Patent US4279533A successfully refreshed from Google Patents.
US4279533A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Roadway expansion joint
Assignee: Sandoz AG
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Filing: 1980-02-20
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Granted: 1981-07-21
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Expires: 2000-02-20
Abstract
Abstract A roadway sealed expansion joint between roadway sections spaced by an expansion slot, the roadway sections having recesses adjacent and extending longitudinally of the slot. A metal plate bridges the slot and is secured to the bottom of the recess in one of the sections and is movable relative to the bottom of the recess in the other of the sections. Overlying the metal plate is a unitary elastomeric slab with its upper surface aligned with the upper surfaces of the concrete sections and with its edges bonded to the sides of the recesses, this elastomeric slab having a center premolded portion of relatively high elasticity and edge portions which are molded in situ and which are of relatively low elasticity.
Inventors
- 👤 Charles M. Peterson
- 👤 Frank M. Lymburner
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 13:28
CPC Classifications
E; E01; E01D; E01D19/00; E01D19/06; E01D19/067
Claims Analysis
Total Claims: 17
Claim 1
Independent Claim
172 words
In a roadway having concrete sections with upper surfaces aligned to form the roadway surface and spaced from each other to provide an expansion slot, each concrete section having at the end thereof adjacent said slot a recess which extends longitudinally of the slot and which has a bottom surface generally parallel to the roadway surface and a side surface extending from said bottom surface to the roadway surface; a metal plate bridging said slot, said metal plate being secured to the bottom surface of one of said recesses and being movable relative to the bottom surface of the other of said recesses; and a unitary elastomeric slab above said metal plate and bridging said slot, said elastomeric slab having an upper surface aligned with the upper surface of said concrete sections and having edge surfaces bonded to the side surfaces of said recesses, said elastomeric slab having a premolded center portion of relatively high elasticity and having edge portions which are molded in situ and which are of relatively low elasticity.
Claim 2
Dependent Claim
172 words
In a roadway having concrete sections with upper surfaces aligned to form the roadway surface and spaced from each other to provide an expansion slot, each concrete section having at the end thereof adjacent said slot a recess which extends longitudinally of the slot and which has a bottom surface generally parallel to the roadway surface and a side surface extending from said bottom surface to the roadway surface; a metal plate bridging said slot, said metal plate being secured to the bottom surface of one of said recesses and being movable relative to the bottom surface of the other of said recesses; and a unitary elastomeric slab above said metal plate and bridging said slot, said elastomeric slab having an upper surface aligned with the upper surface of said concrete sections and having edge surfaces bonded to the side surfaces of said recesses, said elastomeric slab having a premolded center portion of relatively high elasticity and having edge portions which are molded in situ and which are of relatively low elasticity.
Claim 3
Dependent Claim
54 words
A roadway as set forth in claim 1 wherein the premolded center portion of said elastomeric slab has a durometer elasticity on the Shore A scale of from 25 to 40 and wherein the edge portions of said elastomeric slab have a durometer elasticity on the Shore A scale of from 70 to 95.
Claim 4
Dependent Claim
65 words
A roadway as set forth in claim 1 wherein the width of each of said edge portions at the upper surface thereof and in a direction transverse to the slot is from about 1/2 to 3/4 inch and wherein the width of said center portion at the upper surface thereof and in a direction transverse to the slot is from about 4 to 12 inches.
Claim 5
Dependent Claim
69 words
A roadway as set forth in claim 1 wherein the bottom surfaces of said recesses are covered with a layer of bedding material, wherein there is a layer of low friction plastic between said metal plate and said elastomeric slab and wherein there is a layer of low friction plastic between the bedding material covering the said other of said recesses and the overlying portion of said metal plate.
Claim 6
Dependent Claim
36 words
A roadway as set forth in claim 1 wherein the junctions between the edge portions and the center portion of the elastomeric slab are tapered toward the center of the slab from bottom to top thereof.
Claim 7
Dependent Claim
18 words
A roadway as set forth in claim 1 wherein all portions of said elastomeric slab are polyurethane elastomer.
Claim 8
Dependent Claim
294 words
In a roadway having concrete sections with upper surfaces aligned to form the roadway surface and spaced from each other to provide an expansion slot, each concrete section having at the end thereof adjacent said slot a recess which extends longitudinally of the slot and which has a bottom surface generally parallel to the roadway surface and a side surface extending from said bottom surface to the roadway surface; a metal plate bridging said slot, said metal plate being secured to the bottom surface of one of said recesses and being movable relative to the bottom surface of the other of said recesses; a layer of elastomeric bedding material covering and bonded to the bottom surface of each of said recesses intermediate said plate and said bottom surfaces; a layer of low friction plastic between the bedding material on the bottom surface of the other of said recesses and said metal plate; a unitary elastomeric slab above said metal plate and bridging said slot, said elastomeric slab having an upper surface aligned with the upper surfaces of said concrete sections and having edge surfaces bonded to the side surfaces of said recesses, said elastomeric slab having a premolded center portion and having edge portions which are molded in situ; and a layer of low friction plastic between said metal plate and said elastomeric slab; said center portion of said slab having a durometer elasticity on the Shore A scale of from 25 to 40, a tensile strength of from 200 to 400 psi and elongation of from 400 to 800%; and said edge portions having a durometer elasticity on the Shore A scale of from 70 to 95, a tensile strength of from 800 to 3000 psi and elongation of from 50 to 300%.
Claim 9
Dependent Claim
294 words
In a roadway having concrete sections with upper surfaces aligned to form the roadway surface and spaced from each other to provide an expansion slot, each concrete section having at the end thereof adjacent said slot a recess which extends longitudinally of the slot and which has a bottom surface generally parallel to the roadway surface and a side surface extending from said bottom surface to the roadway surface; a metal plate bridging said slot, said metal plate being secured to the bottom surface of one of said recesses and being movable relative to the bottom surface of the other of said recesses; a layer of elastomeric bedding material covering and bonded to the bottom surface of each of said recesses intermediate said plate and said bottom surfaces; a layer of low friction plastic between the bedding material on the bottom surface of the other of said recesses and said metal plate; a unitary elastomeric slab above said metal plate and bridging said slot, said elastomeric slab having an upper surface aligned with the upper surfaces of said concrete sections and having edge surfaces bonded to the side surfaces of said recesses, said elastomeric slab having a premolded center portion and having edge portions which are molded in situ; and a layer of low friction plastic between said metal plate and said elastomeric slab; said center portion of said slab having a durometer elasticity on the Shore A scale of from 25 to 40, a tensile strength of from 200 to 400 psi and elongation of from 400 to 800%; and said edge portions having a durometer elasticity on the Shore A scale of from 70 to 95, a tensile strength of from 800 to 3000 psi and elongation of from 50 to 300%.
Claim 10
Independent Claim
206 words
A method for forming a sealed expansion joint in a roadway having concrete sections with upper surfaces aligned to form a roadway surface and with an expansion slot therebetween, each of the concrete sections having a recess which extends longitudinally of the slot and which has a bottom surface generally parallel to the roadway surface and a side surface extending from the roadway surface to the bottom surface, said method comprising: securing a metal plate to the bottom surface of one of said recesses with the metal plate bridging the expansion slot and being movable relative to the bottom surface of the other of the recesses; placing a premolded elastomeric body of relatively high elasticity over the metal plate with the edges of said body being spaced from the side surfaces of said recesses; and molding in situ between the edges of said body and the sides of said recesses edge bodies of elastomeric material of relatively low elasticity thereby to chemically bond said edge bodies to said premolded body to form therewith a unitary elastomeric slab having a center portion of relatively high elasticity and edge portions of relatively low elasticity and with said edge portions being chemically bonded to the sides of said recesses.
Claim 11
Independent Claim
206 words
A method for forming a sealed expansion joint in a roadway having concrete sections with upper surfaces aligned to form a roadway surface and with an expansion slot therebetween, each of the concrete sections having a recess which extends longitudinally of the slot and which has a bottom surface generally parallel to the roadway surface and a side surface extending from the roadway surface to the bottom surface, said method comprising: securing a metal plate to the bottom surface of one of said recesses with the metal plate bridging the expansion slot and being movable relative to the bottom surface of the other of the recesses; placing a premolded elastomeric body of relatively high elasticity over the metal plate with the edges of said body being spaced from the side surfaces of said recesses; and molding in situ between the edges of said body and the sides of said recesses edge bodies of elastomeric material of relatively low elasticity thereby to chemically bond said edge bodies to said premolded body to form therewith a unitary elastomeric slab having a center portion of relatively high elasticity and edge portions of relatively low elasticity and with said edge portions being chemically bonded to the sides of said recesses.
Claim 12
Dependent Claim
46 words
A method as set forth in claim 8 wherein said premolded elastomeric body has a durometer elasticity on the Shore A scale of from 25 to 40 and wherein said edge bodies have a durometer elasticity on the Shore A scale of from 70 to 95.
Claim 13
Dependent Claim
30 words
A method as set forth in claim 8 wherein said premolded elastomeric body has edge surfaces which are tapered toward the center of the body from bottom to top thereof.
Claim 14
Dependent Claim
21 words
A method as set forth in claim 8 wherein the premolded elastomeric body and the edge bodies are of polyurethane elastomer.
Claim 15
Dependent Claim
51 words
A method as set forth in claim 8 wherein the bottom surfaces of said recesses are coated with an elastomeric bedding material prior to securing said metal plate, said metal plate being secured by bonding it to the coating of bedding material on the surface of said one of said recesses.
Claim 16
Independent Claim
290 words
A method for forming a sealed expansion joint in a roadway having concrete sections with upper surfaces aligned to form a roadway surface and with an expansion slot therebetween, each of the concrete sections having a recess which extends longitudinally of the slot and which has a bottom surface generally parallel to the roadway surface and a side surface extending from the surface to the bottom surface, said method comprising: coating the bottom surfaces of recesses with an elastomeric bedding material; placing a sheet of low friction plastic over the coating of bedding material on the bottom surface of one of said recesses; bonding a metal plate to the bedding material on the bottom surface of the other of said recesses with the metal plate bridging the expansion slot and being movable relative to said sheet of low friction plastic; placing a sheet of low friction plastic over said plate; placing a premolded elastomeric body over said second-mentioned plastic sheet with the side surfaces of said body being spaced from the side surfaces of said recesses; coating the side surfaces of said elastomeric body and the side surfaces of said recesses with a thin layer of elastomeric primer; and molding and thereafter curing in situ between the coated side surfaces of said body and the coated side surfaces of said recesses, edge bodies of elastomeric material thereby to chemically bond said edge bodies to the sides of said recesses and to said premolded body to form with said premolded body a unitary elastomeric slab; said premolded body having a durometer elasticity on the Shore A scale of from 25 to 40 and said cured edge bodies having a durometer elasticity on the Shore A scale of from 70 to 95.
Claim 17
Independent Claim
290 words
A method for forming a sealed expansion joint in a roadway having concrete sections with upper surfaces aligned to form a roadway surface and with an expansion slot therebetween, each of the concrete sections having a recess which extends longitudinally of the slot and which has a bottom surface generally parallel to the roadway surface and a side surface extending from the surface to the bottom surface, said method comprising: coating the bottom surfaces of recesses with an elastomeric bedding material; placing a sheet of low friction plastic over the coating of bedding material on the bottom surface of one of said recesses; bonding a metal plate to the bedding material on the bottom surface of the other of said recesses with the metal plate bridging the expansion slot and being movable relative to said sheet of low friction plastic; placing a sheet of low friction plastic over said plate; placing a premolded elastomeric body over said second-mentioned plastic sheet with the side surfaces of said body being spaced from the side surfaces of said recesses; coating the side surfaces of said elastomeric body and the side surfaces of said recesses with a thin layer of elastomeric primer; and molding and thereafter curing in situ between the coated side surfaces of said body and the coated side surfaces of said recesses, edge bodies of elastomeric material thereby to chemically bond said edge bodies to the sides of said recesses and to said premolded body to form with said premolded body a unitary elastomeric slab; said premolded body having a durometer elasticity on the Shore A scale of from 25 to 40 and said cured edge bodies having a durometer elasticity on the Shore A scale of from 70 to 95.
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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) | 1984-07-20 | 1985-01-19 | 1985-07-21 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1988-07-20 | 1989-01-19 | 1989-07-21 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1992-07-20 | 1993-01-19 | 1993-07-21 | $7700.00 | Window Closed / Lapsed |