US3925838A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Inflatable life preserver
Assignee: Individual
•
Filing: 1974-12-06
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Granted: 1975-12-16
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Expires: 1994-12-06
Abstract
Abstract An inflatable life preserver collar having a toroidal, tubular core forming a closed chamber and a coaxial, inflatable membrane forming an annular closed chamber outside the core. A passage leading from the chamber of the core to the chamber of the membrane has a valve which is openable by pulling apart the two ends of the core which are fastened together to form the collar allowing pressurized gas which is sealed in the core chamber to escape and inflate the membrane.
Inventors
- 👤 Patrick Hayes Kennedy
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 03:54
CPC Classifications
B; B63; B63C; B63C9/00; B63C9/08; B63C9/13; B63C9/15; B63C9/155
Claims Analysis
Total Claims: 11
Claim 1
Independent Claim
87 words
An inflatable life pReserver collar comprising: a toroidal, tubular core of pressure resistant material forming a first closed chamber; a first inflatable tubular membrane mounted coaxially on the core and forming a second, annular closed chamber about the core; passage means connecting the first chamber and the second chamber; valve means located in the passage means; and means, actuable on the application of axial force to the collar, to open the valve means for the passage of pressurized gas from the first chamber into the second chamber.
Claim 2
Dependent Claim
87 words
An inflatable life pReserver collar comprising: a toroidal, tubular core of pressure resistant material forming a first closed chamber; a first inflatable tubular membrane mounted coaxially on the core and forming a second, annular closed chamber about the core; passage means connecting the first chamber and the second chamber; valve means located in the passage means; and means, actuable on the application of axial force to the collar, to open the valve means for the passage of pressurized gas from the first chamber into the second chamber.
Claim 3
Dependent Claim
35 words
A life preserver as claimed in claim 1 including a second tubular membrane mounted coaxially on the core and forming a third, annular closed chamber about the core to contain a gas of detectable odour.
Claim 4
Dependent Claim
27 words
A life preserver as claimed in claim 1 in which the core has a pair of spaced ends interconnected by said passage means and said actuable means.
Claim 5
Dependent Claim
105 words
A life preserver as claimed in claim 3 in which said passage means comprises a housing projecting from one end of the core, a passage in the housing leading from the first chamber, at least one aperture opening laterally from the passage into the second chamber, said valve means comprising a valve located in the passage between the first chamber and the lateral aperture, said actuable means comprising barrel means projecting from the other end of the core into the housing and engageable therewith, said barrel means carrying means constructed and arranged to open the valve on the application of axial force to the collar.
Claim 6
Dependent Claim
55 words
A life preserver as claimed in claim 3 in which the valve carries a stem coaxial with the passage, and the valve opening means comprises a plunger located in the barrel means coaxial with the stem, the plunger being actuable to strike the stem and open the valve on the application of said axial force.
Claim 7
Dependent Claim
97 words
A life preserver as claimed in claim 4 in which the passage includes a shoulder, the barrel means having a detent bearing against the shoulder and against the plunger, the plunger being held by first compressive means against the detent, the barrel means being held by second compressive means against the shoulder, whereby on the application of said axial force the barrel means is moved against the action of the second compressive means to release the detent from the shoulder thereby releasing the plunger to strike the valve stem under the action of the first compressive means.
Claim 8
Dependent Claim
27 words
A life preserver as claimed in claim 5 in which the free end of the housing carries a removable cap against which the first compressive means bears.
Claim 9
Dependent Claim
25 words
A life preserver as claimed in claim 3 in which the actuable means includes means to uncouple and re-couple the spaced ends of the core.
Claim 10
Dependent Claim
27 words
A life preserver as claimed in claim 4 in which the barrel means is releasably engagable in a boss carried by the other end of the core.
Claim 11
Dependent Claim
34 words
A life preserver as claimed in claim 9 in which a pin is receivable in bores aligned in the barrel and in the boss, the pin being urged into the bores by spring means.
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) | 1978-12-15 | 1979-06-16 | 1979-12-16 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1982-12-15 | 1983-06-16 | 1983-12-16 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1986-12-15 | 1987-06-16 | 1987-12-16 | $7700.00 | Window Closed / Lapsed |