Patent US2406947A successfully refreshed from Google Patents.
US3804479A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Low friction fabric-lined bearings and improved fabric therefor
Assignee: Rexnord Inc
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Filing: 1972-12-21
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Granted: 1974-04-16
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Expires: 1992-12-21
Abstract
Abstract Unblended yarns are constructed and woven with other yarns to form a mixed fabric which is particularly suitable for use as the liner for resin bodied annular bearings which are subject to reversing loads, that is where one bearing element oscillates relative to the other or relative rotation or movement of the bearing elements regularly reverses in direction. More particularly, yarn of Teflon filaments and yarn of bondable filaments are woven in a 1 X 1 plain weave so that the filaments are just sufficiently loose to allow the capillary action of the liquid resin to thoroughly impregnate the fabric in the manufacture of the bearing and anchor the Teflon filaments to prevent their being worked loose from the resin by the reversing loads.
Inventors
- 👤 N Butzow
- 👤 B Harris
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 20:31
CPC Classifications
F; F16; F16C; F16C33/00; F16C33/02; F16C33/04; F16C33/20; F16C33/201; F16C33/24
Claims Analysis
Total Claims: 6
Claim 1
Independent Claim
78 words
A fabric sleeve for shrinking over a mandrel and embedding in a hardenable material to form the bearing face of a low-friction device, said fabric being of a 1 X 1 weave and comprising between 80 and 90 ends and between 50 and 60 picks per inch, each warp yarn being of Teflon filaments with minimum twist in the order of 400 denier and each filling yarn being of Dacron filaments and in the order of 200 denier.
Claim 2
Dependent Claim
116 words
In a journal bearing which comprises a thermoset resin body having wound filaments for internal reinforcing and a fabric embedded therein at and to form the bearing face, said fabric being of a 1 X 1 weave and woven in the form of a sleeve and having longitudinal warp yarns of low-friction filaments of a material such as Teflon and a circumferential filling yarn of filaments of a heat-shrinkable and bondable material such as Dacron, the cross-section and spacing of said filling yarns being about two-thirds that of the warp yarns whereby the filling yarns are substantially uncrimped and the warp yarns forming the bearing face appear as ros of relatively small squares of nominal spacing.
Claim 3
Dependent Claim
170 words
In a journal bearing which comprises a thermoset resin body having wound filaments for internal reinforcing and a fabric embedded therein at and to form the bearing face, said fabric being of a 1 X 1 weave and woven in the form of a sleeve and having longitudinal warp yarns of low-friction filaments of a material such as Teflon and circumferential filling yarns of filaments of a heat-shrinkable and bondable material such as Dacron, said bearing of the type wherein the fabric is held against a mandrel by the tension of the filling yarns upon heat-shrinking such that at spaced points the filling yarns cross-over and press alternate warp yarns against the mandrel and at intermediate points the filling yarns extend between alternate warp yarns and the resin-mandrel face of the bearing, the relative sizes and spacing of the warp and filling yarns being such that between said spaced points the filling yarns bridge the alternate warp yarns aNd support themselves some distance from the resin-mandrel face of the bearing.
Claim 4
Dependent Claim
65 words
The bearing of claim 3 which is in the form of a cylinder and wherein the Teflon yarns on the other face of the fabric form similar rows of diagonally arranged projections and the reinforcing filaments are wound in a spiral so that a significant number of said filaments lie between such projections to firmly anchor the fabric in the resin body of the bearing.
Claim 5
Dependent Claim
71 words
The bearing of claim 4 which is in the form of a cylinder and wherein the warp yarn forming the other face of the fabric includes projections which are spaced axially and circumferentially on parallel diagonal lines and the internal reinforcing filaments are wound in a spiral so that a significant number of said filaments lie between such projections to firmly anchor the fabric in the resin body of the bearing.
Claim 6
Dependent Claim
102 words
In a journal bearing which comprises a reinforced thermoset resin body and a fabric embedded therein at and to form the bearing face, said fabric being woven with a 1 X 1 weave and having longitudinal warp yarns of low-friction filaments of a material such as Teflon and a circumferential filling yarn of filaments of a bondable material such as Dacron, the cross-section and spacing of said filling yarns being about two-thirds that of the warp yarns whereby the filling yarns are substantially uncrimped and the warp yarns forming the bearing face appear as rows of relatively small squares of nominal spacing.
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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) | 1977-04-15 | 1977-10-15 | 1978-04-16 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1981-04-15 | 1981-10-15 | 1982-04-16 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1985-04-15 | 1985-10-15 | 1986-04-16 | $7700.00 | Window Closed / Lapsed |