Patent US4289093A successfully refreshed from Google Patents.
Patent US3797745A successfully refreshed from Google Patents.
US3797745A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Apparatus for spraying refractory lining
Assignee: Individual
•
Filing: 1973-01-24
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Granted: 1974-03-19
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Expires: 1993-01-24
Abstract
Abstract A lining gun for spraying refractory lining on the interior of ladles and the like which includes two elongate concentrically disposed conduits through which dry refractory material and water are respectively passed at one end and sprayed through mixing nozzles at the opposite end. Each conduit includes a rotary coupling immediate its length and cooperates with a motor driven ring and pinion assembly which rotates the lower portion of the apparatus including the nozzles for circular spraying.
Inventors
- 👤 J Haus
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 17:13
CPC Classifications
B; B05; B05B; B05B13/00; B05B13/06; B05B13/069; B05B13/0627; B05B13/0636; B05B3/00; B05B3/02; F; F27; F27D; F27D1/00; F27D1/16; F27D1/1636; F27D1/1673
Claims Analysis
Total Claims: 5
Claim 1
Independent Claim
172 words
A lining gun for spraying a refractory lining on the interior of deep walled refractory bodies such as ladles and the like comprising: a first elongate conduit having an entrance end through which dry refractory material is air conveyed and terminating at its opposite end in a mixing discharge nozzle through which the refractory material is sprayed; a second elongate conduit disposed within and concentric of the first conduit and including an entrance end for receiving a wetting agent for the refractory material and terminating at its opposite end in communication with the mixing nozzle; first and second rotary coupling means connected to the first and second conduits respectively intermediate their entrance ends and the discharge nozzle permitting relative rotary motion between the entrance ends of the conduits and the discharge nozzle; and drive means for driving the discharge nozzle in a rotary manner whereby the nozzle may be drAwn axially through the refractory body as the nozzle is rotated and refractory material sprayed therefrom to uniformly coat the interior surface thereof.
Claim 2
Dependent Claim
172 words
A lining gun for spraying a refractory lining on the interior of deep walled refractory bodies such as ladles and the like comprising: a first elongate conduit having an entrance end through which dry refractory material is air conveyed and terminating at its opposite end in a mixing discharge nozzle through which the refractory material is sprayed; a second elongate conduit disposed within and concentric of the first conduit and including an entrance end for receiving a wetting agent for the refractory material and terminating at its opposite end in communication with the mixing nozzle; first and second rotary coupling means connected to the first and second conduits respectively intermediate their entrance ends and the discharge nozzle permitting relative rotary motion between the entrance ends of the conduits and the discharge nozzle; and drive means for driving the discharge nozzle in a rotary manner whereby the nozzle may be drAwn axially through the refractory body as the nozzle is rotated and refractory material sprayed therefrom to uniformly coat the interior surface thereof.
Claim 3
Dependent Claim
41 words
The lining gun of claim 1 wherein the mixing discharge nozzle includes two opposed orifices and further including means disposed adjacent each orifice and centrally of the first conduit to divide the flow of dry refractory material equally between each orifice.
Claim 4
Dependent Claim
50 words
The lining gun of claim 1 wherein the drive means includes a ring gear carried by the first conduit intermediate the coupling means and the discharge nozzle; motor means carried by the first conduit opposite the coupling means and pinion drive means interconnecting the motor means and the ring gear.
Claim 5
Dependent Claim
56 words
The lining gun of claim 3 further including bearing means secured to the first conduit intermediate the coupling means and discharge nozzle and bearing carrier means interconnecting the bearing means and the first conduit at a point opposite the coupling means from the bearing means to maintain alignment of the first conduit across the coupling means.
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) | 1977-03-18 | 1977-09-17 | 1978-03-19 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1981-03-18 | 1981-09-17 | 1982-03-19 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1985-03-18 | 1985-09-17 | 1986-03-19 | $7700.00 | Window Closed / Lapsed |