Patent US5867951A successfully refreshed from Google Patents.
US5867951A
Expired / Lapsed
US
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Seismic isolation sliding bearing for structure
Assignee: Mitsubishi Steel Mfg Co Ltd
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Filing: 1997-05-29
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Granted: 1999-02-09
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Expires: 2017-05-29
Abstract
Abstract A seismic isolation sliding bearing for a structure, is made up of a dish 1 having a conical concave surface having a predetermined inclination or a spherical concave surface in its central portion, and a bearing element 2 in which the bearing element includes a base 3 whose portion for contact with the concave surface of the dish 1 is formed by a low-friction material, and a holder 6 which holds the base 3 so as to press it against the concave surface of the dish 1. The seismic isolation sliding bearing of the present invention neither resonates to the vibration period of any earthquake nor causes a large oscillation during a normal small vibration, but has a restoring force because of its structure which enables the bearing element to readily return to its original position after an earthquake ceases.
Inventors
- 👤 Daisuke Yaguchi
- 👤 Hiroshi Kurabayashi
- 👤 Toshio Omi
- 👤 Nobuyuki Sone
- 👤 Takeshi Someya
- 👤 Hirokazu Hora
- 👤 Akira Matsuda
- 👤 Takafumi Fujita
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 14:40
CPC Classifications
E; E04; E04H; E04H9/00; E04H9/02; E04H9/021
Claims Analysis
Total Claims: 17
Claim 1
Independent Claim
89 words
A seismic isolation sliding bearing for a structure, comprising a dish, bearing plate, having a spherical concave surface in its central portion and a trapezoidal concave surface inclined by a predetermined degree around said spherical concave surface, and a non-rotatable bearing element opposed to said bearing plate said bearing element including a base made of a low-friction and wear-resistant thermoplastic resin and having a spherical convex sliding surface, and a holder which holds said base so as to press said base against said concave surface of said bearing plate.
Claim 2
Dependent Claim
89 words
A seismic isolation sliding bearing for a structure, comprising a dish, bearing plate, having a spherical concave surface in its central portion and a trapezoidal concave surface inclined by a predetermined degree around said spherical concave surface, and a non-rotatable bearing element opposed to said bearing plate said bearing element including a base made of a low-friction and wear-resistant thermoplastic resin and having a spherical convex sliding surface, and a holder which holds said base so as to press said base against said concave surface of said bearing plate.
Claim 3
Dependent Claim
103 words
A seismic isolation sliding bearing for a structure according to claim 1, wherein a radius of curvature of said spherical concave surface in said central portion of said bearing plate and a radius of curvature of a spherical convex surface of said bearing element satisfies the following equation: γ=RsinΘ, where γ: distance from the center of said spherical concave surface or said spherical convex surface to the edge of said spherical concave surface or said spherical convex surface; R: radius of curvature of said spherical concave surface or the radius of curvature of said spherical convex surface; and Θ: angle of predetermined inclination.
Claim 4
Dependent Claim
45 words
A seismic isolation sliding bearing for a structure according to claim 1, wherein said concave surface of said bearing plate is made of smooth stainless steel and a reverse side of said concave surface has a reinforcement material made of concrete or a high-strength resin.
Claim 5
Dependent Claim
40 words
A seismic isolation sliding bearing for a structure according to claim 1, wherein said sliding bearing has an elastic member at a bottom Portion of said bearing plate, or at a bottom Portion of said base of said bearing element.
Claim 6
Dependent Claim
41 words
A seismic isolation sliding bearing for a structure according to claim 1, wherein said sliding bearing has a laminated rubber member at a bottom portion of said bearing plate, or at a bottom portion of said base of said bearing element.
Claim 7
Dependent Claim
107 words
A seismic isolation sliding bearing for a structure, comprising a bearing plate having a conical concave surface having a predetermined inclination and a non-rotatable bearing element opposed to said bearing plate, said bearing element having a top portion with a truncated cone shape having a generatrix whose angle is the same as the inclination of the bearing plate and enables a trigger valve to be set during a normal state and including a base having a low friction material fixed to an end thereof and a holder which holds said base so as to press said low friction material against said concave surface of said bearing plate.
Claim 8
Dependent Claim
107 words
A seismic isolation sliding bearing for a structure, comprising a bearing plate having a conical concave surface having a predetermined inclination and a non-rotatable bearing element opposed to said bearing plate, said bearing element having a top portion with a truncated cone shape having a generatrix whose angle is the same as the inclination of the bearing plate and enables a trigger valve to be set during a normal state and including a base having a low friction material fixed to an end thereof and a holder which holds said base so as to press said low friction material against said concave surface of said bearing plate.
Claim 9
Dependent Claim
40 words
A seismic isolation sliding bearing for a structure according to claim 6, wherein said sliding bearing has an elastic member at a bottom portion of said bearing plate, or at a bottom portion of said base of said bearing element.
Claim 10
Dependent Claim
41 words
A seismic isolation sliding bearing for a structure according to claim 6, wherein said sliding bearing has a laminated rubber member at a bottom portion of said bearing plate, or at a bottom portion of said base of said bearing element.
Claim 11
Dependent Claim
45 words
A seismic isolation sliding bearing for a structure according to claim 6, wherein said concave surface of said bearing plate is made of smooth stainless steel and a reverse side of said concave surface has a reinforcement material made of concrete or a high-strength resin.
Claim 12
Dependent Claim
92 words
A seismic isolation sliding bearing for a structure, comprising a bearing plate having a conical concave surface having a predetermined inclination, a non-rotatable bearing element opposed to said bearing plate, said bearing element including a base having a low-friction material fixed to an end thereof and a holder which holds said base so as to press said low-friction material against said concave surface of said bearing plate, and an elastic member provided at a bottom portion of said bearing plate or at a bottom portion of said base of said bearing element.
Claim 13
Dependent Claim
92 words
A seismic isolation sliding bearing for a structure, comprising a bearing plate having a conical concave surface having a predetermined inclination, a non-rotatable bearing element opposed to said bearing plate, said bearing element including a base having a low-friction material fixed to an end thereof and a holder which holds said base so as to press said low-friction material against said concave surface of said bearing plate, and an elastic member provided at a bottom portion of said bearing plate or at a bottom portion of said base of said bearing element.
Claim 14
Dependent Claim
93 words
A seismic isolation sliding bearing for a structure, comprising a bearing plate having a conical concave surface having a predetermined inclination, a non-rotatable bearing element opposed to said bearing plate, said bearing element including a base having a low-friction material fixed to an end thereof and a holder which holds said base so as to press said low-friction material against said concave surface of said bearing plate, and a laminated rubber member provided at a bottom portion of said bearing plate or at a bottom portion of said base of said bearing element.
Claim 15
Dependent Claim
93 words
A seismic isolation sliding bearing for a structure, comprising a bearing plate having a conical concave surface having a predetermined inclination, a non-rotatable bearing element opposed to said bearing plate, said bearing element including a base having a low-friction material fixed to an end thereof and a holder which holds said base so as to press said low-friction material against said concave surface of said bearing plate, and a laminated rubber member provided at a bottom portion of said bearing plate or at a bottom portion of said base of said bearing element.
Claim 16
Dependent Claim
96 words
A seismic isolation sliding bearing for a structure, comprising a bearing plate having a conical concave surface having a predetermined inclination, said concave surface being made of smooth stainless steel and a reverse side of said concave surface has a reinforcement material made of concrete or a high-strength resin, and a non-rotatable bearing element opposed to said bearing plate, said bearing element including a base having a low-friction material fixed to an end thereof and a holder which holds said base so as to press said low-friction material against said concave surface of said bearing plate.
Claim 17
Dependent Claim
96 words
A seismic isolation sliding bearing for a structure, comprising a bearing plate having a conical concave surface having a predetermined inclination, said concave surface being made of smooth stainless steel and a reverse side of said concave surface has a reinforcement material made of concrete or a high-strength resin, and a non-rotatable bearing element opposed to said bearing plate, said bearing element including a base having a low-friction material fixed to an end thereof and a holder which holds said base so as to press said low-friction material against said concave surface of said bearing plate.
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) | 2002-02-08 | 2002-08-10 | 2003-02-09 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 2006-02-08 | 2006-08-10 | 2007-02-09 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2010-02-08 | 2010-08-10 | 2011-02-09 | $7700.00 | Window Closed / Lapsed |