US3971598A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Structural bearings
Assignee: Federal Mogul Engineering Ltd
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Filing: 1974-04-04
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Granted: 1976-07-27
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Expires: 1994-04-04
Abstract
Abstract This invention is a bridge- or structure- bearing enabling an upper member to be supported from a base by a sliding bearing permitting universal freedom of angular movement of the upper member. A low-friction bearing surface is provided by a P.T.F.E. layer located in relation to the base by having its edges engaged in a groove machined in the base around the bearing surface.
Inventors
- 👤 Sydney James Rudge
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 06:11
CPC Classifications
E; E01; E01D; E01D19/00; E01D19/04; E01D19/042; E01D19/046
Claims Analysis
Total Claims: 10
Claim 1
Independent Claim
100 words
A structure bearing comprising (1) an upper member, (2) a base member having a part sherical upwardly facing bearing surface supporting said upper member, there being a groove formed in said base member near the top and extending from said part spherical bearing surface substantially horizontally into said base member, and (3) a bearing layer supported on said bearing surface and fixed in position by having its edges engaged in said groove, said bearing layer engaging the upper member in such a manner as to permit universal freedom of angular movement of said upper member relative to the base member.
Claim 2
Dependent Claim
100 words
A structure bearing comprising (1) an upper member, (2) a base member having a part sherical upwardly facing bearing surface supporting said upper member, there being a groove formed in said base member near the top and extending from said part spherical bearing surface substantially horizontally into said base member, and (3) a bearing layer supported on said bearing surface and fixed in position by having its edges engaged in said groove, said bearing layer engaging the upper member in such a manner as to permit universal freedom of angular movement of said upper member relative to the base member.
Claim 3
Dependent Claim
18 words
A structure bearing as claimed in claim 1 in which the bearing layer comprises a sheet of Poly-tetra-fluoro-ethylene.
Claim 4
Dependent Claim
20 words
A structure bearing as claimed in claim 1 including a dirt-preventing sealing ring around the edge of the bearing layer.
Claim 5
Dependent Claim
34 words
A structure bearing as claimed in claim 1 in which the layer has a hole for the escape of air from between the base and the layer as the layer is put into position.
Claim 6
Dependent Claim
20 words
A structure bearing as claimed in claim 2 in which there is an adhesive between the layer and the base.
Claim 7
Dependent Claim
33 words
A structure bearing as claimed in claim 3 in combination with an upper member having a lower surface corresponding to that of the layer and capable of movement with respect to the layer.
Claim 8
Dependent Claim
22 words
A structure bearing as claimed in claim 6 including clamping means temporarily holding the base and the upper member against relative movement.
Claim 9
Dependent Claim
24 words
A structure bearing as claimed in claim 1, in which the layer is deformed through an overcenter position to conform with the bearing surface.
Claim 10
Dependent Claim
18 words
A structure bearing as claimed in claim 8, in which the layer has been heated before being deformed.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1979-07-27 | 1980-01-26 | 1980-07-27 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1983-07-27 | 1984-01-26 | 1984-07-27 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1987-07-27 | 1988-01-26 | 1988-07-27 | $7700.00 | Window Closed / Lapsed |