Patent US4540184A successfully refreshed from Google Patents.
US4540184A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Sand-filled sealing structure between at least one tube and a tube support plate
Assignee: AGC Inc
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Filing: 1985-01-24
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Granted: 1985-09-10
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Expires: 2005-01-24
Abstract
Abstract A sealing structure between at least one tube and a tube support plate having a hole for each tube to extend therethrough, characterized in that a ring member enclosing each tube with a space therefrom is secured to the tube support plate, a sand is filled in the space to form a cylindrical sand layer surrounding the tube, a means for preventing leakage of the sand is provided at each axial end of the sand layer.
Inventors
- 👤 Kunio Takahashi
- 👤 Noriyuki Oda
- 👤 Nobuyuki Kido
- 👤 Keizi Muramatsu
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-09 12:40
CPC Classifications
F; F28; F28F; F28F9/00; F28F9/02; F28F9/04; F28F9/06; F16; F16L; F16L41/00; F16L41/08; F28F21/00; F28F21/04
Claims Analysis
Total Claims: 14
Claim 1
Independent Claim
77 words
A sealing structure between at least one tube and a tube support plate having a hole for each tube to extend therethrough, characterized in that a ring member enclosing each tube with a space therefrom is secured to the tube support plate, a sand is filled in the space to form a cylindrical sand layer surrounding the tube, and a means for preventing leakage of the sand is provided at each axial end of the sand layer.
Claim 2
Dependent Claim
77 words
A sealing structure between at least one tube and a tube support plate having a hole for each tube to extend therethrough, characterized in that a ring member enclosing each tube with a space therefrom is secured to the tube support plate, a sand is filled in the space to form a cylindrical sand layer surrounding the tube, and a means for preventing leakage of the sand is provided at each axial end of the sand layer.
Claim 3
Dependent Claim
14 words
The sealing structure according to claim 1, wherein the tube is made of ceramics.
Claim 4
Dependent Claim
15 words
The sealing structure according to claim 1, wherein the tube is a heat exchanger tube.
Claim 5
Dependent Claim
16 words
The sealing structure according to claim 1, wherein the tube is a gas permeable porous tube.
Claim 6
Dependent Claim
24 words
The sealing structure according to claim 1, wherein the means for preventing leakage of the sand is a mass of an inorganic fibrous material.
Claim 7
Dependent Claim
24 words
The sealing structure according to claim 1, wherein one of the means for preventing leakage of the sand rests against the tube support plate.
Claim 8
Dependent Claim
28 words
The sealing structure according to claim 1, wherein one of the means for preventing leakage of the sand rests against a stopper secured to the tube support plate.
Claim 9
Dependent Claim
27 words
The sealing structure according to claim 1, wherein one of the means for preventing leakage of the sand rests against a pressing ring inserted in said space.
Claim 10
Dependent Claim
17 words
The sealing structure according to claim 8, wherein the pressing ring is screwed on the ring member.
Claim 11
Dependent Claim
24 words
The sealing structure according to claim 8, wherein the pressing ring and the ring member have flanges, respectively, which are fastened to each other.
Claim 12
Dependent Claim
24 words
The sealing structure according to claim 8, wherein the pressing ring is secured by a bayonet pin engagement of a pin with a groove.
Claim 13
Dependent Claim
30 words
The sealing structure according to claim 11, wherein one of the pin and the groove is provided on the ring member, and the other is provided on the pressing ring.
Claim 14
Dependent Claim
36 words
The sealing structure according to claim 11, wherein one of the pin and the groove is provided on the ring member, and the other is provided on a pressing member against which the pressing ring rests.
References Cited (Backward Citations)
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Cited
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Cited
US3419067A
Cited
US3898163A
Cited
US4172598A
Cited
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Cited
US4196504A
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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) | 1988-09-09 | 1989-03-11 | 1989-09-10 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1992-09-09 | 1993-03-11 | 1993-09-10 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1996-09-09 | 1997-03-11 | 1997-09-10 | $7700.00 | Window Closed / Lapsed |