Patent US883147A successfully refreshed from Google Patents.
Patent US3716902A successfully refreshed from Google Patents.
US3716902A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method of making a composite welding torch tip
Assignee: Millennium Petrochemicals Inc
•
Filing: 1970-02-18
•
Granted: 1973-02-20
•
Expires: 1990-02-18
Abstract
Abstract Welding torch tips and cutting torch tips made from drawn copper tubing instead of conventional copper rod with its expensive drilled-out holes. A torch tip comprising an inner copper tube having a desired inner diameter, an outer copper tube drawn onto the inner tube and drawn to a desired outer diameter to form a combined tube, a nozzle formed on one end of the combined tube, and threads formed on the other end for attachment to a torch. The wall of the inner tube is thinner than the wall of the outside tube. If the torch tip is to be used for cutting, a plurality of radially spaced flutes are formed in the inner surface of the outer tube. If the torch tip is to be used for welding, the inner tube may be made of a lead-brass alloy that is resistant to wear of the welding wire passing therethrough. A method of making a torch tip comprising the steps of taking an inner seamless copper tube, drawing said inner tube to a desired inner and outer diameter, cutting said inner tube into sections and annealing them, drawing said inner sections to desired inner and outer diameter, taking an outer tube, drawing said outer tube to a desired outer and inner diameter, cutting said outer tube into sections and annealing them, inserting an inner tube section into an outer tube section, drawing the tube sections together into a combined tube section, trimming and straightening the combined tube sections, cutting the combined sections to tiplength units, swaging one end of each tip unit into a cone shape to form a nozzle, and threading the other end of each tip unit to adapt it for attachment to a torch. If the torch tip is to be used for cutting, the method includes the step of forming a plurality of inner flutes on the inner surface of the outer tube during the drawing operation before insertion therein of the inner tube.
Inventors
- 👤 H Pearce
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 22:33
CPC Classifications
B; B21; B21K; B21K21/00; B21K21/08; F; F23; F23D; F23D14/00; F23D14/46; F23D14/48; F23D14/52; F23D14/54; Y; Y10; Y10T; Y10T29/00; Y10T29/49; Y10T29/49348; Y10T29/49789; Y10T29/49798; Y10T29/49826; Y10T29/49908; Y10T29/49925; Y10T29/49927; Y10T29/49929; Y10T29/49934
Claims Analysis
Total Claims: 9
Claim 1
Independent Claim
124 words
In a method of making a cutting torch tip, the steps comprising drawing an inner metallic tube to desired initial outer and inner diameters with an outer contact surface adapted to contact the inner contact surface of an outer metallic tube, drawing an outer metallic tube to desired initial outer and inner diameters with an inner contact surface adapted to contact the outer contact surface of an inner metallic tube, drawing flutes into one of said contact surfaces, inserting the inner tube into the outer tube, and drawing the inner and outer tubes together to form a combined tube section having desired outer and inner diameters and drawing said flutes and the surface contacted thereby to form radially spaced passageways surrounding a central passageway.
Claim 2
Dependent Claim
124 words
In a method of making a cutting torch tip, the steps comprising drawing an inner metallic tube to desired initial outer and inner diameters with an outer contact surface adapted to contact the inner contact surface of an outer metallic tube, drawing an outer metallic tube to desired initial outer and inner diameters with an inner contact surface adapted to contact the outer contact surface of an inner metallic tube, drawing flutes into one of said contact surfaces, inserting the inner tube into the outer tube, and drawing the inner and outer tubes together to form a combined tube section having desired outer and inner diameters and drawing said flutes and the surface contacted thereby to form radially spaced passageways surrounding a central passageway.
Claim 3
Dependent Claim
124 words
In a method of making a cutting torch tip, the steps comprising drawing an inner metallic tube to desired initial outer and inner diameters with an outer contact surface adapted to contact the inner contact surface of an outer metallic tube, drawing an outer metallic tube to desired initial outer and inner diameters with an inner contact surface adapted to contact the outer contact surface of an inner metallic tube, drawing flutes into one of said contact surfaces, inserting the inner tube into the outer tube, and drawing the inner and outer tubes together to form a combined tube section having desired outer and inner diameters and drawing said flutes and the surface contacted thereby to form radially spaced passageways surrounding a central passageway.
Claim 4
Dependent Claim
124 words
In a method of making a cutting torch tip, the steps comprising drawing an inner metallic tube to desired initial outer and inner diameters with an outer contact surface adapted to contact the inner contact surface of an outer metallic tube, drawing an outer metallic tube to desired initial outer and inner diameters with an inner contact surface adapted to contact the outer contact surface of an inner metallic tube, drawing flutes into one of said contact surfaces, inserting the inner tube into the outer tube, and drawing the inner and outer tubes together to form a combined tube section having desired outer and inner diameters and drawing said flutes and the surface contacted thereby to form radially spaced passageways surrounding a central passageway.
Claim 5
Dependent Claim
19 words
The method of claim 1, wherein said flutes are drawn in the inner contact surface of said outer tube.
Claim 6
Independent Claim
193 words
A method of making a cutting torch tip, comprising the steps of taking an inner seamless copper tube from a reel, drawing said inner tube through a die to desired inner and outer diameters, cutting the drawn inner tube into sections for easier handling, annealing said inner tube sections, drawing said inner tube sections into desired inner and outer diameters, taking an outer seamless copper tube, drawing the outer tube to desired inner and outer diameters and drawing flutes in the inner surface of said outer tube, cutting the outer tube into sections for easier handling, annealing said outer tube sections, inserting an inner tube section into an outer tube section, drawing the inner and outer tube sections together to form a combined tube section having desired outer and inner diameters and wall thickness and radially spaced passageways, trimming and straightening the combined tube sections, cutting the combined tube sections into cutting torch tip units of a desired length, swaging one end of each tip unit into a cone-shape to form a nozzle, and cutting threads into the other end of each cutting-torch tip to adapt it for attachment to a cutting torch.
Claim 7
Independent Claim
193 words
A method of making a cutting torch tip, comprising the steps of taking an inner seamless copper tube from a reel, drawing said inner tube through a die to desired inner and outer diameters, cutting the drawn inner tube into sections for easier handling, annealing said inner tube sections, drawing said inner tube sections into desired inner and outer diameters, taking an outer seamless copper tube, drawing the outer tube to desired inner and outer diameters and drawing flutes in the inner surface of said outer tube, cutting the outer tube into sections for easier handling, annealing said outer tube sections, inserting an inner tube section into an outer tube section, drawing the inner and outer tube sections together to form a combined tube section having desired outer and inner diameters and wall thickness and radially spaced passageways, trimming and straightening the combined tube sections, cutting the combined tube sections into cutting torch tip units of a desired length, swaging one end of each tip unit into a cone-shape to form a nozzle, and cutting threads into the other end of each cutting-torch tip to adapt it for attachment to a cutting torch.
Claim 8
Dependent Claim
201 words
In a method of making a composite welding torch tip section having a smooth bore of very close tolerance which defines a central passageway so that during use of the welding torch tip contact is made with the welding wire substantially all along the central passageway, said method comprising the steps of drawing an outer copper tube to produce a permanent reduction in its outer and inner diameters to obtain desired initial outer and inner diameters and wall thickness, taking an inner tube of wear-resistant copper alloy having a substantially thinner wall thickness than said outer tube, drawing said inner tube to produce a permanent reduction in its outer and inner diameters to obtain desired initial outer and inner diameters, said drawn inner tube having a substantially thinner wall thickness than said drawn outer tube, assembling the drawn outer tube over the drawn inner tube, and drawing the assembled inner and outer tubes together simultaneously through a die sized to produce a permanent reduction in the outer diameter of the outer tube and in the inner diameter of the inner tube to form the composite welding torch tip section having a very close tolerance smooth bore with a desired inner diameter.
Claim 9
Dependent Claim
201 words
In a method of making a composite welding torch tip section having a smooth bore of very close tolerance which defines a central passageway so that during use of the welding torch tip contact is made with the welding wire substantially all along the central passageway, said method comprising the steps of drawing an outer copper tube to produce a permanent reduction in its outer and inner diameters to obtain desired initial outer and inner diameters and wall thickness, taking an inner tube of wear-resistant copper alloy having a substantially thinner wall thickness than said outer tube, drawing said inner tube to produce a permanent reduction in its outer and inner diameters to obtain desired initial outer and inner diameters, said drawn inner tube having a substantially thinner wall thickness than said drawn outer tube, assembling the drawn outer tube over the drawn inner tube, and drawing the assembled inner and outer tubes together simultaneously through a die sized to produce a permanent reduction in the outer diameter of the outer tube and in the inner diameter of the inner tube to form the composite welding torch tip section having a very close tolerance smooth bore with a desired inner diameter.
References Cited (Backward Citations)
US2243184A
Cited
US2468824A
Cited
US3104432A
Cited
US3267563A
Cited
US3444353A
Cited
US3431391A
Cited
US3523359A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1976-02-20 | 1976-08-21 | 1977-02-20 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-02-20 | 1980-08-21 | 1981-02-20 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-02-20 | 1984-08-21 | 1985-02-20 | $7700.00 | Window Closed / Lapsed |