Patent US4733718A successfully refreshed from Google Patents.
US4733718A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Heat exchanger bodies made of plastic
Assignee: Roehm GmbH Darmstadt
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Filing: 1985-07-03
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Granted: 1988-03-29
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Expires: 2005-07-03
Abstract
Abstract Heat exchanger or heat accumulator bodies which are simple to produce. The bodies consist of a stack of extruded hollow chamber panels with plane smooth outer walls and webs that join the outer walls in a single piece. The hollow chamber panels are joined to one another in the stack on the front side by locking connections. The locking connections can be produced with an inserted electrical band heater, by glue seams, or by undercut interlockings. The hollow chamber panels are not joined to one another in the in-between areas or are not everywhere joined in the in-between areas.
Inventors
- 👤 Hartmut Schikowsky
- 👤 Heinz Gross
- 👤 Herbert Helm
- 👤 Klaus E. Poehlmann
- 👤 Karl-Heinrich Schanz
- 👤 Heinz Vetter
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 06:20
CPC Classifications
B; B29; B29C; B29C65/00; B29C65/02; B29C65/18; B29C65/34; B29C65/3404; B29C65/342; B29C65/3428; B29C65/344; B29C65/3444; B29C65/346; B29C65/56; B29C65/60; B29C65/606; B29C65/74; B29C65/743; B29C65/7437; B29C66/00; B29C66/01; B29C66/05; B29C66/20; B29C66/21; B29C66/40; B29C66/41; B29C66/43; F; F28; F28D; F28D19/00; F28D19/04; F28D19/041; F28D19/042; F28F; F28F21/00; F28F21/06; F28F21/065; B29C65/3472; B29C65/3476; B29C65/3484; B29C65/3492; B29C65/562; B29C66/303; B29C66/70; B29C66/71; B29L; B29L2024/00; B29L2024/006; B29L2031/00; B29L2031/18; Y; Y10; Y10S; Y10S165/00; Y10S165/009; Y10S165/042; Y10S165/905
Claims Analysis
Total Claims: 8
Claim 1
Independent Claim
116 words
A heat accumulator body for a regenerator, said heat accumulator body being made of plastic and comprising a stack composed of a plurality of extruded hollow chamber panels with plane smooth outer walls and webs that join the outer walls into a single piece, said plurality of hollow chamber panels lying on one another with their outer walls in surface contact, said plurality of hollow chamber panels being joined in the area of their front sides with adjacent hollow chamber panels in the stack and not being joined in at least a part of the in-between area, said plurality of hollow chamber panels being heat welded to one another in the area of the front sides.
Claim 2
Dependent Claim
116 words
A heat accumulator body for a regenerator, said heat accumulator body being made of plastic and comprising a stack composed of a plurality of extruded hollow chamber panels with plane smooth outer walls and webs that join the outer walls into a single piece, said plurality of hollow chamber panels lying on one another with their outer walls in surface contact, said plurality of hollow chamber panels being joined in the area of their front sides with adjacent hollow chamber panels in the stack and not being joined in at least a part of the in-between area, said plurality of hollow chamber panels being heat welded to one another in the area of the front sides.
Claim 3
Dependent Claim
33 words
A heat accumulator body according to claim 1 wherein the hollow chambers in said plurality of hollow chamber panels run parallel to one another in all of said plurality of hollow chamber panels.
Claim 4
Dependent Claim
24 words
A heat accumulator body according to claim 1 wherein the outer walls of said plurality of hollow chamber panels all have the same dimensions.
Claim 5
Dependent Claim
131 words
A heat accumulator body for a regenerator, said heat accumulator body being made of plastic and comprising a stack composed of a plurality of extruded hollow chamber panels with plane smooth outer walls and webs that join the outer walls into a single piece, said plurality of hollow chamber panels lying on one another with their outer walls in surface contact, said plurality of hollow chamber panels being joined in the ara of their front sides with adjacent hollow chamber panels in the stack and not being joined in at least a part of the in-between area, said plurality of hollow chamber panels being heat welded together by a plurality of band heaters that have been heated to a temperature in the melting range of the plastic by application of voltage.
Claim 6
Dependent Claim
131 words
A heat accumulator body for a regenerator, said heat accumulator body being made of plastic and comprising a stack composed of a plurality of extruded hollow chamber panels with plane smooth outer walls and webs that join the outer walls into a single piece, said plurality of hollow chamber panels lying on one another with their outer walls in surface contact, said plurality of hollow chamber panels being joined in the ara of their front sides with adjacent hollow chamber panels in the stack and not being joined in at least a part of the in-between area, said plurality of hollow chamber panels being heat welded together by a plurality of band heaters that have been heated to a temperature in the melting range of the plastic by application of voltage.
Claim 7
Dependent Claim
33 words
A heat accumulator body according to claim 4 wherein the hollow chambers in said plurality of hollow chamber panels run parallel to one another in all of said plurality of hollow chamber panels.
Claim 8
Dependent Claim
24 words
A heat accumulator body according to claim 4 wherein the outer walls of said plurality of hollow chamber panels all have the same dimensions.
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) | 1991-03-29 | 1991-09-28 | 1992-03-29 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1995-03-29 | 1995-09-28 | 1996-03-29 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1999-03-29 | 1999-09-28 | 2000-03-29 | $7700.00 | Window Closed / Lapsed |