US3741135A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Cutting torch
Assignee: Individual
•
Filing: 1971-09-15
•
Granted: 1973-06-26
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Expires: 1991-09-15
Abstract
Abstract A method for cutting metal is disclosed in which a fuel and an oxidizer are burned within a combustion chamber at higher than ambient pressures to produce a gas stream comprising an oxidizerrich core surrounded by a fuel-rich sheath. This gas stream is caused to impinge upon a body of metal to be cut at approximately sonic velocities by passing the gas stream through a choked nozzle arranged with respect to the combustion chamber so that the oxidizer-fuel orientation in the gas stream is maintained. Portable hand-held apparatus for generating the cutting gas stream are disclosed which employ a solid fuel material and a solid oxygen generating material to produce a portable selfcontained unit.
Inventors
- 👤 Aircraft Corp United
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 23:00
CPC Classifications
F; F23; F23D; F23D99/00
Claims Analysis
Total Claims: 7
Claim 1
Independent Claim
96 words
A portable cutting torch comprising: a. an expendable cartridge, said cartridge comprising a pressure vessel being provided with a nozzle at the forward end for emitting a stream of high temperature gases and self-sustaining means for generating pressurized high temperature gases within said combustion chamber; and b. reusable handle means, said handle means comprising a sleeve member receiving substantially all of said cartridge with said nozzle means extending from the forward end of said sleeve, and c. spacing means for maintaining a substantial portion of said cartridge means within said sleeve means in spaced-apart relationship therefrom.
Claim 2
Dependent Claim
96 words
A portable cutting torch comprising: a. an expendable cartridge, said cartridge comprising a pressure vessel being provided with a nozzle at the forward end for emitting a stream of high temperature gases and self-sustaining means for generating pressurized high temperature gases within said combustion chamber; and b. reusable handle means, said handle means comprising a sleeve member receiving substantially all of said cartridge with said nozzle means extending from the forward end of said sleeve, and c. spacing means for maintaining a substantial portion of said cartridge means within said sleeve means in spaced-apart relationship therefrom.
Claim 3
Dependent Claim
17 words
The combination of claim 1 further comprising means for releasably maintaining said cartridge within said sleeve means.
Claim 4
Dependent Claim
50 words
The combination of claim 2 further comprising pressure relief means disposed on the rearward end of said cartridge and flow directing means for directing gases emitted from said pressure relief valve through the space between said cartridge and said sleeve means and out the forward end of said sleeve means.
Claim 5
Dependent Claim
17 words
The combination of claim 2 further comprising grasping means affixed to and depending from said sleeve means.
Claim 6
Dependent Claim
50 words
The combination of claim 1 further comprising pressure relief means disposed on the rearward end of said cartridge and flow directing means for directing gases emitted from said pressure relief valve through the space between said cartridge and said sleeve means and out the forward end of said sleeve means.
Claim 7
Dependent Claim
17 words
The combination of claim 1 further comprising grasping means affixed to and depending from said sleeve means.
References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1976-06-25 | 1976-12-25 | 1977-06-26 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-06-25 | 1980-12-25 | 1981-06-26 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-06-25 | 1984-12-25 | 1985-06-26 | $7700.00 | Window Closed / Lapsed |