US4674164A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Bearings with felted teflon liners and method for making same
Assignee: MADELEINE AS SCIL AGENT LLC
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Filing: 1981-03-05
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Granted: 1987-06-23
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Expires: 2001-03-05
Abstract
Abstract A bearing has a self-lubricating liner including sheets of felted polytetrafluoroethylene fibers impregnated with cured phenolic resin having no surface bonding to the fibers. Sheets of fibrous fabric are felted to sheets of felted fibers. Sintered particles are dispersed in the low friction surface of the liner. Liners are formed by air drying resin-impregnated sheets of felted fibrous material. The resin may be cured in a heated platen press before assembly of the bearing. The bearing is assembled by deforming bearing members to form an interference fit between the members and a bearing liner disposed therebetween. Parting compound applied to one of the bearing members prevents bonding of the liner to that member when the liner is baked to cure the resin and bond the liner to the other member. Bushes and bushings having self-lubricating linings are disclosed. Arbors and mandrels form an interference fit between the linings and bushes and bushings during assembly.
Inventors
- 👤 Albert R. McCloskey
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 19:57
CPC Classifications
F; F16; F16C; F16C33/00; F16C33/02; F16C33/04; F16C33/20; F16C33/201; F16C33/18; Y; Y10; Y10S; Y10S384/00; Y10S384/90; Y10S384/908; Y10S384/911; Y10S384/912; Y10T; Y10T29/00; Y10T29/49; Y10T29/49636; Y10T29/49643; Y10T29/49647; Y10T29/49668; Y10T29/4967; Y10T29/49826; Y10T29/4984; Y10T29/49845; Y10T29/49853; Y10T29/49885
Claims Analysis
Total Claims: 31
Claim 1
Independent Claim
134 words
A method of making bearings having low-friction surfaces comprising forming outer bearing members with inner bearing surfaces and inner bearing members with outer bearing surfaces, forming bearing liners with low-friction surfaces including adhesive resin dried to a tack-free B-stage, coating the bearing surfaces of one of the bearing members with parting compound, placing the bearing liners between the bearing surfaces of the bearing members, assembling the bearings, swaging the assembled bearings to provide an interference fit between the bearing liners and the bearing members, applying resin curing heat to the assembled bearings, curing the resin to thereby bond the bearing liners to the bearing members to which the parting compound was not applied, the parting compound inhibiting a bond between the bearing liners and the bearing members to which the parting compound is applied.
Claim 2
Independent Claim
134 words
A method of making bearings having low-friction surfaces comprising forming outer bearing members with inner bearing surfaces and inner bearing members with outer bearing surfaces, forming bearing liners with low-friction surfaces including adhesive resin dried to a tack-free B-stage, coating the bearing surfaces of one of the bearing members with parting compound, placing the bearing liners between the bearing surfaces of the bearing members, assembling the bearings, swaging the assembled bearings to provide an interference fit between the bearing liners and the bearing members, applying resin curing heat to the assembled bearings, curing the resin to thereby bond the bearing liners to the bearing members to which the parting compound was not applied, the parting compound inhibiting a bond between the bearing liners and the bearing members to which the parting compound is applied.
Claim 3
Dependent Claim
32 words
The method set forth in claim 1 further comprising impacting the assembled bearings to provide clearance between the bonded bearing liners and the bearing members to which the parting compound is applied.
Claim 4
Dependent Claim
34 words
The method set forth in claim 1 further comprising rolling the assembled bearings under pressure to provide clearance between the bonded bearing liners and the bearing members to which the parting compound is applied.
Claim 5
Dependent Claim
34 words
The method set forth in claim 1 comprising impacting and pressure rolling the assembled bearings to provide clearance between the bonded bearing liners and the bearing members to which the parting compound is applied.
Claim 6
Dependent Claim
59 words
The method set forth in claim 1 further comprising coating the bearing surfaces of the other of the bearing members with liquid adhesive resin before placing the bearing liners between the bearing surfaces of the bearing members, drying the liquid adhesive resin to a tack-free B-stage before placing the bearing liners between the bearing surfaces of the bearing members.
Claim 7
Dependent Claim
40 words
The method set forth in claim 1 further comprising cleaning the bearing surfaces of the other of the bearing members to render the bearing surfaces chemically clean before placing the bearing liners between the bearing surfaces of the bearing members.
Claim 8
Dependent Claim
52 words
The method set forth in claim 6 further comprising coating the bearing surfaces of the other of the bearing members with liquid adhesive resin after the bearing surfaces are cleaned, drying the liquid adhesive resin to a tack-free B-stage before placing the bearing liners between the bearing surfaces of the bearing members.
Claim 9
Dependent Claim
27 words
The method set forth in claim 7 wherein the bearing surfaces of the other of the bearing members are coated immediately after the bearing surfaces are cleaned.
Claim 10
Dependent Claim
32 words
The method set forth in claim 7 wherein the bearing surfaces of the other of bearing members are coated with adhesive resin identical to the adhesive resin included in the bearing liners.
Claim 11
Dependent Claim
33 words
The method set forth in claim 6 wherein the process of cleaning the bearing surfaces comprises sandblasting the bearing surfaces, washing the bearing surfaces, rinsing the bearing surfaces, and drying the bearing surfaces.
Claim 12
Dependent Claim
33 words
The method set forth in claim 6 wherein the process of cleaning the bearing surfaces comprises pickling the bearing surfaces, washing the bearing surfaces, rinsing the bearing surfaces, and drying the bearing surfaces.
Claim 13
Dependent Claim
49 words
The method set forth in claim 1 wherein the process of forming bearing liners with low-friction surfaces comprises applying liquid adhesive resin to sheets of felted fibrous material, impregnating the material with the resin drying the resin to a tack-free B-stage to form flexible sheetings having low friction surfaces.
Claim 14
Dependent Claim
60 words
The method set forth in claim 1 wherein the process of forming the bearing liners comprises forming flexible sheetings having low-friction surfaces, cutting the flexible sheetings to dimensions compatible with the dimensions of the bearing surfaces of the bearing members, coiling the sheetings into cylindrical shapes having dimensions compatible with the dimensions of the bearing surfaces of the bearing members.
Claim 15
Dependent Claim
46 words
The method set forth in claim 1 wherein the bearing liners comprise felted fibers in combination with dry resin having no surface bonding to the felted fibers, wherein the intertangled relationship of the felted fibers within the resin mechanically entraps the felted fibers in the resin.
Claim 16
Dependent Claim
19 words
The method set forth in claim 1 wherein the inner and outer bearing members are formed of metallic material.
Claim 17
Dependent Claim
49 words
The method set forth in claim 1 wherein the outer bearing members comprise cylindrical bearing members having concave inner bearing surface, and the inner bearing members comprise spherical bearing members having convex outer bearing surfaces that are complimentary to the concave inner bearing surfaces of the outer bearing members.
Claim 18
Dependent Claim
19 words
The method set forth in claim 16 wherein the inner and outer bearing members are formed of metallic material.
Claim 19
Dependent Claim
23 words
The method set forth in claim 1 wherein the outer bearing surfaces of the inner bearing members are coated with the parting compound.
Claim 20
Dependent Claim
21 words
The method set forth in claim 18 wherein the inner bearing members comprise spherical bearing members having convex outer bearing surfaces.
Claim 21
Dependent Claim
23 words
The method set forth in claim 1 wherein the inner bearing surfaces of the outer bearing members are coated with the parting compound.
Claim 22
Dependent Claim
21 words
The method set forth in claim 20 wherein the outer bearing members comprise cylindrical bearing members having concave inner bearing surfaces.
Claim 23
Independent Claim
119 words
A method of making bearings having low-friction surfaces comprising forming outer bearing members with inner bearing surfaces and inner bearing members with outer bearing surfaces, forming bearing liners with low-friction surfaces including cured adhesive resin, coating the bearing surfaces of one of the bearing members with liquid adhesive resin, drying the liquid adhesive resin to a tack-free B-stage, placing the bearing liners between the bearing surfaces of the bearing members, assembling the bearings, swaging the assembled bearings to provide an interference fit between the bearing liners and the bearing members, applying resin curing heat to the assembled bearings, curing the resin to thereby bond the bearing liners to the bearing members to which the liquid adhesive resin was applied.
Claim 24
Independent Claim
119 words
A method of making bearings having low-friction surfaces comprising forming outer bearing members with inner bearing surfaces and inner bearing members with outer bearing surfaces, forming bearing liners with low-friction surfaces including cured adhesive resin, coating the bearing surfaces of one of the bearing members with liquid adhesive resin, drying the liquid adhesive resin to a tack-free B-stage, placing the bearing liners between the bearing surfaces of the bearing members, assembling the bearings, swaging the assembled bearings to provide an interference fit between the bearing liners and the bearing members, applying resin curing heat to the assembled bearings, curing the resin to thereby bond the bearing liners to the bearing members to which the liquid adhesive resin was applied.
Claim 25
Dependent Claim
24 words
The method set forth in claim 20 wherein the inner bearing surfaces of the outer bearing members are coated with the liquid adhesive resin.
Claim 26
Dependent Claim
69 words
The method set forth in claim 22 further comprising coating one of the surfaces of the bearing liners with liquid adhesive resin before placing the bearing liners between the bearing surfaces of the bearing members, drying the liquid adhesive resin to a tack-free B-stage before placing the bearing liners between the bearing surfaces of the bearing members, the coated surfaces of the bearing liners and the bearing members juxtaposed.
Claim 27
Independent Claim
125 words
A method of making bushings having low-friction surfaces comprising forming bushing members with inner cylindrical bushing surfaces, forming bushing liners with low-friction surfaces including adhesive resin dried to a tack-free B-stage coating outer cylindrical surfaces of mandrels with parting compound, placing the bushing liners between the bushing surfaces of the bushing members and the outer cylindrical surfaces of the mandrels, inserting the mandrels in the bushing members, swagging the bushing members with the mandrels inserted therein to provide an interference fit between the bushing liners and the mandrels and bushing members, applying resin curing heat to the bushing liners, curing the resin to thereby bond the bushing liners to the bushing members, the parting compound inhibiting a bond between the bushing liners and the mandrels.
Claim 28
Independent Claim
125 words
A method of making bushings having low-friction surfaces comprising forming bushing members with inner cylindrical bushing surfaces, forming bushing liners with low-friction surfaces including adhesive resin dried to a tack-free B-stage coating outer cylindrical surfaces of mandrels with parting compound, placing the bushing liners between the bushing surfaces of the bushing members and the outer cylindrical surfaces of the mandrels, inserting the mandrels in the bushing members, swagging the bushing members with the mandrels inserted therein to provide an interference fit between the bushing liners and the mandrels and bushing members, applying resin curing heat to the bushing liners, curing the resin to thereby bond the bushing liners to the bushing members, the parting compound inhibiting a bond between the bushing liners and the mandrels.
Claim 29
Independent Claim
122 words
A method of making bushes having low-friction surfaces comprising forming bush members with outer cylindrical surfaces, forming bush overlays with low-friction surfaces including adhesive resin dried to a tack-free B-stage, coating inner cylindrical surfaces of arbors with parting compound, placing the bush overlays between the bush surfaces of the bush members and the inner cylindrical surfaces of the arbors, inserting the bush members in the arbors, pressing the bush members in the arbors to provide an interference fit between the bush overlays and the arbors and bush members, applying resin curing heat to the bush overlays, curing the resin to thereby bond the bush overlays to the bush members, the parting compound inhibiting a bond between the bush overlays and the arbors.
Claim 30
Independent Claim
122 words
A method of making bushes having low-friction surfaces comprising forming bush members with outer cylindrical surfaces, forming bush overlays with low-friction surfaces including adhesive resin dried to a tack-free B-stage, coating inner cylindrical surfaces of arbors with parting compound, placing the bush overlays between the bush surfaces of the bush members and the inner cylindrical surfaces of the arbors, inserting the bush members in the arbors, pressing the bush members in the arbors to provide an interference fit between the bush overlays and the arbors and bush members, applying resin curing heat to the bush overlays, curing the resin to thereby bond the bush overlays to the bush members, the parting compound inhibiting a bond between the bush overlays and the arbors.
Claim 31
Dependent Claim
38 words
The method set forth in claim 1 wherein the process of curing the resin contracts the bearing liner to thereby provide clearance between the bonded bearing liners and the bearing members to which the parting compound is applied.
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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) | 1990-06-22 | 1990-12-22 | 1991-06-23 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1994-06-22 | 1994-12-22 | 1995-06-23 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1998-06-22 | 1998-12-22 | 1999-06-23 | $7700.00 | Window Closed / Lapsed |