US3739747A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Machine for applying coating material to pipe
Assignee: Lukens General Industries Inc
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Filing: 1970-12-16
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Granted: 1973-06-19
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Expires: 1990-12-16
Abstract
Abstract A machine for coating pipe, making use of a dry mixture of coating materials, such as hydraulic cement, sand or gravel, and weight imparting material such as barite, iron oxide, or the like. The machine has a rotary impeller for projecting the dry mix from a supply source of the same toward the pipe to be coated, and includes moistening means, such as a water spray, through which the dry mixture passes after leaving the impeller to form a wet mixture which is impelled against the pipe. Means is provided for feeding the dry mix to the impeller in a substantially constant, regulated stream and for controlling the amount of water added whereby the consistency of the coating can be regulated. Mechanism is provided for causing the dry mix and water to be supplied simultaneously, automatically upon operation of the machine, and for independently regulating the flow of dry mix as well as the flow of water while the machine is in operation.
Inventors
- 👤 R Sullivan
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 06:06
CPC Classifications
B; B28; B28B; B28B1/00; B28B1/30; B28B1/32; B28B13/00; B28B13/02; B28B19/00; B28B19/0038
Claims Analysis
Total Claims: 9
Claim 1
Independent Claim
140 words
A pipe coating apparatus comprising a housing having an inlet and an outlet below the inlet; means for introducing a dry coating material into the housing through the inlet; a rotating impeller in the housing positioned for co-action with the material to propel the material through said outlet with increased velocity from said impeller; said impeller including a generally horizontal shaft and generally circular hub thereabout with a plurality of curved impeller blades on said hub for engaging the material and propelling it downwardly through said outlet; means for supporting a pipe for horizontal movement along and rotation about its axis below said outlet at a point to intercept the dry material from said outlet; and, means for adding water to the dry material prior to its contact with the pipe to convert the dry material into an adhesive mixture.
Claim 2
Dependent Claim
140 words
A pipe coating apparatus comprising a housing having an inlet and an outlet below the inlet; means for introducing a dry coating material into the housing through the inlet; a rotating impeller in the housing positioned for co-action with the material to propel the material through said outlet with increased velocity from said impeller; said impeller including a generally horizontal shaft and generally circular hub thereabout with a plurality of curved impeller blades on said hub for engaging the material and propelling it downwardly through said outlet; means for supporting a pipe for horizontal movement along and rotation about its axis below said outlet at a point to intercept the dry material from said outlet; and, means for adding water to the dry material prior to its contact with the pipe to convert the dry material into an adhesive mixture.
Claim 3
Dependent Claim
28 words
The structure of claim 1 including a downwardly directed elongated outlet cooperative with said housing wherein the axis of elongation is parallel to the axis of the pipe.
Claim 4
Dependent Claim
62 words
The structure of claim 1 wherein said impeller includes a plurality of individually positioned and adjustable blades spaced about said hub, said blades including a structural support member connected to said hub and supporting a curved face having a radius of curvature facing the direction of rotation of said impeller, and including connective means for connecting said support members to said hub.
Claim 5
Dependent Claim
42 words
The apparatus of claim 3 including in said adding means a multiple outlet water spray system parallel to the pipe and directing a stream of water toward the stream of dry material and intercepting such dry material prior to coating the pipe.
Claim 6
Dependent Claim
62 words
The apparatus of claim 1 further including an elongate funnel shaped inlet having a greater dimension along along an axis parallel to the pipe to be coated, said inlet opening into said housing at a point above said rotating impeller but not vertically above the axis of rotation thereof and on the side of said impeller which is downwardly directed in movement.
Claim 7
Dependent Claim
11 words
The apparatus of claim 1 including means for rotating the pipe.
Claim 8
Dependent Claim
12 words
The apparatus of claim 6 including means for translating the pipe longitudinally.
Claim 9
Dependent Claim
28 words
The apparatus of claim 1 wherein said housing is open at its bottom portions and said rotating impeller co-acts with one edge wall thereof to define said outlet.
References Cited (Backward Citations)
US2721147A
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US1623539A
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US2373638A
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US2470068A
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US2764218A
Cited
US2669436A
Cited
US2795406A
Cited
US2809866A
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1976-06-18 | 1976-12-18 | 1977-06-19 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-06-18 | 1980-12-18 | 1981-06-19 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-06-18 | 1984-12-18 | 1985-06-19 | $7700.00 | Window Closed / Lapsed |