US5433870A
Expired / Lapsed
US
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Multilayered sliding member
Assignee: Oiles Corp
•
Filing: 1993-09-23
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Granted: 1995-07-18
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Expires: 2013-09-23
Abstract
Abstract Disclosed herein is a multilayered sliding member comprising a lubricating composition comprising polytetrafluoroethylene and 1 to 40 wt % of (i) zinc oxide whiskers or (ii) zinc oxide whiskers and fibrous magnesium oxysulfate, fan-shaped magnesium oxysulfate or a mixture thereof used as a filler; and a porous sintered metal layer formed on a steel backing, the lubricating composition being impregnated in and coated on the porous sintered metal layer formed on a steel backing.
Inventors
- 👤 Takashi Nakamaru
- 👤 Tadashi Watai
- 👤 Akihiko Okimura
- 👤 Sumihide Yanase
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 10:48
CPC Classifications
F; F16; F16C; F16C33/00; F16C33/02; F16C33/04; F16C33/20; F16C33/201; C; C08; C08K; C08K3/00; C08K3/18; C08K3/20; C08K3/22; C08K7/00; C08K7/02; C08K7/04; C08K7/08; F16C33/203; F16C33/206
Claims Analysis
Total Claims: 20
Claim 1
Independent Claim
65 words
A multilayered sliding member comprising a lubricating composition comprising polytetrafluoroethylene and 1 to 40 wt % of zinc oxide whiskers and fibrous magnesium oxysulfate, fan-shaped magnesium oxysulfate or a mixture thereof used as a filler, and a porous sintered metal layer formed on a steel backing, the lubricating composition being impregnated in and coated on the porous sintered metal layer formed on a steel backing.
Claim 2
Dependent Claim
65 words
A multilayered sliding member comprising a lubricating composition comprising polytetrafluoroethylene and 1 to 40 wt % of zinc oxide whiskers and fibrous magnesium oxysulfate, fan-shaped magnesium oxysulfate or a mixture thereof used as a filler, and a porous sintered metal layer formed on a steel backing, the lubricating composition being impregnated in and coated on the porous sintered metal layer formed on a steel backing.
Claim 3
Dependent Claim
27 words
The multilayered sliding member according to claim 1, wherein the lubricating composition further contains not more than 30 wt % of a fluorine resin other than polytetrafluoroethylene.
Claim 4
Dependent Claim
42 words
The multilayered sliding member according to claim 1, wherein the lubricating composition further contains as a metallic filler not more than 30 wt % of at least one member selected from the group consisting of lead, zinc, tin, copper and alloys thereof.
Claim 5
Dependent Claim
18 words
The multilayered sliding member according to claim 1, wherein the zinc oxide whiskers have a tetrapod-like three-dimensional structure.
Claim 6
Dependent Claim
31 words
The multilayered sliding member according to claim 1, wherein the amount of the fibrous magnesium oxysulfate, the fan-shaped magnesium oxysulfate or a mixture thereof is not more than 20 wt %.
Claim 7
Dependent Claim
19 words
The multilayered sliding member according to claim 2, wherein the amount of polytetrafluoroethylene is 50 to 99 wt %.
Claim 8
Dependent Claim
19 words
The multilayered sliding member according to claim 3, wherein the amount of polytetrafluoroethylene is 40 to 99 wt %.
Claim 9
Dependent Claim
28 words
The multilayered sliding member according to claim 2, wherein the fluorine resin is tetrafluoroethylene-perfluoroalkylvinyl ether copolymer, tetrafluoroethylene-hexafluoropropylene copolymer, tetrafluoroethylene-ethylene copolymer, polychlorotrifluoroethylene, chlorotrifluoroethylene-ethylene copolymer, polyvinylidene fluoride or polyvinyl fluoride.
Claim 10
Dependent Claim
22 words
The multilayered sliding member according to claim 3, wherein the average particle diameter of the metallic filler is 10 to 80 μm.
Claim 11
Dependent Claim
103 words
The multilayered sliding member according to claim 1, wherein the lubricating composition comprises polytetrafluoroethylene, 1 to 40 wt % of zinc oxide whiskers and fibrous magnesium oxysulfate, fan-shaped magnesium oxysulfate or a mixture thereof as a first filler, and not more than 20 wt % of at least one member selected from the group consisting of magnesium oxide, magnesium hydroxide, magnesium carbonate, magnesium silicate, zinc oxide, zinc carbonate, zinc sulfide, calcium fluoride, sodium fluoride, fluorine-contained mica and barium sulfate as a second filler, the total amount of the first and second fillers in the lubricating composition being not more than 40 wt %.
Claim 12
Dependent Claim
27 words
The multilayered sliding member according to claim 10, wherein the lubricating composition also contains not more than 30 wt % of a fluorine resin other than polytetrafluoroethylene.
Claim 13
Dependent Claim
42 words
The multilayered sliding member according to claim 10, wherein the lubricating composition also contains as a metallic filler not more than 30 wt % of at least one member selected from the group consisting of lead, zinc, tin, copper and alloys thereof.
Claim 14
Dependent Claim
18 words
The multilayered sliding member according to claim 10, wherein the zinc oxide whiskers have a tetrapod-like three-dimensional structure.
Claim 15
Dependent Claim
31 words
The multilayered sliding member according to claim 10, wherein the content of the fibrous magnesium oxysulfate, the fan-shaped magnesium oxysulfate or a fixture thereof is not more than 20 wt %.
Claim 16
Dependent Claim
19 words
The multilayered sliding member according to claim 11, wherein the content of polytetrafluoroethylene is 50 to 99 wt %.
Claim 17
Dependent Claim
19 words
The multilayered sliding member according to claim 12, wherein the content of polytetrafluoroethylene is 40 to 99 wt %.
Claim 18
Dependent Claim
23 words
The multilayered sliding member according to claim 10, wherein the average particle diameter of the second filler is not more than 20 μm.
Claim 19
Dependent Claim
28 words
The multilayered sliding member according to claim 11, wherein the fluorine resin is tetrafluoroethylene-perfluoroalkylvinyl ether copolymer, tetrafluoroethylene-hexafiuoropropylene copolymer, tetrafluoroethylene-ethylene copolymer, polychlorotrifluoroethylene, chlorotrifluoroethylene-ethylene copolymer, polyvinylidene fluoride or polyvinyl fluoride.
Claim 20
Dependent Claim
22 words
The multilayered sliding member according to claim 12, wherein the average particle diameter of the metallic filler is 10 to 80 μm.
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1998-07-17 | 1999-01-16 | 1999-07-18 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 2002-07-17 | 2003-01-16 | 2003-07-18 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2006-07-17 | 2007-01-16 | 2007-07-18 | $7700.00 | Window Closed / Lapsed |