US4230926A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Electric discharge machine with mechanism for orbiting the electrode
Assignee: Individual
•
Filing: 1978-05-01
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Granted: 1980-10-28
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Expires: 1998-05-01
Abstract
Abstract An electric discharge machine has an electrode and mechanism for driving the electrode on an orbital path. The electrode is mounted on an electrode holder having an upstanding post. The electrode is driven on its orbital path by a rotor about the post. There are two resiliently loaded drive arms mounted on the rotor and engaged with the post at circumferentially spaced points so that the post is subject to the compound driving force of both drive arms. Centering mechanism is provided to restore the electrode to a centered position with respect to its orbit in the event of a short circuit between the electrode and the workpiece, thus to break the short circuit.
Inventors
- 👤 William J. Gaumond
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 04:01
CPC Classifications
B; B23; B23H; B23H7/00; B23H7/26; B23H7/28
Claims Analysis
Total Claims: 5
Claim 1
Independent Claim
99 words
In an electric discharge machine having an electrode holder and means for driving said holder on an orbital path, said means including a post on the electrode holder, a rotor about the post and a first resiliently loaded drive arm mounted on the rotor and engaged with the post, the improvement comprising a second resiliently loaded drive arm mounted on the rotor and engaged with the post at a point offset circumferentially from the point of engagement with the post of the first-mentioned drive arm whereby the post is subject to the composite driving force of both drive arms.
Claim 2
Dependent Claim
99 words
In an electric discharge machine having an electrode holder and means for driving said holder on an orbital path, said means including a post on the electrode holder, a rotor about the post and a first resiliently loaded drive arm mounted on the rotor and engaged with the post, the improvement comprising a second resiliently loaded drive arm mounted on the rotor and engaged with the post at a point offset circumferentially from the point of engagement with the post of the first-mentioned drive arm whereby the post is subject to the composite driving force of both drive arms.
Claim 3
Dependent Claim
40 words
In the machine of claim 1 in which the electrode holder is provided with a guide follower having an orbit defining hole and a guide rod through said hole, said drive arms respectively imposing components of force on the post.
Claim 4
Dependent Claim
40 words
The machine of claim 2 in which the orbit defining hole is circular, the components of force exerted on the post by the drive arms tending to smooth the movement of the guide follower with respect to the guide rod.
Claim 5
Dependent Claim
64 words
The machine of claim 2 in which the orbit defining hole is polygon shaped, one of said drive arms comprising a dominant drive arm and the other drive arm comprising a subservient drive arm which imposes a component of force on the post which opposes the force imposed by the dominant arm and reduces the shock of impact of the guide rod and follower.
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) | 1983-10-28 | 1984-04-28 | 1984-10-28 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1987-10-28 | 1988-04-28 | 1988-10-28 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1991-10-28 | 1992-04-28 | 1992-10-28 | $7700.00 | Window Closed / Lapsed |