Abstract: An efficient, high-volume fan producing a focused air flow comprises an electric motor having a central, segmented stator and a rotor with a set of permanent magnets and a back iron. The magnets are preferably rare-earth magnets such as neodymium magnets. The fan further features a plurality of lightweight blades, each blade comprising an airfoil cross section comprising a foam core that may be covered with a high tensile-strength skin or plastic coating. In the preferred embodiments, the high tensile-strength skin is an aluminum skin, and edges of the blades have edges are joined with a folded hem. The blades may have a windward tilt, and may be constructed so as to intentionally detach upon impact. The segmented stator, blade shape, and other aspects may be varied for different applications.

Abstract: A wind-driven power source comprises a propeller-driven rotor structure and a stator structure carrying clusters of copper-wire wound ferromagnetic cores as voltage generators. The cores are arranged in pairs spaced apart by hard rubber rollers which engage the inside surface of a load ring forming part of the rotor structure. The overall rotor structure comprises the large diameter load ring, a smaller diameter root ring and a plurality of aerodynamic blades extending radially outwardly from the root ring and secured either by saddle blocks or integral bonding to the load ring. The load ring may be aluminum or plastic. Permanent magnets are arranged around the load ring to interact with the voltage generator structures to produce three-phase electricity.

Abstract: A wind-driven power source comprises a propeller-driven rotor structure and a stator structure carrying clusters of copper-wire wound ferromagnetic cores as voltage generators. The cores are arranged in pairs spaced apart by hard rubber rollers which engage the inside surface of a load ring forming part of the rotor structure. The overall rotor structure comprises the large diameter load ring, a smaller diameter root ring and a plurality of aerodynamic blades extending radially outwardly from the root ring and secured either by saddle blocks or integral bonding to the load ring. The load ring may be aluminum or plastic. Permanent magnets are arranged around the load ring to interact with the voltage generator structures to produce three-phase electricity.

Abstract: A wind-driven power source comprises a propeller-driven rotor structure and a stator structure carrying clusters of copper-wire wound ferromagnetic cores as voltage generators. The cores are arranged in pairs spaced apart by hard rubber rollers which engage the inside surface of a load ring forming part of the rotor structure. The overall rotor structure comprises the large diameter load ring, a smaller diameter root ring and a plurality of aerodynamic blades extending radially outwardly from the root ring and secured either by saddle blocks or integral bonding to the load ring. The load ring may be aluminum or plastic. Permanent magnets are arranged around the load ring to interact with the voltage generator structures to produce three-phase electricity.

Abstract: A Swivel Joint for use on producing wells which are being pumped, having an upper and a lower annular member, in juxtaposition, with a coil spring separating the members, the lower member having a curved external face to receive, in line contact, the inside wall of the retaining member, which is engaged with the upper member, and having a packing chamber and a packing nut having one end extending into said packing chamber, and a grease chamber in said packing nut, and packing members mounted in said packing chamber compressed by one end of said packing nut.