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Class Information
Number: 138/90
Name: Pipes and tubular conduits > With closures and plugs > Test plugs
Description: Plugs for pipes having provisions whereby a fluid may be introduced into the pipe through the plug or for the attachment of a gauge for the purpose of testing the pipe for leaks.
Patents under this class:
| Patent Number |
Title Of Patent |
Date Issued |
| 4427032 |
Service line interior by-pass |
Jan. 24, 1984 |
| 4385643 |
Plug for high-pressure testing of tubes |
May. 31, 1983 |
| 4381800 |
Pipe tester plug |
May. 3, 1983 |
| 4377185 |
Hydrotest apparatus |
Mar. 22, 1983 |
| 4371005 |
Protective cover for underwater flow line hub |
Feb. 1, 1983 |
| 4357948 |
Smoke filtering and cooling device |
Nov. 9, 1982 |
| 4354515 |
Drain pipe flushing apparatus |
Oct. 19, 1982 |
| 4342336 |
Double-acting inflatable seal |
Aug. 3, 1982 |
| 4328837 |
Apparatus for mounting a pipe in an opening in a pressure vessel wall |
May. 11, 1982 |
| 4316487 |
Tubular obturator for use with a hollow body |
Feb. 23, 1982 |
| 4314577 |
Installation, hydrostatic testing, repair and modification of large diameter fluid transmission lines |
Feb. 9, 1982 |
| 4286139 |
Coupling assembly for heating element |
Aug. 25, 1981 |
| 4281422 |
Swimming pool winterizing disconnect unit |
Aug. 4, 1981 |
| 4281535 |
Cylinder gripping apparatus |
Aug. 4, 1981 |
| 4272984 |
Pipeline leak detection method and control device therefor |
Jun. 16, 1981 |
| 4250926 |
Closure device with peripheral double acting inflatable seal |
Feb. 17, 1981 |
| 4237936 |
Pig trap closure |
Dec. 9, 1980 |
| 4235100 |
Comprehensive coolant system tester |
Nov. 25, 1980 |
| 4192177 |
Apparatus and method for pressure testing of tubular bodies |
Mar. 11, 1980 |
| 4190196 |
Centrifuge tube cap |
Feb. 26, 1980 |
| 4168621 |
Plumbing test gauge |
Sep. 25, 1979 |
| 4166479 |
Blind liner for service pipes |
Sep. 4, 1979 |
| 4163462 |
Test plug |
Aug. 7, 1979 |
| 4149566 |
Elastomeric test cup for tubing pressure testing |
Apr. 17, 1979 |
| 4122592 |
Test plug assembly and method for pressure testing the inlet connection for liquid jet floor outlet fittings |
Oct. 31, 1978 |
| 4091842 |
Resealable sealing assembly for inspection port hole |
May. 30, 1978 |
| 4077250 |
Pipe closure apparatus |
Mar. 7, 1978 |
| 4044798 |
Adhesive bonded hydrotest plug and method for using the same |
Aug. 30, 1977 |
| 4040289 |
Method and arrangement for air testing of sewer lateral connections |
Aug. 9, 1977 |
| 3990605 |
Closure means for circular openings of large diameter |
Nov. 9, 1976 |
| 3983904 |
Plug assembly for sealing a pipe |
Oct. 5, 1976 |
| 3978892 |
Self-locking plug apparatus for sealing and recovering a pipeline laid on a deep submerged bed |
Sep. 7, 1976 |
| 3958557 |
Coronary artery bypass graft testing device and method |
May. 25, 1976 |
| 3941156 |
Plumbing test fitting |
Mar. 2, 1976 |
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