US3696447A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Leak sealing device
Assignee: Individual
•
Filing: 1970-04-02
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Granted: 1972-10-10
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Expires: 1990-04-02
Abstract
Abstract For use particularly in sealing a leak adjacent the lower end of a toilet tank overflow pipe, a tube is inserted into the top of the overflow pipe and carries a deformable packing adjacent its lower end, and a nut threaded on the tube is adapted to be turned downwardly by a tubular tool to deform the packing to seal the leak, whereupon the tubular tool is removed.
Inventors
- 👤 Ernest M Mckown
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-06 05:10
CPC Classifications
F; F16; F16L; F16L55/00; F16L55/16; F16L55/162; F16L55/165; F16L55/1657
Claims Analysis
Total Claims: 9
Claim 1
Independent Claim
101 words
A device for sealing a leak adjacent the lower end of an open topped pipe comprising a tube insertable downwardly into the uppeR end of such pipe and having an external annular flange at its lower end, a deformable packing carried by said tube to be positioned on said flange adjacent the leak when the tube is inserted in the pipe, a nut threaded on said tube above and adjacent said flange, and a tool insertable through and removable from the open end of said pipe around said tube for rotating said nut downwardly to effect the deforming of said packing.
Claim 2
Independent Claim
101 words
A device for sealing a leak adjacent the lower end of an open topped pipe comprising a tube insertable downwardly into the uppeR end of such pipe and having an external annular flange at its lower end, a deformable packing carried by said tube to be positioned on said flange adjacent the leak when the tube is inserted in the pipe, a nut threaded on said tube above and adjacent said flange, and a tool insertable through and removable from the open end of said pipe around said tube for rotating said nut downwardly to effect the deforming of said packing.
Claim 3
Dependent Claim
49 words
A device according to claim 1 wherein said tube is of smaller diameter than the internal diameter of the pipe, said tool being tubular and insertable in the space between said pipe and said tube, said tool having a polygonal socket at its lower end engageable with said nut.
Claim 4
Dependent Claim
33 words
A device according to claim 2 provided with a washer engaging the upper end of said packing and against which said nut is rotatable upon operation of said tool to deform said packing.
Claim 5
Dependent Claim
141 words
In combination with a flush valve seat of a toilet tank having a hollow radial extension and an overflow pipe fixed at its lower end in the top of said extension, a tube insertable into the upper end of said overflow pipe and limited in its downward movement to maintain communication between the lower end of said tube and said extension, an annular shoulder formed on said tube at the lower end thereof and having its upper limit position below the top of said extension, an annular deformable packing element surrounding said tube and engaging at its lower end with said shoulder, and means for exerting a downward force against the upper end of said packing to deform it into tight engagement with the inner surface of said overflow pipe to seal a leak therethrough adjacent the top of said extension.
Claim 6
Dependent Claim
141 words
In combination with a flush valve seat of a toilet tank having a hollow radial extension and an overflow pipe fixed at its lower end in the top of said extension, a tube insertable into the upper end of said overflow pipe and limited in its downward movement to maintain communication between the lower end of said tube and said extension, an annular shoulder formed on said tube at the lower end thereof and having its upper limit position below the top of said extension, an annular deformable packing element surrounding said tube and engaging at its lower end with said shoulder, and means for exerting a downward force against the upper end of said packing to deform it into tight engagement with the inner surface of said overflow pipe to seal a leak therethrough adjacent the top of said extension.
Claim 7
Dependent Claim
37 words
The combination defined in claim 4 wherein said tube is slideable through said overflow pipe, and means for limiting downward movement of said tube to maintain communication between the lower end of said tube and said extension.
Claim 8
Dependent Claim
24 words
The combination defined in claim 4 wherein said means for exerting a downward force on said packing comprises a nut threaded on said tube.
Claim 9
Dependent Claim
70 words
The combination defined in claim 6 wherein said tube is of smaller diameter than the interior of said overflow pipe to provide an annular space therebetween, and a tubular tool insertable downwardly through said annular space and having a polygonal socket formed in its lower end to engage said nut whereby rotation of said tube will move said nut downwardly to exert said force against said packing to deform it.
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) | 1975-10-10 | 1976-04-10 | 1976-10-10 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-10-10 | 1980-04-10 | 1980-10-10 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-10-10 | 1984-04-10 | 1984-10-10 | $7700.00 | Window Closed / Lapsed |