Patent US3744806A successfully refreshed from Google Patents.
US3744806A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Pipe joint seal
Assignee: Price Brothers Co
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Filing: 1971-11-22
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Granted: 1973-07-10
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Expires: 1991-11-22
Abstract
Abstract A joint between a manhole riser and a pipe feeding into the manhole includes a resilient gasket embedded in the riser and projecting radially into the opening through the wall of the riser to provide a seal against the outer surface of the intersecting pipe. Wire hoops are received in continuous grooves in the gasket to both stretch it outwardly and resist rolling of the gasket as the intersecting pipe is installed. Additionally, the opening through the riser wall includes an annular, inwardly projecting shoulder designed to support the intersecting pipe should the pipe shift with the respect to the riser, to thereby avoid the loss of seal that would result if the gasket itself supported the entire shear load.
Inventors
- 👤 L Keyser
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-07 18:20
CPC Classifications
F; F16; F16L; F16L41/00; F16L41/002; E; E03; E03F; E03F5/00; E03F5/02; E03F5/021; F16L21/00; F16L21/02; F16L21/03; F16L41/08; F16L41/088; F16L5/00; F16L5/02; F16L5/025; F16L5/10
Claims Analysis
Total Claims: 8
Claim 1
Independent Claim
126 words
An integrally formed resilient gasket comprising: a. a substantially triangular main section, b. a first apex of said substantially triangular main section defining a sealing portion of said resilient gasket, c. an outer lip extending from a second apex of said main section, d. said outer lip and an outer face of said main section extending between said first and second apexes defining a first groove, e. an inner lip extending from a third apex of said main section, f. said inner lip and an inner face of said main section extending between said first and third apexes defining a second groove, and g. an anchoring lip projecting from said second apex in a direction substantially opposite to the direction of projection of said outer lip.
Claim 2
Dependent Claim
126 words
An integrally formed resilient gasket comprising: a. a substantially triangular main section, b. a first apex of said substantially triangular main section defining a sealing portion of said resilient gasket, c. an outer lip extending from a second apex of said main section, d. said outer lip and an outer face of said main section extending between said first and second apexes defining a first groove, e. an inner lip extending from a third apex of said main section, f. said inner lip and an inner face of said main section extending between said first and third apexes defining a second groove, and g. an anchoring lip projecting from said second apex in a direction substantially opposite to the direction of projection of said outer lip.
Claim 3
Dependent Claim
26 words
The gasket of claim 1 wherein: a. said outer face of said substantially triangular main section is substantially convex at a point adjacent said first apex.
Claim 4
Dependent Claim
29 words
The gasket of claim 1 wherein: a. said anchoring lip includes a substantially flat face extending from a face of said main section interconnecting said second and third apexes.
Claim 5
Dependent Claim
17 words
The gasket of claim 1 wherein: a. said gasket is in the form of an endless belt.
Claim 6
Dependent Claim
18 words
The gasket of claim 4 further comprising: a. relatively rigid reinforcing means received in one of said grooves.
Claim 7
Dependent Claim
18 words
The gasket of claim 4 further comprising: a. relatively rigid reinforcing means received in each of said grooves.
Claim 8
Dependent Claim
27 words
The gasket of claim 6 wherein: a. said reinforcing means comprise endless wire hoops received in said grooves, b. said gasket being stretched to receive said hoops.
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) | 1976-07-09 | 1977-01-08 | 1977-07-10 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-07-09 | 1981-01-08 | 1981-07-10 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-07-09 | 1985-01-08 | 1985-07-10 | $7700.00 | Window Closed / Lapsed |