Ntn Corporation

Daichi Ito

Satoru Fukuzawa

Yoshio Oki

Takuya Ishii

Katsutoshi Muramatsu

Yasuhito Fujikake

Yutaka Tanaka

Tomoya Nakamura

Katsushi Takeo

Hiroaki Suzuki

Masayuki Nozaki

Hiromichi Kokumai

Naoki Ikemura

A tip sealfor a scroll compressor capable of reducing a frictional force between scroll members and the tip seal where the tip sealhas a spiral shape for sealing a compression chamber formed between a fixed scroll and a movable scroll in a scroll compressor provided with the fixed scroll. The movable scroll having a plurality of concave partsbeing formed by partially notching a sliding surfaceon the scroll members, the concave partsbeing arranged on at least one of a spiral inner peripheral surfaceor a spiral outer peripheral surface. Each of the concave partsbeing open to the inner peripheral surfaceor the outer peripheral surface

Tip seal for scroll compressor

An inspection method of a rolling element includes the steps of: projecting an X-ray from a light source to a rolling element, detecting the X-ray passing through the rolling element by a detector, calculating data of the detected X-ray to form an image, and detecting a defect in the rolling element based on the image. At the step of projecting an X-ray, the light source rotates relatively around the rolling element while the X-ray is projected to an entire region of the rolling element facing the light source. At the step of forming an image, data of the X-ray for one circuit around the rolling element is calculated to generate the image.

Rolling element inspection method, rolling element manufacturing method, and rolling element

A cage includes: an annular body having pocket holes for receiving balls; and a resin portion formed through injection molding of a resin containing a solid lubricant with the body being set as an insert component. The resin portion includes: first parts formed along inner peripheral surfaces of the pocket holes of the body to form pocket surfaces to be held in sliding contact respectively with the balls; and a second part formed along an outer peripheral surface (or inner peripheral surface) of the body to form a guide surface to be held in sliding contact with an outer ring (or inner ring). The first parts and the second part are formed integrally with each other. Weld lines of the resin portion are formed at positions of avoiding exposure of the weld lines at both end portions of the pocket surfaces in a cage circumferential direction.

Rolling bearing cage, rolling bearing, and method of manufacturing rolling bearing cage

The present invention provides an electrically conductive polyethylene resin composition having a stable volume resistance value and in addition, a low-friction property and a wear-resistant property and a resin molding, a sliding bearing, and a sliding sheet made of the electrically conductive polyethylene resin composition. The electrically conductive polyethylene resin composition contains 100 parts by weight of ultra-high-molecular-weight polyethylene resin which cannot be injection-molded and has a weight average molecular weight of one million to four millions, 2 to 15 parts by weight of Ketjenblack, and 0.5 to 5 parts by weight of at least one powder, having an average particle size of 1 to 30 &#x3bc;m, which is selected from among polytetrafluoroethylene resin powder, graphite powder, and silicone resin powder.

Electrically conductive polyethylene resin composition, electrically conductive polyethylene resin molding, sliding bearing, and sliding sheet

A rolling bearing device includes inner races, outer races, rolling elements, a retainer, and an inner race spacer. The inner race spacer is formed of an oil reservoir member made of a sintered metal impregnated with lubricating oil, and a spacer cover fitted onto an outer periphery of the oil reservoir member. Through a centrifugal force to be applied to the oil reservoir member at the time of bearing rotation, the lubricating oil is scattered radially outward through a chamfered portion of the oil reservoir member via an oil supply passage, to thereby lubricate the interior of the bearing with oil.

Rolling bearing device

Electrically conductive polyethylene resin composition, electrically conductive polyethylene resin molding sliding bearing, and sliding sheet

The present invention provides a transfer charger which provides an intermediate transfer belt with a sufficient transfer efficiency, does not wear in contact with an inner surface of the intermediate transfer belt, has a low frictional property, and is excellent in its friction stability and an image-forming apparatus. A transfer charger () is mounted inside the image-forming apparatus where a toner image held on an image holder () is transferred to an intermediate transfer belt () to obtain an image. The transfer charger () makes a surface contact with an inner surface of the intermediate transfer belt (), with the transfer charger () being pressed toward the image holder () owing to a pressing member (). The transfer charger () is a sheet material consisting of a resin composition containing 100 parts by weight of non-injection-moldable ultra-high-molecular-weight polyethylene resin, 2 to 15 parts by weight of electrically conductive carbon, and 0.5 to 5 parts by weight of at least one powder selected from among PTFE resin powder, graphite powder, and silicone resin powder.

Growing community of inventors

Mie, Japan

Daichi Ito