Patent US3610331A successfully refreshed from Google Patents.
US3610331A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Heat exchanger
Assignee: Fried Krupp AG
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Filing: 1970-03-10
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Granted: 1971-10-05
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Expires: 1990-03-10
Abstract
Abstract A heat exchanger, especially through flow heater for the preparation of hot water, which is composed of a plurality of discs arranged adjacent to each other. Each of said discs comprises two complementary plates which are connected to each other by cementing, welding or the like, and when so connected form with each other spiral-shaped flow passage means.
Inventors
- 👤 Helmut Schreiber
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 21:44
CPC Classifications
F; F28; F28F; F28F3/00; F28F3/08; F28F3/083; F28D; F28D9/00; F28D9/04; Y; Y10; Y10S; Y10S165/00; Y10S165/355; Y10S165/356; Y10S165/361
Claims Analysis
Total Claims: 3
Claim 1
Independent Claim
105 words
A heat exchanger, especially through-flow heater, for the preparation of hot water, which includes: a plurality of disc means, each of said disc means comprising two plates provided with spiral-shaped depressions and elevations and so engaging each other as to define with each other spiral-shaped flow passage means, each two adjacent disc means having their flow passage means respectively arranged for connection with a heat discharging and a heat receiving fluid medium, and the disc means are so placed one upon another that the plate elevations of the flow passage are located in the corresponding depressions of the plate pertaining to the next disc means.
Claim 2
Dependent Claim
105 words
A heat exchanger, especially through-flow heater, for the preparation of hot water, which includes: a plurality of disc means, each of said disc means comprising two plates provided with spiral-shaped depressions and elevations and so engaging each other as to define with each other spiral-shaped flow passage means, each two adjacent disc means having their flow passage means respectively arranged for connection with a heat discharging and a heat receiving fluid medium, and the disc means are so placed one upon another that the plate elevations of the flow passage are located in the corresponding depressions of the plate pertaining to the next disc means.
Claim 3
Dependent Claim
21 words
A heat exchanger according to claim 1, which includes heat conductive water soluble means interposed between each two adjacent disc 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) | 1974-10-04 | 1975-04-05 | 1975-10-05 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-10-04 | 1979-04-05 | 1979-10-05 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-10-04 | 1983-04-05 | 1983-10-05 | $7700.00 | Window Closed / Lapsed |