Patent US3782789A successfully refreshed from Google Patents.
US3782789A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Tiltable bearing, especially for bridges
Assignee: Kober AG Glarus
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Filing: 1971-12-21
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Granted: 1974-01-01
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Expires: 1991-12-21
Abstract
Abstract The present tiltable bearing for heavy structures such as bridges has a load supporting piston which extends into a space confining pot into which is inserted a yielding pressure material, such as a rubber cushion, on which the piston rests. For preventing the escape of the cushion material through the gap between the outer piston walls and the inner walls of the pot, there is provided a sealing body of material which is more rigid than the cushion material. The sealing body faces said gap and forms an integral structure with the gap.
Inventors
- 👤 W Koester
- 👤 R Huber
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 23:50
CPC Classifications
E; E01; E01D; E01D19/00; E01D19/04; E01D19/042; E01D19/047
Claims Analysis
Total Claims: 8
Claim 1
Independent Claim
201 words
In a tiltable bearing wherein a supporting piston rests with its bottom surface on a yielding cushion of pressure material in a housing, wherein a gap is formed between a circumferential piston surface and an inner circumferential surface of the housing walls, wherein sealing means are located between the pressure material and said gap, said yielding cushion and said sealing means forming an integral structure, said sealing means having a mechanical strength larger than that of said pressure material of the yielding cushion, the improvement wherein said yielding cushion has a top and bottom surface and a circumferential ring surface interconnecting said top and bottom surfaces, said sealing means forming a continuous ring zone which covers the entire circumferential ring surface of the yielding cushion, said continuous ring zone having said larger mechanical strength, said continuous ring zone providing a good sliding property relative to the inner wall of the housing, and means for initially bonding said mechanically stronger ring zone to the entire circumferential ring surface of said cushion whereby said ring zone substantially insulates the yielding movements of said cushion from said inner housing walls while simultaneously providing reduced friction between the ring zone and said inner housing walls.
Claim 2
Dependent Claim
201 words
In a tiltable bearing wherein a supporting piston rests with its bottom surface on a yielding cushion of pressure material in a housing, wherein a gap is formed between a circumferential piston surface and an inner circumferential surface of the housing walls, wherein sealing means are located between the pressure material and said gap, said yielding cushion and said sealing means forming an integral structure, said sealing means having a mechanical strength larger than that of said pressure material of the yielding cushion, the improvement wherein said yielding cushion has a top and bottom surface and a circumferential ring surface interconnecting said top and bottom surfaces, said sealing means forming a continuous ring zone which covers the entire circumferential ring surface of the yielding cushion, said continuous ring zone having said larger mechanical strength, said continuous ring zone providing a good sliding property relative to the inner wall of the housing, and means for initially bonding said mechanically stronger ring zone to the entire circumferential ring surface of said cushion whereby said ring zone substantially insulates the yielding movements of said cushion from said inner housing walls while simultaneously providing reduced friction between the ring zone and said inner housing walls.
Claim 3
Dependent Claim
26 words
The tiltable bearing according to claim 1, wherein said ring zone has a concave inner surface intimately bonded to the ring surface of the yielding cushion.
Claim 4
Dependent Claim
30 words
The tiltable bearing according to claim 1, wherein said ring zone has a corrugated inner surface which grips into a respective corrugation of the circumferential ring surface of the cushion.
Claim 5
Dependent Claim
21 words
The tiltable bearing according to claim 1, wherein the sealing ring zone is of the same material as the yielding cushion.
Claim 6
Dependent Claim
30 words
The tiltable bearing according to claim 1, wherein the means for intimately bonding comprise glue or a vulcanized or a welded interface between the cushion and the sealing ring zone.
Claim 7
Dependent Claim
27 words
The tiltable bearing according to claim 1, wherein the sealing means and the yielding cushion are made of different materials capable of intimately bonding to each other.
Claim 8
Dependent Claim
26 words
The tiltable bearing according to claim 1, wherein the sealing means and the yielding cushion are made of materials of the natural or synthetic rubber type.
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) | 1976-12-31 | 1977-07-02 | 1978-01-01 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-12-31 | 1981-07-02 | 1982-01-01 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-12-31 | 1985-07-02 | 1986-01-01 | $7700.00 | Window Closed / Lapsed |