Abstract: Vacuum pump (1), comprising a housing (2) having an inlet (4) and an outlet (6) and defining a chamber (8) within the housing (2), a rotor (10) for rotational movement about a rotational axis (AR) within the chamber (8), and at least a first and a second vane (22, 24) received in respective first and seconds slots (16, 18) formed in the rotor (10). The first and second slots (16, 18) are substantially parallel to each other, and a length (LV) of each vane (22, 24) is larger than a length (LS) of the respective slot. Production method of such a vacuum pump.

Abstract: A rotary compressor (102) has a shaft (4), a cylinder (5), a piston (8), a first vane (32), a second vane (33), a first suction port (19), and a second suction port (20). The first vane (32) divides a space between the cylinder (5) and the piston (8) along a circumferential direction of the piston (8). The second vane (33) further divides the space divided by the first vane (32) along the circumferential direction of the piston (8) so that a first compression chamber (25) and a second compression chamber (26) having a smaller volume than the first compression chamber (25) are formed within the cylinder (5). The first suction port (19) introduces a working fluid into the first compression chamber (25). The second suction port (20) introduces a working fluid into the second compression chamber (26). The second suction port (20) is provided with a suction check valve (50).

Abstract: A rotary compressor (102) has a shaft (4), a cylinder (5), a piston (8), a first vane (32), and a second vane (33). The first vane (32) divides a space between the cylinder (5) and the piston (8) along a circumferential direction of the piston (8). The second vane (33) further divides the space divided by the first vane (32) along the circumferential direction of the piston (8) so that a first compression chamber (25) and a second compression chamber (26) having a smaller volume than the first compression chamber (25) are formed within the cylinder (5). The piston (8) and the second vane (33) are integrated together, or the piston (8) and the second vane (33) are coupled together.

Abstract: A planetary rotation machine including at least one ring channel which is curved along an at least partial arc and that contains a piston that can be moved in a fluid generating a movement. The piston can be coupled to a rotary body coaxially arranged by a lever by the rotational axis thereof. A stable structure able to transmit high torques is obtained by guiding the lever through a gap created in the wall of the ring channel in a direction of displacement of the piston, in a radial direction away from the piston in a sealed manner.

Abstract: The present invention provides a vane pump having variable displacement and high efficiency. The variable displacement vane pump includes a plurality of elongate, axially extending inserts disposed in the rotor. One of the inserts is disposed between every adjacent vane pair. The inserts are received within axially extending pockets in the rotor and are coupled to the rotor by springs. At lower rotational speeds, the inserts are retracted and the displacement of the pump chambers is at maximum. At higher rotational speeds, the inserts are advanced into the pump chambers, effectively reducing their displacement. Thus, the variable displacement pump compensates for the varying drive speed and achieves improved uniformity of fluid flow by providing maximum displacement at low speeds and reduced displacement at higher speeds.

Abstract: An engine or pump is described which has a round cylinder in cross section, the surface of the cylinder being a round toroidal tube in the rotary direction. The cylinder is made of two equal parts, one part fixed and one part rotating with each part meeting on a flat surface at a right angle to the driveshaft. Force exerted axially against the rotating cylinder part by a spring diaphram seals the cylinder where the two parts meet on the flat surface. The spring diaphram is pre-loaded by a thrust bearing in a pre-loading disk to apply force to the rotating part of the cylinder. Within the cylinder are one or more round toroidal section pistons that are attached to the rotating part of the cylinder by piston pins. A hinged internal cylinder abutment is actuated by the piston as the piston passes through the abutment section. Working fluid to the cylinder is controlled by an internal valve actuated by a cam-disk on the driveshaft.

Abstract: A rotary machine includes a stationary housing having a rotor chamber and a rotor rotatably mounted in the rotor chamber, the inner peripheral surface of the rotor chamber having a central axis which is eccentrically disposed relative to the axis of rotation of the rotor. The housing has generally planar inner end walls having a cylindrical opening through which the rotor shaft extends. A plurality of vanes are slidably mounted in vane slots in the rotor and operable to define variable volume chambers as the rotor rotates and the vanes move generally radially in and out of the vane slots. Back pressure regulating grooves are disposed in the end walls of the housing, the grooves having a central axis coincident with the axis of rotation of the rotor, the grooves being juxtaposed to the vane slots and communicating with the vane slots for regulating the internal back pressure on the vanes in the vane slots.

Abstract: A reversible rotary internal combustion engine comprising a stator which defines a cylindrical chamber (43), a drive shaft (1) extending coaxially through the chamber, a rotor (2) comprising a cylindrical hub mounted coaxially on the drive shaft and a rotor arm (3) extending radially from the hub, two radially movable wall members (4a, 4b) mounted in the stator, each of the wall members having a retracted position in which the radially inner face of the wall member lies flush with the inner periphery of the stator and an inserted position in which the face of the wall member is in contact with the peripheral surface of the hub, means (8a, 8b) for selecting one of the wall members (4a, 4b) to lie normally in the inserted position so as to divide the chamber (43) into a combustion chamber (47) between such wall member and the rotor arm (3) and an air compression chamber (48), means (12, 13) for introducing air and a fuel into the combustion chamber (47) whereby upon ignition of the fuel/air mixture the combusti

Abstract: A rotary vacuum pump is proposed, having a rotor with vanes which rotates eccentrically within a housing bore. Each vane is coupled with a body which is ineffective at relatively low pump rpm; however, at higher rpm, the body engages the vane in such a manner that it removes the vane from its track within the housing bore.In this manner, an rpm-dependent shutoff device is created for the pump. In cooperation with the furnishing of underpressure as an auxiliary pressure in motor vehicles, the pump is used to supplement the underpressure which prevails when the internal combustion engine is at low, idling rpm; this prevailing underpressure is at a very low pressure level, and so when it is thus supplemented there is sufficient auxiliary vacuum force available over the entire rpm range.