Abstract:
The mouthpiece appliance includes an assembly for receiving teeth (12) which includes a plurality of cleansing portions, typically two opposing side portions (14, 16) and an intermediate center portion (18). The brushing portions include bristle sections which are adapted to clean teeth. The appliance includes at least one DC motor assembly (26) with an output shaft with an eccentric mass of crankshaft (28). The appliance further includes a mechanical motor cover comprising a plurality of arm members which are arranged to connect the DC motor assembly to the cleansing portions of the appliance so that as the unbalanced weight on the output shaft rotates, movement of the cleansing portions, toward and away from the teeth or along the surfaces of the teeth occurs, producing cleansing of the teeth.
Abstract:
A nodal-mounted spring arrangement for an electronic toothbrush includes a V-shaped spring member secured at both ends so that it can operate in out-of-phase torsion mode along the axial dimension thereof. In one embodiment, the V-shaped spring member includes two extended end regions, which extend below a longitudinal edge of the middle portion of the V-spring. The free ends of the extended portions are joined by a flat cross-piece. This “closed end” region is present at both ends of the V-spring.
Abstract:
A V-spring member (18) for use in a driving system for a personal care appliance has regions (34, 36) at the ends of the spring which are large enough to support a contact with an end clamping assembly, the spring member including a cross-piece (40) extending between the longitudinal edges of the spring at the end regions, such that the ends of the spring member define a closed line. End clamping assemblies (16, 24) provided for such a V-spring member include a body portion (64) having a lower support portion (66) on which the V-spring is supported and a mating clamping member (88) positioned in registry with the support portion on top of the V-spring. The support portion and the clamping member include peripheral edges (74, 92) which have a curved cross-sectional configuration, and which are in registry, making contact with the spring member in the end regions in such a manner as to reduce stress concentrations in the end regions of the spring, thereby reducing fretting fatigue and fretting damage in the spring.
Abstract:
A brushhead assembly for use with a power toothbrush, comprising a toothbrush element (18), a mounting neck (22) on which the toothbrush element is mounted and a coupling member (24) which mates a driveshaft (from a drive system in a handle assembly portion (12) of the toothbrush to the mounting neck. A ring member (34) is positioned within a groove (30) at the proximal end (32) of the coupling member to create a desired brushhead assembly inertia. On an extending portion of the coupling member is mounted a spring member (28) which is configured and arranged and has such a spring rate that when the coupling member and mounting neck are installed into a driveshaft, a preload force is created between the brushhead assembly and the driveshaft sufficient to react the torque created by the rotating inertia movement of the brushhead assembly, without lost motion or noise.
Abstract:
The hands-free dental appliance includes upper and lower tray members (12, 14) for receiving the teeth of the user, the tray members having teeth contact members such as bristles. A power assembly (28) moves the tray member in a reciprocal manner, resulting in cleaning of the surfaces of the teeth by the bristles. A grounding system (30) with bite portions (32, 34, 36) for biting contact whereby the user's teeth grounds the appliance to the user's mouth structure, reacting both static and dynamic forces, the grounding system being either separate from the tray members or flexibly connected to the tray members, allowing the tray members to move and clean the teeth without the user having to hold or otherwise manipulate the appliance.
Abstract:
A mouthpiece appliance includes an assembly for receiving teeth which includes cleansing portions, such as two opposing side portions and an intermediate center portion. The brushing portions include bristle sections which are adapted to clean teeth. The appliance also includes at least one DC motor assembly with an output shaft with an eccentric mass of crankshaft. The appliance further includes a mechanical motor cover including arm members which are arranged to connect the DC motor assembly to the cleansing portions of the appliance so that as the unbalanced weight on the output shaft rotates, movement of the cleansing portions, toward and away from the teeth or along the surfaces of the teeth occurs, producing cleansing of the teeth.
Abstract:
The mechanical system includes an interface for moving parts, with the mechanical system including a driving assembly and a driven assembly, wherein the driving assembly mates with the driven assembly at a mechanical joint (41). The driving assembly includes a rotating disc (16) and a drive arm (18) rotatably connected thereto. The driven assembly includes a pivot arm (40) which is driven by the drive arm and also a grounded member (44) fixed to the handle about which the pivot arm moves. A preload assembly, which includes a spring or springs (54, 56) is connected to the drive arm and the pivot arm so as to place a preload at the axis of rotation of the mechanical joint between the drive arm and the pivot arm.
Abstract:
The toothbrush in FIG. 1 includes a toothbrush body (12) and a brushhead assembly (14) which includes a manual field of bristle tufts (16) and a single/small plurality of bristle tufts (18) at a forward end of the manual field of bristles. The single bristle tuft or tufts is driven axially in the direction of the teeth, and is suitable for cleaning interproximal regions of the teeth.