Patent US2325443A successfully refreshed from Google Patents.
US4069407A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Underwater cutting rod
Assignee: Individual
•
Filing: 1975-12-10
•
Granted: 1978-01-17
•
Expires: 1995-12-10
Abstract
Abstract Applicant's invention relates to a new and novel concept in underwater cutting of metals and nonmetals. It utilizes a binary metallic system in conjunction with an ionized gaseous cone to provide a continuous cutting action of high temperature, extreme power, and with great intensity.
Inventors
- 👤 Jerome S. Brower
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 21:53
CPC Classifications
E; E21; E21B; E21B7/00; E21B7/14; E21B7/15; B; B23; B23K; B23K35/00; B23K35/02; B23K35/0211; B23K35/0216; B23K7/00; B23K7/08; E21B7/143; E21B7/146
Claims Analysis
Total Claims: 7
Claim 1
Independent Claim
114 words
A cutting torch primarily for underwater use in which electrical current and reactive gas flow are used in combination to cause progressive burning of a metallic electrode, the torch comprising a metallic electrode comprising a metallic tube; a plurality of ferrous metal rods within said tube; at least one rod made of a metal selected from the group consisting of aluminum, magnesium, titanium and alloys thereof disposed within said tube; and a layer of insulating material substantially covering the exterior surface of said tube; means for connecting a source of electrical current to said tube and for supplying current substantially continuously thereto; and means for connecting a supply of reactive gas to said tube.
Claim 2
Dependent Claim
114 words
A cutting torch primarily for underwater use in which electrical current and reactive gas flow are used in combination to cause progressive burning of a metallic electrode, the torch comprising a metallic electrode comprising a metallic tube; a plurality of ferrous metal rods within said tube; at least one rod made of a metal selected from the group consisting of aluminum, magnesium, titanium and alloys thereof disposed within said tube; and a layer of insulating material substantially covering the exterior surface of said tube; means for connecting a source of electrical current to said tube and for supplying current substantially continuously thereto; and means for connecting a supply of reactive gas to said tube.
Claim 3
Dependent Claim
26 words
A torch according to claim 1 wherein the ratio of steel rods to aluminum rods is between about 3 to 1 and about 10 to 1.
Claim 4
Dependent Claim
19 words
A torch according to claim 1 wherein the ratio of steel rods to aluminum rods is 7 to 1.
Claim 5
Dependent Claim
19 words
The device of claim 1 where the tube is crimped at each end to hold the rods disposed within.
Claim 6
Dependent Claim
23 words
The device of claim 1 wherein the gas supplied is oxygen at a pressure of from about 55 psig to about 200 psig.
Claim 7
Dependent Claim
22 words
The device of claim 1 wherein the electrical current supplied is in the range of from about 30 to about 600 amperes.
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) | 1981-01-16 | 1981-07-18 | 1982-01-17 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1985-01-16 | 1985-07-18 | 1986-01-17 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1989-01-16 | 1989-07-18 | 1990-01-17 | $7700.00 | Window Closed / Lapsed |