Patent US3815641A successfully refreshed from Google Patents.
US3815641A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Concrete pipe with splayed socket
Assignee: Rocla Concrete Pipes Ltd
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Filing: 1972-07-06
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Granted: 1974-06-11
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Expires: 1992-07-06
Abstract
Abstract A concrete pipe for laying in bend of a pipe line. The pipe is of straight cylindrical, spigot and socket type. The socket is deliberately splayed so that socket axis is inclined at acute angle to longitudinal pipe axis to enable strong joint between successive pipes laid at angle to one another.
Inventors
- 👤 C Simpson
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 16:25
CPC Classifications
F; F16; F16L; F16L21/00; F16L21/02; F16L21/03; F16L21/025; F16L25/00; F16L25/0027; F16L43/00; F16L43/007; F16L9/00; F16L9/08
Claims Analysis
Total Claims: 6
Claim 1
Independent Claim
118 words
A straight cylindrical concrete pipe having a main cylindrical part disposed about a longitudinal pipe axis, a spigot end and a socket end to receive the spigot end of an adjacent similar pipe, wherein the spigot end of the pipe is cylindrical and is disposed about the longitudinal pipe axis, the pipe wall is thickened at the socket end of the pipe and the socket is formed in the thickened part of the wall to have a straight cylindrical peripheral socket surface which is of slightly greater diameter than the spigot end of the pipe and is disposed about a socket axis inclined at an acute angle of at least 4* to the longitudinal axis of the pipe.
Claim 2
Dependent Claim
118 words
A straight cylindrical concrete pipe having a main cylindrical part disposed about a longitudinal pipe axis, a spigot end and a socket end to receive the spigot end of an adjacent similar pipe, wherein the spigot end of the pipe is cylindrical and is disposed about the longitudinal pipe axis, the pipe wall is thickened at the socket end of the pipe and the socket is formed in the thickened part of the wall to have a straight cylindrical peripheral socket surface which is of slightly greater diameter than the spigot end of the pipe and is disposed about a socket axis inclined at an acute angle of at least 4* to the longitudinal axis of the pipe.
Claim 3
Dependent Claim
104 words
A concrete pipe as claimed in claim 1 wherein the socket end of the pipe has a cylindrical outer periphery disposed about the longitudinal axis of the pipe which periphery is of greater diameter than the outer periphery of the main part of the pipe and meets with the main periphery at an external shoulder and the end face of the socket end of the pipe and the floor of the socket are disposed in parallel planes which are perpendicular to the socket axis and are therefore inclined to the longitudinal axis of the pipe by an angle complementary to the said acute angle.
Claim 4
Dependent Claim
158 words
A pipe assembly comprising a pair of similar concrete pipes each having a main cylindrical part defining a longitudinal pipe axis, a cylindrical spigot end disposed about the longitudinal pipe axis, a socket end at which the pipe wall is thickened, a socket formed in the thickened part of the wall to have a straight cylindrical peripheral surface which is of slightly greater diameter than the spigot end of the pipe and is disposed about a socket axis inclined at an acute angle of at least 4* to the longitudinal axis of the pipe; said pipes being arranged in end to end relation with their longitudinal axis meeting substantially at said acute angle and with the spigot end of one pipe located concentrically within the socket of the other pipe, said assembly further comprising a resilient jointing ring disposed between and compressed by the spigot end of said one pipe and the peripheral surface of the other pipe.
Claim 5
Dependent Claim
158 words
A pipe assembly comprising a pair of similar concrete pipes each having a main cylindrical part defining a longitudinal pipe axis, a cylindrical spigot end disposed about the longitudinal pipe axis, a socket end at which the pipe wall is thickened, a socket formed in the thickened part of the wall to have a straight cylindrical peripheral surface which is of slightly greater diameter than the spigot end of the pipe and is disposed about a socket axis inclined at an acute angle of at least 4* to the longitudinal axis of the pipe; said pipes being arranged in end to end relation with their longitudinal axis meeting substantially at said acute angle and with the spigot end of one pipe located concentrically within the socket of the other pipe, said assembly further comprising a resilient jointing ring disposed between and compressed by the spigot end of said one pipe and the peripheral surface of the other pipe.
Claim 6
Dependent Claim
101 words
A pipe assembly as claimed in claim 3, wherein the socket end of said other pipe has a cylindrical outer periphery disposed about a longitudinal axis of the pipe which periphery is of greater diameter than the outer periphery of the main part of that pipe and meets that main part periphery at an external shoulder and the end face of the socket end of said other pipe and floor of the socket of that pipe are disposed in parallel planes which are perpendicular to the respective socket axis and therefore to the pipe and spigot axis of said one pipe.
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) | 1977-06-10 | 1977-12-10 | 1978-06-11 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1981-06-10 | 1981-12-10 | 1982-06-11 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1985-06-10 | 1985-12-10 | 1986-06-11 | $7700.00 | Window Closed / Lapsed |