US4133563A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Pipe joint
Assignee: Individual
•
Filing: 1977-02-07
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Granted: 1979-01-09
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Expires: 1997-02-07
Abstract
Abstract A pipe joint having a socket provided with an annular groove for receiving a rubber ring seal, the internal surface of the socket having two conic parts axially diverging from the circumferential edges of the annular groove to the opposite directions along two conic surfaces with an identical vertical angle, respectively.
Inventors
- 👤 Sadayoshi Yamazaki
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 23:36
CPC Classifications
F; F16; F16L; F16L27/00; F16L27/10; F16L27/1017; F16L21/00; F16L21/02; F16L21/03
Claims Analysis
Total Claims: 3
Claim 1
Independent Claim
205 words
a pipe joint having a one-piece socket assembly provided with an annular groove for receiving a rubber ring seal, the internal surface of said socket comprising tow conic parts which axially diverge from the circumferential edges of said groove to the opposite directions along two conic surfaces with identical vertical angles, respectively, such that said two conic parts formed along said two conic surfaces, respectively, pass through a circle having a larger diameter than a pipe to be inserted and imaginarily provided on a section taken along the outside circumferential edge of said groove with its center on the axis of said socket and which have vertexes with identical vertical angles on the axis of the socket at the opposite sides of said section and diverge from the circumferential edges of said groove inwardly and outwardly, respectively, wherein said vertical angle is 2θ° and has the following relationship when the inclination of said pipe to be inserted is assumed to be θ°: D = d/cosθ° wherein D is the inside diameter of the socket at the section taken along the outside circumferential edge of the groove and d is the outside diameter of the pipe to be inserted and wherein θ° is greater than 4°.
Claim 2
Dependent Claim
205 words
a pipe joint having a one-piece socket assembly provided with an annular groove for receiving a rubber ring seal, the internal surface of said socket comprising tow conic parts which axially diverge from the circumferential edges of said groove to the opposite directions along two conic surfaces with identical vertical angles, respectively, such that said two conic parts formed along said two conic surfaces, respectively, pass through a circle having a larger diameter than a pipe to be inserted and imaginarily provided on a section taken along the outside circumferential edge of said groove with its center on the axis of said socket and which have vertexes with identical vertical angles on the axis of the socket at the opposite sides of said section and diverge from the circumferential edges of said groove inwardly and outwardly, respectively, wherein said vertical angle is 2θ° and has the following relationship when the inclination of said pipe to be inserted is assumed to be θ°: D = d/cosθ° wherein D is the inside diameter of the socket at the section taken along the outside circumferential edge of the groove and d is the outside diameter of the pipe to be inserted and wherein θ° is greater than 4°.
Claim 3
Dependent Claim
15 words
A pipe joint as set forth in claim 1, wherein θ° is greater than 5°.
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) | 1982-01-08 | 1982-07-10 | 1983-01-09 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1986-01-08 | 1986-07-10 | 1987-01-09 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1990-01-08 | 1990-07-10 | 1991-01-09 | $7700.00 | Window Closed / Lapsed |