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EP0117873A1 Expired / Lapsed EP ⏱️ 0.0 years remaining

Dynamic pressure type of fluid bearing device

Assignee: Panasonic Holdings Corp
•
Filing: 1983-09-02
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Granted: —
•
Expires: 2003-09-02
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Abstract

Abstract A dynamic pressure type of fluid bearing device has a housing (11) provided with a bearing hole (11a), a shaft (13) rotatably mounted in the hole (11a), and a thrust bearing member (12) mounted on the end face of the housing (11), grooves (13b) in the surface of either the shaft (13) or the hole (11a), grooves (12a) provided in the surface of the member (12) in contact with the shaft (13), a ventilation groove (12e) communicating with the atmosphere and formed on the surface of the member (12) in contact with the housing (11) and lubricating oil (14) provided around the periphery of the grooves (13b). This prevents the lubricating oil flowing out because of variations in the atmospheric pressure.

Inventors

  • 👤 Takafumi Asada
  • 👤 Toshio Onishi
  • 👤 Kajuyoshi Senma
  • 👤 Hideo Matsumoto

Bibliographic Details

Application Number —
Jurisdiction EP
Data Source google_patents
Last Synchronized 2026-11-01 04:35
CPC Classifications
F; F16; F16C; F16C17/00; F16C17/02; F16C17/04; F16C17/08; F16C17/10; F16C17/102; F16C17/107; F16C33/00; F16C33/02; F16C33/04; F16C33/06; F16C33/10; F16C33/102; F16C33/1025; F16C33/106; F16C33/107; F16C35/00; F16C35/02

Claims Analysis

Total Claims: 5
Claim 1
Independent Claim 92 words
A dynamic pressure type fluid bearing device consisting of a housing having a bearing hole, a shaft rotatably provided in this bearing hole, and a thrust bearing member attached to the end of the housing, wherein a groove is provided in either the shaft or the bearing hole, another groove is provided in the contacting surface between the thrust bearing member and the--shaft, a ventilation flute to communicate with the atmosphere is provided in the contacting surface between the thrust bearing member and the housing, and these grooves are filled with lubricant.
Claim 2
Dependent Claim 92 words
A dynamic pressure type fluid bearing device consisting of a housing having a bearing hole, a shaft rotatably provided in this bearing hole, and a thrust bearing member attached to the end of the housing, wherein a groove is provided in either the shaft or the bearing hole, another groove is provided in the contacting surface between the thrust bearing member and the--shaft, a ventilation flute to communicate with the atmosphere is provided in the contacting surface between the thrust bearing member and the housing, and these grooves are filled with lubricant.
Claim 3
Dependent Claim 28 words
A dynamic pressure type fluid bearing device as claimed in claim 1, wherein the ventilation flute is provided on the surface of thrust bearing member by etching process.
Claim 4
Dependent Claim 33 words
A dynamic pressure type fluid bearing device as claimed in claim 1, wherein the ventilation flute is provided on the surface of thrust bearing member by coining process by means of a press.
Claim 5
Dependent Claim 29 words
A dynamic pressure type fluid bearing device as claimed in claim 1, wherein a thin plate having a ventilation flute is provided between the housing and thrust bearing member.

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