US5087278A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Filter for gas lighter and method for producing the same
Assignee: YAKA FEUDOR KK
•
Filing: 1991-07-09
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Granted: 1992-02-11
•
Expires: 2011-07-09
Abstract
Abstract Forming a filter for a gas lighter using a sintered porous ceramic, and adjusting the flow rate of gas through gas passages formed by interparticle pores of ceramic. There will be no change in the flame length even in the use of the gas lighter over a long period, thereby enhancing the safety of the gas lighter.
Inventors
- 👤 Toshiyuki Suzuki
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-06 13:21
CPC Classifications
B; B01; B01D; B01D39/00; B01D39/14; B01D39/20; B01D39/2068; B01D39/2072; B01D39/2075; C; C04; C04B; C04B38/00; F; F23; F23Q; F23Q2/00; F23Q2/16; F23Q2/162; F23Q2/163
Claims Analysis
Total Claims: 40
Claim 1
Independent Claim
24 words
A filter for a gas lighter, constituted by a sintered porous ceramic having interparticle pores, wherein the particles of the porous ceramic are spherical.
Claim 2
Dependent Claim
24 words
A filter for a gas lighter, constituted by a sintered porous ceramic having interparticle pores, wherein the particles of the porous ceramic are spherical.
Claim 3
Dependent Claim
30 words
A filter for a gas lighter according to claim 1, wherein the interparticle pores of said sintered porous ceramic are in the range of 0.1 to 2.0 μm in diameter.
Claim 4
Dependent Claim
22 words
A filter for a gas lighter according to claim 1, wherein said sintered porous ceramic is a sintered alumina, silica or alumina-silica.
Claim 5
Dependent Claim
21 words
A filter as claimed in claim 1, wherein the pore diameter is in the range of about 0.3 to 1.5 micrometers.
Claim 6
Dependent Claim
28 words
A filter as claimed in claim 1, wherein the ceramic is selected from the group consisting of alumina, silica, alumina-silica, magnesia, spinel, carbon, silicon carbide and silicon nitride.
Claim 7
Independent Claim
63 words
A method for producing a filter for a gas lighter, which method comprises adding a binder to a ceramic powder of spherical particles containing not less than 80% by weight of particles which are in the range of 0.5 to 10 μm in diameter, granulating the resulting mixture to obtain secondary particles, then molding the resulting secondary particles, and calcining the molded product.
Claim 8
Independent Claim
63 words
A method for producing a filter for a gas lighter, which method comprises adding a binder to a ceramic powder of spherical particles containing not less than 80% by weight of particles which are in the range of 0.5 to 10 μm in diameter, granulating the resulting mixture to obtain secondary particles, then molding the resulting secondary particles, and calcining the molded product.
Claim 9
Dependent Claim
21 words
A method according to claim 6, wherein the ceramic powder comprises one or more selected from alumina, silica and alumina-silica powders.
Claim 10
Dependent Claim
20 words
A method according to claim 7, wherein the calcining temperature is in the range of 1,000° C. to 1,500° C.
Claim 11
Dependent Claim
31 words
A method for producing a filter as claimed in claim 6, wherein at least 80% of the spherical particles have a diameter in the range of about 2 to 8 micrometers.
Claim 12
Dependent Claim
33 words
A method for producing a filter as claimed in claim 6, wherein the particles have a major to minor axis ratio in the range of about 1.3 to 1.0 as a sphering rate.
Claim 13
Dependent Claim
44 words
A method for producing a filter as claimed in claim 6, wherein the binder is one or more of the binders selected from the group consisting of clay, water glass, phosphates, silicates, frit, cements, PVA, phenolic resins, furan resins, epoxy resins, and wax emulsion.
Claim 14
Dependent Claim
30 words
A method for producing a filter according to claim 6, wherein the binder is added in an amount of about 0.05 to 10 weight percent based on the ceramic powder.
Claim 15
Dependent Claim
26 words
A method for producing a filter according to claim 6, wherein the secondary particles have a diameter in the range of about 10 to 500 micrometers.
Claim 16
Dependent Claim
28 words
A method for producing a filter according to claim 6, wherein the secondary particles are molded at a pressure of about the 500 to 1500 kg/cm 2 .
Claim 17
Dependent Claim
25 words
A method for producing a filter according to claim 6, wherein the calcining temperature is in the range of about 1000° C. to 1500° C.
Claim 18
Independent Claim
57 words
A method for producing a filter for a gas lighter, which method comprises passing a fine fireproof powder of a metal oxide through a high-temperature atmosphere to melt and sphere the powder, adding an appropriate amount of a binder to the resulting spherical particles of the powder, molding the resulting mixture, and thereafter calcining the molded product.
Claim 19
Independent Claim
57 words
A method for producing a filter for a gas lighter, which method comprises passing a fine fireproof powder of a metal oxide through a high-temperature atmosphere to melt and sphere the powder, adding an appropriate amount of a binder to the resulting spherical particles of the powder, molding the resulting mixture, and thereafter calcining the molded product.
Claim 20
Dependent Claim
40 words
A method for producing a filter as claimed in claim 16, wherein the fine fireproof powder of a metal oxide is selected from the group consisting of alumina, silica, alumina-silica, magnesia, cordierite, spinel, zirconia, titania, calcium titanate, and calcium zirconate.
Claim 21
Dependent Claim
38 words
A method for producing a filter as claimed in claim 16, wherein after sphering, the fine fireproof powder particles have a major to minor axis ratio in the range of about 1.3 to 1.0 as a sphering rate.
Claim 22
Dependent Claim
26 words
A method for producing a filter as claimed in claim 16, wherein the particle diameter of the fine fireproof powder is not larger than 300 micrometers.
Claim 23
Dependent Claim
26 words
A method for producing a filter as claimed in claim 16, wherein the particle diameter of the fine fireproof powder is not larger than 100 micrometers.
Claim 24
Dependent Claim
39 words
A method for producing a filter as claimed in claim 16, wherein the binder is selected from the group consisting of clay, bentonite, water glass, phosphates, silicates, frit, cements, PVA, phenolic resins, furan resins, epoxy resins, and wax emulsion.
Claim 25
Dependent Claim
29 words
A method for producing a filter according to claim 16, wherein the binder is added in an amount of about 0.05 to 10 weight percent based on the powder.
Claim 26
Dependent Claim
29 words
A method for producing a filter according to claim 16, wherein the particles in the molding step have a diameter in the range of about 10 to 500 micrometers.
Claim 27
Dependent Claim
27 words
A method for producing a filter according to claim 16, wherein the molding step takes place at a pressure of about 500 to 1500 kg/cm 2 .
Claim 28
Dependent Claim
25 words
A method for producing a filter according to claim 16, wherein the calcining temperature is in the range of about 1000° C. to 1500° C.
Claim 29
Dependent Claim
27 words
A method for producing a filter according to claim 16, wherein the calcined product has a pore diameter in the range of about 0.1 to 2.0 microns.
Claim 30
Dependent Claim
27 words
A method for producing a filter according to claim 16, wherein the calcined product has a pore diameter in the range of about 0.3 to 1.5 microns.
Claim 31
Dependent Claim
26 words
A method for producing a filter according to claim 16, wherein the high temperature atmosphere is in the range of about 2000° C. to 2200° C.
Claim 32
Dependent Claim
34 words
A filter for a gas lighter, having a cylindrical body formed of a porous ceramic having gas permeability, at least the underside of said cylindrical body being coated with a porous fluorine resin film.
Claim 33
Dependent Claim
34 words
A filter for a gas lighter, having a cylindrical body formed of a porous ceramic having gas permeability, at least the underside of said cylindrical body being coated with a porous fluorine resin film.
Claim 34
Dependent Claim
31 words
A filter for a gas lighter according to claim 29, wherein both the underside and the peripheral side face of said cylindrical body are coated with said porous fluorine resin film.
Claim 35
Independent Claim
44 words
A method for producing a filter for a gas lighter, which method comprises coating at least the underside of a cylindrical body formed of a porous ceramic having gas permeability with a dispersion of a fluorine resin, and thereafter heating the thus-coated cylindrical body.
Claim 36
Independent Claim
44 words
A method for producing a filter for a gas lighter, which method comprises coating at least the underside of a cylindrical body formed of a porous ceramic having gas permeability with a dispersion of a fluorine resin, and thereafter heating the thus-coated cylindrical body.
Claim 37
Dependent Claim
28 words
A method for producing a filter according to claim 31, wherein the temperature during the heating step is in the range of about 200° C. to 500° C.
Claim 38
Dependent Claim
24 words
A method for producing a filter according to claim 31, wherein the temperature during the heating step is about 200° C. to 420° C.
Claim 39
Dependent Claim
28 words
A method for producing a filter according to claim 31, wherein the fluorine resin is selected from the group consisting of polyvinyl fluoride, polyvinylidene fluoride, polytrifluoroethylene, and polytetrafluoroethylene.
Claim 40
Dependent Claim
29 words
A method for producing a filter according to claim 31, wherein the thickness of the fluorine resin after heating is in the range of about 5 to 100 micrometers.
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
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| 3.5 Years (Year 4) | 1995-02-10 | 1995-08-12 | 1996-02-11 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1999-02-10 | 1999-08-12 | 2000-02-11 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2003-02-10 | 2003-08-12 | 2004-02-11 | $7700.00 | Window Closed / Lapsed |