Patent US3908754A successfully refreshed from Google Patents.
US3908754A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Rotating heat exchanger
Assignee: Individual
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Filing: 1974-01-23
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Granted: 1975-09-30
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Expires: 1994-01-23
Abstract
Abstract In a rotating heat exchanger with parallel annular fins and with pipes running parallel to the axis of rotation traversing these annular fins and conveying a heat carrier, each of these pipes is divided by a separating wall into two compartments which communicate with each other at the closed end of each pipe and, at the other end, communicate with separate chambers in the hollow front of the rotor.
Inventors
- 👤 Nikolaus Laing
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 22:33
CPC Classifications
F; F28; F28D; F28D11/00; F28D11/02; F28D11/04; Y; Y10; Y10S; Y10S165/00; Y10S165/135; Y10S165/139; Y10S165/147; Y10S165/15; Y10S165/151
Claims Analysis
Total Claims: 3
Claim 1
Independent Claim
195 words
A rotary heat exchanger comprising a rotatable matrix of axially spaced sheet metal elements of good thermal conductivity arranged to afford radial passage of air between said elements, at least one L-shaped outer pipe having an axially extending portion closed at one axial end thereof and transversing said sheet metal elements in good thermal contact therewith, a radially extending portion connected at its radial outer end to the end of the axially extending portion opposite said closed end, a first fluid collector space connecting with the radial inner end of the outer pipe, an inner L-shaped pipe having a smaller outer diameter than the inner diameter of the outer pipe positioned within the outer pipe wherein the inner pipe forms one flow channel and the space between the inner pipe and the outer pipe forms another flow channel and wherein the outer pipe extends at its closed end axially beyond the inner pipe to form an axially extending space between the closed end and the end of said inner pipe to provide a fluid connection between the flow channels, and a second fluid collector space connecting with the radial inner end of the inner pipe.
Claim 2
Dependent Claim
195 words
A rotary heat exchanger comprising a rotatable matrix of axially spaced sheet metal elements of good thermal conductivity arranged to afford radial passage of air between said elements, at least one L-shaped outer pipe having an axially extending portion closed at one axial end thereof and transversing said sheet metal elements in good thermal contact therewith, a radially extending portion connected at its radial outer end to the end of the axially extending portion opposite said closed end, a first fluid collector space connecting with the radial inner end of the outer pipe, an inner L-shaped pipe having a smaller outer diameter than the inner diameter of the outer pipe positioned within the outer pipe wherein the inner pipe forms one flow channel and the space between the inner pipe and the outer pipe forms another flow channel and wherein the outer pipe extends at its closed end axially beyond the inner pipe to form an axially extending space between the closed end and the end of said inner pipe to provide a fluid connection between the flow channels, and a second fluid collector space connecting with the radial inner end of the inner pipe.
Claim 3
Dependent Claim
28 words
A rotary heat exchanger according to claim 1 having in addition connecting means providing a rotational fluid connection between said inner and outer pipes and said collector spaces.
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) | 1978-09-29 | 1979-03-31 | 1979-09-30 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1982-09-29 | 1983-03-31 | 1983-09-30 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1986-09-29 | 1987-03-31 | 1987-09-30 | $7700.00 | Window Closed / Lapsed |