Patent US3815468A successfully refreshed from Google Patents.
US3815468A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Braided fabric bearing liner
Assignee: Torrington Co Ltd
•
Filing: 1972-01-20
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Granted: 1974-06-11
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Expires: 1992-01-20
Abstract
Abstract Improved wear and load-carrying properties result for a resinimpregnated braided-fabric bearing wherein the bearing surface includes, as the most significant fabric component, threads which in the aggregate present at the bearing surface TFE filaments and high-temperature nylon filaments in the proportion of less than 50 percent TFE by volume. The threads are the result of winding, substantially without twisting, of strands which are fully washable, to remove sizing down to the innermost filaments. This enables full impregnation of the fabric with synthetic resin, and curing in substantially intimate and continuous and void-free relation of the resin to all filaments within the threads of the fabric.
Inventors
- 👤 R Matt
- 👤 T Rolland
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 15:35
CPC Classifications
F; F16; F16C; F16C33/00; F16C33/02; F16C33/04; F16C33/20; F16C33/201; Y; Y10; Y10S; Y10S384/00; Y10S384/90; Y10S384/911
Claims Analysis
Total Claims: 13
Claim 1
Independent Claim
39 words
A braided fabric according to claim 1, in which each of the combined threads in said fabric is the same, with a strand of the TFE in side-by-side relation with said integer multiple of adjacent strands of the nylon.
Claim 2
Dependent Claim
28 words
A braided fabric according to claim 2, in which each of said combined threads is a blend in which the TFE strand is one end of 1,200-denier TFE.
Claim 3
Dependent Claim
20 words
A braided fabric according to claim 3, in which each of the nylon strands comprises two ends of 200-denier nylon.
Claim 4
Dependent Claim
22 words
A braided fabric according to claim 4, in which each thread comprises one strand of TFE and three strands of the nylon.
Claim 5
Dependent Claim
14 words
A braided fabric according to claim 1, in which said integer multiple is three.
Claim 6
Dependent Claim
83 words
A braided fabric according to claim 1, in which a first number of the combined threads in said fabric are all-TFE, being in said plurality and in side-by-side relation, and in which a second number of the combined threads in said fabric are all-nylon, being in said plurality and in side-by-side relation, said second number being an integer multiple of said first number, and the threads of said first number being uniformly distributed in interlaced relation with the threads of said second number.
Claim 7
Dependent Claim
20 words
A braided fabric according to claim 7, in which each thread of the TFE comprises two strands of 1,200-denier TFE.
Claim 8
Dependent Claim
30 words
A braided fabric according to claim 8, in which each thread of the nylon comprises two strands, each of said nylon strands comprising two ends of 200-denier nylon twisted together.
Claim 9
Dependent Claim
21 words
A braided fabric according to claim 9, in which all nylon threads are oriented in the same direction of helical advance.
Claim 10
Dependent Claim
22 words
A braided fabric according to claim 10, in which nylon and TFE threads are equally interlaced for said direction of helical advance.
Claim 11
Dependent Claim
31 words
A low-friction bearing comprising the fabric of claim 1 consolidated into a backing which includes cured hardenable resin material permeating said strands and exposing filaments on one side of said fabric.
Claim 12
Dependent Claim
31 words
The method of making the fabric of claim 1, wherein said strands are combined into threads by winding onto a carrier in substantially an untwisted relation of strands to each other.
Claim 13
Dependent Claim
225 words
A braided low-friction bearing fabric wherein a first filamentary stranding and a second filamentary stranding are interlaced in oppositely inclined directions of advance with respect to a general longitudinal direction of braid advance; said braid being so characterized for each interval of interlace that the number and volumetric bulk of plural strands in said first direction are equal to the number and substantial volumetric bulk of the strands in said second direction, and that at least one of said strands is primarily TFE filaments while the remainder of said strands are of a high-temperature nylon, the number of said remainder strands exceeding the number of said TFE strands, the strands of each set of plural strands being in side-by-side untwisted relation so that for each interlace each strand is presented without interruption at the fabric surface; whereby assurance is obtained that for each period of interlace the fabric surface is characterized by the same proportion, orientation and disposition of TFE filaments to nylon filament, so that when consolidated with a cured impregnant resin wherein the fabric surface conforms to and defines a bearing interface, a source of TFE is available for total interface lubrication no matter what the direction or amplitude of bearing movement at the interface as long as such movement is at least in the order of maGnitude of the interval of interlace.
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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) | 1977-06-10 | 1977-12-10 | 1978-06-11 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1981-06-10 | 1981-12-10 | 1982-06-11 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1985-06-10 | 1985-12-10 | 1986-06-11 | $7700.00 | Window Closed / Lapsed |