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US3231015A Expired / Lapsed US ⏱️ 0.0 years remaining

Graphite-plate heat exchange apparatus

Assignee: Babcock and Wilcox Co
•
Filing: 1963-05-01
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Granted: 1966-01-25
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Expires: 1983-05-01
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Abstract

Abstract 1,062,241. Plate type heat exchangers. BABCOCK & WILCOX CO. April 30, 1964 [May 1, 1963], No. 18000/64. Heading F4S. A cross-flow plate type heat exchanger for heating air by furnace waste gases comprises a series of parallel, spaced, graphite plates 50 arranged in plate packs 33 individually resiliently supported between frames 36 and 37, formed of angle members 60, 70 and T-section members 61, 71, the plates being bonded to and separated by end plates 51, 52 defining parallel gas and air flow paths extending perpendicular to each other. Four adjustable spring-loaded ties 38 interconnect the frames 36, 37 of each platepack and resilient sealing material is interposed between the ends of the packs and the frames in spaces (48), Fig. 10 (not shown). The plate-packs are bolted between upper and lower support structures (40) and (34), Fig. 2 (not shown), and gaps (42), Fig. 10, formed between the plate-packs are blocked off by the horizontal plate (64) of an upper cross-member (63) to prevent the flow of the furnace waste gases between the platepacks. A bellows expansion joint (41) allows relative movement between the heat-exchanger and gas ducting.

Inventors

  • 👤 Paul H Koch

Bibliographic Details

Application Number —
Jurisdiction US
Data Source google_patents
Last Synchronized 2026-10-24 22:45
CPC Classifications
F; F28; F28D; F28D9/00; F28D9/0062; F23; F23M; F23M20/00; F28F; F28F21/00; F28F21/02; F28F2250/00; F28F2250/10; F28F2250/102; F28F2265/00; F28F2265/26; Y; Y10; Y10S; Y10S165/00; Y10S165/921

Claims Analysis

Total Claims: 1
Claim 1
Independent Claim 108 words
AN AIR HEATER FOR INDIRECT EXCHANGE OF HEAT FROM COMBUSTION FLUE GAS AT A TEMPERATURE BELOW ITS DEW POINT TO AIR COMPRISING A PLURALITY OF GRAPHITE CELLS, EACH OF SAID CELLS INCLUDING A PLURALITY OF GRAPHITE PLATES AND GRAPHITE SPACER MEMBERS DISPOSED BETWEEN SAID PLATES TO FORM ALTERNATE AIR AND FLUE GAS LANES, A STRUCTURAL SUPPORT SYSTEM ARRANGED TO CARRY THE WEIGHT OF SAID CELLS, METALLIC CONTAINMENT FRAME MEANS ENGAGED WITH EACH OF SAID CELLS ON OPPOSITE SIDES THEREOF AND RIGIDLY CONNECTED TO SAID STRUCTURAL SUPPORT SYSTEM, AND MEANS PROHIBITING THE CONTACT OF SAID FLUE GAS WITH SUBSTANTIALLY ALL OF THE SURFACE AREA OF SAID CONTAINMENT FRAME MEANS.

References Cited (Backward Citations)

US2735660A Cited
GB235149A Cited
US1559180A Cited
US2341549A Cited
US2467935A Cited
US2728561A Cited
US2887304A Cited
US2887303A Cited
US2970811A Cited

USPTO Annuity & Maintenance Windows

Annuity Stage Window Opens Payment Deadline Surcharge Period Until Estimated Fee Status
3.5 Years (Year 4) 1969-01-24 1969-07-26 1970-01-25 $2000.00 Window Closed / Lapsed
7.5 Years (Year 8) 1973-01-24 1973-07-26 1974-01-25 $3760.00 Window Closed / Lapsed
11.5 Years (Year 12) 1977-01-24 1977-07-26 1978-01-25 $7700.00 Window Closed / Lapsed

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