Patent US3598275A successfully refreshed from Google Patents.
US3598275A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Radial-filament cylinders
Assignee: UNIROYAL PLASTICS COMPANY Inc WORLD HEADQUARTERS MIDDLEBURY CT 06749 A CORP OF
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Filing: 1969-05-21
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Granted: 1971-08-10
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Expires: 1989-05-21
Abstract
Abstract Hollow cylindrical bodies, the walls of which include a shell construction made of resin reinforced by short length, high modulus filaments extending substantially normal to the inner and outer shell surfaces, i.e. generally radially, are disclosed. The body wall may be composed of a single such shell reinforced by internal coaxial stiffening rings distributed along its length, or it may be composed of a sandwich structure consisting of a pair of identically constructed concentric shells with a low density core confined therebetween. Such bodies, when closed at their opposite ends by means of end caps, are particularly suited for use as deep submergence vessels, being characterized by high resistance to external hydrostatic pressures, a low weight-todisplacement ratio, and high compressive strength and elastic stability. Various methods of constructing such bodies are also disclosed.
Inventors
- 👤 Edgar Francois
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-06 14:50
CPC Classifications
B; B63; B63B; B63B3/00; B63B3/13; B63B5/00; B63B5/24; B63B2005/242; Y; Y10; Y10S; Y10S220/00; Y10S220/902; Y10T; Y10T428/00; Y10T428/13; Y10T428/131; Y10T428/1314; Y10T428/1352; Y10T428/1372; Y10T428/24; Y10T428/24058; Y10T428/24124; Y10T428/24273
Claims Analysis
Total Claims: 11
Claim 1
Independent Claim
84 words
A generally cylindrical, hollow shell-type body, the wall structure of said body comprising a pair of cylindrical shells made of resin reinforced by short length filaments, the individual filament lengths in each shell extending substantially normal to the inner and outer surfaces of that shell, the two shells being of different diameters and being located one concentrically within the other and coextensive therewith, and a rigid, low density core of polymeric material occupying the annular space between said shells over the entire length thereof.
Claim 2
Dependent Claim
84 words
A generally cylindrical, hollow shell-type body, the wall structure of said body comprising a pair of cylindrical shells made of resin reinforced by short length filaments, the individual filament lengths in each shell extending substantially normal to the inner and outer surfaces of that shell, the two shells being of different diameters and being located one concentrically within the other and coextensive therewith, and a rigid, low density core of polymeric material occupying the annular space between said shells over the entire length thereof.
Claim 3
Dependent Claim
24 words
A body according to claim 1, said individual filament lengths in each shell extending from the inner to the outer surface of that shell.
Claim 4
Dependent Claim
13 words
A body according to claim 1, said core being made of syntactic foam.
Claim 5
Dependent Claim
16 words
A body according to claim 1, said core being provIded with a plurality of holes therein.
Claim 6
Dependent Claim
40 words
A body according to claim 1, said core being provided with a plurality of circumferential holes therein, imparting to said core the form of a plurality of coaxial rings spaced from one another along the common axis of said shell.
Claim 7
Dependent Claim
38 words
A body according to claim 1, further comprising a pair of end caps secured to the opposite ends of said shell, thereby to make said body a closed deep submergence vessel capable of withstanding high external hydrostatic pressure.
Claim 8
Dependent Claim
80 words
A body according to claim 6, the wall structure of each of said end caps comprising a pair of concentric hemispherical shells each made of resin reinforced by short length filaments, the individual filament lengths in each end cap shell extending substantially normal to the inner and outer surfaces of that end cap shell, and a respective, rigid, low density core of polymeric material occupying the space between each pair of said end cap shells over the entire expanse thereof.
Claim 9
Dependent Claim
19 words
A body according to claim 7, said core in each of said end caps being made of syntactic foam.
Claim 10
Dependent Claim
81 words
A body according to claim 6, the wall structure of each of said end caps comprising a pair of concentric prolate spheroidlike shells each made of resin reinforced by short length filaments, the individual filament lengths in each end cap shell extending substantially normal to the inner and outer surfaces of that end cap shell, and a respective, rigid, low density core of polymeric material occupying the space between each pair of said end cap shells over the entire expanse thereof.
Claim 11
Dependent Claim
19 words
A body according to claim 9, said core in each of said end caps being made of syntactic foam.
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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) | 1974-08-09 | 1975-02-08 | 1975-08-10 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-08-09 | 1979-02-08 | 1979-08-10 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-08-09 | 1983-02-08 | 1983-08-10 | $7700.00 | Window Closed / Lapsed |