US3602620A
Expired / Lapsed
US
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Thermal lances
Assignee: Individual
•
Filing: 1970-01-20
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Granted: 1971-08-31
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Expires: 1990-01-20
Abstract
Abstract The present invention has reference to a thermal lance or tool with a gas discharge end for working, in particular, boring, cutting and like treating hard base materials, said tool being comprised of a longitudinal core including a cable-shaped bunch of twisted wire elements and a tubular sheath of fusable material encasing said core in tight contact therewith. Between said elements and said sheath there exist inner spaces or interstices forming passageways for guiding therealong fuel, such as oxygen and like gas, toward said gas discharge end.
Inventors
- 👤 Edwin Eduard Fassler
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 07:49
CPC Classifications
E; E21; E21B; E21B7/00; E21B7/14; E21B7/146; Y; Y10; Y10T; Y10T29/00; Y10T29/49; Y10T29/49348; Y10T29/49826; Y10T29/49863; Y10T29/49865
Claims Analysis
Total Claims: 31
Claim 1
Independent Claim
94 words
Thermal lance or gas operated burner tool with a gas discharge end, for working, in particular, boring, cutting and like treating hard base materials in the form of concrete, rock, cast-iron and the like characterized by a longitudinal core comprising a cable-shaped bunch of twisted wire elements, and a tubular sheath of fusible material encasing said Core in tight contact therewith, inner spaces prevalent between said elements and said sheath forming passageways for guiding therealong fuel in the form of oxygen gas and the like when fed through said sheath toward its discharge end.
Claim 2
Dependent Claim
94 words
Thermal lance or gas operated burner tool with a gas discharge end, for working, in particular, boring, cutting and like treating hard base materials in the form of concrete, rock, cast-iron and the like characterized by a longitudinal core comprising a cable-shaped bunch of twisted wire elements, and a tubular sheath of fusible material encasing said Core in tight contact therewith, inner spaces prevalent between said elements and said sheath forming passageways for guiding therealong fuel in the form of oxygen gas and the like when fed through said sheath toward its discharge end.
Claim 3
Dependent Claim
44 words
A lance according to claim 1, wherein said core includes at least one single wire element extending along the longitudinal axis of said sheath, and at least one enclosure of circular-shaped formation composed of wires in convoluted form grouped around said single wire element.
Claim 4
Dependent Claim
28 words
A lance according to claim 2, wherein said core includes a conically shaped end portion of decreasing dimension facilitating tight fit of said core in said tubular sheath.
Claim 5
Dependent Claim
29 words
A thermal lance according to claim 1, in which the diameter of a number of wires forming the core differs from that of the wires twisted about said core.
Claim 6
Dependent Claim
29 words
A thermal lance according to claim 1, in which the sheath is of tubular configuration, into which a bunch of cable wires, all of the same length, is force-fitted.
Claim 7
Dependent Claim
20 words
A thermal lance according to claim 1, in which said sheath is shrunken onto the cable wires forming said core.
Claim 8
Dependent Claim
20 words
A thermal lance according to claim 1, in which said sheath is drawn onto the cable wires and press-fitted thereon.
Claim 9
Dependent Claim
40 words
A thermal lance according to claim 1, in which the sheath constitutes a sheet of metal by which the cable of wire elements is encased and which has its longitudinal edges welded together to transform it into a covering tube.
Claim 10
Dependent Claim
47 words
A thermal lance according to claim 1, in which the sheath is a tube into the surface of which one or more helical ridges are forced, which constrict the inner cross section of the tube to ensure that the cable of wire elements is firmly encased thereby.
Claim 11
Dependent Claim
49 words
A thermal lance according to claim 1, in which the sheath consists of a predetermined length of strip material wound helically about the core of a cable of wire elements, the edges of the turns of the strip material being joined together by welding to provide a gastight envelope.
Claim 12
Dependent Claim
115 words
A thermal lance for boring hard materials, which has a fusible sheath containing a core that burns away together with the sheath by means of a stream of oxygen passing through the latter; characterized by the fact that the core, which consists of at least one tubular member and extends in substantially the same axial direction as the sheath, has at least one profiled surface extending lengthwise of the axis of the sheath, so that passages to conduct the flow of oxygen are formed and bounded by the profiled surface, said core firmly contacting the inner surface of the sheath in intermittent relation and parallel to the common axis of said sheath and said core.
Claim 13
Dependent Claim
115 words
A thermal lance for boring hard materials, which has a fusible sheath containing a core that burns away together with the sheath by means of a stream of oxygen passing through the latter; characterized by the fact that the core, which consists of at least one tubular member and extends in substantially the same axial direction as the sheath, has at least one profiled surface extending lengthwise of the axis of the sheath, so that passages to conduct the flow of oxygen are formed and bounded by the profiled surface, said core firmly contacting the inner surface of the sheath in intermittent relation and parallel to the common axis of said sheath and said core.
Claim 14
Dependent Claim
19 words
A thermal lance according to claim 11, in which the inner surface of the sheath is plain and smooth.
Claim 15
Dependent Claim
17 words
A thermal lance according to claim 11, in which the inner surface of the sheath is profiled.
Claim 16
Dependent Claim
40 words
A thermal lance according to claim 11, in which the outer surface of the core is profiled and the inner surface of the sheath is conformed to the profiled surface of said core and shaped for contact with the latter.
Claim 17
Dependent Claim
25 words
A thermal lance according to claim 11, in which the core is tubular in shape and forms a passage for the flow of oxygen therein.
Claim 18
Dependent Claim
33 words
A thermal lance according to claim 15, in which the inner face of the tubular core is profiled, while its outer surface is in contact with said sheath presenting a profiled inner surface.
Claim 19
Dependent Claim
34 words
A thermal lance according to claim 11, in which concentric tubular members form the core which has an inner face profiled and in contact with another core member so as to form gas passages.
Claim 20
Dependent Claim
20 words
A thermal lance according to claim 11, in which the sheath forms a tube defined by a plain inner surface.
Claim 21
Dependent Claim
25 words
A thermal lance according to claim 11, in which the sheath forms a profiled tube provided with tooth-shaped projecting ribs distributed along its inner surface.
Claim 22
Dependent Claim
42 words
A thermal lance according to claim 11, in which the core is constituted by a tubulaR profiled rod tooth-shaped in cross section and inserted into a profiled tubular sheath having an inner surface provided with tooth-shaped projections conformed to the profiled rod.
Claim 23
Dependent Claim
39 words
A thermal lance according to claim 11, in which the core is constituted by a solid profiled rod with a cross section made up of radiating tongues, so that the ''''tooth'''' depth is markedly greater than the ''''tooth'''' width.
Claim 24
Dependent Claim
60 words
A thermal lance according to claim 11, in which said core is provided with an outer core of tube configuration plain at the outside surface and profiled at the inside surface, which is inserted into a correspondingly profiled tubular sheath of larger diameter, and a rod forming an inner core, which is inserted into said outer core of tube configuration.
Claim 25
Dependent Claim
30 words
A thermal lance according to claim 11, in which the sheath is a tube profiled therewithin and containing a core coextensive in length, said core being force-fitted into said sheath.
Claim 26
Dependent Claim
36 words
A thermal lance according to claim 11, in which the sheath is constituted by a sheet of metal fitted around said core to form a tube having abutting side edges welded together along the side edges.
Claim 27
Dependent Claim
28 words
A thermal lance according to claim 11, in which the sheath constitutes a strip of metal wound helically onto said core, its turns being joined together by welding.
Claim 28
Dependent Claim
31 words
A thermal lance according to claim 11, in which at least one of the core faces extending along the core is profiled symmetrically about the longitudinal center line of the core.
Claim 29
Dependent Claim
30 words
A thermal lance according to claim 11, in which said core consists of one or more parts extending in the same axial direction as said sheath and is coaxial therewith.
Claim 30
Dependent Claim
37 words
A thermal lance according to claim 11, in which said core comprises several parts and extending in the same axial direction as said sheath, so that said core and said sheath are directed parallel to one another.
Claim 31
Dependent Claim
28 words
A thermal lance according to claim 11, wherein said core is firmly anchored in its sheath, the latter being constricted in intervals along the entire length by pressing.
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) | 1974-08-30 | 1975-03-01 | 1975-08-31 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-08-30 | 1979-03-01 | 1979-08-31 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-08-30 | 1983-03-01 | 1983-08-31 | $7700.00 | Window Closed / Lapsed |