Patent US4554431A successfully refreshed from Google Patents.
US4554431A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Water shield ring for plasma arc cutting torch
Assignee: Deere and Co
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Filing: 1984-06-04
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Granted: 1985-11-19
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Expires: 2004-06-04
Abstract
Abstract A plasma arc cutting apparatus includes an adjustment member adjustably supporting a cutting torch. A rod is mounted to the adjustment member at one end and to a water shield ring at the other end for supporting the water shield in radially spaced apart relationship around a portion of the cutting torch.
Inventors
- 👤 David L. Koeller
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 10:49
CPC Classifications
B; B23; B23K; B23K9/00; B23K9/24; B23K9/28; B23K9/29; B23K37/00; B23K37/003
Claims Analysis
Total Claims: 3
Claim 1
Independent Claim
102 words
In combination with a plasma arc cutting machine having a mounting cylinder, a torch support member mounted to said mounting cylinder, a cutting torch having a lower tip portion, said torch being mounted to said torch support member, and a water shield ring; wherein the improvement comprises: a rod fixably mounted at one end to said torch support member; said water shield ring being fixably mounted to said rod at said rod's other end to maintain said water shield ring in close spaced apart radial relationship to said torch and in close vertical relationship with said lower tip portions of said torch.
Claim 2
Dependent Claim
102 words
In combination with a plasma arc cutting machine having a mounting cylinder, a torch support member mounted to said mounting cylinder, a cutting torch having a lower tip portion, said torch being mounted to said torch support member, and a water shield ring; wherein the improvement comprises: a rod fixably mounted at one end to said torch support member; said water shield ring being fixably mounted to said rod at said rod's other end to maintain said water shield ring in close spaced apart radial relationship to said torch and in close vertical relationship with said lower tip portions of said torch.
Claim 3
Dependent Claim
84 words
A combination as claimed in claim 1 wherein said water shield ring comprises: a tubular ring singularly discontinuous, said tubular ring having a plurality of apertures in radially spaced apart relationship therearound the underside of said tubular ring and directed inwardly towards said lower tip portion of said torch; an end cap fixably mounted to one end of said tubular ring; an elbow coupler fixably mounted to the other end of said tubular ring; and means for delivering shielding water to said elbow coupler.
References Cited (Backward Citations)
US3487194A
Cited
US3833787A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1988-11-18 | 1989-05-20 | 1989-11-19 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1992-11-18 | 1993-05-20 | 1993-11-19 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1996-11-18 | 1997-05-20 | 1997-11-19 | $7700.00 | Window Closed / Lapsed |