US3921240A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Structural bearings
Assignee: Elastometal Ltd
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Filing: 1973-10-29
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Granted: 1975-11-25
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Expires: 1993-10-29
Abstract
Abstract A structural bearing such as is employed in bridges and large buildings comprises a relatively thin layer of an elastomer, such as polyurethane, interposed between and bonded to two flat bearing members; at least one shear-resisting member, such as a pin passing through the elastomer layer, or a plate having its edge engaged with a ring surrounding the layer, extends between the two members and is in shear-resisting pivotal engagement with one of them in a manner to accommodate vertical compression of the elastomer and tilting of the two members. Other relative movements of the structure engaging the bearings are accommodated by relatively sliding parts thereof.
Inventors
- 👤 Edward R Fyfe
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 04:07
CPC Classifications
E; E04; E04B; E04B1/00; E04B1/36; E01; E01D; E01D19/00; E01D19/04; E01D19/042; E01D19/047
Claims Analysis
Total Claims: 17
Claim 1
Independent Claim
185 words
A bearing for a bridge or similar structure to permit sliding and rotational movement between said structure and a support therefor, said bearing comprising a first plate member, a second plate member generally parallel to said first plate member and mounted for sliding movement parallel to said first plate member, a third plate member, means for securing said first and third plates to said structure and said support, a load bearing elastomer pad interposed between said second and third plates to absorb the load of said structure and a cooperating bearing member constructed and arranged to substantially prevent shearing movement between said second and third plates but permit rotational movement between said second and third plates and movement between said second and third plates in a direction normal to their facing surfaces, whereby sliding movement between said structure and said support is accommodated by sliding of said first and second plates in relation to each other and rotational movement between said bridge and said support is accommodated by rotation between said second and third plates while said elastomer pad is protected from excessive shear loads.
Claim 2
Dependent Claim
185 words
A bearing for a bridge or similar structure to permit sliding and rotational movement between said structure and a support therefor, said bearing comprising a first plate member, a second plate member generally parallel to said first plate member and mounted for sliding movement parallel to said first plate member, a third plate member, means for securing said first and third plates to said structure and said support, a load bearing elastomer pad interposed between said second and third plates to absorb the load of said structure and a cooperating bearing member constructed and arranged to substantially prevent shearing movement between said second and third plates but permit rotational movement between said second and third plates and movement between said second and third plates in a direction normal to their facing surfaces, whereby sliding movement between said structure and said support is accommodated by sliding of said first and second plates in relation to each other and rotational movement between said bridge and said support is accommodated by rotation between said second and third plates while said elastomer pad is protected from excessive shear loads.
Claim 3
Dependent Claim
45 words
A bearing for a bridge or similar structure as set forth in claim 1 in which said cooperating bearing member is rigidly connected to one of said second and third plates and slidably and pivotally connected to the other of said second and third plates.
Claim 4
Dependent Claim
60 words
A bearing for a bridge or similar structure as set forth in claim 2 in which said cooperating bearing member is a pin rigidly connected to the center one of said second and third plates, the distal end of said pin being received and slidably and rotationally movable in a socket in the other of said second and third plates.
Claim 5
Dependent Claim
54 words
A bearing for a bridge or similar structure as set forth in claim 3 in which there is a collar having a socket in which the distal end of said pin is received, said pin being pivotally movable in said socket, and said collar being slidably movable in a socket in said other plate.
Claim 6
Dependent Claim
50 words
A bearing for a bridge or similar structure as set forth in claim 1 in which said cooperating bearing member is slidably connected to one of said second and third plates and pivotally connected to the other of said second and third plates to permit movement in said normal direction.
Claim 7
Dependent Claim
42 words
A bearing for a bridge or similar structure as set forth in claim 5 in which said cooperating bearing member is a pin slidably received in a socket in said one plate and pivotally received in a socket in said other plate.
Claim 8
Dependent Claim
43 words
A bearing for a bridge or similar structure as set forth in claim 6 in which the socket in said other plate is provided by a housing extending from said one plate toward said other plate, said housing extending into said elastomer pad.
Claim 9
Dependent Claim
48 words
A bearing for a bridge or similar structure as set forth in claim 1 in which said cooperating bearing member is a ring secured to one of said second and third plates and pivotal with respect to the edge of the other of said second and third plates.
Claim 10
Dependent Claim
73 words
In a bridge comprising a bridge member, a support for said bridge and a bearing between said support and said bridge permitting slidable and rotational movement of the bridge with respect to the support, the improvement wherein said bearing comprises the bearing set forth in claim 1, one of said first and third plates being secured to said bridge and the other of said first and third plates being secured to said support.
Claim 11
Dependent Claim
38 words
A bridge as set forth in claim 9 wherein said cooperating bearing member is rigidly connected to one of said second and third plates and slidably and pivotally connected to the other Of said second and third plates.
Claim 12
Dependent Claim
53 words
A bridge as set forth in claim 10 wherein said cooperating bearing member is a pin rigidly connected to the center one of said second and third plates, the distal end of said pin being received and slidably and rotationally movable in a socket in the other of said second and third plates.
Claim 13
Dependent Claim
48 words
A bridge as set forth in claim 11 in which there is a collar having a socket in which the distal end of said pin is received, said pin being pivotally movable in said socket, and said collar being slidably movable in a socket in said other plate.
Claim 14
Dependent Claim
44 words
A bridge as set forth in claim 9 in which said cooperating bearing member is slidably connected to one of said second and third plates and pivotally connected to the other of said second and third plates to permit movement in said normal direction.
Claim 15
Dependent Claim
36 words
A bridge as set forth in claim 13 in which said cooperating bearing member is a pin slidably received in a socket in said one plate and pivotally received in a socket in said other plate.
Claim 16
Dependent Claim
37 words
A bridge as set forth in claim 14 in which the socket in said other plate is provided by a housing extending from said one plate toward said other plate, said housing extending into said elastomer pad.
Claim 17
Dependent Claim
42 words
A bridge as set forth in claim 9 in which said cooperating bearing member is a ring secured to one of said second and third plates and pivotal with respect to the edge of the other of said second and third plates.
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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) | 1978-11-24 | 1979-05-26 | 1979-11-25 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1982-11-24 | 1983-05-26 | 1983-11-25 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1986-11-24 | 1987-05-26 | 1987-11-25 | $7700.00 | Window Closed / Lapsed |