Abstract: An axial-gap type storage disk drive motor and storage disk drive configuration is disclosed. The motor includes a stator around retaining cylinder retaining a support sleeve, a storage-disk-carrying rotor, and radial and thrust bearings having striation patterns on the bearing surfaces to develop controlled radial and thrust load-bearing dynamic pressure in an intervening lubricating fluid. The thrust bearing is formed between the upper end of the support sleeve and the rotor. A set of salient poles projecting axially inward is furnished on a bottom face of the rotor hub, axially opposing the stator. The configuration establishes a reluctance type motor: energizing the stator magnetically attracts axially the salient poles on the rotor hub in imparting rotational power thereto. Meanwhile, the magnetic attractive force imparted in the rotor is designed to balance the thrust load-bearing pressure generated in the thrust bearing.

Abstract: Thin-profile spindle motor. Single hydrodynamic-pressure thrust and radial bearings are established about a thrust plate on the end of the motor shaft, encompassed by a cylindrical casing. Hydrodynamic pressure-generating grooves scored on either of the thrust plate end faces, or either of the inner faces of the casing ends opposing the thrust plate end faces, are a component of the single thrust bearing. A micro-gap clearance for the thrust bearing, retaining lubricant continuously with the radial bearing, is established on whichever side of the thrust plate the thrust bearing is formed. Like grooves scored on either the thrust plate circumferential surface, or the casing inner cylindrical surface by which it is opposed at a micro-gap clearance, the clearance itself, and lubricant retained therein form the single radial bearing. Means for magnetically counterbalancing the thrust hydrodynamic-pressure are provided between rotor hub and the stator or casing.

Abstract: A disposable mobile shopping bag that can be readily assembled, and can bear loads well is. The mobile shopping bag is composed of an ordinary shopping sack, a disposable platform insert and press-fitting wheel assemblies. When opened the sack accommodates the inserted platform on base of the sack interior. The platform has press-fitting holes in positions appropriate for holding the wheel assemblies. Press-fitting mounts project from the tops of the wheel assembly forks. To put the mobile shopping bag together, the press-fitting mounts are pressed against the exterior of the bottom of the sack over the respective holes in the platform, into which they are then inserted.