US3648729A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Check valve
Assignee: Individual
•
Filing: 1970-04-24
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Granted: 1972-03-14
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Expires: 1990-04-24
Abstract
Abstract A ready-to-use valve assembly comprising three component parts, namely, a gasket ring having a valve seat, a ball check valve associatively cooperative with the seat and ring, and a coil spring carried by the ring and guidingly encaging the valve. This assembly when installed in standard T-coupling converts the same into a check valve for acceptable use in a new piping system or, alternatively, an equivalent existing system. It permits flow or fluid in one direction and prevents back-flow. Accordingly, the coupling serves not only to unite adjacent pipe sections but also serves as a check valve.
Inventors
- 👤 John W Balkany
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 08:05
CPC Classifications
F; F16; F16K; F16K15/00; F16K15/02; F16K15/04; F16K15/044; Y; Y10; Y10T; Y10T137/00; Y10T137/7722; Y10T137/7837; Y10T137/7904; Y10T137/7908; Y10T137/7909; Y10T137/791; Y10T137/7911; Y10T137/7912; Y10T137/9029
Claims Analysis
Total Claims: 5
Claim 1
Independent Claim
269 words
A fluid handling and circulating pipeline comprising, in combination, a pair of companion fluid conducting pipe sections having external screw-threaded ends disposed at right angles relative to each other, a conventional type T-coupling having axially aligned open internally screw-threaded opposite ends and a lateral screw-threaded branch on one side, the screw-threaded end of one pipe section being screwed into one open screwthreaded end of the body of said T-coupling, the screw-threaded end of the other pipe section being screwed into the lateral screw-threaded branch on said one side of said coupling, a prefabricated ready-to-install valving unit fitted into the body portion of said coupling and embodying a gasket ring which is seated on an end of said one pipe section, said gasket ring having an inner peripheral surface provided with an annulus whose inner periphery is provided with a truncated conical surface constituting a valve seat, a ball check valve proportional in size and associatively cooperable with said seat and partially nested within the confines of the truncated conical valve seat, a normally distended coil spring fitted within the confines of the body portion of said coupling and having a lower end coil retentively keyed into a groove provided therefor in the inner peripheral surface of said gasket ring, said coil spring enclosing and encaging said ball valve, and a pipe plug having a screw-threaded portion screwed into the screw threads provided therefor in an upper end of said coupling and having an accessible integral plug applying and removing nut, an upper convolution of said coil spring having end thrust engagement with a coacting surface of said pipe plug.
Claim 2
Dependent Claim
269 words
A fluid handling and circulating pipeline comprising, in combination, a pair of companion fluid conducting pipe sections having external screw-threaded ends disposed at right angles relative to each other, a conventional type T-coupling having axially aligned open internally screw-threaded opposite ends and a lateral screw-threaded branch on one side, the screw-threaded end of one pipe section being screwed into one open screwthreaded end of the body of said T-coupling, the screw-threaded end of the other pipe section being screwed into the lateral screw-threaded branch on said one side of said coupling, a prefabricated ready-to-install valving unit fitted into the body portion of said coupling and embodying a gasket ring which is seated on an end of said one pipe section, said gasket ring having an inner peripheral surface provided with an annulus whose inner periphery is provided with a truncated conical surface constituting a valve seat, a ball check valve proportional in size and associatively cooperable with said seat and partially nested within the confines of the truncated conical valve seat, a normally distended coil spring fitted within the confines of the body portion of said coupling and having a lower end coil retentively keyed into a groove provided therefor in the inner peripheral surface of said gasket ring, said coil spring enclosing and encaging said ball valve, and a pipe plug having a screw-threaded portion screwed into the screw threads provided therefor in an upper end of said coupling and having an accessible integral plug applying and removing nut, an upper convolution of said coil spring having end thrust engagement with a coacting surface of said pipe plug.
Claim 3
Dependent Claim
45 words
A fluid handling and circulating pipeline defined in and according to claim 1, and wherein said gasket ring is made of compressibly resilient material, said check valve being likewise made of compressibly resilient material and being proportional in size with the aforementioned truncated conical surface.
Claim 4
Dependent Claim
153 words
For use in converting a conventional T-shaped pipe coupling into a backflow preventing check valve, a prefabricated insertable and removable valving unit comprising a compressibly resilient gasket ring having an annulus whose inner periphery is fashioned into and provides a truncated conical surface, said surface constituting a valve seat, that portion of the gasket ring above the plane of said seat being provided with a coil accommodating an anchoring groove, a compressibly resilient ball check valve proportional in size and associatively cooperable with and nested on said seat, and a normally distended coil spring of predetermined tension, length and cross-sectional dimension surrounding and encaging said ball check valve and having an assembling and retaining coil at a lower end, said coil being retentively keyed in said groove, the upper end of said coil spring having a free terminal coil which when in use is adapted to abut a relatively stationary end thrust surface.
Claim 5
Dependent Claim
153 words
For use in converting a conventional T-shaped pipe coupling into a backflow preventing check valve, a prefabricated insertable and removable valving unit comprising a compressibly resilient gasket ring having an annulus whose inner periphery is fashioned into and provides a truncated conical surface, said surface constituting a valve seat, that portion of the gasket ring above the plane of said seat being provided with a coil accommodating an anchoring groove, a compressibly resilient ball check valve proportional in size and associatively cooperable with and nested on said seat, and a normally distended coil spring of predetermined tension, length and cross-sectional dimension surrounding and encaging said ball check valve and having an assembling and retaining coil at a lower end, said coil being retentively keyed in said groove, the upper end of said coil spring having a free terminal coil which when in use is adapted to abut a relatively stationary end thrust surface.
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) | 1975-03-14 | 1975-09-13 | 1976-03-14 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-03-14 | 1979-09-13 | 1980-03-14 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-03-14 | 1983-09-13 | 1984-03-14 | $7700.00 | Window Closed / Lapsed |