US3769672A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method of making an improved teflon-lined spherical bearing
Assignee: United States Department of the Air Force
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Filing: 1972-07-31
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Granted: 1973-11-06
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Expires: 1992-07-31
Abstract
Abstract A method of repairing and retrofitting the teflon fabric liner of a spherical and/or self-aligning bearing, that has separated due to poor bonding with the bearing surface, with a metalbacked, teflon liner that includes a metal backing and a teflon skiving heat and pressure bonded thereto, and reinforced with a mechanical interlock. The metal-backed, teflon liner is initially formed into two hemispherical liner sections each inserted in position in the spherical cavity of the bearing-outer race member.
Inventors
- 👤 P Eklund
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 18:59
CPC Classifications
F; F16; F16C; F16C23/00; F16C23/02; F16C23/04; F16C23/043; F16C23/045; B; B23; B23P; B23P6/00; Y; Y10; Y10T; Y10T29/00; Y10T29/49; Y10T29/49636; Y10T29/49638; Y10T29/49643; Y10T29/49647; Y10T29/49648; Y10T29/49655; Y10T29/49718; Y10T29/49721; Y10T29/4973
Claims Analysis
Total Claims: 6
Claim 1
Independent Claim
41 words
In a method of repairing or retrofitting a teflon fabric-lined spherical bearing as in claim 1, and second mechanical interlocking means engaged between each of the metal/teflon-hemispherical liner laminates and the bearing-outer race member to thereby reinforce the sealed relation therebetween.
Claim 2
Dependent Claim
38 words
In a method of repairing or retrofitting a teflon fabric-lined spherical bearing as in claim 1, wherein the step of forming a basic teflon laminated structure further comprises forming a thin teflon skiving from a teflon impregnated cloth.
Claim 3
Dependent Claim
39 words
In a method of repairing or retrofitting a teflon fabric-lined spherical bearing as in claim 1, wherein the step of forming a basic teflon laminated structure further comprises forming a thin teflon skiving from a metal-filled teflon composite lamina.
Claim 4
Dependent Claim
28 words
In a method of repairing or retrofitting a teflon fabric-lined spherical bearing as in claim 4, wherein the thin teflon skiving may comprise a bronze-filled, teflon composite lamina.
Claim 5
Dependent Claim
89 words
In a method of repairing or retrofitting a teflon fabric-lined spherical bearing as in claim 1, wherein the step of separately installing each metal/teflon-hemispherical liner laminate further includes the additional steps of initially rotating the bearing-ball member to its outer position; then mounting each hemispherical liner laminate in opposed relation on the ball member; and thereafter returning the ball member to its inner position to thereby bring each of the pair of hemispherical liner laminates into the appropriate register position with the spherical cavity of the outer race member.
Claim 6
Dependent Claim
83 words
In a method of repairing or retrofitting a teflon fabric-lined spherical bearing as in claim 1, wherein the step of separately installing each hemispherical liner laminate further includes the additional steps of providing the bearing-outer race member with a pair of removable elements at opposed positions therewithin and oriented immediately adjacent to, and thereby operative to respectively lock and facilitate the removal of the teflon fabric-liner to be replaced and installation of the metal/teflon-hemispherical liner laminates without any rotation of the bearing-ball member.
References Cited (Backward Citations)
US3059318A
Cited
US3562885A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1976-11-05 | 1977-05-07 | 1977-11-06 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-11-05 | 1981-05-07 | 1981-11-06 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-11-05 | 1985-05-07 | 1985-11-06 | $7700.00 | Window Closed / Lapsed |