Patent US3751004A successfully refreshed from Google Patents.
US3751004A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Flanged body with flange reinforcing ribs
Assignee: Rheem Fluid Systems Inc
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Filing: 1971-12-17
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Granted: 1973-08-07
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Expires: 1991-12-17
Abstract
Abstract A so-called filament wound article having an annular flange and a longitudinal rib buttressing the flange. The latter comprises one or more synthetic resin impregnated, helical windings of fiber glass roving, tape, or the like. Rib reinforcing elements of similar materials are embedded in and extend lengthwise of the rib and have ends interspersed with and entangled with the flange reinforcing windings. Thus, the reinforcing elements of the rib and the flange are mechanically interlocked for increased strength.
Inventors
- 👤 R Quirk
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 12:56
CPC Classifications
B; B29; B29D; B29D23/00; B29D23/001; B29D23/003; B29D23/008; F; F16; F16K; F16K27/00; B29C; B29C53/00; B29C53/56; B29K; B29K2105/00; B29K2105/06; B29K2105/08; B29K2105/20; B29L; B29L2031/00; B29L2031/748; B29L2031/7506
Claims Analysis
Total Claims: 3
Claim 1
Independent Claim
23 words
An article as defined in claim 1 wherein said flange is annular and said flange reinforcing strands comprise convolutions of a helicaL winding.
Claim 2
Dependent Claim
75 words
In an article having spaced flanges with reinforcing ribs buttressing said flanges, the combination of: flange reinforcing elements in each of said flanges and comprising fibrous strands embedded in and extending lengthwise of the flange; and rib reinforcing elements for each of said ribs and comprising fibrous strands embedded in and extending lengthwise of the rib and having ends projecting beyond said rib and interspersed with the flange reinforcing strands of each of said flanges.
Claim 3
Independent Claim
67 words
A method of making an article having an annular flange and a flange reinforcing rib buttressing said flange, including the steps of: a. positioning rib reinforcing elements longitudinally of a mandrel; b. winding a flange reinforcing element around the mandrel adjacent said rib reinforcing elements; and c. periodically interspersing ends of one or more of said rib reinforcing elements with the convolutions of said flange reinforcing element.
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1976-08-06 | 1977-02-05 | 1977-08-07 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-08-06 | 1981-02-05 | 1981-08-07 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-08-06 | 1985-02-05 | 1985-08-07 | $7700.00 | Window Closed / Lapsed |