Patent US4444721A successfully refreshed from Google Patents.
US4444721A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Resilient supporting member for exhaust gas catalytic converter
Assignee: Piolax Inc
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Filing: 1982-03-29
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Granted: 1984-04-24
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Expires: 2002-03-29
Abstract
Abstract A resilient supporting member for an exhaust gas catalytic converter which has a thin plate of ceramic fiber, an edgewise peripheral base formed by pressing a laminate formed by folding a cylindrical unit of knitted or looped fabric made of stainless steel fine wires and folding the thin plate, and an erected peripheral end erected from the base in an L shape in section. Thus, the resilient supporting member can effectively prevent the exhaust gas from entering into the air gap passage in the catalytic converter.
Inventors
- 👤 Ichizo Ohkata
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 19:26
CPC Classifications
F; F01; F01N; F01N3/00; F01N3/08; F01N3/10; F01N3/24; F01N3/28; F01N3/2839; F01N3/2853; F01N3/2867; F01N2350/00; F01N2350/02; F01N2350/04
Claims Analysis
Total Claims: 11
Claim 1
Independent Claim
90 words
A resilient supporting member for an exhaust gas catalytic converter, comprising: a thin plate of ceramic fiber, an edgewise peripheral base formed by pressing an annularly bent laminate formed by folding a cylindrical looped fabric unit formed from knitted metallic fine wires and winding said thin plate to form a port, and an erected peripheral end erected from said peripheral base having an L shaped cross section, said thin plate having a U shaped cross section and being open toward said peripheral base at the end of said peripheral end.
Claim 2
Dependent Claim
90 words
A resilient supporting member for an exhaust gas catalytic converter, comprising: a thin plate of ceramic fiber, an edgewise peripheral base formed by pressing an annularly bent laminate formed by folding a cylindrical looped fabric unit formed from knitted metallic fine wires and winding said thin plate to form a port, and an erected peripheral end erected from said peripheral base having an L shaped cross section, said thin plate having a U shaped cross section and being open toward said peripheral base at the end of said peripheral end.
Claim 3
Dependent Claim
106 words
The resilient supporting member according to claim 1, wherein said annularly bent laminate is formed by directing one end of the cylindrical looped fiber unit outwardly, folding the one end of the cylindrical unit a predetermined number of times to form a bent superposed part, inserting said thin plate into the inside of the bent superposed part of the cylindrical unit, outwardly folding the other end of the cylindrical looped fabric unit, further folding the other end of the cylindrical unit from the inside upper part onto the outside thereof outwardly and laminating the bent superposed part on the outside of the bent superposed part thereof.
Claim 4
Dependent Claim
66 words
The resilient supporting member according to claim 1, wherein said annularly bent laminate is so inserted into the holding cavity of a male press mold that said thin plate is disposed at the inner peripheral wall of the holding cavity at the outside and pressed by a projection protruding from the base of the male mold to the outer peripheral side of the holding cavity thereof.
Claim 5
Dependent Claim
70 words
A resilient supporting member for an exhaust gas catalytic converter, comprising: a thin plate of ceramic fiber; and a looped fabric unit of knitted metallic fine wires folded about said thin plate, the supporting member having a base and a leg section in an L-shaped cross section, with said thin plate forming a U-shape at the end of said leg section opposite said base and being open toward said base.
Claim 6
Dependent Claim
70 words
A resilient supporting member for an exhaust gas catalytic converter, comprising: a thin plate of ceramic fiber; and a looped fabric unit of knitted metallic fine wires folded about said thin plate, the supporting member having a base and a leg section in an L-shaped cross section, with said thin plate forming a U-shape at the end of said leg section opposite said base and being open toward said base.
Claim 7
Dependent Claim
17 words
A resilient supporting member as claimed in claim 4, wherein said metallic fine wires comprise stainless steel.
Claim 8
Dependent Claim
16 words
A resilient supporting member as claimed in claim 4, wherein said thin plate is gas impermeable.
Claim 9
Dependent Claim
94 words
A resilient supporting member as claimed in claim 4, produced by a method comprising the steps of: providing a knitted fabric of metallic fine wires; introducing a thin plate of ceramic fiber to said knitted fabric; folding said knitted fabric about said thin plate to form an annularly bent laminate; and forming said annularly bent laminate into the shape of an L having a base and a leg section, wherein said thin plate is formed into a U-shaped position in the end of said leg section opposite said base and opening towards said base.
Claim 10
Dependent Claim
45 words
A resilient supporting member as claimed in claim 7, wherein said forming step comprises placing said annularly bent laminate into a female mold and pressing said laminate in said female mold with a male mold comprising a projection for forming said laminate into said L-shape.
Claim 11
Dependent Claim
83 words
A catalytic converter unit comprising a catalytic converter, and at least two of said resilient supporting members as claimed in claim 4, wherein said supporting members are positioned at the end corners of said catalytic converter near the exhaust gas exit of the unit having said base section substantially perpendicular with the longitudinal axis of said unit and said leg section substantially parallel to said axis, said U-shaped thin plate being at the contacting edge of the supporting member with the exhaust gas.
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1987-04-24 | 1987-10-24 | 1988-04-24 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1991-04-24 | 1991-10-24 | 1992-04-24 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1995-04-24 | 1995-10-24 | 1996-04-24 | $7700.00 | Window Closed / Lapsed |