two bottom dead-centres |
| 01/23/1991 | EP0409084A2 Bent axis type variable displacement hydraulic machine |
| 01/22/1991 | US4986226 Internal combustion engine |
| 12/27/1990 | EP0159320B1 Internal combustion engine and operating cycle therefor |
| 12/25/1990 | US4979406 Cam with sinusoidal cam lobe surfaces |
| 12/13/1990 | WO1990015246A1 Bearing lubrication in axial piston fluid devices |
| 12/12/1990 | EP0330674B1 Internal-combustion engine |
| 12/11/1990 | US4976189 Motion translating device |
| 12/04/1990 | US4974555 Piston motor with parallel cylinders arranged around the driving shaft |
| 11/27/1990 | USRE33455 Swashplate assembly for a swashplate type hydraulic pressure device |
| 11/06/1990 | US4967703 Machine having rotary reciprocating piston |
| 10/11/1990 | DE3911128A1 Hydraulic axial piston machine |
| 10/02/1990 | US4960082 Rotary vee engine |
| 10/02/1990 | US4960007 Cam-helical actuator with backlash elimination |
| 09/26/1990 | CN1009748B Ratio valve to control unloading of modulating relief valve |
| 09/20/1990 | DE3908744A1 Piston engine with positively interlocking power-transmitting parts |
| 09/04/1990 | US4953426 Housing support for hydraulic displacement unit swashplate |
| 08/22/1990 | EP0383167A1 Axial piston engine |
| 08/14/1990 | CA1272663A2 Valve assembly |
| 08/09/1990 | WO1990008890A1 Improved sibling cycle piston and valving method |
| 07/26/1990 | DE3901810A1 Axial piston machine |
| 07/17/1990 | US4941395 Bent-axis hydraulic apparatus |
| 06/20/1990 | EP0373252A1 Axial piston unit and control device |
| 06/14/1990 | WO1990006425A1 Opposed-piston internal combustion engine |
| 06/12/1990 | US4932310 Bearing lubrication in axial piston fluid devices |
| 06/07/1990 | DE3843207A1 Internal combustion engine |
| 06/05/1990 | CA1269913A1 Ratio valve to control unloading of modulating relief valve |
| 05/31/1990 | WO1990005863A1 Motion transfer apparatus |
| 05/29/1990 | US4928576 Compressed gas motor |
| 05/23/1990 | EP0369991A1 Rotating and reciprocating piston engine |
| 05/23/1990 | EP0369990A1 Rotating and reciprocating piston engine |
| 05/22/1990 | US4926639 Sibling cycle piston and valving method |
| 05/22/1990 | CA1269303A1 Swashblock lubrication in axial piston fluid displacement devices |
| 04/19/1990 | WO1990004086A1 Cam-helical actuator with backlash elimination |
| 04/12/1990 | DE3831451A1 Internal combustion engine with irrotational pistons |
| 04/10/1990 | US4915064 Internal combustion engine with opposed pistons |
| 04/05/1990 | DE3832137A1 Adjustment of the "inlet closes" valve timing during the operation of axial flow rotary engines |
| 04/05/1990 | CA2000220A1 Cam-helical actuator with backlash elimination |
| 03/29/1990 | DE3832141A1 Roller bearing guide for the rotating pistons in axial flow rotary engines |
| 03/29/1990 | DE3832140A1 Mounting of the pistons for absorption of their centrifugal forces on axial flow rotary engines |
| 03/29/1990 | DE3832139A1 Hydrostatic bearing of the pistons for absorbing the centrifugal forces on axial flow rotary engines |
| 03/29/1990 | DE3832138A1 Piston roller bearing for absorption of the radial forces on axial flow rotary engines |
| 03/29/1990 | DE3832135A1 Compression adjustment in unilaterally acting axial flow rotary engines |
| 03/29/1990 | DE3832133A1 Charge stratification in axial flow rotary engines by utilising the intake flow and the centrifugal forces |
| 03/29/1990 | DE3832132A1 Wrapping of the pistons to absorb the radial forces on axial flow rotary engines |
| 03/27/1990 | US4911064 Piston and barrel machine with fixed centering toggle type joint |
| 03/08/1990 | WO1990002247A1 Wobble ball/plate engine mechanism |
| 03/07/1990 | EP0357291A2 Crankless reciprocating machine |
| 03/06/1990 | US4905637 Diesel aircraft engine--also convertible for other applications--optimized for high output, high supercharge and total energy utilization |
| 02/28/1990 | EP0204837B1 Swashplate centring device |
| 02/27/1990 | US4903577 Adjustable axial piston machine with a swash plate design |
| 02/27/1990 | US4903545 Hydrostatic transmission center section |
| 01/30/1990 | US4896585 Adjustable axial piston machine |
| 01/16/1990 | US4894045 Universal joint having driving pins parallel to one of coupled shafts and swingably and radially slidable to the other shaft |
| 01/02/1990 | US4890539 Control body arrangement for axial flow applyable in pumps, motors or engines |
| 12/26/1989 | US4888950 Magnetic driven hydrodynamic lubrication system for free piston stirling engine |
| 12/20/1989 | EP0233190B1 Fuel injection nozzle for internal combustion engines |
| 12/19/1989 | US4887558 Internal-combustion engine having opposed integral annular pistons and a central shaft |
| 12/14/1989 | WO1989011914A1 Rotating spray apparatus |
| 12/12/1989 | US4886024 Rotary piston engine |
| 11/23/1989 | DE3816136A1 Power unit for reciprocating piston machines or engines |
| 11/02/1989 | EP0339810A2 Compressed gas piston and cylinder set |
| 10/31/1989 | US4876850 Combustion engine for solid block fuel |
| 10/19/1989 | DE3811404A1 Engine and machine with a rotary and translatory piston |
| 09/27/1989 | EP0188462B1 A piston-operated machine |
| 09/26/1989 | CA1261711A1 Hydraulic displacements unit and method of assembly thereof |
| 09/19/1989 | US4867107 Rotary vee engine |
| 09/06/1989 | EP0330674A1 Internal-combustion engine. |
| 08/23/1989 | EP0328835A1 Central shaft internal combustion engine with annular, opposing and solidly joined pistons |
| 08/15/1989 | US4856917 Device for the synchronous guidance of a roller bearing cage for a roller bearing executing swivel motion |
| 08/09/1989 | EP0327352A2 Rotary vee engine |