Abstract: To create an electric motor, comprising a rotor and a stator, whereby the rotor is spherically supported, which motor has a high efficiency, it is proposed, that the rotor produces a magnetic field, that the surface of the rotor facing the stator has a spherical configuration, that the rotor and stator are adapted to each other so that a maximal magnetic attraction force which keeps the rotor on the spherical bearing is larger than the maximal axial counterforce.

Abstract: An electric motor comprising a rotor and a stator is disclosed. The rotor is supported on a substantially spherical bearing and is of a substantially spherical design facing the stator, which has a high degree of efficiency. The stator may have a magnetic return-path body which is made of a compressed powder material. The return-path body may be of a substantially spherical design, at least in segments facing the rotor.

Abstract: A pump particularly adapted for use in a closed fluid circuit, as within its housing a resiliently compressible chamber in contact with the fluid being conveyed by the pump so that any pressure change within the fluid caused by temperature variations can be volumetrically absorbed by compression or extension of the chamber.

Abstract: An electric motor comprising a rotor and a stator is disclosed. The rotor is supported on a substantially spherical bearing and is of a substantially spherical design facing the stator, which has a high degree of efficiency. The stator may have a magnetic return-path body which is made of a compressed powder material. The return-path body may be of a substantially spherical design, at least in segments facing the rotor.

Abstract: An electric motor comprising a rotor and a stator is disclosed. The rotor is supported on a substantially spherical bearing and is of a substantially spherical design facing the stator, which has a high degree of efficiency. The stator may have a magnetic return-path body which is made of a compressed powder material. The return-path body may be of a substantially spherical design, at least in segments facing the rotor.

Abstract: A centrifugal pump with an integrally-constructed electrical motor. The motor has a hemi-spherical rotor mounting the impeller and comprising at least two permanent magnetic poles. The rotor is balanced on a spherical bearing including a ball or a hemispherical structure mounted at the end of a shaft engaged into an axial cavity in the smallest end of the rotor. A thin, waterproof and static septum is positioned in the air gap between the stator and the rotor. The annular stator includes a bowl-shaped yoke and a winding, applied to the inner surface of the yoke, comprising segments running in successive alternate sections obliquely to the motor's axis of rotation between the upper and lower rims of the yoke. Due to the geometry of the motor, the residual magnetic forces urge the rotor toward a balanced position against the shaft and bearing.

Abstract: A compact electrical motor, particularly adapted to act as the driving component of a centrifugal pump, has a hemispherical rotor mounting the impeller and comprising at least two permanent magnetic poles. A thin, waterproof and static septum intimately surrounds the rotor. A circular stator includes a bowl-shaped yoke and a winding applied to the inner surface of the yoke and comprising segments running in successive, alternate sections obliquely to the motor's axis of rotation between the upper and lower rim of the yoke. The successive foldings of the strands about the upper and lower rim of the yoke substantially eliminates the electro-mechanically inactive and power-dissipating portions of the stator or winding found in motors of the prior art.

Abstract: In the motor assembly of a pump in which a magnetic rotor is balanced on a spherical bearing projecting into an axial cavity of said rotor assembly, the bearing surface inside the cavity is shaped and dimensioned to stabilize the rotor assembly in the presence of diverging magnetic forces generated by the permanent magnets forming the core of the rotor.

Abstract: To create an electric motor comprising a rotor, a stator and a bearing by which the rotor is spherically suspended, whereby the bearing comprises a bearing cap and a ball-shaped sliding partner which slides in the bearing cap, which motor allows a high degree of freedom in respect to the outer extensions while it has a play-free bearing, it is proposed that the rotor creates a magnetic field and that the bearing cap has a material-free area which is formed in such a way that a power vector of the total resulting force hits the material-free area when the rotor is asymmetric to the stator.

Abstract: To create an electric motor, comprising a rotor and a stator, whereby the rotor is spherically supported, which motor has a high efficiency, it is proposed, that the rotor produces a magnetic field, that the surface of the rotor facing the stator has a spherical configuration, that the rotor and stator are adapted to each other so that a maximal magnetic attraction force which keeps the rotor on the spherical bearing is larger than the maximal axial counterforce.

Abstract: In the motor assembly of a pump in which a magnetic rotor is balanced on a spherical bearing projecting into an axial cavity of said rotor assembly, the bearing surface inside the cavity is shaped and dimensioned to stabilize the rotor assembly in the presence of diverging magnetic forces generated by the permanent magnets forming the core of the rotor.

Abstract: A pump particularly adapted for use in a closed fluid circuit, as within its housing a resiliently compressible chamber in contact with the fluid being conveyed by the pump so that any pressure change within the fluid caused by temperature variations can be volumetrically absorbed by compression or extension of the chamber.

Abstract: A compact electrical motor, particularly adapted to act as the driving component of a centrifugal pump, has a hemispherical rotor mounting the impeller and comprising at least two permanent magnetic poles. A thin, waterproof and static septum intimately surrounds the rotor. A circular stator includes a bowl-shaped yoke and a winding applied to the inner surface of the yoke and comprising segments running in successive, alternate sections obliquely to the motor's axis of rotation between the upper and lower rim of the yoke. The successive foldings of the strands about the upper and lower rim of the yoke substantially eliminates the electro-mechanically inactive and power-dissipating portions of the stator or winding found in motors of the prior art.

Abstract: A centrifugal pump with an integrally-constructed electrical motor. The motor has a hemi-spherical rotor mounting the impeller and comprising at least two permanent magnetic poles. The rotor is balanced on a spherical bearing including a ball or a hemispherical structure mounted at the end of a shaft engaged into an axial cavity in the smallest end of the rotor. A thin, waterproof and static septum is positioned in the air gap between the stator and the rotor. The annular stator includes a bowl-shaped yoke and a winding, applied to the inner surface of the yoke, comprising segments running in successive, alternate sections obliquely to the motor's axis of rotation between the upper and lower rims of the yoke. Due to the geometry of the motor, the residual magnetic forces urge the rotor toward a balanced position against the shaft and bearing.

Abstract: In a hot and cold water distribution system wherein the hot water is delivered from a water heater to a distant hot water tap adjacent to a cold water tap, a hot water recirculation pump assembly purges the hot water line of any cooled-down water in order to assure instant hot water delivery when the hot water tap is opened. The volume of water drawn from the hot water line is, in a first embodiment of the invention, cooled down through a radiator before being recirculated through the cold water line faucet. In a second embodiment, the volume of cooled down water is flushed back through the hot water line by admission of an equal volume of cold water in that line. That volume of cold water is immediately pumped back into the cold water line, and automatically replaced by hot water drawn from the water heater. Each embodiments prevent any drawing of lukewarm water from the cold water tap. The pump assembly includes a pressure-sensitive check-valve in the pressure region of each pump.

Abstract: In a plumbing installation wherein hot water is piped from a water heater or reservoir to a plurality of taps by a distribution conduit, an improved recirculation circuit of limited power consumption to continually pump small amounts of hot water from said conduit back into said reservoir which comprises a low power radial pump unprotected by a check valve against backflow, but having a rotary impeller with linear radial vanes leading to an annular output channel larger than necessary for maximum pumping throughput. The oversized annular channel and linear vanes limit the impact of any backflow upon the impeller and prevents its operating as a tubine as the pump is subjected to back pressure when a large amount of water is being drawn through the taps.

Abstract: A rotor of an electric motor with a spherical magnetic gap or an impeller which forms a pivotably mounted rotating unit with an armature consists of a permanent magnetic annular member which is arranged juxtaposedly to a second stationary permanent magnetic annular member. The two magnets are spaced apart from each other by an air-gap and remain apart from each other because of their polarity. This prevents tumbling and counteracts the hydraulic thrust to prevent liftoff of the rotating unit from the step bearing.

Abstract: A step bearing with spherical gliding surfaces having a stationary mounted ceramic ball mounted on a strut, on which a magnetic rotor with a concave cap is rotating under working conditions. During operation the rotor with the cap is pressed by magnetic thrust in the direction toward the strut, while a second annular bearing member of the rotor prevents axial movement of the cap when axial forces in the direction opposite to the direction of the magnetic forces become higher than the magnetic forces.

Abstract: The heat exchanger, gas to fluid, consists of a cylindrical wall separating fluid from gas and a helical strip forming secondary exchange surfaces which carry additional heat exchange members forming tertiary heat exchange surfaces to increase the active surface and the heat transfer coefficient in the gas compartment.

Abstract: The invention is concerned with magnetically driven centrifugal pumps whose rotor forms a unit with an impeller, which is located in a rotary magnetic field. The rotor is mounted to said impeller by a spring loaded clamp.