Exhaust gas purifying filter
원문보기
IPC분류정보
국가/구분 |
United States(US) Patent
등록
|
국제특허분류(IPC7판) |
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출원번호 |
US-0506083
(2003-02-13)
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등록번호 |
US-7297175
(2007-11-20)
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우선권정보 |
JP-2002-068579(2002-03-13) |
국제출원번호 |
PCT/JP03/001503
(2003-02-13)
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§371/§102 date |
20040831
(20040831)
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국제공개번호 |
WO03/076773
(2003-09-18)
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발명자
/ 주소 |
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출원인 / 주소 |
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대리인 / 주소 |
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인용정보 |
피인용 횟수 :
8 인용 특허 :
9 |
초록
▼
There is disclosed an exhaust gas purifying filter of the present invention comprising a honeycomb structure formed of a porous ceramic material and including: a large number of through-holes 3; plugged portions 10 formed in one end portion of each of predetermined through-holes 3 and in the other e
There is disclosed an exhaust gas purifying filter of the present invention comprising a honeycomb structure formed of a porous ceramic material and including: a large number of through-holes 3; plugged portions 10 formed in one end portion of each of predetermined through-holes 3 and in the other end portion of each of remaining through-holes 3; and partition walls 2 partitioning the through-holes 3 and formed into filter layers, characterized in that a plugging length is non-uniform for each plugged portion 10, and the filter has characteristics such as high porosity and thin wall while hardly causing defects such as chipping and falling-off of the plugged portions during packing, transporting, and handling.
대표청구항
▼
The invention claimed is: 1. An exhaust gas purifying filter, comprising: a honeycomb structure formed of a porous ceramic material having a first and second axial ends and defining a plurality of through-holes, a plurality of through-holes being sealed in one end portion with a plug to form a pred
The invention claimed is: 1. An exhaust gas purifying filter, comprising: a honeycomb structure formed of a porous ceramic material having a first and second axial ends and defining a plurality of through-holes, a plurality of through-holes being sealed in one end portion with a plug to form a predetermined pattern of sealed through-holes at the first axial end, and the remaining through-holes being sealed in the second axial end portion with a plug; and partition walls partitioning the through-holes and formed into filter layers; wherein: the length of each plug is non-uniform; and the length of the plugs gradually shorten in a step-wise manner from an outer peripheral portion of an axial end of the filter to a central portion of the axial end. 2. An exhaust gas purifying filter, comprising: a honeycomb structure formed of a porous ceramic material having a first and second axial ends and defining a plurality of through-holes, a plurality of through-holes being sealed in one end portion with a plug to form a predetermined pattern of sealed through-holes at the first axial end, and the remaining through-holes being sealed in the second axial end portion with a plug; and partition walls partitioning the through-holes and formed into filter layers; wherein each plug is configured so that one end of the plug tapers in length inwardly so that a length of the plug at an outer diameter is longer than a length of the plug at an inner diameter; and the length of the plugs gradually shorten in a step-wise manner from an outer peripheral portion of an axial end of the filter to a central portion of the axial end. 3. The exhaust gas purifying filter according to claim 1, wherein the honeycomb structure is formed of at least one material selected from the group consisting of cordierite, zirconium phosphate, aluminum titanate, LAS, and silicon carbide. 4. The exhaust gas purifying filter according to claim 2, wherein the honeycomb structure is formed of at least one material selected from the group consisting of cordierite, zirconium phosphate, aluminum titanate, LAS, and silicon carbide. 5. The exhaust gas purifying filter according to claim 1, further comprising a catalyst. 6. The exhaust gas purifying filter according to claim 2, further comprising a catalyst. 7. The exhaust gas purifying filter according to claim 5, wherein the catalyst contains at least one element selected from the group consisting of Pt, Pd, Rh, K, Ba, Li, and Na. 8. The exhaust gas purifying filter according to claim 6, wherein the catalyst contains at least one element selected from the group consisting of Pt, Pd, Rh, K, Ba, Li, and Na.
이 특허에 인용된 특허 (9)
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Saito Koichi (Osaka JPX) Ueda Kenji (Osaka JPX) Ikeda Yasuo (Himeji JPX) Ono Tetsuji (Amagasaki JPX), Catalyst for purifying diesel engine exhaust gases.
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Lachman Irwin M. ; Patel Mallanagouda D. ; Williams Jimmie L. ; Swarood Srinivas H., Catalytic reactor system.
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Kotani Wataru (Nagoya JPX) Hamaguchi Kunikazu (Kasugai JPX) Kasai Yoshiyuki (Nagoya JPX), Ceramic honeycomb structure with grooves and outer coating, process of producing the same, and coating material used in.
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Naruse Kazuya,JPX ; Ohno Satoshi,JPX ; Shimato Koji,JPX ; Okazoe Hiroshi,JPX ; Iwahiro Seiki,JPX, Ceramic structural body.
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Gadkaree Kishor P. ; Johnson Timothy V., Device for removal of contaminants from fluid streams.
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Ichikawa Yukihito (Nagoya JPX) Kasai Yoshiyuki (Nagoya JPX) Ono Yoshiro (Nagoya JPX), Exhaust gas filter and apparatus for treating exhaust gases.
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Kasai Yoshiyuki,JPX ; Ono Yoshiro,JPX ; Yamada Toshio,JPX, Exhaust gas purifying filter using honeycomb monolith with random length sealing portions.
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Oyobe Kazuo (Ohbu JPX) Nomura Etsuji (Ichinomiya JPX) Matsui Kazuma (Toyohashi JPX) Fukutani Masanori (Nagoya JPX) Ito Kazuyuki (Nishio JPX) Miwa Naoto (Tsushima JPX) Ito Keiji (Kariya JPX), Fitter apparatus for purifying exhaust gases.
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Ogawa Yutaka (Nagoya JPX) Yamada Shunichi (Nagoya JPX) Hamanaka Toshiyuki (Suzuka JPX), Method of sealing open ends of ceramic honeycomb structural body.
이 특허를 인용한 특허 (8)
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Arnold, Mirko; Kotrel, Stefan; Siani, Attilio; Siemund, Stephan; Schmitz, Thomas; Rabe, Burkhard; Gramiccioni, Gary A; Seel, Oliver; Neubauer, Torsten; Wassermann, Knut, Automotive catalyst composites having a two-metal layer.
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Mizutani, Takashi, Ceramic filter.
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Yamada, Toshio; Hirakawa, Toshihiro, Dust collecting honeycomb filter.
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Hayakawa, Syuhei, Honeycomb filter.
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Miwa, Shinichi; Miyairi, Yukio, Honeycomb structure and honeycomb catalyst.
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Brown, Michael C; Ferri, Luiz Eduardo; Hagg, Ralph Henry; Parker, Robert Daniel, Method for manufacturing ceramic filter.
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Gadkaree, Kishor Purushottam; Johnson, Benedict Yorke; Kuang, Pei Qiong; Liu, Anbo; Shi, Youchun, Sorbent bodies comprising activated carbon, processes for making them, and their use.
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Gadkarec, Kishor Purushottam; Johnson, Benedict Y; Kuang, Peiqiong Q; Liu, Anbo; Shi, Youchun, Sorbent comprising activated carbon, process for making same and use thereof.
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