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NTIS 바로가기국가/구분 | United States(US) Patent 등록 |
---|---|
국제특허분류(IPC7판) |
|
출원번호 | US-0172591 (1988-03-24) |
우선권정보 | DE-3709836 (1987-03-25) |
발명자 / 주소 |
|
인용정보 | 피인용 횟수 : 38 인용 특허 : 4 |
A friction bearing suitable for use with well drilling tools which includes a trace ring with a sliding surface formed of a plurality of sintered molded bodies countersunk to be flushed with the surface of the ring, and arranged side by side in a mosaic pattern to define a ring channel with an essen
Friction bearing for well drilling tools, with a trace ring and a bearing ring where the bearing ring has bearing segments supported on the sliding face of said trace ring and the trace ring has a bearing body with a bearing material that is hard and wear resistant, characterized by the fact that th
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