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US Patent 7726881 Hydrodynamic bearing device

Patent 7726881 was granted and assigned to Panasonic on June, 2010 by the United States Patent and Trademark Office.

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Patent abstract

A hydrodynamic bearing device is provided for use with a spindle motor. The hydrodynamic bearing device has a sleeve made of a sintered metal that is obtained by sintering a sintering material that is iron, an iron alloy, copper, a copper alloy or a mixture thereof. This sintered metal has independent pores, which do not communicate with each other, by selecting conditions for forming a desired sintered body within a predetermined range. The conditions includes a grain size of powdered metal of a material for the sintered metal, a molding pressure when the molded body is formed, sintering temperature and sintering period in the sintering step.

Edits on 22 May, 2023
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edited on 22 May, 2023
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US Patent 07726881 Hydrodynamic bearing device US Patent 7726881 Hydrodynamic bearing device

Infobox
Patent Number
0772688100
Patent Number
772688100
Edits on 21 May, 2023
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edited on 21 May, 2023
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Infobox
Official Website
https://pdfpiw.uspto.gov/.piw?Docid=0772688100
Edits on 8 Apr, 2023
"Entity importer update"
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edited on 8 Apr, 2023
Infobox
Is a
Patent
Patent
0
Current Assignee
Panasonic
Panasonic
0
Patent Jurisdiction
United States Patent and Trademark Office
United States Patent and Trademark Office
0
Patent Number
077268810
Date of Patent
June 1, 2010
0
Patent Application Number
123935420
Date Filed
February 26, 2009
0
Official Website
https://pdfpiw.uspto.gov/.piw?Docid=077268810
Patent Primary Examiner
‌
Marcus Charles
0
Edits on 27 Sep, 2022
"Entity importer update"
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Golden AI
edited on 27 Sep, 2022
Infobox
Is a
Patent
Patent
0
Current Assignee
Panasonic
Panasonic
0
Patent Jurisdiction
United States Patent and Trademark Office
United States Patent and Trademark Office
0
Patent Number
077268810
Date of Patent
June 1, 2010
0
Patent Application Number
123935420
Date Filed
February 26, 2009
0
Official Website
https://pdfpiw.uspto.gov/.piw?Docid=077268810
Patent Primary Examiner
‌
Marcus Charles
0
Edits on 18 Jun, 2022
"Entity importer update"
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Golden AI
edited on 18 Jun, 2022
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Infobox (+1 properties)
Infobox
Website URL
https://pdfpiw.uspto.gov/.piw?Docid=07726881
Edits on 4 Dec, 2021
"Created via: Entity Importer"
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Golden AI
created this topic on 4 Dec, 2021
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 US Patent 07726881 Hydrodynamic bearing device

Infobox
Is a
Patent
Patent
Current assignee
Panasonic
Panasonic
Patent jurisdiction
United States Patent and Trademark Office
United States Patent and Trademark Office
Patent number
07726881
Date of patent
June 1, 2010
Patent application number
12393542
Date Filed
February 26, 2009
Patent primary examiner
‌
Marcus Charles

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