US3881083A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Welding apparatus
Assignee: Dover Corp
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Filing: 1973-10-23
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Granted: 1975-04-29
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Expires: 1993-10-23
Abstract
Abstract A resistance welding apparatus comprises a pair of contrarotating electrode wheels and includes a nonconductive disc affixed to one face of one of the wheels with the disc having a diameter less than that of the wheel and serving as a rigid abutment against which a surface of a traveling work piece is urged to maintain proper alignment of the weld seam as formed by the electrode wheels.
Inventors
- 👤 Thomas D Bromley
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 23:37
CPC Classifications
B; B23; B23K; B23K11/00; B23K11/30; B23K11/3036
Claims Analysis
Total Claims: 7
Claim 1
Independent Claim
159 words
A welding apparatus including, a rotatable shaft, a rotary electrode wheel rigidly affixed to said shaft to preclude axial and radial displacement relative thereto, said wheel having a peripheral welding surface adapted to be pressure urged against a workpiece provided with a raised portion disposed laterally spaced from that surface of the workpiece intended to be welded by said peripheral surface, a rigid guide disc affixed in a concentric stationary juxtaposed manner to one side of said wheel and provided with an outer face, said disc of non-conductive material and having a circular peripheral surface of a diameter less than that of said wheel peripheral surface, said rigid disc outer face and peripheral surface disposed axially and radially substantially clear of said wheel peripheral surface, whereby, as said electrode wheel peripheral surface engages and travels over said workpiece said disc outer face is urged against said workpiece raised portion to maintain said wheel peripheral surface a constant distance therefrom.
Claim 2
Dependent Claim
159 words
A welding apparatus including, a rotatable shaft, a rotary electrode wheel rigidly affixed to said shaft to preclude axial and radial displacement relative thereto, said wheel having a peripheral welding surface adapted to be pressure urged against a workpiece provided with a raised portion disposed laterally spaced from that surface of the workpiece intended to be welded by said peripheral surface, a rigid guide disc affixed in a concentric stationary juxtaposed manner to one side of said wheel and provided with an outer face, said disc of non-conductive material and having a circular peripheral surface of a diameter less than that of said wheel peripheral surface, said rigid disc outer face and peripheral surface disposed axially and radially substantially clear of said wheel peripheral surface, whereby, as said electrode wheel peripheral surface engages and travels over said workpiece said disc outer face is urged against said workpiece raised portion to maintain said wheel peripheral surface a constant distance therefrom.
Claim 3
Dependent Claim
12 words
A welding apparatus according to claim 1 wherein, said disc is planar.
Claim 4
Dependent Claim
15 words
A welding apparatus according to claim 1 wherein, said disc peripheral surface is a bevel.
Claim 5
Dependent Claim
40 words
A welding apparatus according to claim 1 wherein, said electrode wheel is attached to the end of said shaft by means of removable fasteners, said disc including a central annular aperture and fastener means securing said disc to said wheel.
Claim 6
Dependent Claim
23 words
A welding apparatus according to claim 1 wherein, said disc includes a pair of split half-sections each provided with a semi-circular peripheral edge.
Claim 7
Dependent Claim
33 words
A welding apparatus according to claim 1 wherein, said disc comprises a lesser diameter section overlying a greAter diameter section adapted to engage a workpiece provided with a pair of offset raised portions.
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) | 1978-04-28 | 1978-10-28 | 1979-04-29 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1982-04-28 | 1982-10-28 | 1983-04-29 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1986-04-28 | 1986-10-28 | 1987-04-29 | $7700.00 | Window Closed / Lapsed |