Patent ID: 7765803

Claim:
A crankless reciprocating engine comprising: a first piston housing chamber partitioned into a first pressure chamber and a second pressure chamber by the first piston housed therein; a second piston housing chamber partitioned into a third pressure chamber and a fourth pressure chamber by the second piston housed therein; a communication channel for communicating between the second and fourth pressure chambers; a first rack reciprocating in engagement with the first piston; a second rack reciprocating in engagement with the second piston; a first pinion engaging with the first rack; a second pinion engaging with the second rack; a driveshaft supporting the first and second pinions, changing the two-way rotation of each pinion into a one-way rotation and transmitting the one-way rotation to a load; a cylindrical valve with at least four fluid channels passing through the curved surface of its circumference and freely rotating on its cylindrical shaft; and a power transmission unit for rotating the valve in one direction in engagement with the driveshaft, wherein when the valve is in its first rotational position, fluid is introduced into the first pressure chamber through the first fluid channel of the valve while simultaneously fluid is discharged from the third pressure chamber through the fourth fluid channel of the valve, and when the valve is in its second rotational position, fluid is introduced into the third pressure chamber through the third fluid channel of the valve, while simultaneously, fluid is discharged from the first pressure chamber through the second fluid channel of the valve.