Patent US5052477A successfully refreshed from Google Patents.
US5052477A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Pipe for coolant condenser
Assignee: Marunaka Seisakusho YK
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Filing: 1990-05-01
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Granted: 1991-10-01
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Expires: 2010-05-01
Abstract
Abstract A plurality of short pipe body sections can be coupled to one another with a coupling which has cylindrical contact about the inner and/or outer surfaces of the pipes to obtain a pipe having a desired length. The coupling also serves as a partitioning plate to block flow of coolant through pipe.
Inventors
- 👤 Ichio Nakajima
- 👤 Tsuneo Kousaka
- 👤 Noboru Okada
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-09 20:49
CPC Classifications
F; F28; F28F; F28F9/00; F28F9/02; F28F9/0202; F28F9/0204; F28F9/0209; F28F9/0212; F28F2220/00
Claims Analysis
Total Claims: 9
Claim 1
Independent Claim
93 words
In a coolant condenser having a pair of header pipes spanned by a plurality of heat exchange tubes having ends of predetermined length inserted in slots in the header pipes, the improvement wherein said header pipe is formed of at least two tubular body sections axially joined at their ends by a coupling comprising a first cylindrical section and a second cylindrical section integrally formed with an intermediate partition section occluding passage therethrough said first and second cylindrical sections being adapted to securely engage a selected surface of the first and second pipes.
Claim 2
Dependent Claim
93 words
In a coolant condenser having a pair of header pipes spanned by a plurality of heat exchange tubes having ends of predetermined length inserted in slots in the header pipes, the improvement wherein said header pipe is formed of at least two tubular body sections axially joined at their ends by a coupling comprising a first cylindrical section and a second cylindrical section integrally formed with an intermediate partition section occluding passage therethrough said first and second cylindrical sections being adapted to securely engage a selected surface of the first and second pipes.
Claim 3
Dependent Claim
37 words
The improvement according to claim 1 wherein said first cylindrical section is adapted to engage the exterior surface of one pipe and the second cylindrical section is adapted to engage the inner surface of the other pipe.
Claim 4
Dependent Claim
25 words
The improvement according to claim 1, wherein said first cylindrical section and said cylindrical section are adapted to engage the exterior surfaces of each pipe.
Claim 5
Dependent Claim
26 words
The improvement according to claim 1, wherein said first cylindrical section and said second cylindrical section are adapted to engage the interior surfaces of each pipe.
Claim 6
Dependent Claim
16 words
The improvement according to claim 1, wherein at least one of said cylindrical sections is tapered.
Claim 7
Dependent Claim
24 words
The improvement according to claim 1, wherein said coupling is provided with an annular flange adapted to seat between the ends of adjacent pipes.
Claim 8
Dependent Claim
22 words
The improvement according to claim 1, wherein said first cylindrical section is cup-shaped and said second cylindrical section comprises a solid plug.
Claim 9
Dependent Claim
14 words
The improvement according to claim 1, wherein said plug is H-shaped in cross section.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1994-09-30 | 1995-04-01 | 1995-10-01 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1998-09-30 | 1999-04-01 | 1999-10-01 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2002-09-30 | 2003-04-01 | 2003-10-01 | $7700.00 | Window Closed / Lapsed |