EP0141476A1
Expired / Lapsed
EP
⏱️ 0.0 years remaining
Metal-lubricated helical-groove bearing comprising an anti-wetting layer
Assignee: Koninklijke Philips NV
•
Filing: 1984-11-05
•
Granted: —
•
Expires: 2004-11-05
Abstract
Abstract In order to prevent the escape of metal lubricant in a helical-groove bearing, the helical-groove bearing is provided with an antiwetting layer on the surfaces which adjoin the helically grooved surfaces and which could act as a creepage path for the metal lubricant. An extremely accurate definition of the bearing portions to be wetted by the lubricant is also obtained by means of these layers. Thus, more complex bearings can also be locally provided with a metal lubricant.
Inventors
- 👤 Jan Gerkema
- 👤 Jozef Bernardus Pelzer
Bibliographic Details
Application Number
—
Jurisdiction
EP
Data Source
google_patents
Last Synchronized
2026-11-06 10:45
CPC Classifications
H; H01; H01J; H01J35/00; H01J35/02; H01J35/04; H01J35/08; H01J35/10; H01J35/101; H01J35/1017; H01J35/104; H01J2235/00; H01J2235/10; H01J2235/1046; H01J2235/106; H01J2235/1066; Y; Y10; Y10S; Y10S384/00; Y10S384/90; Y10S384/912
Claims Analysis
Total Claims: 9
Claim 1
Independent Claim
50 words
A device comprising a helical-groove bearing with a liquid metal lubricant, characterized in that surface areas of the bearing which adjoin the bearing surfaces and which could form a part of a creepage path for the lubricant are locally provided with an anti- wetting layer for repelling the metal lubricant.
Claim 2
Independent Claim
50 words
A device comprising a helical-groove bearing with a liquid metal lubricant, characterized in that surface areas of the bearing which adjoin the bearing surfaces and which could form a part of a creepage path for the lubricant are locally provided with an anti- wetting layer for repelling the metal lubricant.
Claim 3
Dependent Claim
19 words
A device as claimed in Claim 1, characterized in that the anti- wetting layer consist mainly of titanium oxide.
Claim 4
Dependent Claim
20 words
A device as claimed in Claim 1 or 2, characterized in that the lubricant contains a Ga, In, Sn alloy.
Claim 5
Dependent Claim
31 words
A device as claimed in Claim 1, 2 or 3, characterized in that the titanium oxide is deposited in the form of titanium acetylacetonate dissolved in isopropanol, and is subsequently reduced.
Claim 6
Independent Claim
32 words
A device as claimed in any of the preceding Claims, characterized in that the anti-wetting layer is deposited before the bearing is subjected to a reducing high-temperature treatment in a reducing atmosphere.
Claim 7
Independent Claim
32 words
A device as claimed in any of the preceding Claims, characterized in that the helical-groove bearing forms part of an X-ray tube which comprises a rotary anode which rotates in said bearing.
Claim 8
Independent Claim
30 words
A device as claimed in any of the preceding Claims, characterized in that. the helical-groove bearing forms part of a microwave tube ccmprising an electrode which rotates in said bearing.
Claim 9
Independent Claim
50 words
A device as claimed in any of the preceding Claims, characterized in that for the wetting of comparatively complex tearing surfaces, the bearing is first provided with an anti-wetting layer on surface areas which bound the bearing surfaces, after which the bearing is provided with a metal lubricant by immersion.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
Maintenance schedule is calculated for granted US utility patents.