A rotary combustion engine system is provided with compression unit and expansions unit offset which communicate through a transfer port. Each unit defines a toroidal chamber extending annularly about a central cavity, and a plurality of curved pistons displaced within the toroidal chamber to variably form a plurality of sub-chambers therein. A rotor member in each unit is eccentrically coupled to a mechanical member and linked by a plurality of swing rod members to the curved pistons. The curved pistons of the expansion unit are advanced by recursive combustion within sub-chambers defined therebetween, to drive angular displacement of the rotor member. The rotor member in the compression unit is angularly displaced with the mechanical member to incrementally advance the unit's curved pistons for recursive compression of air within sub-chambers defined therebetween. The compressed air is recursively passed through the transfer port to the sub-chambers of the expansion unit for combustion.

A rotary actuator and a method of using same are disclosed. The rotary actuator includes a rotor having a body and defining a plurality of contact surfaces, and a stator having a body and defining a plurality of inflatable bladders circumferentially spaced about the stator body. The stator is positioned relative to the rotor such that upon sequential inflation of the plurality of inflatable bladders, the rotor is caused to rotate.

A vane pump includes: a rotor; vanes; a cam ring; pump chambers; a suction port; a discharge port; back-pressure chambers; a discharge-side back pressure port configured to guide working fluid that is discharged from the discharge port to the back-pressure chambers; and suction-side back pressure ports configured to guide the working fluid to the back-pressure chambers. The suction-side back pressure ports are formed to be divided into a low-pressure port and a high-pressure port, the low-pressure port being configured to guide the working fluid in the suction port to the back-pressure chambers, and the high-pressure port being configured to guide the working fluid that is discharged from the discharge port to the back-pressure chambers. The high-pressure port is arranged at the forward-side of the low-pressure port in rotating direction of the rotor.

A vane pump includes a first cam ring and a second cam ring, a first rotor positioned in the first cam ring and a second rotor positioned in the second cam ring, and a shaft. The first rotor is engaged with the shaft so that the first rotor rotates relative to the first cam ring about an axis extending through the shaft, and the second rotor selectively engages with the shaft so that the second rotor selectively rotates relative to the second cam ring about the axis. A piston positioned in the shaft translates within the shaft between a first position and a second position. When in the first position, the shaft engages with the second rotor so that the second rotor rotates relative to the second cam ring about the axis, and when in the second position, the shaft disengages with the second rotor so that the second rotor does not rotate relative to the second cam ring.

A rotor for a Wankel engine including a plurality of ribs extending from a bearing support to each one of the flanks, the plurality of ribs including, for each flank, first and second ribs connected to the flank between the recess and a respective one of the apex portions. The first and second ribs are curved along at least a portion thereof, and/or the first and second ribs are closest to the respective apex portion and connected to the flank adjacent a junction between a portion of the flank defining the recess and a respective portion of the flank connected thereto. A method of reducing pinching of apex seals in a rotor of a Wankel engine is also discussed.

A rotor for a Wankel engine including a plurality of ribs extending from a bearing support to each one of the flanks, the plurality of ribs including, for each flank, first and second ribs connected to the flank between the recess and a respective one of the apex portions. The first and second ribs are curved along at least a portion thereof, and/or the first and second ribs are closest to the respective apex portion and connected to the flank adjacent a junction between a portion of the flank defining the recess and a respective portion of the flank connected thereto. A method of reducing pinching of apex seals in a rotor of a Wankel engine is also discussed.

An exemplary embodiment of the present disclosure provides an intake device including: an annular flow path which is formed in a circular housing; an inlet part which is installed at one side of the housing and guides an inflow of a fluid into the flow path; a outlet part which is installed at the other side of the housing and guides a discharge of the fluid which flows into the inlet part and passes through the flow path; a piston which is disposed in the flow path, and rotates along the flow path so as to compress the fluid introduced through the inlet part; and an opening and closing unit which is installed in the flow path between the inlet part and the outlet part, includes a plurality of opening and closing members, and elastic members which are installed between the plurality of opening and closing members and the flow path so as to support the plurality of opening and closing members, respectively, and opens and closes the flow path by pressing the piston, in which when the pressing of the piston is released, the plurality of opening and closing members closes the flow path by pressing force of the fluid which presses outer circumferential surfaces of the plurality of opening and closing members in a direction in which the flow path is closed, and by elastic force of the elastic member.

The invention relates to a rotary drive for a drum in a winch on a support frame, which has a fluid-operated rotary piston motor that has a housing and a shaft. There are reversible freewheel couplings in a force-transfer path between the motor housing and the support frame and in a force-transfer path between the motor housing and the drum with which the motor housing can be connected to the support frame and the drum for transfer of forces. There are reversible freewheel couplings in a force-transfer path between the shaft and the support frame and in a force-transfer path between the shaft and the drum with which the shaft can be connected to the support frame and the drum for transfer of forces.

The invention relates to a rotary drive for a drum in a winch on a support frame, which has a fluid-operated rotary piston motor that has a housing and a shaft. There are reversible freewheel couplings in a force-transfer path between the motor housing and the support frame and in a force-transfer path between the motor housing and the drum with which the motor housing can be connected to the support frame and the drum for transfer of forces. There are reversible freewheel couplings in a force-transfer path between the shaft and the support frame and in a force-transfer path between the shaft and the drum with which the shaft can be connected to the support frame and the drum for transfer of forces.

The invention includes engines adapted for using apparatuses and methods for instantiating chemical reactants in a nanoporous carbon powder, and further includes methods of use for such engines.