Patent US3762464A successfully refreshed from Google Patents.
US3762464A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Heat exchanger
Assignee: JAPAN ENGINEERING AND TRADING
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Filing: 1971-12-29
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Granted: 1973-10-02
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Expires: 1991-12-29
Abstract
Abstract A heat exchanger of the construction wherein a plurality of tubes for passing dust-containing gas therethrough are arranged substantially in parallel with a rotating shaft, a passage for a fluid to be heated is provided among the cluster of the tubes, scraper members are disposed within the individual tubes, one for each, and means are provided for driving the shaft, so that the rotation of the shaft enables the scraper members to slide down gravitationally within the revolving tubes to remove the dust from the inner wall surfaces thereof.
Inventors
- 👤 M Takahashi
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 14:47
CPC Classifications
F; F28; F28G; F28G1/00; F28G1/06; B; B08; B08B; B08B9/00; B08B9/02; B08B9/027; B08B9/04; B08B9/043; B08B9/045; F28D; F28D11/00; F28D11/02; F28D11/04; F28F; F28F19/00; F28F19/008
Claims Analysis
Total Claims: 7
Claim 1
Independent Claim
89 words
A heat exchanger of the construction wherein a plurality of tubes for passing dust-containing gas therethrough are arranged substantially in parallel with a rotating shaft, a passage for a fluid to be heated is provded among the cluster of the tubes, scraper members are disposed within the individual tubes, one for each, and means are provided for driving the shaft, so that the rotation of the shaft enables the scraper members to slide down gravitationally within the revolving tubes to remove the dust from the inner wall surfaces thereof.
Claim 2
Dependent Claim
89 words
A heat exchanger of the construction wherein a plurality of tubes for passing dust-containing gas therethrough are arranged substantially in parallel with a rotating shaft, a passage for a fluid to be heated is provded among the cluster of the tubes, scraper members are disposed within the individual tubes, one for each, and means are provided for driving the shaft, so that the rotation of the shaft enables the scraper members to slide down gravitationally within the revolving tubes to remove the dust from the inner wall surfaces thereof.
Claim 3
Dependent Claim
117 words
A heat exchanger comprising at least two partition plates fixedly mounted in a spaced relationship on a common rotating shaft, a plurality of tubes held by said partition plates substantially in parallel with the rotating shaft, a stationary shell which houses the cluster of tubes revolvably and has an inlet and an outlet, a passage for a fluid to be heated defined by the shell, partition plates, and cluster of tubes, a distributing chamber for the hot gas for heat exchange which is provided adjacent the inlets of the tubes in communication therewith, a collecting chamber provided adjacent the outlets of the tubes in communication therewith, and scraper members disposed within the individual tubes, one for each.
Claim 4
Dependent Claim
117 words
A heat exchanger comprising at least two partition plates fixedly mounted in a spaced relationship on a common rotating shaft, a plurality of tubes held by said partition plates substantially in parallel with the rotating shaft, a stationary shell which houses the cluster of tubes revolvably and has an inlet and an outlet, a passage for a fluid to be heated defined by the shell, partition plates, and cluster of tubes, a distributing chamber for the hot gas for heat exchange which is provided adjacent the inlets of the tubes in communication therewith, a collecting chamber provided adjacent the outlets of the tubes in communication therewith, and scraper members disposed within the individual tubes, one for each.
Claim 5
Dependent Claim
24 words
A heat exchanger according to claim 1 wherein the scraper members are elongate metal bars extended beyond the entire length of the individual tubes.
Claim 6
Dependent Claim
13 words
A heat exchanger according to claim 1 wherein the scraper members are chains.
Claim 7
Dependent Claim
18 words
A heat exchanger according to claim 1 wherein the scraper members are a plurality of flat steel bars.
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) | 1976-10-01 | 1977-04-02 | 1977-10-02 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-10-01 | 1981-04-02 | 1981-10-02 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-10-01 | 1985-04-02 | 1985-10-02 | $7700.00 | Window Closed / Lapsed |