Patent US3752347A successfully refreshed from Google Patents.
US3752347A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Closure for lined vacuum bottle
Assignee: THERMOS Co A CORP OF
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Filing: 1971-02-02
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Granted: 1973-08-14
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Expires: 1991-02-02
Abstract
Abstract A vacuum bottle incorporating a liner for protecting the glass vacuum filler. A closure construction is used in which the stopper and liner have cooperating sealing surfaces that are disposed at an angled relationship to each other. At least one of the angled sealing surfaces is flexible for deformation upon the exertion of a sealing pressure to establish and maintain a good seal.
Inventors
- 👤 V Bell
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-06 09:32
CPC Classifications
A; A47; A47J; A47J41/00; A47J41/0005; A47J41/0011
Claims Analysis
Total Claims: 3
Claim 1
Independent Claim
189 words
A vacuum bottle comprising an evacuated filler wall defining a cavity, a liner member open at one end having a main portion positioned in said filler cavity and spaced from the wall thereof defining a cavity adapted to contain a liquid or tHe like, a threaded portion on said liner adjacent its open end, and a sealing portion interconnecting said threaded portion and said main portion and providing a cantilevered joint therebetween free to deflect relative to said threaded portion, said sealing portion defining a frusto-conical sealing surface, and a closure member for closing said liner member cavity, said closure member being formed with threads complementary to and engaged with said threaded portion of said liner and a frusto-conical sealing surface adapted to cooperate with said liner sealing surface, said sealing surface of said closure member being disposed at an angle to the axis of the filler cavity that is different from the angle which said sealing surface of the liner makes with said filler axis for effecting cantilevered deflection of said liner sealing portion upon threading of said closure member to said liner for improving the seal therebetween.
Claim 2
Dependent Claim
189 words
A vacuum bottle comprising an evacuated filler wall defining a cavity, a liner member open at one end having a main portion positioned in said filler cavity and spaced from the wall thereof defining a cavity adapted to contain a liquid or tHe like, a threaded portion on said liner adjacent its open end, and a sealing portion interconnecting said threaded portion and said main portion and providing a cantilevered joint therebetween free to deflect relative to said threaded portion, said sealing portion defining a frusto-conical sealing surface, and a closure member for closing said liner member cavity, said closure member being formed with threads complementary to and engaged with said threaded portion of said liner and a frusto-conical sealing surface adapted to cooperate with said liner sealing surface, said sealing surface of said closure member being disposed at an angle to the axis of the filler cavity that is different from the angle which said sealing surface of the liner makes with said filler axis for effecting cantilevered deflection of said liner sealing portion upon threading of said closure member to said liner for improving the seal therebetween.
Claim 3
Dependent Claim
29 words
A vacuum bottle as set forth in claim 1 wherein the threaded portion of the liner member comprises internal threads which are positioned in the cavity of the filler.
References Cited (Backward Citations)
CA681798A
Cited
US2467979A
Cited
US2770260A
Cited
US3082895A
Cited
US3191790A
Cited
GB1016815A
Cited
US3424481A
Cited
US3476277A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1976-08-13 | 1977-02-12 | 1977-08-14 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-08-13 | 1981-02-12 | 1981-08-14 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-08-13 | 1985-02-12 | 1985-08-14 | $7700.00 | Window Closed / Lapsed |