An apparatus including a first piston member rotatable about a first rotational axis and a rotor with a first chamber and pivotable about a second rotational axis. The first piston member extends across the first chamber. The rotor and first piston member are rotatable around the first rotational axis, and the rotor is pivotable about the second rotational axis to permit a relative pivoting motion between the rotor and the first piston member linked to the rotor rotating about the first rotational axis.

A gas ejection apparatus includes a cylindrical cylinder, cylinder walls, blades, and a gas sending outlet. The cylinder walls divide an inside of the cylinder into a plurality of chambers. The blades send out gas in the plurality of chambers to an outside of the cylinder by a rotary motion of the blades that compresses the gas. The gas sending outlet is provided to each of the plurality of chambers on an end wall of the cylinder adjacent to a circumference of the cylinder.

A gas ejection apparatus includes: a cylinder having a rotating member that rotates within the cylinder; a motor coupled to the rotating member of the cylinder and that causes gas to be compressed inside the cylinder and to he ejected from the cylinder by causing rotation of the rotating member; a control circuit board that controls the motor; and a case in which the cylinder, the motor and the control circuit board are disposed. The case extends in a planar direction and has side surfaces that are orthogonal to the planar direction. The motor and the cylinder are arranged adjacent to each other in the planar direction of the case. The control circuit board is disposed adjacent to and substantially parallel to one of the side surfaces of the case.

A gas ejection apparatus ejects gas using a compressor that compresses the gas by a rotating body inside a cylinder, and includes a detector and a microcomputer. The detector detects a position of the rotating body inside the cylinder based on positions of gears which are coupled to the rotating body. When the microcomputer receives an ejection instruction, the microcomputer controls intake and exhaust of the compressor according to detection results of the detector, and causes the compressor to wait in an intake completion state upon completion of ejection of the gas that was performed in response to the ejection instruction.

The invention relates to a piston machine which comprises: a housing with a chamber with has a substantially circle sector-shaped cross-section; a pivotal piston which is designed as a pivoting element, is arranged in the housing and comprises a first working surface, wherein the housing and the piston define at least one first variable working chamber; a drive or output which is connected to the piston; and an outlet which is arranged in the working chamber for discharging a working fluid. The housing has a cooling opening in at least one housing wall, said opening leading to the chamber at least for convectively cooling a piston side opposite the first working surface by means of a coolant.

An air compressor according to an embodiment, which includes a cylinder and a rotating body provided to be rotatable around a rotation axis in the cylinder so as to generate compressed air through intake and exhaustion caused by rotation of the rotating body, includes an intake valve. The intake valve takes air in the intake and exhaustion. The intake valve is provided in the cylinder.

A rotation device according to an embodiment includes a first gear, a second gear, and an energizing part. The first gear includes a toothless part and is connected with a rotation driving source. The toothless part is obtained by cutting a part of continuous teeth of the first gear. The second gear is arranged to be able to be engaged with the first gear and is rotated, when engaged with the first gear, in a predetermined direction by a rotation of the rotation driving source in one direction. The energizing part energizes the second gear in a direction reverse to the predetermined direction when the second gear is in a free state in which an engagement of the second gear with the first gear is released by the toothless part.

An apparatus comprising a first piston member (22) rotatable about a first rotational axis (30) and a rotor (16) comprising a first chamber (34a) and pivotable about a second rotational axis (32). The first piston member (22) extends across the first chamber (34a). The rotor (16) and first piston member (22) are rotatable around the first rotational axis (30), and the rotor (16) is pivotable about the second rotational axis (32) to permit a relative pivoting motion between the rotor (16) and the first piston member (22) linked to the rotor (16) rotating about the first rotational axis (30).

The invention relates to a piston machine which comprises: a housing with a chamber with has a substantially circle sector-shaped cross-section; a pivotal piston which is designed as a pivoting element, is arranged in the housing and comprises a first working surface, wherein the housing and the piston define at least one first variable working chamber; a drive or output which is connected to the piston; and an outlet which is arranged in the working chamber for discharging a working fluid. The housing has a cooling opening in at least one housing wall, said opening leading to the chamber at least for convectively cooling a piston side opposite the first working surface by means of a coolant.