Patent US3803901A successfully refreshed from Google Patents.
US3803901A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Pipe tester
Assignee: VIL-USA Inc
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Filing: 1972-10-10
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Granted: 1974-04-16
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Expires: 1992-10-10
Abstract
Abstract The pipe tester head is adapted to seal on the interior surface of a pipe slightly inward of the pipe coupling and on the exterior surface of the pipe coupling. The main housing includes a central chamber partly defined by the annular seal which engages the pipe coupling. An elongated rod extends through the central chamber and out of the main housing and has the annular seal which engages the pipe interior positioned thereabout. The pipe to be tested slides over the pipe seal and into the central chamber. The pipe tester head includes a plurality of purge lines, a test fluid inlet and an interchangeable inner assembly to accommodate different size pipe.
Inventors
- 👤 Connell W Mc
- 👤 W Bradley
- 👤 H Chappell
- 👤 R Carey
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-07 20:16
CPC Classifications
G; G01; G01M; G01M3/00; G01M3/02; G01M3/022
Claims Analysis
Total Claims: 18
Claim 1
Independent Claim
140 words
A pipe tester head for testing pipe length threaded to a coupling comprising: A. a main housing having an opening therethrough; B. a rod having a first shouldered portion and connected to the housing and extending through and out of the opening to form a chamber between the rod and the housing; C. a recessed annular seal plate secured against said first shouldered portion; D. first annular seal means mounted about the rod external of the opening and cooperating with the seal plate recess to sealably engage the interior surface of a pipe slightly spaced from the coupling; E. second annular seal means retained within the chamber to sealably engage the exterior surface of the coupling; F. fluid inlet means cooperating with the chamber to provide fluid thereto; and G. purge means cooperating with the chamber to permit purging thereof.
Claim 2
Dependent Claim
140 words
A pipe tester head for testing pipe length threaded to a coupling comprising: A. a main housing having an opening therethrough; B. a rod having a first shouldered portion and connected to the housing and extending through and out of the opening to form a chamber between the rod and the housing; C. a recessed annular seal plate secured against said first shouldered portion; D. first annular seal means mounted about the rod external of the opening and cooperating with the seal plate recess to sealably engage the interior surface of a pipe slightly spaced from the coupling; E. second annular seal means retained within the chamber to sealably engage the exterior surface of the coupling; F. fluid inlet means cooperating with the chamber to provide fluid thereto; and G. purge means cooperating with the chamber to permit purging thereof.
Claim 3
Dependent Claim
30 words
The pipe tester of claim 1, said first annular seal means positioned between said seal plate and an annular flange member positioned against a second shouldered portion of the rod.
Claim 4
Dependent Claim
146 words
A pipe tester head for testing pipe length threaded to a coupling comprising: A. a main housing having an opening therethrough; B. an inner assembly positioned within the opening; C. an apertured outer plate connected to the housing for retaining the inner assembly in place; D. a rod connected to the housing and extending through and out of the opening and outer plate to form a chamber defined by the rod, the inner assembly and the housing; E. first annular seal means mounted about the rod external of the opening to sealably engage the interior surface of a pipe slightly spaced from the coupling; F. second annular seal means retained within the chamber to sealably engage the exterior surface of the coupling; G. fluid inlet means cooperating with the chamber to provide fluid thereto; and H. purge means cooperating with the chamber to permit purging thereof.
Claim 5
Dependent Claim
146 words
A pipe tester head for testing pipe length threaded to a coupling comprising: A. a main housing having an opening therethrough; B. an inner assembly positioned within the opening; C. an apertured outer plate connected to the housing for retaining the inner assembly in place; D. a rod connected to the housing and extending through and out of the opening and outer plate to form a chamber defined by the rod, the inner assembly and the housing; E. first annular seal means mounted about the rod external of the opening to sealably engage the interior surface of a pipe slightly spaced from the coupling; F. second annular seal means retained within the chamber to sealably engage the exterior surface of the coupling; G. fluid inlet means cooperating with the chamber to provide fluid thereto; and H. purge means cooperating with the chamber to permit purging thereof.
Claim 6
Dependent Claim
19 words
The pipe tester of claim 3 wherein said purge means includes a plurality of parallel and spaced purge ducts.
Claim 7
Dependent Claim
32 words
The pipe tester head of claim 3, said opening being partly defined by a shouldered rear section of the main housing, said rod including a flange portion abutting said shouldered rear section.
Claim 8
Dependent Claim
34 words
The pipe tester head of claim 5 wherein the opening in the main housing is partly defined by a stepped wall construction with said purge ducts extending through certain of the stepped walls, respectively.
Claim 9
Dependent Claim
33 words
The pipe tester head of claim 6 wherein said innEr assembly includes a multi-shouldered insert member adapted to cooperate with certain of the stepped walls to close off certain of said purge means.
Claim 10
Dependent Claim
41 words
The pipe tester head of claim 7 including a seal retaining member positioned adjacent the second annular seal means and cooperating with a shoulder of the outer plate and the insert member to retain the second annular seal means in place.
Claim 11
Dependent Claim
25 words
The pipe tester of claim 7 including a third seal means positioned between an inner end of the insert member and an adjacent stepped wall.
Claim 12
Dependent Claim
36 words
The pipe tester head of claim 5, said rod being connected to said housing by nut means threadably engaging the rod to retain the flange portion thereof against the shouldered rear section of the main housing.
Claim 13
Dependent Claim
20 words
The pipe tester head of claim 10 including fourth seal means about the rod positioned substantially adjacent the nut means.
Claim 14
Dependent Claim
25 words
The pipe tester of claim 11 wherein said fourth seal means are positioned within a recess formed in the rear section of the main housing.
Claim 15
Dependent Claim
19 words
The pipe tester of claim 12 wherein a channel extends between said recess and one of said purge ducts.
Claim 16
Dependent Claim
26 words
The pipe tester head of claim 7 wherein the multi-shouldered insert member includes a plurality of orifices extending therethrough in the area of the inward portion.
Claim 17
Dependent Claim
36 words
The pipe tester head of claim 7 wherein said inner assembly includes an annular seal plate positioned within a recess in the outer plate and extending within the opening to engage the second annular seal means.
Claim 18
Dependent Claim
25 words
The pipe testerhead of claim 15 including an annular spacer ring positioned adjacent the insert member to retain the second annular seal means in position.
References Cited (Backward Citations)
US2155602A
Cited
US2663183A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1977-04-15 | 1977-10-15 | 1978-04-16 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1981-04-15 | 1981-10-15 | 1982-04-16 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1985-04-15 | 1985-10-15 | 1986-04-16 | $7700.00 | Window Closed / Lapsed |