US3576423A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Arc welding gun
Assignee: Delaware Capital Formation Inc
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Filing: 1969-06-05
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Granted: 1971-04-27
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Expires: 1989-06-05
Abstract
Abstract A high current capacity arc welding gun for gas-shielded, continuous feed, consumable electrode arc welding processes. Features include: a unique handle cooled by convection air flow; an improved head assembly having a unique electrical insulating ion impervious shield for preventing destructive arcing to the gas nozzle, an improved shielding gas flow path through the head assembly which additionally cooperates with the ion impervious shield to prevent gas nozzle arcing, a unique current contact top which attaches to the head assembly by a novel curved wedge clamping concept and which is produced by an improved, versatile, and inexpensive method of manufacture that increases the copper density and refines the grain structure in the current contact tip for greater life; an improved gooseneck lining for longer life and reduced friction; a heat protected control switch assembly of rugged construction and unique trigger operation; and an improved welding cable connection assembly.
Inventors
- 👤 Arthur A Bernard
- 👤 Richard A Bernard
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 20:03
CPC Classifications
B; B23; B23K; B23K9/00; B23K9/12; B23K9/122; B23K9/123
Claims Analysis
Total Claims: 7
Claim 1
Independent Claim
160 words
In an arc welding gun for applying continuous-feed, consumable-electrode arc welding processes and which has a head member at its arc end with a bore receiving a current contact member, and a radial adjustable element projecting radially into the head member bore wherein the improvement comprises: said current contact member being a tubular electrically conductive current contact member having at least one annularly-oriented recessed channel in said current contact member periphery and a longitudinally-oriented land in the periphery of said current contact member extending from the deepest portion of said recessed channel to one end of said current contact member to enable registration of said projecting element with said recessed channel when said current contact member is inserted into said head member bore, said recessed channel having for its base surface an annularly-oriented eccentric curved-wedge cam surface engaging and wedging radially against said projecting element when said current contact member is compatibly positioned and rotated within said head member bore.
Claim 2
Dependent Claim
160 words
In an arc welding gun for applying continuous-feed, consumable-electrode arc welding processes and which has a head member at its arc end with a bore receiving a current contact member, and a radial adjustable element projecting radially into the head member bore wherein the improvement comprises: said current contact member being a tubular electrically conductive current contact member having at least one annularly-oriented recessed channel in said current contact member periphery and a longitudinally-oriented land in the periphery of said current contact member extending from the deepest portion of said recessed channel to one end of said current contact member to enable registration of said projecting element with said recessed channel when said current contact member is inserted into said head member bore, said recessed channel having for its base surface an annularly-oriented eccentric curved-wedge cam surface engaging and wedging radially against said projecting element when said current contact member is compatibly positioned and rotated within said head member bore.
Claim 3
Dependent Claim
40 words
The improvement defined in claim 1 wherein said tubular current contact member has a pair of diametrically-opposed flat spots in its periphery to facilitate gripping said current contact member to rotate said current contact member within said head member bore.
Claim 4
Dependent Claim
206 words
In an arc welding gun for applying continuous-feed, consumable-electrode arc welding processes and which has a head member at its arc eNd with a bore receiving a current contact member, and an element projecting radially into the head member bore, wherein the improvement comprises: said current contact member being a tubular electrically conductive current contact member having a pair of annularly-oriented recessed channels disposed in diametrically opposite relationship in said current contact member periphery and a pair of longitudinally-oriented lands disposed in diametrically opposite relationship in the periphery of said current contact member, each of said lands extending from the deepest portion of an associated one of said pair of recessed channels to one end of said current contact member to permit registration of said projecting element selectively with said associated recessed channel when said current contact member is inserted into said head member bore, each of said recessed channels having for its base surface an annularly-oriented eccentric curved-wedge cam surface engaging and wedging radially against said projecting element when said current contact member is compatibly positioned and rotated within said head member bore thereby enabling said current contact member to be selectively wedged within said head member bore in either of two 180* rotated orientations.
Claim 5
Dependent Claim
206 words
In an arc welding gun for applying continuous-feed, consumable-electrode arc welding processes and which has a head member at its arc eNd with a bore receiving a current contact member, and an element projecting radially into the head member bore, wherein the improvement comprises: said current contact member being a tubular electrically conductive current contact member having a pair of annularly-oriented recessed channels disposed in diametrically opposite relationship in said current contact member periphery and a pair of longitudinally-oriented lands disposed in diametrically opposite relationship in the periphery of said current contact member, each of said lands extending from the deepest portion of an associated one of said pair of recessed channels to one end of said current contact member to permit registration of said projecting element selectively with said associated recessed channel when said current contact member is inserted into said head member bore, each of said recessed channels having for its base surface an annularly-oriented eccentric curved-wedge cam surface engaging and wedging radially against said projecting element when said current contact member is compatibly positioned and rotated within said head member bore thereby enabling said current contact member to be selectively wedged within said head member bore in either of two 180* rotated orientations.
Claim 6
Dependent Claim
166 words
In an arc welding gun for applying continuous-feed, consumable-electrode arc welding processes and which has a head member at its arc end with a bore receiving a current contact member, and an adjustable set screw projecting radially into said head member bore, the improvement comprising: said current contact member being a tubular electrically conductive current contact member having at least one annularly-oriented eccentric curved-wedge cam surface in its periphery engaging and wedging radially against said set screw when said current contact member is compatibly positioned and rotated within said head member bore, and a step in said head member bore forwardly of said set screw enlarging the diameter of said head member bore for the portion of its length in which said cam surface coacts with said set screw leaving the periphery of said current contact member diametrically opposite the point of coaction of said projecting element unsupported to permit slight flexing of said current contact member when cam surface is wedged against said set screw.
Claim 7
Dependent Claim
166 words
In an arc welding gun for applying continuous-feed, consumable-electrode arc welding processes and which has a head member at its arc end with a bore receiving a current contact member, and an adjustable set screw projecting radially into said head member bore, the improvement comprising: said current contact member being a tubular electrically conductive current contact member having at least one annularly-oriented eccentric curved-wedge cam surface in its periphery engaging and wedging radially against said set screw when said current contact member is compatibly positioned and rotated within said head member bore, and a step in said head member bore forwardly of said set screw enlarging the diameter of said head member bore for the portion of its length in which said cam surface coacts with said set screw leaving the periphery of said current contact member diametrically opposite the point of coaction of said projecting element unsupported to permit slight flexing of said current contact member when cam surface is wedged against said set screw.
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1974-04-26 | 1974-10-26 | 1975-04-27 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-04-26 | 1978-10-26 | 1979-04-27 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-04-26 | 1982-10-26 | 1983-04-27 | $7700.00 | Window Closed / Lapsed |