Abstract: An impeller and at least a portion of a cooperating peripheral volute may be integrated are integrally injection molded with, concentric outer rotor and inner stator assemblies, respectively, to achieve a low profile precision impeller mechanism based on an improved brushless D.C. motor with low length to diameter ratio and suitable for use in a variety of other applications. A rotating cap has an inner circumference which is molded about an outer ferromagnetic back ring that in turn supports a rotor magnet having a number of poles of alternating polarity and separated by a relatively small cylindrical air gap from a fixed stator assembly. The fixed stator assembly is integrally molded into a base housing having a bearing support that extends upwardly through the center of the stator assembly and that is rotatably coupled to a rotating shaft that extends downwardly from the center of the rotating cap.

Abstract: An impeller and at least a portion of a cooperating peripheral volute may be integrated are integrally injection molded with, concentric outer rotor and inner stator assemblies, respectively, to achieve a low profile precision impeller mechanism based on an improved brushless D.C. motor with low length to diameter ratio and suitable for use in a variety of other applications. A rotating cap has an inner circumference which is molded about an outer ferromagnetic back ring that in turn supports a rotor magnet having a number of poles of alternating polarity and separated by a relatively small cylindrical air gap from a fixed stator assembly. The fixed stator assembly is integrally molded into a base housing having a bearing support that extends upwardly through the center of the stator assembly and that is rotatably coupled to a rotating shaft that extends downwardly from the center of the rotating cap.

Abstract: An impeller and at least a portion of a cooperating peripheral volute may be integrated into, and preferably are integrally injection molded with, concentric outer rotor and inner stator assemblies, respectively, to achieve a low profile precision impeller mechanism based on an improved brushless d.c. motor with low length (L) to diameter (D) ratio and suitable for use in a variety of other applications. In one practical embodiment of such a motor, a rotating cap has an inner circumference which is molded about an outer ferromagnetic back ring that in turn supports a permanently magnetized ring shaped rotor magnet having a number of poles of alternating polarity defined about its inner circumference and separated by a relatively small cylindrical air gap from the outwardly projecting radially oriented selectively magnetized poles of a fixed stator assembly. In one exemplary embodiment, the rotor may have 8 poles and the stator may have 9 poles.

Abstract: An impeller and at least a portion of a cooperating peripheral volute may be integrated into, and preferably are integrally injection molded with, concentric outer rotor and inner stator assemblies, respectively, to achieve a low profile precision impeller mechanism based on an improved brushless d.c. motor with low length (L) to diameter (D) ratio and suitable for use in a variety of other applications. In one practical embodiment of such a motor, a rotating cap has an inner circumference which is molded about an outer ferromagnetic back ring that in turn supports a permanently magnetized ring shaped rotor magnet having a number of poles of alternating polarity defined about its inner circumference and separated by a relatively small cylindrical air gap from the outwardly projecting radially oriented selectively magnetized poles of a fixed stator assembly. In one exemplary embodiment, the rotor may have 8 poles and the stator may have 9 poles.

Abstract: Magnetic clasps for securing the opposed ends of chains and other jewelry. Each clasp includes an arrangement for securing separable bodies by means of magnets that have been poled to present opposed surfaces of opposite magnetic polarities. In a first embodiment, disk-like magnets are received in channels of mating elongated body members of like configuration. End flanges of the elongated body members, in addition to the disk-like magnets, provide axial resistance to separation while the resultant magnetic force prevents separation in the transverse direction. In a second embodiment, disk-like magnets of divided polarities are seated at ends of mating bodies. A pin-and-slot locking mechanism is formed in the two bodies and the magnets are oriented relative thereto so that resultant repulsive magnetic forces force the two magnets into mating alignment when in the longitudinal slot for maximum magnetic holding force.

Abstract: A jewelry element includes a magnetic arrangement for ready substitution of multiple decorative elements. The element, which may be incorporated into a number of common jewelry pieces including a cuff link, earring, a stud for a tuxedo shirt, a ring or an pendant, includes a frame having a recessed central portion for receiving a decorative element. A pair of magnets is press-fit within a circular slot at the bottom of the recess and another magnet is adhesively-fixed to the bottom of the decorative element. An aperture in the bottom of the recessed portion of the frame provides access for a stylus for selectively dislodging the decorative element.

Abstract: Magnetic clasps for securing the opposed ends of chains and other jewelry. Each clasp includes an arrangement for securing separable bodies by means of magnets that have been poled to present opposed surfaces of opposite magnetic polarities. In a first embodiment, disk-like magnets are received in channels of mating elongated body members of like configuration. End flanges of the elongated body members, in addition to the disk-like magnets, provide axial resistance to separation while the resultant magnetic force prevents separation in the transverse direction. In a second embodiment, disk-like magnets of divided polarities are seated at ends of mating bodies. A pin-and-slot locking mechanism is formed in the two bodies and the magnets are oriented relative thereto so that resultant repulsive magnetic forces force the two magnets into mating alignment when in the longitudinal slot for maximum magnetic holding force.

Abstract: A jewelry element includes a magnetic arrangement for ready substitution of multiple decorative elements. The element, which may be incorporated into a number of common jewelry pieces including a cuff link, earring, a stud for a tuxedo shirt, a ring or an pendant, includes a frame having a recessed central portion for receiving a decorative element. A pair of magnets is press-fit within a circular slot at the bottom of the recess and another magnet is adhesively-fixed to the bottom of the decorative element. An aperture in the bottom of the recessed portion of the frame provides access for a stylus for selectively dislodging the decorative element.

Abstract: A cuff link includes a magnetic arrangement for ready substitution of alternative decorative elements. One or more links of the cuff link comprises a frame member that is magnetically engageable to a removable element having a decorative exterior surface. The frame and the removable element include mating semi-cylindrical internal surfaces that receive disk-shaped pluralities of magnets. The disk-shaped magnets are arranged so that, when the frame is engaged to the replaceable element, they are aligned along a common axis whereby lines of magnetic flux are axially-directed therethrough to provide a strong bond. An edge of the removable element is bevelled to assist the wearer in ready substitution of replaceable elements.