Patent US921702A successfully refreshed from Google Patents.
US3746084A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Heat-exchanger comprising a plurality of helically wound pipe elements
Assignee: Individual
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Filing: 1971-04-01
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Granted: 1973-07-17
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Expires: 1991-04-01
Abstract
Abstract In a heat-exchanger comprising a plurality of helically wound pipe elements stacked on top of each other and having their ends connected to risers all the risers are located inside the jacket of the heat-exchanger but radially outside the stack and within the same half of the circumference thereof. The design makes all the connections of the elements readily accessible and permits convenient demounting and remounting of individual elements by lateral extraction of a faulty element from the stack and reinsertion of it upon repair work. The stack is preferably composed by two or more sections any such section being provided with its own risers.
Inventors
- 👤 J Ostbo
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-22 22:47
CPC Classifications
F; F28; F28D; F28D7/00; F28D7/04; Y; Y10; Y10S; Y10S165/00; Y10S165/355; Y10S165/40; Y10S165/427; Y10S165/436; Y10S165/437; Y10S165/438
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
352 words
A heat exchanger comprising a. a plurality of separate spirally wound pipe elements positioned one above the other in a vertical array, b. said array of spirally wound pipe elements being divided into a plurality of sections, c. each section of spirally wound pipe elements being connected to its own separate pair of risers, d. each separate pair of risers comprising an inlet riser and an outlet riser, and each spirally wound pipe element of the section associated with a given pair of risers having an inlet portion connected to the inlet riser and an outlet portion connected to the outlet riser, e. all risers being located closely adjacent to the periphery of said vertical array of spirally wound pipe elements, f. all pairs of risers that extend past more than one section of spirally wound pipe elements being located within the same half of the circumference of said vertical array, and g. a jacket surrounding both the aforesaid vertical array of spirally wound pipe elements and all pairs of risers, said jacket consisting of upper and lower end wall portions and an annular side wall portion interconnecting said two end wall portions, the annular side wall portion of said jacket completely surrounding both said array of spirally wound pipe elements and all pairs of risers, one end wall portion containing an inlet means for heat exchange fluid and the other end wall portion containing an outlet means for the same heat exchange fluid, said inlet means and said outlet means being in open communication with both the exterior of the entire array of spirally wound pipe elements and the exterior of all pairs of risers, said pairs of risers communicating with the space exterior to said jacket by means of passageways that extend through one of said end wall portions of said jacket that is detachable from said annular side wall portion of said jacket, whereby heat exchange fluid can flow into said jacket through said inlet means, around both said array of spirally wound pipe elements and all pairs of risers, and out of said jacket through said outlet means.
Claim 2
Dependent Claim
352 words
A heat exchanger comprising a. a plurality of separate spirally wound pipe elements positioned one above the other in a vertical array, b. said array of spirally wound pipe elements being divided into a plurality of sections, c. each section of spirally wound pipe elements being connected to its own separate pair of risers, d. each separate pair of risers comprising an inlet riser and an outlet riser, and each spirally wound pipe element of the section associated with a given pair of risers having an inlet portion connected to the inlet riser and an outlet portion connected to the outlet riser, e. all risers being located closely adjacent to the periphery of said vertical array of spirally wound pipe elements, f. all pairs of risers that extend past more than one section of spirally wound pipe elements being located within the same half of the circumference of said vertical array, and g. a jacket surrounding both the aforesaid vertical array of spirally wound pipe elements and all pairs of risers, said jacket consisting of upper and lower end wall portions and an annular side wall portion interconnecting said two end wall portions, the annular side wall portion of said jacket completely surrounding both said array of spirally wound pipe elements and all pairs of risers, one end wall portion containing an inlet means for heat exchange fluid and the other end wall portion containing an outlet means for the same heat exchange fluid, said inlet means and said outlet means being in open communication with both the exterior of the entire array of spirally wound pipe elements and the exterior of all pairs of risers, said pairs of risers communicating with the space exterior to said jacket by means of passageways that extend through one of said end wall portions of said jacket that is detachable from said annular side wall portion of said jacket, whereby heat exchange fluid can flow into said jacket through said inlet means, around both said array of spirally wound pipe elements and all pairs of risers, and out of said jacket through said outlet means.
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) | 1976-07-16 | 1977-01-15 | 1977-07-17 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-07-16 | 1981-01-15 | 1981-07-17 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-07-16 | 1985-01-15 | 1985-07-17 | $7700.00 | Window Closed / Lapsed |