Patent US4538984A successfully refreshed from Google Patents.
US4538984A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Handy torch
Assignee: Sankin Industry Co Ltd
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Filing: 1984-02-16
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Granted: 1985-09-03
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Expires: 2004-02-16
Abstract
Abstract A butane gas type handy torch has a burner, an ignition unit for igniting a gas mixture from the burner, and a main control lever movable within a range including a gas close position, a gas open position and an ignition position for controlling gas flow from the tank and actuating a generating portion of the ignition unit by moving only the main control lever. The burner is tiltable.
Inventors
- 👤 Katsuyuki Nakagawa
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 10:27
CPC Classifications
B; B23; B23K; B23K3/00; B23K3/02; B23K3/021; B23K3/023; F; F23; F23D; F23D14/00; F23D14/28
Claims Analysis
Total Claims: 9
Claim 1
Independent Claim
156 words
A handy torch for operation with a tank containing a fuel gas, the tank having a valve providing open and closed positions, said handy torch comprising: a frame member for holding the tank; a burner pivotally mounted on said frame member and including a nozzle and a mixing valve for mixing the fuel gas with air; a conduit connecting said mixing valve with the tank valve; an igniter having an electrode, positioned close to said nozzle, and an actuator; a manually operative main control level pivotally mounted on said frame for movement between gas open, gas closed and ignition positions, said actuator being positioned to engage said main control lever only in said ignition position and said main control lever being operatively connected to the tank valve for movement of the valve between the open and close positions so that, by a single movement of main control lever, gas is released from the tank and ignited.
Claim 2
Dependent Claim
156 words
A handy torch for operation with a tank containing a fuel gas, the tank having a valve providing open and closed positions, said handy torch comprising: a frame member for holding the tank; a burner pivotally mounted on said frame member and including a nozzle and a mixing valve for mixing the fuel gas with air; a conduit connecting said mixing valve with the tank valve; an igniter having an electrode, positioned close to said nozzle, and an actuator; a manually operative main control level pivotally mounted on said frame for movement between gas open, gas closed and ignition positions, said actuator being positioned to engage said main control lever only in said ignition position and said main control lever being operatively connected to the tank valve for movement of the valve between the open and close positions so that, by a single movement of main control lever, gas is released from the tank and ignited.
Claim 3
Dependent Claim
33 words
The handy torch of claim 1 further comprising a tiltable bracket holding said burner and a fixed bracket mounted on said frame member, said tiltable bracket being pivotally mounted on said fixed bracket.
Claim 4
Dependent Claim
34 words
The handy torch of claim 2 wherein said tiltable and fixed brackets are separated by a tiltable spring and are pinned together through said spring, said spring biasing said tiltable bracket in one direction.
Claim 5
Dependent Claim
43 words
The handy torch of claim 1 further comprising a stop member resiliently biased against said main control lever and wherein said main control lever has at least two notches, corresponding to said gas open and gas closed positions, for receiving said stop member.
Claim 6
Dependent Claim
19 words
The handy torch of claim 1 wherein said gas open position is intermediate said gas closed and ignition positions.
Claim 7
Dependent Claim
20 words
The handy torch of claim 1 further comprising means for resiliently biasing said tank valve toward the gas closed position.
Claim 8
Dependent Claim
13 words
The handy torch of claim 1 wherein said igniter is a piezo-electric igniter.
Claim 9
Dependent Claim
19 words
The handy torch of claim 4 wherein said gas open position is intermediate said gas closed and ignition positions.
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) | 1988-09-02 | 1989-03-04 | 1989-09-03 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1992-09-02 | 1993-03-04 | 1993-09-03 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1996-09-02 | 1997-03-04 | 1997-09-03 | $7700.00 | Window Closed / Lapsed |