Patent US4641632A successfully refreshed from Google Patents.
US4641632A
Expired / Lapsed
US
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Heating iron using liquefied gas
Assignee: Nakajima Dokosho Co Ltd
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Filing: 1985-07-25
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Granted: 1987-02-10
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Expires: 2005-07-25
Abstract
Abstract A heating iron utilizing the heat obtained through complete catalytic combustion of liquefied gas comprises a catalyst combustion chamber having an inner gas flow channel confined therein and in direct connection with a gas mixture generating means and a pre-heating zone disposed to the outer circumferential surface of the catalyst combustion chamber, in which the pre-heating zone is heated upon start of the catalytic combustion to heat the catalyst layer in the catalyst combustion chamber to a temperature sufficient for starting the catalytic oxidizing reaction in a flameless manner.
Inventors
- 👤 Masahiko Nakajima
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 14:46
CPC Classifications
B; B23; B23K; B23K3/00; B23K3/02; B23K3/021; B23K3/022; F; F23; F23D; F23D14/00; F23D14/12; F23D14/18
Claims Analysis
Total Claims: 6
Claim 1
Independent Claim
122 words
An iron for heating a workpiece comprising: a nozzle for jetting out a combustible gas from a liquefied gas reservoir; a gas mixture generating means at the exit of said nozzle for drawing air to mix with said combustible gas to form a mixture; a catalyst combustion chamber downstream of said generating means having a gas flow channel extending therethrough with a catalyst layer deposited on the channel wall and a portion of the channel wall forming a pre-heating zone; means for directly and flamelessly heating the outer side of said chamber to heat said pre-heating zone to ignite said mixture; and a tip member at least partially surrounding the catalyst chamber for conducting the heat from said chamber to a workpiece.
Claim 2
Dependent Claim
122 words
An iron for heating a workpiece comprising: a nozzle for jetting out a combustible gas from a liquefied gas reservoir; a gas mixture generating means at the exit of said nozzle for drawing air to mix with said combustible gas to form a mixture; a catalyst combustion chamber downstream of said generating means having a gas flow channel extending therethrough with a catalyst layer deposited on the channel wall and a portion of the channel wall forming a pre-heating zone; means for directly and flamelessly heating the outer side of said chamber to heat said pre-heating zone to ignite said mixture; and a tip member at least partially surrounding the catalyst chamber for conducting the heat from said chamber to a workpiece.
Claim 3
Dependent Claim
25 words
The heating iron as defined in claim 1, wherein at least one of the catalyst chamber and the iron tip is made detachable and replaceable.
Claim 4
Dependent Claim
25 words
The heating iron as defined in claim 1, wherein a plurality of combustion exhaust openings are perforated through the circumferential surface of the iron tip.
Claim 5
Dependent Claim
39 words
The heating iron as defined in claim 1, wherein a combustion exhaust opening for discharging the combustion exhaust as a hot blow is disposed to the top end of the iron tip to thereby constitute a non-contact type iron.
Claim 6
Dependent Claim
69 words
The heating iron as defined in claim 1 wherein the catalyst combustion chamber comprises a tubular catalyst support chosen from the group consisting of porous mullite ceramics (3Al 2 O 3 .2SiO 2 ) and alumina ceramics (Al 2 O 3 ) and the catalyst layer deposited on said catalyst support comprises from 90 to 98% by weight of platinum and from 2 to 10% by weight of rhodium.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1990-02-09 | 1990-08-11 | 1991-02-10 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1994-02-09 | 1994-08-11 | 1995-02-10 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1998-02-09 | 1998-08-11 | 1999-02-10 | $7700.00 | Window Closed / Lapsed |