US4382421A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Tube coating apparatus
Assignee: VETCO SERVICES Inc A CORP OF DE
•
Filing: 1981-11-23
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Granted: 1983-05-10
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Expires: 2001-11-23
Abstract
Abstract An apparatus for coating the interior of a tube (10) with fusible particles entrained in a flow of air. A measured charge is placed in an unpacked condition within a container (18) temporarily isolated (20) from a first end of the tube. A vacuum is established in the tube and in a tank (34) connected to the second end of the tube. A quick-opening valve (20) thereafter places the container in fluid communication with the first end of the tube.
Inventors
- 👤 David A. Warren
- 👤 Edwin D. McCrory, Jr.
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-09 12:59
CPC Classifications
B; B05; B05C; B05C19/00; B05C19/005; B05C19/007; B05D; B05D7/00; B05D7/22; B05D7/222; B05D1/00; B05D1/002; B05D2401/00; B05D2401/30; B05D2401/32; B05D3/00; B05D3/02; B05D3/0218; B05D3/04; B05D3/0493
Claims Analysis
Total Claims: 12
Claim 1
Independent Claim
149 words
An apparatus for lining a heated tube comprising: means for supporting and rotating the tube to be lined; a container for holding fusible particles which are to be delivered to said tube; a feedpipe connected to said container and sealably connectable to one end of the tube to be coated; an imperforate tank having a volume greater than the tube to be coated, and having an inlet connection and an outlet connection; a discharge pipe connectable to the second end of the tube to be lined and connected to the inlet connection of said tank; a quick-opening valve located in said feedpipe; a vacuum pump connected to the outlet connection of said tank; sensing means for sensing the level of vacuum within the heated tube; and means for quickly opening said quick-opening valve in response to said sensing means when the measured vacuum level reaches a predetermined vacuum level.
Claim 2
Independent Claim
149 words
An apparatus for lining a heated tube comprising: means for supporting and rotating the tube to be lined; a container for holding fusible particles which are to be delivered to said tube; a feedpipe connected to said container and sealably connectable to one end of the tube to be coated; an imperforate tank having a volume greater than the tube to be coated, and having an inlet connection and an outlet connection; a discharge pipe connectable to the second end of the tube to be lined and connected to the inlet connection of said tank; a quick-opening valve located in said feedpipe; a vacuum pump connected to the outlet connection of said tank; sensing means for sensing the level of vacuum within the heated tube; and means for quickly opening said quick-opening valve in response to said sensing means when the measured vacuum level reaches a predetermined vacuum level.
Claim 3
Dependent Claim
42 words
An apparatus as in claim 1 having also: a plurality of supplementary tanks; a plurality of pipes fluidly connecting each of said supplementary tanks to said imperforate tank; and means for selectively isolating each of said supplementary tanks from said imperforate tank.
Claim 4
Dependent Claim
18 words
An apparatus as in claim 1: having also valve means for isolating said imperforate tank from the tube.
Claim 5
Dependent Claim
22 words
An apparatus as in claim 1: having also measuring means for depositing in said container only a predetermined quantity of fusible particles.
Claim 6
Dependent Claim
22 words
An apparatus as in claim 4: wherein the flow area of said feedpipe is less than the flow area of said tube.
Claim 7
Dependent Claim
13 words
An apparatus as in claim 4: wherein said measuring means comprises weighing means.
Claim 8
Independent Claim
30 words
An apparatus as in any one of claims 1 or 2 through 6: having also a dust collector located downstream of said imperforate tank and upstream of said vacuum pump.
Claim 9
Dependent Claim
34 words
An apparatus as in claim 2: having also a dust collector located downstream of said imperforate tank and upstream of said vacuum pump; and valve means for isolating said imperforate tank from the tube.
Claim 10
Dependent Claim
22 words
An apparatus as in claim 8: having also measuring means for depositing in said container only a predetermined quantity of fusible particles.
Claim 11
Dependent Claim
23 words
An apparatus as in claim 9: wherein the flow area of said feed pipe is less than the flow area of said tube.
Claim 12
Dependent Claim
13 words
An apparatus as in claim 10: wherein said measuring means comprises weighing means.
References Cited (Backward Citations)
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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) | 1986-05-09 | 1986-11-08 | 1987-05-10 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1990-05-09 | 1990-11-08 | 1991-05-10 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1994-05-09 | 1994-11-08 | 1995-05-10 | $7700.00 | Window Closed / Lapsed |