US4856577A
Expired / Lapsed
US
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Rotary regenerative heat exchanging ceramic body
Assignee: NGK Insulators Ltd
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Filing: 1988-04-12
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Granted: 1989-08-15
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Expires: 2008-04-12
Abstract
Abstract A rotary regenerative heat exchanging ceramic body including a plurality of matrix segments. The matrix segments of ceramic honeycomb structures are joined by a bonding material into the rotary regenerative heat exchanging ceramic body in the form of a disk. Each the matrix segments includes cells whose shapes have anisotropy in Young's modulus in sectional planes perpendicular to through-apertures. The matrix segments are arranged so that directions in which the Young's moduli of the segments are smaller are substantially coincident with circumferential directions of the disk at least at four locations near an outer circumference of the disk.
Inventors
- 👤 Masanori Katsu
- 👤 Mikio Makino
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-06 08:58
CPC Classifications
F; F28; F28F; F28F21/00; F28F21/04; F28D; F28D19/00; F28D19/04; F28D19/041; F28D19/042; Y; Y10; Y10S; Y10S165/00; Y10S165/009; Y10S165/013; Y10S165/016; Y10T; Y10T156/00; Y10T156/10; Y10T428/00; Y10T428/24; Y10T428/24149; Y10T428/24165; Y10T428/24744
Claims Analysis
Total Claims: 7
Claim 1
Independent Claim
106 words
A rotary regenerative heat exchanging ceramic body, comprising a plurality of ceramic honeycomb structure matrix segments joined to form a disk, each of said segments comprising a plurality of intersecting partition walls defining a plurality of cells having anisotropic Young's moduli in their cross-sectional planes; wherein said matrix segments are arranged such that directions in which the Young's modulus of the matrix segments is low are substantially coincident with circumferential directions of said disk at least at four locations near an outer circumference of said disk, and directions in which the Young's modulus of the matrix segments is high are substantially perpendicular to said circumferential directions.
Claim 2
Dependent Claim
106 words
A rotary regenerative heat exchanging ceramic body, comprising a plurality of ceramic honeycomb structure matrix segments joined to form a disk, each of said segments comprising a plurality of intersecting partition walls defining a plurality of cells having anisotropic Young's moduli in their cross-sectional planes; wherein said matrix segments are arranged such that directions in which the Young's modulus of the matrix segments is low are substantially coincident with circumferential directions of said disk at least at four locations near an outer circumference of said disk, and directions in which the Young's modulus of the matrix segments is high are substantially perpendicular to said circumferential directions.
Claim 3
Dependent Claim
18 words
A rotary regenerative heat exchanging ceramic body according to claim 1, wherein said cells are rectangular in shape.
Claim 4
Dependent Claim
29 words
A rotary regenerative heat exchanging ceramic body according to claim 2, wherein a ratio of a short side to a long side of said rectangular cells is about 1:√3.
Claim 5
Dependent Claim
18 words
A rotary regenerative heat exchanging ceramic body according to claim 1, wherein said cells are triangular in shape.
Claim 6
Dependent Claim
21 words
A rotary regenerative heat exchanging ceramic body according to claim 4, wherein said triangular shape is that of an isosceles triangle.
Claim 7
Dependent Claim
23 words
A rotary regenerative heat exchanging ceramic body according to claim 1, wherein each of said matrix segments forms a sector of said disk.
References Cited (Backward Citations)
US4357987A
Cited
US4381815A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1992-08-14 | 1993-02-13 | 1993-08-15 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1996-08-14 | 1997-02-13 | 1997-08-15 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2000-08-14 | 2001-02-13 | 2001-08-15 | $7700.00 | Window Closed / Lapsed |