US3656771A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Flexible seal assembly for spigot and bell conduit joint
Assignee: IRRIGATION ACCESSORIES CO
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Filing: 1970-12-11
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Granted: 1972-04-18
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Expires: 1990-12-11
Abstract
Abstract A resilient sealing sleeve has one portion inserted in the end of the spigot member and the remaining portion, of larger outer diameter, extending into the bell portion of the joint. The interior wall of the sleeve has an annular recess to accommodate an annular pressure member which keeps the two portions of the sleeve pressed outwardly against the spigot and bell members respectively. The shoulder on the sleeve between the smaller and larger outer diameter portions is slotted to act as an air seal upon the development of vacuum within the conduit.
Inventors
- 👤 John C Stout
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 22:31
CPC Classifications
F; F16; F16L; F16L21/00; F16L21/02; F16L21/035; F16L21/022
Claims Analysis
Total Claims: 7
Claim 1
Independent Claim
145 words
In a conduit joint of the character described consisting of a spigot member and a bell member encompassing the end of the spigot member, a sealing assembly including a resilient, flexible sleeve extending from the interior of the spigot member into the bell member, the first portion of said sleeve being of smaller outer diameter than the remaining second portion of said sleeve to enable said first portion to fit snugly in said spigot member and to enable said second and larger diameter portion to fit snugly in said bell member when the conduit joint is put together, the inside wall of said sleeve having a recess and an internal member in said recess extending annularly around on the interior of said sleeve and exerting outward pressure on said first and said second portions of said sleeve against said spigot and said bell members respectively.
Claim 2
Dependent Claim
145 words
In a conduit joint of the character described consisting of a spigot member and a bell member encompassing the end of the spigot member, a sealing assembly including a resilient, flexible sleeve extending from the interior of the spigot member into the bell member, the first portion of said sleeve being of smaller outer diameter than the remaining second portion of said sleeve to enable said first portion to fit snugly in said spigot member and to enable said second and larger diameter portion to fit snugly in said bell member when the conduit joint is put together, the inside wall of said sleeve having a recess and an internal member in said recess extending annularly around on the interior of said sleeve and exerting outward pressure on said first and said second portions of said sleeve against said spigot and said bell members respectively.
Claim 3
Dependent Claim
23 words
The sealing assembly of claim 1 with said internal member consisting of a solid, cylindrical band pressed into said recess in said sleeve.
Claim 4
Dependent Claim
78 words
The sealing assembly of claim 2 with said recess extending in from the end of said sleeve in said bell member and terminating near the opposite end of said sleeve in said spigot member and an annular internal ridge in said opposite end of said sleeve at the termination of said cylindrical band, the radial thickness of said ridge corresponding approximately to the radial thickness of said cylindrical band, and with the ends of said sleeve beveled outwardly.
Claim 5
Dependent Claim
47 words
The sealing assembly of claim 1 with a shoulder on the outer wall of said sleeve between said first and said second mentioned portions, and with the outer diameter of said first mentioned portion increasing slightly from said shoulder to the termination of said first mentioned portion.
Claim 6
Dependent Claim
51 words
The sealing assembly of claim 1 with the outer diameter of said second portion of said sleeve decreasing slightly from each end of said second portion of said sleeve to the middle of said second portion to form a somewhat concave annular outer surface on said second portion of said sleeve.
Claim 7
Dependent Claim
79 words
The sealing assembly of claim 1 with a shoulder on the outer wall of said sleeve between said first and said second mentioned portIons, and with said shoulder provided with a slot having a top lip for increasing the sealing pressure of said sleeve against said bell member in the event of increased external air pressure being exerted against said shoulder as the result of suction developing in the conduit and tending to draw air into the conduit joint.
References Cited (Backward Citations)
US2403364A
Cited
US2719348A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1975-04-18 | 1975-10-18 | 1976-04-18 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-04-18 | 1979-10-18 | 1980-04-18 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-04-18 | 1983-10-18 | 1984-04-18 | $7700.00 | Window Closed / Lapsed |