US4577678A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Storage material for heat transfer
Assignee: Kraftanlagen AG
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Filing: 1984-06-23
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Granted: 1986-03-25
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Expires: 2004-06-23
Abstract
Abstract The storage material is intended for the transfer of heat between gas streams in heat exchangers, and has stick-like molded spacing elements (12) on the one hand, and a plurality of plate-like molded elements (12) of heat-resistant plastic serving as storage elements on the other, which are assembled into storage blocks. Polyetherimide is used as the material for the molded elements (10; 12), which combines sufficiently high heat resistance with resistance to aggressive chemical influences.
Inventors
- 👤 Martin Frauenfeld
- 👤 Rudiger von Wedel
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 18:59
CPC Classifications
F; F28; F28F; F28F21/00; F28F21/06; F28F21/065; F28D; F28D19/00; F28D19/04; F28D19/041; F28D19/042; F28F2240/00; Y; Y10; Y10S; Y10S165/00; Y10S165/009; Y10S165/042; Y10S165/905
Claims Analysis
Total Claims: 12
Claim 1
Independent Claim
53 words
Storage material for the transfer of heat between gas streams in heat exchangers, composed of stick-like molded spacing elements and a plurality of plate-like molded elements (12) serving as storage elements of heat-resistant plastic, which are assembled into storage blocks, characterized in that the molded elements (10; 12; 32) are made from polyetherimide.
Claim 2
Dependent Claim
53 words
Storage material for the transfer of heat between gas streams in heat exchangers, composed of stick-like molded spacing elements and a plurality of plate-like molded elements (12) serving as storage elements of heat-resistant plastic, which are assembled into storage blocks, characterized in that the molded elements (10; 12; 32) are made from polyetherimide.
Claim 3
Dependent Claim
27 words
Storage material of claim 1, characterized in that the stick-like molded spacing elements and the heat-storing plate-like molded elements (12; 10) are joined together by ultrasonic welding.
Claim 4
Dependent Claim
22 words
Storage material of claim 1, characterized in that the molded elements (10; 12; 32) are assembled together into storage blocks by cementing.
Claim 5
Dependent Claim
39 words
Storage material of claim 3, characterized by a bonding of the molded elements (10; 12; 32) by means of adhesive cementing with the aid of cements on the basis of polyurethane, silicone, nonaminic epoxy resins or polyamide hot-melt adhesives.
Claim 6
Dependent Claim
36 words
Storage material of claim 3, characterized by a bonding of the molded elements (10; 12; 32) by means of diffusion cementing using a solvent for polyetherimide, preferably methylene chloride, in a concentration of 1 to 5%.
Claim 7
Dependent Claim
47 words
Storage material of claim 1, characterized in that the plate-like and the stick-like molded elements (10; 12; 32) have button-like or stick-like joining member (20; 24; 26) constituting snap fasteners in the junction areas to serve as alternating male and female fasteners for assembling the storage block.
Claim 8
Dependent Claim
28 words
Storage material of claim 3, characterized in that the plate-like molded elements (10) with stick-like molded elements (34; 36) formed thereon are constructed as integral combination elements (32).
Claim 9
Dependent Claim
28 words
Storage material of claim 1, characterized in that the storage blocks are composed of perforated, plate-like molded elements (10) and stick-like molded elements (12) provided with rivet heads.
Claim 10
Dependent Claim
35 words
Storage material of claim 8, characterized in that the stick-like molded elements (12) are joined with the plate-like molded elements (10) to form the storage block by swaging the rivet heads by means of ultrasound.
Claim 11
Dependent Claim
44 words
Storage material of claim 1, characterized in that the storage blocks are composed of slotted, plate-like and stick-like molded elements (10; 12), the stick-like molded elements (12) having molded studs (24) which are snapped into the slots (26) in the plate-like molded elements (10).
Claim 12
Dependent Claim
27 words
Storage material of any of claim 1, characterized in that the polyetherimide is reinforced by embedded fibers or fiber fabrics, preferably glass fibers or glass fiber fabrics.
References Cited (Backward Citations)
US2706109A
Cited
GB888636A
Cited
FR2103583A1
Cited
FR2166063A1
Cited
NL7407020A
Cited
FR2230403A1
Cited
FR2267534A1
Cited
US4114597A
Cited
FR2339830A1
Cited
EP0010817A1
Cited
DE3007525A1
Cited
FR2482116A1
Cited
GB2075656A
Cited
DE3137296A1
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1989-03-24 | 1989-09-23 | 1990-03-25 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1993-03-24 | 1993-09-23 | 1994-03-25 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1997-03-24 | 1997-09-23 | 1998-03-25 | $7700.00 | Window Closed / Lapsed |