Abstract: A scroll compressor may include a rotational shaft, the rotational shaft including a first frame support having an inner circumferential surface, into which a boss of a first scroll is inserted, and an outer circumferential surface that forms an outer surface of the rotational shaft; and at least one guide hole that extends from the inner circumferential surface to the outer circumferential surface.

Abstract: The invention relates to a displacement machine according to the spiral principle, in particular a scroll compressor, with a high-pressure zone which comprises a high-pressure chamber, with a low-pressure chamber and with an orbiting displacement spiral, which engages into a counter spiral such that between the displacement spiral and the counter spiral compression chambers are formed, in order to receive a working medium, wherein between the low-pressure chamber and the displacement spiral a counter pressure chamber is formed.

Abstract: A scroll compressor includes a fixed scroll, a movable scroll revolvable with respect to the fixed scroll, and a crankshaft rotatable to cause the movable scroll to revolve. A discharge port is formed in a first scroll of the fixed scroll or the movable scroll. A cutout portion is formed in a second scroll of the fixed scroll or the movable scroll. The cutout portion formed in the second scroll at least partially passes through a profile of the discharge port formed in the first scroll because of revolution of the movable scroll.

Abstract: A blocking device for a pump having a rotor that is rotatable about a rotation axis in a pump duct and comprises a rotor hub and a rotor collar that extends from the rotor hub in the radial direction and encircles it in an undulating manner, wherein the blocking device comprises a plurality of blocking elements which are configured to block the pump duct in the axial direction on both sides of the rotor collar, wherein each of the plurality of blocking elements has a slot with a U-shaped sealing profile for abutting against the rotor collar, a sealing face for abutting against the rotor hub, and two contacting faces for abutting against a seat of the pump duct and/or against a contacting face of another blocking element of the plurality of blocking elements, and to a pump having a corresponding blocking device.

Abstract: A scroll compressor includes fixed and movable scrolls defining a compression chamber, and a crankshaft. The movable scroll at least partially covers a discharge port formed in the fixed scroll to change a communication area that is a portion of a total area of the discharge port that contributes to communication with the compression chamber. First to third rotation angle positions become larger in order. As the crankshaft rotates from the first to second rotation angle position the communication area increases at a first rate. In the first rotation angle position the compression chamber and the discharge port start communicating with each other. The second rotation angle position is a preliminary discharge interval angle. As the crankshaft rotates from the second to third rotation angle position the communication area increases at a second rate. The second rate of increase is greater than the first rate of increase.

Abstract: A scroll compressor is provided, comprising: a compression mechanism comprising a non-orbiting scroll member and an orbiting scroll member, wherein the orbiting scroll member is axially displaceable between an engagement position and a disengagement position; a main bearing housing adapted to support the compression mechanism; a back pressure chamber formed between the orbiting scroll member and the main bearing housing, wherein the back pressure chamber is in communication with at least one of the compression chambers via a communication passage provided in the orbiting scroll member or the non-orbiting scroll member and is adapted to apply a back pressure to the orbiting scroll member to bias the orbiting scroll member toward the engagement position; and a first sealing means provided between the back pressure chamber and a suction zone of the compression mechanism and capable of maintaining sealing when the orbiting scroll member is axially displaced.

Abstract: A power transmitting component having a first shaft and a pump. The first shaft has a longitudinal bore, a pump mount and a feed conduit. The pump mount has a circumferentially extending surface, a drive portion and a channel that extends circumferentially about the first shaft. The channel is disposed along a longitudinal axis of the first shaft between the drive portion and the circumferentially extending surface. The feed conduit intersects and fluidly couples the longitudinal bore and the channel. The pump has a pump housing, a first rotor and a pump outlet. The pump housing is mounted about the circumferentially extending surface and is disposed circumferentially about the channel. The first rotor is coupled to the drive portion for rotation therewith. The pump outlet is coupled in fluid communication with the channel.

Abstract: A scroll compressor comprising a fixed scroll (15); an orbiting scroll (16) supported in a manner allowing for orbiting motion; a discharge port through which a fluid compressed by the two scrolls (15, 16) is discharged; an end plate step portion (16E) provided on an end plate of the orbiting scroll (16) formed so that a height of the end plate is higher on a center portion side in the direction of a spiral wrap and lower on an outer end side; and a wrap step portion (15E) provided on a wall portion of the fixed scroll (15) that corresponds to the end plate step portion (16E) so that a height of the wall portion is lower on the center portion side of the spiral and higher on the outer end side; wherein the orbiting scroll (16) is treated for surface hardening and the fixed scroll (15) is not treated for surface hardening.

Abstract: An automotive auxiliary assembly vacuum pump includes a housing composite structure with an electric motor section, a pump section, a pump inlet opening, and a pump outlet opening, a motor housing part, a bearing plate which closes the motor housing part proximally, and a pump rotor with a rotor body. The electric motor section includes a motor rotor which is surrounded by the motor housing part and which is closed by the bearing plate. The pump section includes a pump housing which defines a pump chamber and which includes a closure element, at least one pump chamber inlet opening, and at least one pump chamber outlet opening. The pump housing is formed at least by axially proximal and axially distal thrust washers and a radial thrust ring. Only the bearing plate and the axially proximal thrust washer are provided as a single-piece flange element.

Abstract: The pneumatic drill has member defining an air input and an air output and a housing defining an internal cylindrical chamber having bearing surfaces having a through axis. A driven shaft is coupled to the tool engaging chuck that defines a plurality of longitudinal slots. The driven shaft is disposed within the chamber and has a longitudinal axis offset from the through axis. A plurality of vanes each being partially formed of graphite that are individually disposed within one of the plurality's of longitudinal slots. Two of the vanes, the housing, and the driven shaft define a moving compression chamber.

Abstract: A first injection port is open to a suction chamber of a plurality of chambers at some rotation phases, and is located within an angular range defined by a line connecting a winding-end contact point of an orbiting scroll at a compression start phase with a base circle center of a fixed scroll and one of two lines tangent to a winding-end point locus of a tip seal at a tooth tip of a spiral body of the orbiting scroll and passing through a base circle center of the orbiting scroll, the one line of the two tangent lines being closer to the winding-end contact point. The first injection port does not interfere with the tip seal at the tooth tip of the spiral body of the orbiting scroll.

Abstract: An electric compressor includes a housing including a motor housing, a compressor housing, and a shaft support member, which are fastened with a fastening member, and a fluid passage. The shaft support member has a fitted surface fitted onto an opening of the motor housing and a flange portion extending from the fitted surface and interposed between a first end face of the motor housing and a second end face of the compressor housing. The flange portion has a through hole through which the fastening member is inserted and a passage-forming hole through which a first recessed portion and a second recessed portion are in communication with each other. The through hole and the passage-forming hole are arranged in a circumferential direction of the flange portion. The fluid passage is formed at least by the first recessed portion, the second recessed portion, and the passage-forming hole.

Abstract: A scroll compressor includes: a compression mechanism unit 3 that includes a fixed scroll 31 and an orbiting scroll 32; a crank shaft 6 that causes the orbiting scroll 32 to orbit about the fixed scroll 31; a slider 71 that is provided between the orbiting scroll 32 and the crank shaft 6 and that includes tubular portions 711 and 712 and a flange portion 713 projecting from the outer circumferential surface between one end and the other end of the tubular portions 711 and 712; and a balance weight 72 that is fitted to the slider 71 and that includes a ring-like portion 721 having a portion of the inner surface facing the flange portion 713, a weight portion 722 having an inner surface facing the tubular portion 711 or 712 closer to the one end side U than the flange portion 713, and a projection 723 projecting from the inner circumferential surface of the ring-like portion 721 and having an inner surface facing the tubular portion 711 or 712 closer to the other end side L than the flange portion 713.

Abstract: A scroll compressor including an orbiting scroll and a fixed scroll. A compression chamber is formed by combining a fixed-scroll volute of the fixed scroll and an orbiting-scroll volute of the orbiting scroll. Each of sub-discharge ports of the fixed scroll brings any one of a first compression chamber and a second compression chamber of a compression chamber, the first compression chamber being defined by an inward-facing surface of the fixed-scroll volute and an outward-facing surface of the orbiting-scroll volute, the second compression chamber being defined by an outwardfacing surface of the fixed-scroll volute and an inward-facing surface of the orbiting scroll volute, and a discharge side into communication with each other.

Abstract: The invention comprises a paddle board apparatus and method of use thereof, comprising: a manual crank connected to a drive shaft, a rotatable housing, and a set of paddle wheels connected to an outer surface of the rotatable housing, where a child manually turning the crank simultaneously propels the paddle board forward in water through use of the paddle wheels and drives an air pump in the rotatable housing to blow bubbles about the paddle board for enjoyment of the child riding the paddle board.

Abstract: A high speed, rotary lobe gear pump assembly is provided which combines a positive displacement lobe gear pump having wipers with a centrifugal pump utilizing an impeller. The centrifugal pump feeds high pressure fluid flow directly into the lobe gear pump allowing the gear pump to rotate at high speeds without cavitation. The high speed capability of the pump assembly allows the lobe gear pump to operate without speed reduction gearing for the motor shaft.

Abstract: A scroll compressor for a motor vehicle air-conditioning system includes a compressor housing, two interleaving spirals within the compressor housing, of which one spiral is stationary and the other spiral is movable eccentrically on a circular orbit, whereby the volume of compression chambers formed between the spirals changes cyclically and refrigerant is suctioned in and compressed; at least one refrigerant outlet port for ejecting the compressed refrigerant in a wall, frontal to the spirals, of the compressor housing in the center of the stationary spiral, wherein in the spiral end region on the inner end of at least one of the two spirals the concave side of the spiral wall is provided with a cut that has the form of a cone segment with concave curvature, decreasing from the upper end in the direction toward the lower end of the spiral wall.

Abstract: A rotor and/or stator dampening system includes a stator and/or rotor with a liner selected of one or more materials to achieve a desired dampening effect. In one implementation, a progressive cavity motor or pump includes a stator with an internal axial bore therethrough. The stator has a liner along an axial length thereof with an inwardly facing surface defining the internal axial bore therethrough. The liner has a plurality of axial sections with at least two of the plurality of axial sections being constructed of different materials. A compression resistant mechanism, such as a spring or spring-like device, is disposed within at least one of the axial sections of the liner. The progressive cavity motor or pump also includes a rotor that is disposed and is rotatable within the internal axial bore of the stator to form a moving chamber between the rotor and the stator.

Abstract: A scroll compressor includes a bush having a shaft part and a balance weight part. The balance weight part is secured to an outer periphery of the shaft part by shrink-fitting. The shaft part includes: a cylindrical body part; and a cylindrical coupling part which extends outward from an axial end portion of the body part, and to which the balance weight part is joined. The bush satisfies the following requirements: 1.2?D2/D1?1.6; and??(a) 1.0?[(D2?D3)/(D4?D2)]×E1/E2?3.5,??(b) where D1 is the outer diameter of the body part, D2 is the outer diameter of the coupling part, D3 is the inner diameter of the body part, D4 is the outer diameter of the balance weight part, E1 is the Young's modulus of the shaft part, and E2 is the Young's modulus of the balance weight part.

Abstract: A cooling system is configured to operate in one of three modes, a DX mode of operation when outdoor air is too hot or too humid and the cooling system operates as a normal closed circuit system, a hybrid mode of operation when outside temperatures cool down and the cooling system operates as a partial reduced normal closed circuit system and a free cooling system, and a thermosiphon mode of operation when the outside temperature is below a predetermined temperature and the cooling system operates without the normal closed circuit system. The cooling system includes a scroll compressor unit having a main casing, a scroll compressor supported by the main casing, and a refrigerant pump supported by the main casing. The scroll compressor unit is configured to selectively engage the scroll compressor and the refrigerant pump to achieve one of the DX mode, the hybrid mode, and the thermosiphon mode.