Patent US4601604A successfully refreshed from Google Patents.
US4601604A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Expansion joint
Assignee: ALH Systems Ltd
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Filing: 1983-07-25
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Granted: 1986-07-22
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Expires: 2003-07-25
Abstract
Abstract An expansion joint for sealing the channel between two sections of roadway has a plug and a fluid-polymer poured into the joint and allowed to set in situ in the channel. Enclosed within the fluid is a core of a mastic material which is more plastic and less elastic than the fluid-polymer. The elasticity of the fluid-polymer allows the joint to accommodate changes in the size of the joint due to e.g. thermal expansion and contraction. Plastic flow of the core permits changes of shape of the joint to be absorbed without causing excessive stressing of the sides of the channel to which the fluid-polymer adheres.
Inventors
- 👤 John R. G. Clark
- 👤 Philip J. Wade
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 12:48
CPC Classifications
E; E01; E01D; E01D19/00; E01D19/06; E01C; E01C11/00; E01C11/02; E01C11/04; E01C11/10
Claims Analysis
Total Claims: 14
Claim 1
Independent Claim
88 words
An expansion joint for joining two sections of a roadway, such sections having opposing sides, defining a channel between said sections, said expansion joint comprising: a plug for sealing said channel; a set fluid-polymer which sets in situ in said channel, said set fluid-polymer being located in said channel above said plug, such set fluid-polymer adhering to said sides of said sections for holding said joint in said channel; and a core in said set fluid-polymer said core being more plastic and less elastic than said set fluid-polymer.
Claim 2
Dependent Claim
88 words
An expansion joint for joining two sections of a roadway, such sections having opposing sides, defining a channel between said sections, said expansion joint comprising: a plug for sealing said channel; a set fluid-polymer which sets in situ in said channel, said set fluid-polymer being located in said channel above said plug, such set fluid-polymer adhering to said sides of said sections for holding said joint in said channel; and a core in said set fluid-polymer said core being more plastic and less elastic than said set fluid-polymer.
Claim 3
Dependent Claim
17 words
A expansion joint according to claim 1, wherein said core is wholly surrounded by said set fluid-polymer.
Claim 4
Dependent Claim
11 words
An expansion joint according to claim 1, wherein said core mastic.
Claim 5
Dependent Claim
15 words
An expansion joint according to claim 1, wherein said core is comprises an extruded strip.
Claim 6
Dependent Claim
143 words
An expansion joint for joining two sections of a roadway, said sections having opposing sides defining a channel between said sections, said channel having a first part and a second part, narrower than said first part, said second part extending downward from said second part, the expansion joint comprising: a plug for sealing said second part of said channel; a set fluid-polymer which sets in situ in said channel, said set fluid-polymer extending upward from said plug and filling said first part of said channel, said set fluid-polymer adhering to said sides of said channel for holding said expansion joint in said channel; and a core in said set fluid-polymer and in said first part of said channel, said core having a width greater than said second part of said channel, said core being more plastic and less elastic than said set fluid-polymer.
Claim 7
Dependent Claim
143 words
An expansion joint for joining two sections of a roadway, said sections having opposing sides defining a channel between said sections, said channel having a first part and a second part, narrower than said first part, said second part extending downward from said second part, the expansion joint comprising: a plug for sealing said second part of said channel; a set fluid-polymer which sets in situ in said channel, said set fluid-polymer extending upward from said plug and filling said first part of said channel, said set fluid-polymer adhering to said sides of said channel for holding said expansion joint in said channel; and a core in said set fluid-polymer and in said first part of said channel, said core having a width greater than said second part of said channel, said core being more plastic and less elastic than said set fluid-polymer.
Claim 8
Dependent Claim
56 words
An expansion joint according to claim 5, wherein said first part of said channel has a frusto-conical cross section with the wider end of said frusto-conical cross section of said part of said channel and said core has a corresponding frusto-conical cross section with sides parallel to the sides of said first part of said channel.
Claim 9
Independent Claim
155 words
A method of forming an expansion joint for joining two sections of a roadway, said sections having opposing sides defining a channel between said sections, the method comprising: fitting a plug in said channel, said plug sealing said channel; pouring a first layer of fluid-polymer into said channel above said plug, said first layer of fluid-polymer when set adhering to said sides of said sections; locating a core on said first layer of fluid-polymer; pouring a second layer of the fluid-polymer into said channel above said first layer of fluid-polymer to a depth sufficient to cover said core; and allowing said second layer of fluid-polymer to set said second layer of fluid-polymer when set adhering to said sides of said sections; wherein said core is more plastic and less elastic than the fluid-polymer of said first layer and said second layer of fluid-polymer when said first layer and said second layer of fluid-polymer are set.
Claim 10
Independent Claim
155 words
A method of forming an expansion joint for joining two sections of a roadway, said sections having opposing sides defining a channel between said sections, the method comprising: fitting a plug in said channel, said plug sealing said channel; pouring a first layer of fluid-polymer into said channel above said plug, said first layer of fluid-polymer when set adhering to said sides of said sections; locating a core on said first layer of fluid-polymer; pouring a second layer of the fluid-polymer into said channel above said first layer of fluid-polymer to a depth sufficient to cover said core; and allowing said second layer of fluid-polymer to set said second layer of fluid-polymer when set adhering to said sides of said sections; wherein said core is more plastic and less elastic than the fluid-polymer of said first layer and said second layer of fluid-polymer when said first layer and said second layer of fluid-polymer are set.
Claim 11
Dependent Claim
22 words
A method according to claim 7, wherein said core is wholly enclosed between said first layer and said second layer of fluid-polymer.
Claim 12
Dependent Claim
96 words
A method according to claim 8, wherein: said channel has a first part and a second part, said second part extending downwardly of said first part, said second part having a width smaller than the width of said first part; said plug is fitted in said second part of said channel; said first layer of fluid-polymer extends from said plug into said first part of said channel; and said core is located wholly within said first part of said channel, said core having a width greater than the width of said second part of said channel.
Claim 13
Independent Claim
94 words
A method of forming an expansion joint for joining two sections of a roadway, said sections having opposing sides defining a channel between said sections, the method comprising: fitting a plug in said channel, said plug sealing said channel; locating a core in said channel above said plug; pouring a fluid-polymer into said channel to a depth sufficient to cover said core; and allowing said fluid-polymer to set, said fluid-polymer when set adhering to said sides of said sections; wherein said core is more plastic and less elastic than the fluid polymer when set.
Claim 14
Independent Claim
94 words
A method of forming an expansion joint for joining two sections of a roadway, said sections having opposing sides defining a channel between said sections, the method comprising: fitting a plug in said channel, said plug sealing said channel; locating a core in said channel above said plug; pouring a fluid-polymer into said channel to a depth sufficient to cover said core; and allowing said fluid-polymer to set, said fluid-polymer when set adhering to said sides of said sections; wherein said core is more plastic and less elastic than the fluid polymer when set.
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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) | 1989-07-21 | 1990-01-20 | 1990-07-22 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1993-07-21 | 1994-01-20 | 1994-07-22 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1997-07-21 | 1998-01-20 | 1998-07-22 | $7700.00 | Window Closed / Lapsed |