Abstract: The compressor includes a sealed housing defining a suction volume and a compression volume respectively provided on either side of a body contained in the housing, an oil injection circuit supplied with oil from an oil contained in a casing and adapted for injecting oil into the compression volume, the oil injection circuit comprising an electrovalve including a body attached to the wall of the sealed housing and a core movable under the action of a magnetic fluid between a closing position for injecting oil into the compression volume and an opening position preventing or limiting the injection of oil into the compression volume. The compressor includes a control system for moving the core of the electrovalve between the opening and closing positions based on the compressor speed and/or on the cooling gas discharge temperature.

Abstract: A sealed compressor has a lower end cap secured to a center shell, and defines a sealed chamber. An electric motor is received within the sealed chamber. The electric motor drives a shaft that drives a compressor pump unit. A lower bearing housing includes a bearing for supporting the shaft, and an oil pump. The oil pump includes a pump housing including one of a slot and a leg, with the bearing housing including the other of a slot and a leg. The leg is received in the slot to position the pump housing within the bearing housing. The oil pump further includes a piston to be driven by the shaft to drive the lubricant from a sump in the sealed chamber upwardly into a passage in the shaft.

Abstract: The present invention relates to a spray head for effective fire fighting. The spray head according to the present invention provides a uniform distribution of a fluid, such as pressurised water, over a relatively large area. To achieve this, the spray head comprises a body defining a central axis and further comprising a fixation structure for fixing the spray head to a fluid supply system, a fluid inlet, directing fluid in a first direction, a plurality of outlet holes arranged around the central axis, and a flow path between the inlet and the holes, wherein a first set of holes are located in such a way, that the fluid is leaving the first set of holes in a second direction opposite to the first direction and wherein the body further comprises an arrangement for holding a fire actuation member.

Abstract: The invention concerns a valve arrangement (7) comprising a flow path (11) connecting an inlet (9) and an outlet (10), a closing means (12) arranged in said flow path (11), a resetting means and a first pressure in a first pressure chamber (14) acting in a closing direction on said closing means (12), a pressure of said outlet (10) and a second pressure in a second pressure chamber (18) corresponding to a pressure of said inlet (9) when said closing means (12) is closed acting in opening direction on said closing means (12), said first pressure chamber (14) being connectable to the outlet (10) via an auxiliary valve (13). It is intended to keep small a pressure pulse when opening the valve arrangement (7). This is achieved in that the closing means (12) having a first opening state (A) and a second opening state (B), a flow resistance of said closing means (12) in said first opening state (A) being larger than a flow resistance of said closing means in said second opening state (B).

Abstract: The invention relates to a hydraulic machine comprising a housing section with a housing, a commutation section and a gear wheel section, the gear wheel section comprising a gear wheel set with an internally toothed gear ring and an externally toothed gear wheel, which engage each other and form working chambers that are connected to at least one inlet connection and at least one outlet connection via the commutation section that comprises a rotary slide valve and a valve plate. It is endeavored to provide such a hydraulic machine that requires only little space. For this purpose, a sealing is arranged between the rotary slide valve and the housing.

Abstract: The invention relates to a hydraulic drive (2) having a main pump (8), which can be adjusted in terms of delivery volume and delivery direction, and having a hydraulic motor (9), which main pump (8) and hydraulic motor (9) are connected to one another in a closed circuit via pressure lines (10A, 10B), and having a charge pump (14, 15) for charging into the closed circuit and for supplying pressurized fluid to at least one controlling device (11, 12), wherein the charge pump (15) has a separate drive motor (19) whose power/rotational speed can be specified independently of the rotational speed of the drive (3) of the main pump (8). In this way, the charge pump (15) can be of smaller dimensions than previously conventional, and the power balance of the hydraulic drive can be improved.

Abstract: A joystick (1) comprising a substantially stationary part (4) and a movable part (3) adapted to be manipulated by an operator. The joystick further comprises a sensor device adapted to detect a position of the movable part (3) relatively to the substantially stationary part (4), the sensor device comprising a magnet arrangement comprising one or more magnets (9) and defining a predetermined magnetic field, and a magnetic detector being adapted to detect a magnetic flux and to generate a corresponding output. The magnet arrangement or the magnetic detector is arranged on the substantially stationary part (4), while the magnetic detector or the magnet arrangement is arranged on the movable part (3). Thereby relative movements between the parts (3, 4) result in relative movements between the magnet arrangement and the magnetic detector.

Abstract: A sensor system for road construction equipment. The system includes a first conveyor for transporting material to a first auger that is positioned to receive the material. A first feeder sensor associated with the first conveyor is in over-the-air communication with a receiver to communicate the height of a material on the conveyor such that a master controller that is electrically connected to the receiver can regulate the amount of flow of material to the first conveyor.

Abstract: A sensing system for providing vehicle automation. The system includes a master controller that is electrically connected to a receiver that has a transceiver that provides over-the-air communication to a plurality of wireless sonic sensors. The transceivers receive information from the plurality of wireless sonic sensors in order to automate the control of the vehicle to ensure the vehicle drives in a straight line.

Abstract: A sensing system for providing vehicle automation. The system includes a master controller that is electrically connected to a receiver that has a transceiver that provides over-the-air communication to a plurality of wireless sensors. The transceivers receive information from the plurality of wireless sensors in order to automate the steering and elevation of the vehicle.

Abstract: An expansion device unit (4) for a vapour compression system (1), and a vapour compression system (1) are disclosed. The expansion device unit (4) comprises an inlet opening (17) arranged to receive fluid medium, at least two outlet openings (18) arranged to deliver fluid medium, a main expanding section (6) adapted to expand fluid medium received via the inlet opening (17) before delivering the fluid medium to the outlet openings (18), and a distribution section (7) arranged to split the fluid flow received via the inlet opening (17) into at least two fluid flows to be delivered via the outlet openings (18). The main expanding section (6) and/or the distribution section (7) is/are arranged to cause pressures in fluid delivered via at least two of the outlet openings (18) to be distinct. The main expanding section (6) is operated on the basis of one or more parameters measured in the fluid flow delivered by one of the outlet openings (18).

Abstract: Embodiments of the invention provide a variable frequency drive system and a method of controlling a pump driven by a motor with the pump in fluid communication with a fluid system. The drive system and method can provide one or more of the following: a sleep mode, pipe break detection, a line fill mode, an automatic start mode, dry run protection, an electromagnetic interference filter compatible with a ground fault circuit interrupter, two-wire and three-wire and three-phase motor compatibility, a simple start-up process, automatic password protection, a pump out mode, digital input/output terminals, and removable input and output power terminal blocks.

Abstract: The invention concerns an electromagnetic actuator (7) with a coil (8) and at least two armatures (12, 17) being movable along an axis (16) and being acted upon by a magnetic field generated by the coil (8). It is endeavoured to achieve large control opportunities by simple means. For this purpose, it is provided that one armature (12) is acted upon by a larger drive force from the magnetic field than another armature (17).

Abstract: The invention concerns a vane cell machine having a stator and a rotor that is made of a first material, the rotor having guides comprising radially displaceable vanes that rest on an inside of the stator and border work chambers at each axial end of the rotor together with the rotor, the stator and individual stationary side walls, the vanes having, at least at some contact faces with the rotor and the stator, a second material that interacts unfrictionally with the first material. It is endeavoured to keep the wear small. For this purpose, in a radially inner area, the side wall comprises a surface of a third material interacting unfrictionally with the first material and, in a radially outer area a surface made of the first material.

Abstract: The invention concerns a vane cell machine with a stator and a rotor having radially displaceable vanes arranged in guides, said vanes bearing on an inside of the stator and bordering, together with the rotor, the stator and a side wall, work chambers at each axial end of the rotor. It is endeavoured to provide a vane cell machine that has a good internal tightness, in which the wear is still kept small. For this purpose, in a radially internal area the side wall comprises an insert that is axially movable in the side wall and has a pressure application surface axially inside and axially outside.

Abstract: A sensing system for providing string line vehicle automation. The system includes a master controller that is electrically connected to a receiver that has a transceiver that provides over-the-air communication to a plurality of sensors that are aligned along a string line. The transceivers receive information from the plurality of sensors in order to automate the control of the vehicle to ensure the vehicle drives in a straight line.

Abstract: The refrigeration compressor according to the invention includes a sealed enclosure containing a compression stage and provided with a refrigerant inlet and outlet, the compressor being configured such that under usage conditions, a flow of refrigerant circulates through the refrigerant inlet, the compression stage, and the refrigerant outlet. The compressor has an oil pan and oil recirculation means arranged to orient the oil contained in the oil pan into the flow of refrigerant when the oil in the oil pan exceeds a predetermined oil level. The recirculation means include a recirculation line housed in the sealed enclosure and including an inlet port situated at a height substantially corresponding to the predetermined oil level, an outlet port emerging in the refrigerant flow, and an intermediate part connecting the inlet and outlet ports. The intermediate part includes a first portion extending below the predetermined oil level.

Abstract: An air duct arrangement for cooling a group (1) of at least two heat producing modules is provided, said modules (2, 3) being arranged one after the other in the direction of an air flow through said group (1), said air duct arrangement comprising an air path (5, 6) for each module (2, 3). The cooling of modules of a group of modules with cooling air should be enabled with only small space requirements. To this end said air paths (5, 6) are arranged in parallel along a lengthwise direction from a first side of said group (1) to a second side of said group (1), said second side being opposite to the first side, said air path (5, 6) changing their order in a direction perpendicular to said lengthwise direction in a region (13) between said two modules (2, 3).

Abstract: The invention relates to an arrangement having at least one electric potential-varying device for varying the electric potential of at least one electrical device with respect to earth potential, and a plant room facility. In the operating state, the electric potential-varying device is disposed in the plant room facility.

Abstract: A resonance circuit with a variable resonance frequency provided by a variable capacitor having compliant electrodes arranged on a deformable sheet. When the sheet is deformed the capacitance is varied. Further a sensing element comprising the resonance circuit and a sensing system comprising at least one sensing element, a sending unit and a receiving unit. Suitable for mass production. Provides wireless sensing system being cost effective to manufacture. May be used for low cost products, such as toys. May also be used for monitoring displacements in structures, e.g. cracks in wall structures. Further a positions sensitive pressure sensor with pressure sensors arranged on a two-dimensional structure.