US4030740A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Expansion joint
Assignee: American Air Filter Co Inc
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Filing: 1975-07-01
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Granted: 1977-06-21
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Expires: 1995-07-01
Abstract
Abstract An expansion joint for two ducts having incorporated therein means for enabling movement of one of the ducts relative to the other and further including means for preventing substantial lateral movement of the ducts including first and second opposed cylindrical conduits, the first of the opposed conduits being slidably mounted onto an inner sleeve with an outer sleeve extending substantially around and in sliding relation with the first conduit.
Inventors
- 👤 Edward L. Kniss, Jr.
- 👤 Dennis L. Hixenbaugh
- 👤 Jerry A. Maudlin
- 👤 Nicholas J. Brozenick
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 03:16
CPC Classifications
F; F16; F16L; F16L27/00; F16L27/12
Claims Analysis
Total Claims: 9
Claim 1
Independent Claim
148 words
An expansion joint for two ducts comprising: first and second opposed conduits mounted onto an inner sleeve, said first conduit being slidably mounted onto said inner sleeve and said second conduit including means affixing said second conduit to said inner sleeve; and, said opposed conduits having outwardly extending receiving means on facing ends with an outer sleeve extending around said ends thereof, the outwardly extending means of the first conduit includes a flexible packing material therein sealingly engaging said first conduit and said outer sleeve, said first conduit being in sliding relation with said outer sleeve, said second conduit including means affixed against movement relative to said outer sleeve, said outer sleeve being in two sections, a first section and a second section, said first and second sections having opposed facing flanges thereon, said facing flanges including connecting means whereby said packing material may be removed and replaced.
Claim 2
Dependent Claim
148 words
An expansion joint for two ducts comprising: first and second opposed conduits mounted onto an inner sleeve, said first conduit being slidably mounted onto said inner sleeve and said second conduit including means affixing said second conduit to said inner sleeve; and, said opposed conduits having outwardly extending receiving means on facing ends with an outer sleeve extending around said ends thereof, the outwardly extending means of the first conduit includes a flexible packing material therein sealingly engaging said first conduit and said outer sleeve, said first conduit being in sliding relation with said outer sleeve, said second conduit including means affixed against movement relative to said outer sleeve, said outer sleeve being in two sections, a first section and a second section, said first and second sections having opposed facing flanges thereon, said facing flanges including connecting means whereby said packing material may be removed and replaced.
Claim 3
Dependent Claim
31 words
The expansion joint of claim 1 wherein said first conduit receiving means including said flexible packing therein includes two spaced ring members, said flexible packing being disposed between said ring members.
Claim 4
Dependent Claim
34 words
The expansion joint of claim 2 wherein the outer diameter of said ring members are less than the inner diameter of said outer sleeve, said flexible packing material extending outwardly beyond said ring members.
Claim 5
Dependent Claim
18 words
The expansion joint of claim 1 including flange means on opposed outwardly extending ends of said opposed conduits.
Claim 6
Dependent Claim
51 words
The expansion joint of claim 1, said outer sleeve being provided with an inwardly extending ring member thereon at one end thereof, said ring member being spaced from said outwardly extending receiving means of said first conduit in one position and in juxtaposed relation therewith upon expansion to a second position.
Claim 7
Dependent Claim
23 words
The expansion joint of claim 5 wherein said ring member has an inner diameter greater than the outer diameter of said first conduit.
Claim 8
Dependent Claim
17 words
The expansion joint of claim 1 wherein said opposed conduits are of approximately the same inner diameter.
Claim 9
Dependent Claim
36 words
The expansion joint of claim 1 wherein the receiving means of said first conduit is of U-shaped cross section encircling said conduit, the base of said U-shaped cross section being in communication with said outer sleeve.
References Cited (Backward Citations)
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US1001842A
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US2438312A
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US2565296A
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US2845283A
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US2911238A
Cited
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Cited
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Cited
US3876252A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1980-06-20 | 1980-12-20 | 1981-06-21 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1984-06-20 | 1984-12-20 | 1985-06-21 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1988-06-20 | 1988-12-20 | 1989-06-21 | $7700.00 | Window Closed / Lapsed |