Patent US3736401A successfully refreshed from Google Patents.
US3736401A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Through deck welding
Assignee: Northrop Grumman Space and Mission Systems Corp
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Filing: 1970-07-09
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Granted: 1973-05-29
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Expires: 1990-07-09
Abstract
Abstract This invention is directed at a drawn-arc welding gun with means for providing a rotary flow of air, or stream of fluid, around the weld area. This invention is also directed at ferrules which are designed to enhance movement of air or fluid around the weld area.
Inventors
- 👤 T Shoup
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-09 22:00
CPC Classifications
B; B23; B23K; B23K9/00; B23K9/20; B23K9/201; B23K9/202
Claims Analysis
Total Claims: 4
Claim 1
Independent Claim
154 words
In a stud welding tool for welding a stud to a workpiece by a drawn arc, the tool comprising a chuck for holding a stud, means for retracting the chuck, means for supplying welding current to the chuck after movement of the chuck to the retracted position, and means for plunging the chuck forwardly toward the workpiece after a period of time in the retracted position and a ferrule holder assembly defining an area and including a foot having a hole formed therein, a plenum chamber into which the hole opens, and a series of inlet channels opening into the plenum chamber, and the ferrule holder assembly including aspiration channels which open into the area defined by the ferrule holder assembly and which open into the area exterior of the ferrule holder assembly at points on the periphery of the ferrule holDer assembly and each of the aspiration channels connected to an inlet channel.
Claim 2
Dependent Claim
154 words
In a stud welding tool for welding a stud to a workpiece by a drawn arc, the tool comprising a chuck for holding a stud, means for retracting the chuck, means for supplying welding current to the chuck after movement of the chuck to the retracted position, and means for plunging the chuck forwardly toward the workpiece after a period of time in the retracted position and a ferrule holder assembly defining an area and including a foot having a hole formed therein, a plenum chamber into which the hole opens, and a series of inlet channels opening into the plenum chamber, and the ferrule holder assembly including aspiration channels which open into the area defined by the ferrule holder assembly and which open into the area exterior of the ferrule holder assembly at points on the periphery of the ferrule holDer assembly and each of the aspiration channels connected to an inlet channel.
Claim 3
Dependent Claim
22 words
A stud welding tool as set forth in claim 1 wherein the aspiration channels are of larger diameter than the inlet channels.
Claim 4
Dependent Claim
26 words
A stud welding tool as set forth in claim 2 wherein the aspiration channels are in angular relation to the axis of the ferrule holder assembly.
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) | 1976-05-28 | 1976-11-27 | 1977-05-29 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-05-28 | 1980-11-27 | 1981-05-29 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-05-28 | 1984-11-27 | 1985-05-29 | $7700.00 | Window Closed / Lapsed |