Nec Corporation

Samsung Electro-mechanics Japan Advanced Technology Co., Ltd.

Nihon Shokuhin Kako Co., Ltd.

Alphana Technology Co., Ltd.

Akira Muramatsu

Kazuhiro Kudoh

Takuji Yamada

Takayuki Asai

Hirotake Nishino

Yoshio Kurokawa

Tetsumi Ishiguro

Naoki Shinji

Jiro Hino

Tetsuya Shitaohzono

A rotating body for a fluid dynamic bearing used for rotating a recording disk that has been mounted therein include: a rotating shaft portion in which a cylindrical portion that serves as a rotating shaft and a protruding portion extended radially outward from one end of the cylindrical portion are formed integrally with each other; and a hub that is to be connected to the end portion near to the outer circumference of the protruding portion and that has a mounting seat portion on which the recording disk is to be mounted.

Rotating body for fluid dynamic bearing capable of being thinned and being improved in rotational accuracy and method of producing the rotating body for fluid dynamic bearing

In a rotating device, a housing includes a cylindrical outer surface facing an inner surface of a through hole and a guiding surface arranged on the underside of the outer surface, the diameter of the guiding surface being less than the diameter of the outer surface. Glue has an interface in an end space. In at least a part of the end space where the glue does not exist, conductive resin seamlessly is applied from the guiding surface to the inner surface of the through hole. With regard to a portion of the inner surface of the through hole that radially faces the guiding surface, the length, in the axial direction, of the portion that touches the conductive resin is greater than the length, in the axial direction, of the portion that touches the glue.

Rotating device

A fluid dynamic bearing includes a shaft to which a resin flange is fixed by insert molding. The process where the flange is fixed to the shaft by insert molding includes a flange forming process in which the flange, fixed to the shaft, is formed by injecting the resin into a filled portion in the lower mold through an upper mold, while cooling at least part of the shaft, arranged in a shaft arrangement portion in a lower mold, with cooling water circulating through a cooling pipe.

Fluid dynamic bearing, method of manufacturing fluid dynamic bearing, rotating device, and disk drive device

Disclosed is biodegradable compositions comprising a biodegradable resin and starch, wherein fat or oil treated starch or its gelatinized product is utilized as the starch and thereby its production cost and biodegradability is improved without losing its mechanical properties. Biodegradable compositions comprising a gelatinized product of fat or oil treated starch and a biodegradable resin. A process for the production of the biodegradable composition comprising a gelatinized fat or oil treated starch and a biodegradable resin described above, which comprises heating and kneading fat or oil treated starch and a biodegradable resin in the presence of water or water and a plasticizer.

Biodegradable compositions

In a radio communication apparatus for use in carrying out a receiving operation of selectively receiving a call signal specific to the apparatus, a counter is counted up one by one to produce a count each time when the call signal is received. The count is successively compared with a plurality of threshold values by a control section to determine a controllable perceptual notifying mode which may be at least one of an audible and a visual notifying modes. In the audible notifying mode, the control section varies a volume of an audible tone through a tone generator in dependency upon the count. In the visual notifying mode, display elements, such as light emitting diodes, provide visual displays which are different from one another and which are determined by the count. Such variations of the audible tone and/or the visual displays are helpful for notifying a possessor of reception of the call signal.

Radio communication apparatus capable of notifying reception of a call

A radio pager having means for automatically adjusting the rising time of a high-speed clock. The pager includes a plurality of circuit elements for adjusting the rising time of the high-speed clock, i.e., for compensating the degree of stability of a high-speed clock generating circuit. On the start of a low-speed clock, the high-speed clock generating circuit sequentially selects and connects the circuit elements to thereby count the resulting rising times of the high-speed clock. One of the circuit elements having resulted the shortest rising time is written to a storage. When the high-speed clock is needed, e.g., when a message should be displayed, the stored circuit element is connected to the high-speed clock generating circuit.

Growing community of inventors

Shizuoka, Japan

Akira Muramatsu