US3887104A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Sealed gas tank
Assignee: Individual
•
Filing: 1970-10-07
•
Granted: 1975-06-03
•
Expires: 1990-10-07
Abstract
Abstract A sealed gas tank comprising a flexible container which opens up and collapses as the amount of liquid contained therein is increased and decreased, and a collapsible expansion chamber associated with the flexible container which may be collapsed by a spring during filling of the tank. Afterwards, the spring is released to provide additional space in the expansion chamber for expansion of the liquid when the tank is full.
Inventors
- 👤 David F Cole
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 07:29
CPC Classifications
B; B60; B60K; B60K15/00; B60K15/03; B60K15/077; B60K2015/03236
Claims Analysis
Total Claims: 5
Claim 1
Independent Claim
105 words
A sealed tank for gas and other volatile liquids comprising a flexible container which expands and collapses during liquid filling and removal to accommodate the liquid contained therein, a fill pipe connected to said container through which said container is filled, a cap for sealing said fill pipe, a liquid discharge line connected to said container, a collapsible expansion chamber connected to said container providing additional space for expansion of the liquid within said container, and spring means pressing against said expansion chamber for collapsing said expansion chamber during filling of said container to prevent entrapment of air and gas vapors in said expansion chamber.
Claim 2
Dependent Claim
105 words
A sealed tank for gas and other volatile liquids comprising a flexible container which expands and collapses during liquid filling and removal to accommodate the liquid contained therein, a fill pipe connected to said container through which said container is filled, a cap for sealing said fill pipe, a liquid discharge line connected to said container, a collapsible expansion chamber connected to said container providing additional space for expansion of the liquid within said container, and spring means pressing against said expansion chamber for collapsing said expansion chamber during filling of said container to prevent entrapment of air and gas vapors in said expansion chamber.
Claim 3
Dependent Claim
105 words
A sealed tank for gas and other volatile liquids comprising a flexible container which expands and collapses during liquid filling and removal to accommodate the liquid contained therein, a fill pipe connected to said container through which said container is filled, a cap for sealing said fill pipe, a liquid discharge line connected to said container, a collapsible expansion chamber connected to said container providing additional space for expansion of the liquid within said container, and spring means pressing against said expansion chamber for collapsing said expansion chamber during filling of said container to prevent entrapment of air and gas vapors in said expansion chamber.
Claim 4
Dependent Claim
105 words
A sealed tank for gas and other volatile liquids comprising a flexible container which expands and collapses during liquid filling and removal to accommodate the liquid contained therein, a fill pipe connected to said container through which said container is filled, a cap for sealing said fill pipe, a liquid discharge line connected to said container, a collapsible expansion chamber connected to said container providing additional space for expansion of the liquid within said container, and spring means pressing against said expansion chamber for collapsing said expansion chamber during filling of said container to prevent entrapment of air and gas vapors in said expansion chamber.
Claim 5
Dependent Claim
26 words
The tank of claim 1 further comprising means for releasing the spring after filling of said container and sealing of said fill pipe by said cap.
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) | 1978-06-02 | 1978-12-02 | 1979-06-03 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1982-06-02 | 1982-12-02 | 1983-06-03 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1986-06-02 | 1986-12-02 | 1987-06-03 | $7700.00 | Window Closed / Lapsed |