Patent US4329559A successfully refreshed from Google Patents.
US4329559A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Resistance welder
Assignee: Toyota Motor Corp
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Filing: 1980-07-03
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Granted: 1982-05-11
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Expires: 2000-07-03
Abstract
Abstract In effecting resistance welding, fluid pressure is applied to a piston in a cylinder to drive the piston rod ahead so that work being welded is clamped between an electrode provided at the end of the rod and another electrode carried by an arm to apply a suitable welding pressure to the work. As the piston is further moved ahead, a collector ring is expanded radially outwardly to make electrical contact with the power feeding liner, so that welding current fed from a feeder cable is supplied to the electrode through the cylinder, feeding liner, collector ring, collector plate and the rod, thereby to effect the welding while applying a suitable pressure to the work.
Inventors
- 👤 Tomomi Kishi
- 👤 Yoshitaka Yamamoto
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 12:06
CPC Classifications
B; B23; B23K; B23K11/00; B23K11/30; B23K11/31; B23K11/314; B23K11/315
Claims Analysis
Total Claims: 5
Claim 1
Independent Claim
109 words
A resistance welder comprising a pressurizing cylinder, a first electrode attached to the end of a rod inside said pressurizing cylinder and a second electrode attached to an arm secured to said pressurizing cylinder, characterized in that said pressurizing cylinder also serves as an electric power feeding cylinder, said pressurizing cylinder slidably receiving a piston provided with a collector plate electrically connected to said rod attached to said first electrode, said collector plate being electrically contacted by a collector ring which is adapted to radially expand to make selective electrical contact with the inner surface of said cylinder, and a spring interposed between said piston and said collector plate.
Claim 2
Dependent Claim
109 words
A resistance welder comprising a pressurizing cylinder, a first electrode attached to the end of a rod inside said pressurizing cylinder and a second electrode attached to an arm secured to said pressurizing cylinder, characterized in that said pressurizing cylinder also serves as an electric power feeding cylinder, said pressurizing cylinder slidably receiving a piston provided with a collector plate electrically connected to said rod attached to said first electrode, said collector plate being electrically contacted by a collector ring which is adapted to radially expand to make selective electrical contact with the inner surface of said cylinder, and a spring interposed between said piston and said collector plate.
Claim 3
Dependent Claim
45 words
A resistance welder as claimed in claim 1, wherein said collector ring is clamped between said piston and said collector plate and is clamped to contract radially inwardly by a ring, said collector ring being in contact with said piston through a tapered surface thereof.
Claim 4
Dependent Claim
26 words
A resistance welder as claimed in claim 1 or 2, wherein said collector plate possesses a thickness which permits a forward flexing of said collector plate.
Claim 5
Dependent Claim
26 words
A resistance welder as claimed in claim 1 or 2, characterized in that a feeding liner is provided on the inner peripheral surface of said cylinder.
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) | 1985-05-10 | 1985-11-09 | 1986-05-11 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1989-05-10 | 1989-11-09 | 1990-05-11 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1993-05-10 | 1993-11-09 | 1994-05-11 | $7700.00 | Window Closed / Lapsed |