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| Number | Title | Issue Date |
| 7210429 | Rotating positive displacement engine An engine including a stationary housing; a cylinder bank rotatably mounted to the housing about a central longitudinal axis, the cylinder bank having a plurality of cylinders therein radially distanced from and parallel to the central longitudinal axis, each cylind... | 05/01/2007 |
| 7117828 | Axial motors An axial motor (100) driven by opposed pistons/cylinder (101a–105b, 111a–115b) pairs arranged in a circular array about a central axis of the motor (100). The opposed pistons (101a | 10/10/2006 |
| 6938589 | Variable displacement engine An internal combustion engine having at least one piston with an adjustable stroke length. The engine includes a connecting rod attached to the piston and a crankshaft. The crankshaft has a journal portion that extends along a length that is non-perpendicular to a m... | 09/06/2005 |
| 6279520 | Adiabatic, two-stroke cycle engine having novel scavenge compressor arrangement An engine structure and mechanism that operates on various combustion processes in a two-stroke-cycle without supplemental cooling or lubrication comprises an axial assembly of cylindrical modules and twin, double-harmonic cams that operate with opposed p... | 08/28/2001 |
| 6098578 | Internal combustion engine with improved gas exchange An internal combustion engine of the opposed piston type valved by the passage of the pistons beyond inlet and outlet ports at opposite ends of the cylinders. The motion transmitting mechanisms for the opposed pistons are operable to move the opposed pist... | 08/08/2000 |
| 5749337 | Barrel type internal combustion engine A barrel type engine with two-stroke cycle of operation. The engine of the present invention comprises two engine halves, each half having a plurality of pumping cylinders and a matching number of power cylinders. Double-ended pistons impart rotational mo... | 05/12/1998 |
| 5269193 | Swash plate mechanism A swash plate mechanism, for coverting linear motion into notary motion and vice versa is disclosed, which overcomes the main difficulties with older arrangements of swash plate drives. These are the high friction of most drives or the high complexity of ... | 12/14/1993 |
| 5027756 | Nutating spider crank reciprocating piston machine A reciprocating piston machine in the form of a barrel engine has angularly-spaced pistons directly centrally linked by wrist pins to radially extending branches of a spider obliquely journalled for nonrotational nutation on a Z-crank portion of a rotatio... | 07/02/1991 |
| 4886024 | Rotary piston engine A rotary piston engine energizable by internal combustion having an engine assembly whereby expansion of gas for driving the engine occurs on the outer circumference of at least one rotary disc element in the engine assembly and generated power is taken a... | 12/12/1989 |
| 4515113 | Swash plate engine The swash plate engine is provided with an Aspin type rotary valve system with a variable compression capability. The engine may be of four-piston type or six-piston type. The size of the combustion chambers can be changed from time to time to vary the co... | 05/07/1985 |
| 4448154 | Internal combustion engine The engine is of the continuous combustion type having two multiple piston banks separated by a centrally disposed undulating spider drive member operated from the piston action and adapted to drive the output power shaft of the engine. The engine compris... | 05/15/1984 |
| 4313404 | Internal combustion engine The engine is of the continuous combustion type having two multiple piston banks separated by a centrally disposed undulating spider drive member operated from the piston action and adapted to drive the output power shaft of the engine. The engine compris... | 02/02/1982 |
| 4203396 | Barrel engine with rocking ball drive A reciprocating engine having multiple pistons coupled to a ball drive element which is retained in a spherical bearing seat and moves with a rocking motion about plural intersecting axes. Drive pins projecting from the ball element move in conical paths ... | 05/20/1980 |
| 4166398 | Multi-cylinder machines A multi-cylinder machine comprises a plurality of cylinders arranged in a casing symmetrically around an axis of rotation with the axes of the cylinders lying parallel to the axis of rotation. Pistons of the cylinders are connected to a common motion tran... | 09/04/1979 |
