Polyfluorocarbon coated metal bearing

• US 5,573,846 A
• Filed: 12/08/1993
• Issued: 11/12/1996
• Est. Priority Date: 10/24/1991
• Status: Expired due to Term

• Current Assignee: Norton Pampus GmbH (Compagnie de Saint-Gobain SA)
• Original Assignee: Norton Pampus GmbH (Compagnie de Saint-Gobain SA)
• Inventors: Petit, Dominique, Harig, Friedrich
• Primary Examiner(s): WATKINS III, WILLIAM P
• Application Number:
  US08/164,668
• Time in Patent Office: 1,070 Days
• Field of Search: 428/138, 428/463, 428/141, 428/520, 428/515, 428/522, 428/325, 428/323, 428/327, 428/329, 428/220, 428/335, 428/473.5, 428/421, 428/422, 384/908, 384/909, 252/12, 252/12.2
• US Class Current: 428/323
• CPC Class Codes: F16C 33/201 Composition of the plastic
• CPC Class Codes: Y10S 384/908 Nylon or polytetrafluorethylene
• CPC Class Codes: Y10S 384/909 Plastic
• CPC Class Codes: Y10T 428/24331 including nonapertured component
• CPC Class Codes: Y10T 428/24355 Continuous and nonuniform or irregular surface on layer or component [e.g., roofing, etc.]
• CPC Class Codes: Y10T 428/25 Web or sheet containing structurally defined element or component and including a second component containing structurally defined particles
• CPC Class Codes: Y10T 428/252 Glass or ceramic [i.e., fired or glazed clay, cement, etc.] [porcelain, quartz, etc.]
• CPC Class Codes: Y10T 428/254 Polymeric or resinous material
• CPC Class Codes: Y10T 428/257 Iron oxide or aluminum oxide
• CPC Class Codes: Y10T 428/264 Up to 3 mils
• CPC Class Codes: Y10T 428/3154 Of fluorinated addition polymer from unsaturated monomers
• CPC Class Codes: Y10T 428/31544 Addition polymer is perhalogenated
• CPC Class Codes: Y10T 428/31699 Ester, halide or nitrile of addition polymer
• CPC Class Codes: Y10T 428/31721 Of polyimide
• CPC Class Codes: Y10T 428/31909 Next to second addition polymer from unsaturated monomers
• CPC Class Codes: Y10T 428/31928 Ester, halide or nitrile of addition polymer
• CPC Class Codes: Y10T 428/31935 Ester, halide or nitrile of addition polymer

Abstract

A maintenance-free sliding bearing composed of a metal support and a layer which is directly applied thereto and which consists of a copolymer of ethylene-tetrafluoroethylene forming an intermediate layer to which a second sliding layer of plastics is applied.

Claims

1. A maintenance-free sliding bearing comprising a metal support layer, an intermediate layer which is directly applied thereto by pressure and heat and which consists of a copolymer of ethylene--tetrafluoroethylene, and a sliding layer of plastic, wherein the intermediate layer and the sliding layer resist delamination from the metal support layer at shear forces of 77 to 125 N/cm² at 100°

C.

2. The sliding bearing of claim 1, wherein the sliding layer is 0.125 to 1.5 mm in thickness.

3. The sliding bearing of claim 1, wherein the metal support layer has a smooth surface.

4. The sliding bearing of claim 1, wherein the metal support layer has a roughened surface.

5. The sliding bearing of claim 1, wherein the metal support layer is made of steel.

6. The sliding bearing of claim 1, wherein the sliding layer is a plastic sheet which is air-permeable.

7. The sliding bearing of claim 1, wherein the sliding layer is selected from the group consisting of polytetrafluoroethylene, polyimide and polyether ketone, and combinations thereof.

8. The sliding bearing of claim 1, wherein at least one filler selected from the group consisting of carbon, graphite, aluminum oxide, ceramic materials, glass, bronze, molybdenum sulphide, and combinations thereof, is added to the sliding layer.

9. The sliding bearing of claim 8, comprising 1 to 40%, by weight, filler.

10. The sliding bearing of claim 9, comprising 5 to 30%, by weight, filler.

11. The sliding bearing of claim 8, wherein at least one filler is added to the sliding layer to improve the sliding bearing in at least one characteristic selected from the group consisting of reinforcement, thermal conductivity, and wear resistance of the sliding bearing.

13. The sliding bearing of claim 8, wherein the ceramic material is silicon carbide.

12. A maintenance-free sliding bearing comprising a metal support layer;

an intermediate layer which is directly applied thereto by pressure and heat consisting of a copolymer of ethylene--tetrafluoroethylene, and at least one filler selected from the group consisting of carbon, aluminum oxide, ceramic materials, glass, bronze, molybdenum sulphide, and combinations thereof, and a sliding layer of plastic, wherein the intermediate layer and the sliding layer resist delamination from the metal support layer at shear forces of 77 to 125 N/cm² at 100°

C.

14. The sliding bearing of claim 12, wherein the ceramic material is silicon carbide.