Patent DE872432C successfully refreshed from Google Patents.
Patent US3591756A successfully refreshed from Google Patents.
US3591756A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Timed-hydraulic dampener for suppression of electrode bounce in welding of can body seams
Assignee: Continental Can Co Inc
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Filing: 1969-12-09
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Granted: 1971-07-06
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Expires: 1989-12-09
Abstract
Abstract This disclosure relates to a dampener for suppressing the normal electrode bounce which occurs when lapped portions to be welded move in between a pair of roller electrodes and force the electrodes apart. The dampener is particularly constructed to be operable primarily at the time the lapped portions move in between the electrodes.
Inventors
- 👤 Charles A Timko
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 21:35
CPC Classifications
B; B23; B23K; B23K11/00; B23K11/06; B23K11/061; B23K11/062; B23K11/063; B23K2101/00; B23K2101/04; B23K2101/12
Claims Analysis
Total Claims: 10
Claim 1
Independent Claim
104 words
An apparatus for welding lap seams of moving spaced apart tubular members comprising a support for guiding tubular members along a predetermined path and means for sequentially moving tubular members along said support, inner and outer opposed roller electrodes, pressure means for urging said electrodes together under a continuous pressure, and control means intermediate said pressure means and said electrodes for eliminating electrode bounce by retarding the movement of said electrodes apart as a leading edge of a tubular member passes in between said electrodes while permitting substantially freedom of movement of said electrodes during a welding operation as dictated by said pressure means.
Claim 2
Independent Claim
104 words
An apparatus for welding lap seams of moving spaced apart tubular members comprising a support for guiding tubular members along a predetermined path and means for sequentially moving tubular members along said support, inner and outer opposed roller electrodes, pressure means for urging said electrodes together under a continuous pressure, and control means intermediate said pressure means and said electrodes for eliminating electrode bounce by retarding the movement of said electrodes apart as a leading edge of a tubular member passes in between said electrodes while permitting substantially freedom of movement of said electrodes during a welding operation as dictated by said pressure means.
Claim 3
Dependent Claim
17 words
The apparatus of claim 1 wherein said control means is in the form of a dash pot.
Claim 4
Dependent Claim
34 words
The apparatus of claim 1 wherein said control means is in the form of a dash pot and said dash pot having a bypass assembly operable during welding to render said dash pot inoperative.
Claim 5
Dependent Claim
33 words
The apparatus of claim 3 wherein said bypass assembly includes a control valve, and means for operating said control valve in timed relation to the movement of tubular members relative to said electrodes.
Claim 6
Dependent Claim
42 words
The apparatus of claim 3 wherein said bypass assembly includes a control valve, and means connected to said means for sequentially moving tubular members for operating said control valve in timed relation to the movement of tubular members relative to said electrodes.
Claim 7
Dependent Claim
36 words
The apparatus of claim 1 wherein said control means is in the form of a dash pot, said dash pot including a piston particularly adapted to having different pumping actions for different directions of movement thereof.
Claim 8
Dependent Claim
58 words
The apparatus of claim 1 wherein said control means is in the form of a dash pot, said dash pot including a piston particularly adapted to having different pumping actions for different directions of movement thereof, one face of said piston having a scooped out configuration and the other face of said piston having a tapered peripheral edge.
Claim 9
Dependent Claim
42 words
The apparatus of claim 1 wherein said control means is in the form of a dash pot, said dash pot including a cylinder and a piston with there being a predetermined spacing of said piston from said cylinder to form an orifice.
Claim 10
Dependent Claim
38 words
The welding apparatus of claim 8 wherein said clearance flares in the direction opposite to piston bounce to provide a higher drag coefficient in the direction of bounce as opposed to the drag coefficient in the opposite direction.
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) | 1974-07-05 | 1975-01-04 | 1975-07-06 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-07-05 | 1979-01-04 | 1979-07-06 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-07-05 | 1983-01-04 | 1983-07-06 | $7700.00 | Window Closed / Lapsed |