US3788758A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Hold-down assembly for modular expansion joints
Assignee: Fox Industries Inc
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Filing: 1972-04-07
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Granted: 1974-01-29
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Expires: 1992-04-07
Abstract
Abstract A new and improved hold-down assembly is provided for attachment to modular expansion joints. These expansion joints are used to connect sections of bridge roadways. The hold-down assemblies secure the joint in such a manner as to allow for movement due to expansion, contraction, and rotation and additionally eliminate the noise produced by the joint which is generated by the traffic flow. The hold-down assembly consists of a thin strip of stainless steel which is bonded to the underside of a supporting bar for the joint. The supporting bar makes contact with a plurality of fabric reinforced elastomeric pads topped wtih thin sheets of teflon. The hold-down assemblies are attached to the joints members by means of welded flanges and appropriate hardware.
Inventors
- 👤 C Scheffel
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-06 03:45
CPC Classifications
E; E01; E01D; E01D19/00; E01D19/06; E01D19/062
Claims Analysis
Total Claims: 9
Claim 1
Independent Claim
156 words
In combination with an expansion-contraction type modular joint used to connect sections of bridge roadways consisting of a plurality of parallel spaced channels which run substantially the width of a roadway, compression seals positioned between certain of said parallel spaced channels to form expansion and compression joints, and supporting members positioned transversely of said parallel spaced channels for supporting said parallel spaced channels; and a plurality of spaced hold-down assemblies, each said hold-down assembly being fully contained within said modular joint and having a portion coupled to its respective channel and a spaced portion being coupled to said supporting member for holding together its respective channel and said supporting member from within said modular joint and mounted for movement to and between its respective channel and supporting member to permit relative movement between said channels and supporting members and thereby eliminate noise but allow for movement as necessary for expansion and contraction of said modular joint.
Claim 2
Dependent Claim
156 words
In combination with an expansion-contraction type modular joint used to connect sections of bridge roadways consisting of a plurality of parallel spaced channels which run substantially the width of a roadway, compression seals positioned between certain of said parallel spaced channels to form expansion and compression joints, and supporting members positioned transversely of said parallel spaced channels for supporting said parallel spaced channels; and a plurality of spaced hold-down assemblies, each said hold-down assembly being fully contained within said modular joint and having a portion coupled to its respective channel and a spaced portion being coupled to said supporting member for holding together its respective channel and said supporting member from within said modular joint and mounted for movement to and between its respective channel and supporting member to permit relative movement between said channels and supporting members and thereby eliminate noise but allow for movement as necessary for expansion and contraction of said modular joint.
Claim 3
Dependent Claim
54 words
In the combination as recited in claim 1, each said hold-down assembly consisting of a stainless steel rub sheet, a fabric reinforced elastomeric pad having a polytetrafluoroethylene top adjacent said steel rub sheet, said pad being attached to its respective channel, and means for coupling said teflon topped pad to its respective supporting member.
Claim 4
Dependent Claim
37 words
In the combination as recited in claim 2, wherein said stainless steel rub sheet is positioned below and adjacent to its respective supporting member and having the polytetrafluoroethylene topped elastomeric pads positioned under the respective supporting members.
Claim 5
Dependent Claim
39 words
In the combination as recited in claim 1, and a slotted flange secured to each side of a supporting member, a studded element secured to a selected channel, and means for moveably securing said slotted flange and studded element.
Claim 6
Dependent Claim
63 words
In the combination as recited in claIm 1, wherein each said hold-down assembly comprises, a support bar which is secured to its respective channel, a flange extending from and fixedly secured to said support member adjacent to and spaced from said support bar, and means coupled to and between said support bar and flange for holding said support member and channels in engagement.
Claim 7
Dependent Claim
24 words
In the combination as recited in claim 1, wherein the hold-down assemblies are contained within an enclosure which precludes entry of foreign matter therein.
Claim 8
Dependent Claim
28 words
In the combination as recited in claim 1, wherein said hold-down assemblies are located at points precisely where said channel is urged into engagement with said support members.
Claim 9
Dependent Claim
42 words
In the combination as recited in claim 1, wherein at least one of said channels is a center channel positioned on said supporting members and having at least one hold-down assembly which holds for relative movement said channel with said support members.
References Cited (Backward Citations)
US3482492A
Cited
US3484882A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1977-01-28 | 1977-07-30 | 1978-01-29 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1981-01-28 | 1981-07-30 | 1982-01-29 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1985-01-28 | 1985-07-30 | 1986-01-29 | $7700.00 | Window Closed / Lapsed |