US4049943A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Welding apparatus
Assignee: K A L Manufacturing CORP
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Filing: 1975-10-06
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Granted: 1977-09-20
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Expires: 1995-10-06
Abstract
Abstract Welding apparatus comprising a power and gas transmission cable having coupling means including normally closed valve means for controlling passage of gas from said cable, a first welding torch including a gas passage and having first torch coupling means adapted for connection to said cable coupling means, said torch coupling means including means for opening said valve means with said first torch and cable coupling means connected, and a second welding torch having second torch coupling means adapted for connection to said cable coupling means, said second torch coupling means adapted to maintain said valve means closed with said second torch and cable coupling means connected.
Inventors
- 👤 Wayne F. Pratt
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 16:30
CPC Classifications
B; B23; B23K; B23K9/00; B23K9/32; B23K9/323
Claims Analysis
Total Claims: 8
Claim 1
Independent Claim
280 words
Welding apparatus comprising, in combination: a cable having a first electrical conductor and a first gas passage, said cable at one end having conductive cable coupling means, said cable coupling means connected to said first conductor and having a valved gas passage, including normally closed valve means, in communication with said first gas passage; a first welding torch adapted to hold a first electrode and having a gas outlet adjacent the position of said first electrode in said torch, said first torch having a second electrical conductor therewithin adapted for connection to said first electrode and a torch gas passage therewithin in communication with said gas outlet, and said first torch having conductive first torch coupling means, said first torch coupling means connected to said second conductor and having a torch coupling gas passage in communication with said second gas passage, said first torch coupling means adapted for selective electrically conductive connection to said cable coupling means with said torch coupling gas passage in communication with said valved gas passage, said first torch coupling means including means for opening said valve means with said first torch coupling means and said cable coupling means connected; and a second welding torch adapted to hold a second electrode, said second torch having a third electrical conductor therewithin adapted for connection to said second electrode, and said second torch having conductive second torch coupling means connected to said third conductor, said second torch coupling means adapted for selective electrically conductive connection to said cable coupling means, said second torch coupling means adapted to maintain said valve means in said normally closed position with said second torch coupling means and said cable coupling means connected.
Claim 2
Dependent Claim
280 words
Welding apparatus comprising, in combination: a cable having a first electrical conductor and a first gas passage, said cable at one end having conductive cable coupling means, said cable coupling means connected to said first conductor and having a valved gas passage, including normally closed valve means, in communication with said first gas passage; a first welding torch adapted to hold a first electrode and having a gas outlet adjacent the position of said first electrode in said torch, said first torch having a second electrical conductor therewithin adapted for connection to said first electrode and a torch gas passage therewithin in communication with said gas outlet, and said first torch having conductive first torch coupling means, said first torch coupling means connected to said second conductor and having a torch coupling gas passage in communication with said second gas passage, said first torch coupling means adapted for selective electrically conductive connection to said cable coupling means with said torch coupling gas passage in communication with said valved gas passage, said first torch coupling means including means for opening said valve means with said first torch coupling means and said cable coupling means connected; and a second welding torch adapted to hold a second electrode, said second torch having a third electrical conductor therewithin adapted for connection to said second electrode, and said second torch having conductive second torch coupling means connected to said third conductor, said second torch coupling means adapted for selective electrically conductive connection to said cable coupling means, said second torch coupling means adapted to maintain said valve means in said normally closed position with said second torch coupling means and said cable coupling means connected.
Claim 3
Dependent Claim
56 words
The apparatus claimed in claim 1 in which said means in said first welding torch for opening said valve means comprises an extension of said first torch coupling means adapted to engage and depress said valve means and in which said second torch coupling means is adapted to overlie but not to depress said valve means.
Claim 4
Dependent Claim
44 words
The apparatus claimed in claim 1 in which said cable coupling means and said torch coupling means are cylindrical with said gas passages axially positioned therein and said torch coupling means are adapted for rotation relative to said cable coupling means when connected thereto.
Claim 5
Dependent Claim
55 words
The apparatus claimed in claim 3 in which said cable coupling means comprises a female fitting, said torch coupling means comprise male fittings, and one of said cable coupling means and said torch coupling means includes latching means for latching said one to the other of said cable coupling means and said torch coupling means.
Claim 6
Dependent Claim
71 words
The apparatus claimed in claim 4 in which said other of said cable coupling means and said torch coupling means includes annular groove means for receiving said latching means, said latching means include a plurality of circumferentially positioned latching members, means normally biasing said latching members in the direction of said groove, and means for selectively permitting said latching members to move radially in a direction away from said groove means.
Claim 7
Dependent Claim
26 words
The apparatus claimed in claim 5 in which said cable coupling means includes said latching means and said torch coupling means each include said groove means.
Claim 8
Dependent Claim
56 words
The apparatus claimed in claim 6 in which said means in said first welding torch for opening said valve means comprises an extension of said first torch coupling means adapted to engage and depress said valve means and in which said second torch coupling means is adapted to overlie but not to depress said valve means.
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) | 1980-09-19 | 1981-03-21 | 1981-09-20 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1984-09-19 | 1985-03-21 | 1985-09-20 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1988-09-19 | 1989-03-21 | 1989-09-20 | $7700.00 | Window Closed / Lapsed |