US3739841A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Indirect heat transfer apparatus
Assignee: Phillips Petroleum Co
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Filing: 1971-03-24
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Granted: 1973-06-19
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Expires: 1991-03-24
Abstract
Abstract An indirect heat transfer apparatus has a second conduit extending through a first conduit with heat transfer members on the outer surface of the second conduit. The total surface area of the heat transfer members per unit length of the second conduit changes for altering the incremental heat transfer rate between first and second materials flowing through their respective first and second conduits.
Inventors
- 👤 W Small
- 👤 D Petree
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 06:36
CPC Classifications
F; F28; F28F; F28F1/00; F28F1/10; F28F1/12; F28D; F28D7/00; F28D7/10; F28D7/106; F28D7/16; F28D7/1615; F28D21/00; F28D2021/0019; F28D2021/0022
Claims Analysis
Total Claims: 4
Claim 1
Independent Claim
205 words
An indirect heat transfer apparatus for maintaining a preselected heat transfer between first and second materials flowing therethrough, comprising: a first conduit having a chamber and an inlet and an outlet end for the passage of a first material through said chamber; a second conduit having a chamber and inlet and outlet ends with a portion of said second conduit being positioned within the chamber of the first conduit for the passage of a second material through said second conduit chamber; and means for controlling the temperature of the second material and maintaining said material on a preselected temperature profile during the passage of the second material through the second conduit and during exothermic chemical reactions with the second conduit, said means comprising a plurality of heat transfer members at spaced-apart locations relative one to the other on the outer surface of the second conduit portion within the chamber of the first conduit with the total surface area of the heat transfer members for each unit length of the second conduit changing in relation to the incremental increase of distance said unit length is positioned from the inlet end of the first conduit and the temperature of the second material at each respective unit length.
Claim 2
Dependent Claim
205 words
An indirect heat transfer apparatus for maintaining a preselected heat transfer between first and second materials flowing therethrough, comprising: a first conduit having a chamber and an inlet and an outlet end for the passage of a first material through said chamber; a second conduit having a chamber and inlet and outlet ends with a portion of said second conduit being positioned within the chamber of the first conduit for the passage of a second material through said second conduit chamber; and means for controlling the temperature of the second material and maintaining said material on a preselected temperature profile during the passage of the second material through the second conduit and during exothermic chemical reactions with the second conduit, said means comprising a plurality of heat transfer members at spaced-apart locations relative one to the other on the outer surface of the second conduit portion within the chamber of the first conduit with the total surface area of the heat transfer members for each unit length of the second conduit changing in relation to the incremental increase of distance said unit length is positioned from the inlet end of the first conduit and the temperature of the second material at each respective unit length.
Claim 3
Dependent Claim
122 words
An apparatus, as set forth in claim 1, wherein the second conduit comprises: an inlet header attached to the inlet end of the second conduit; an outlet header attached to the outlet end of the second conduit; a plurality of second conduit portions extending traversely through the chamber of the first conduit generally perpendicularly to the direction of flow of the first material through said first conduit with the portion of each second conduit portion within the chamber of the first conduit forming a separate unit length of the second conduit, being spaced one from the other along the length of the first conduit, and with each second conduit portion being attached to and in communication with the inlet and outlet headers.
Claim 4
Dependent Claim
141 words
An appAratus, as set forth in claim 1, wherein the second conduit comprises: an inlet header attached to the inlet end of the second conduit, an outlet header attached to the outlet end of the second conduit, a plurality of second conduit portions each extending traversely through the chamber of the first conduit substantially perpendicularly to the direction of flow of the first material through the first conduit with a plurality of adjacently positioned second conduit portions within the chamber of the first conduit forming a separate unit length of the second conduit, said second conduit portions within the chamber of the first conduit each being spaced one from the other, each unit length being positioned along the length of the first conduit, and with each second conduit portion being attached to and in communication with the inlet and outlet headers.
References Cited (Backward Citations)
US3223152A
Cited
US3543843A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1976-06-18 | 1976-12-18 | 1977-06-19 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-06-18 | 1980-12-18 | 1981-06-19 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-06-18 | 1984-12-18 | 1985-06-19 | $7700.00 | Window Closed / Lapsed |