US4099641A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Pressure tank for hot-water heaters
Assignee: Stiebel Eltron GmbH and Co KG
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Filing: 1977-02-07
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Granted: 1978-07-11
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Expires: 1997-02-07
Abstract
Abstract A pressure tank, particularly for hot-water heaters, with a synthetic liner and a glass fiber wrapping reinforcing it. The glass fiber wrapping is fixed to individual positions of the liner by means of synthetic material located at these positions. At the same time, the glass fiber wrapping may be held to the liner by means of a foamed, heat-insulating synthetic layer placed around the glass fiber wrapping. The liner has stiffening caps, and the overlapping areas of the glass fiber wrapping are saturated with the synthetic material. The synthetic layer is foam-applied between a protective jacket and the wrapped liner which may have a diffusion-tight paint coating. The wrapping fibers or threads may be provided, moreover, with a water vapor diffusion-tight protective layer. The fibers may be of organic or inorganic material, and either glass fibers, glass threads or glass fiber strands may be used as the wrapping material.
Inventors
- 👤 Heinz Schiedat
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 18:53
CPC Classifications
F; F24; F24H; F24H1/00; F24H1/18; F24H1/181; B; B29; B29D; B29D22/00; F17; F17C; F17C1/00; F17C1/12; F17C1/16; B29K; B29K2105/00; B29K2105/06; B29L; B29L2031/00; B29L2031/712; B29L2031/7154; B29L2031/7156; F17C2203/00; F17C2203/06; F17C2203/0602; F17C2203/0604; F17C2203/0634; F17C2203/0658; F17C2203/066; F17C2203/0663; F17C2203/0673; F17C2205/00; F17C2205/01; F17C2205/0103; F17C2205/0111
Claims Analysis
Total Claims: 12
Claim 1
Independent Claim
44 words
A pressure tank, particularly for hot water heaters, comprising: a synthetic liner; a glass fiber wrapping reinforcing said liner; and synthetic material means only at predetermined locations of said liner for fixing said glass fiber wrapping to said liner only at said predetermined locations.
Claim 2
Dependent Claim
44 words
A pressure tank, particularly for hot water heaters, comprising: a synthetic liner; a glass fiber wrapping reinforcing said liner; and synthetic material means only at predetermined locations of said liner for fixing said glass fiber wrapping to said liner only at said predetermined locations.
Claim 3
Dependent Claim
61 words
A pressure tank, particularly for hot water heaters, comprising: a synthetic liner; a glass fiber wrapping reinforcing said liner; synthetic material means only at predetermined locations of said liner for fixing said glass fiber wrapping to said liner only at said predetermined locations; and a synthetic foamed, heat-insulating layer around said glass fiber wrapping for holding said wrapping to said liner.
Claim 4
Dependent Claim
61 words
A pressure tank, particularly for hot water heaters, comprising: a synthetic liner; a glass fiber wrapping reinforcing said liner; synthetic material means only at predetermined locations of said liner for fixing said glass fiber wrapping to said liner only at said predetermined locations; and a synthetic foamed, heat-insulating layer around said glass fiber wrapping for holding said wrapping to said liner.
Claim 5
Dependent Claim
25 words
A pressure tank as defined in claim 2 including stiffening caps on said liner, said glass fiber wrapping having over-lapping areas saturated with synthetic material.
Claim 6
Dependent Claim
25 words
A pressure tank as defined in claim 2 including a protective jacket, said synthetic layer being foam-applied between said protective jacket and said wrapped liner.
Claim 7
Dependent Claim
13 words
A pressure tank as defined in claim 2 including a diffusion-tight paint coating.
Claim 8
Dependent Claim
30 words
A pressure tank as defined in claim 2 wherein said glass fiber wrapping has fiber-shaped elements forming said wrapping; and water vapor diffusion tight layer means on said fiber-shaped elements.
Claim 9
Dependent Claim
26 words
A pressure tank as defined in claim 6 wherein said diffusion-tight layer means is hardened and applied on said fiber-shaped elements prior to forming said wrapping.
Claim 10
Dependent Claim
21 words
A pressure tank as defined in claim 2 wherein said glass fiber wrapping is formed of fiber-shaped elements of organic material.
Claim 11
Dependent Claim
20 words
A pressure tank as defined in claim 2 wherein said glass fiber wrapping has fiber-shaped elements comprised of inorganic material.
Claim 12
Dependent Claim
20 words
A pressure tank as defined in claim 2 wherein said glass fiber wrapping is formed of elongated glass fiber-shaped elements.
References Cited (Backward Citations)
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US3372075A
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US3446385A
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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) | 1981-07-10 | 1982-01-09 | 1982-07-11 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1985-07-10 | 1986-01-09 | 1986-07-11 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1989-07-10 | 1990-01-09 | 1990-07-11 | $7700.00 | Window Closed / Lapsed |