US4049152A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Closure caps for vessels
Assignee: Makap Ltd
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Filing: 1976-01-09
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Granted: 1977-09-20
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Expires: 1996-01-09
Abstract
Abstract A closure cap is provided for an opening in a vessel. Inner and outer seatings extend around the opening. The closure cap has a body with attachment means to enable the cap to be releasably secured in the opening, and the body also has an inner seal for engaging the inner seating and an outer seal for engaging the outer seating. The cap is characterized by the fact that at least one of those seals comprises an outwardly directed flange of a flexible and resilient plastics material supported at its inner edge and yielding resiliently when in use. The flange is urged towards the associated seating due, at least in part, to the innate resilience of the material from which it is made.
Inventors
- 👤 Eugene Joseph Treanor
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 11:55
CPC Classifications
F; F01; F01P; F01P11/00; F01P11/02; F01P11/0204; F01P11/0209; F01P11/0247; F01P11/0238; F01P2011/0252
Claims Analysis
Total Claims: 14
Claim 1
Independent Claim
211 words
A closure cap for insertion into an opening in a vessel, comprising an attachment component with attachment means operative to enable the cap to be releasably secured in the opening and a sealing component separately formed from the attachment component, said sealing component being of a flexible and resilient plastics material formed as a unitary whole and comprising a support and including an inner seal integral with said support for engagement with an inner seating around the opening and an outer seal integral with said support for engagement with an outer seating around the opening, at least one of said seals comprising an outwardly directed flange integrally supported at its inner edge by the support and capable of yielding resiliently when it engages its associated seating so that the flange is urged towards the seating due at least in part to the innate resilience of the material, said closure cap having a duct leading from a space inwardly of the inner seal and communicating with a space outward of at least the inner seal, and a valve for closing the duct and comprising a valve member integral with the sealing component and openable in use in response to a pressure differential across the valve, the higher pressure being in the duct.
Claim 2
Dependent Claim
211 words
A closure cap for insertion into an opening in a vessel, comprising an attachment component with attachment means operative to enable the cap to be releasably secured in the opening and a sealing component separately formed from the attachment component, said sealing component being of a flexible and resilient plastics material formed as a unitary whole and comprising a support and including an inner seal integral with said support for engagement with an inner seating around the opening and an outer seal integral with said support for engagement with an outer seating around the opening, at least one of said seals comprising an outwardly directed flange integrally supported at its inner edge by the support and capable of yielding resiliently when it engages its associated seating so that the flange is urged towards the seating due at least in part to the innate resilience of the material, said closure cap having a duct leading from a space inwardly of the inner seal and communicating with a space outward of at least the inner seal, and a valve for closing the duct and comprising a valve member integral with the sealing component and openable in use in response to a pressure differential across the valve, the higher pressure being in the duct.
Claim 3
Dependent Claim
34 words
A closure cap according to claim 1 in which there is an area of reduced thickness adjacent to the inner edge of said flange where the main flexure of the flange occurs in use.
Claim 4
Dependent Claim
21 words
A closure cap according to claim 1 in which said flange is provided with sealing material for engaging the associated seating.
Claim 5
Dependent Claim
40 words
A closure cap according to claim 1 in which the attachment means is such as to be engageable and releasable by rotational movement of the attachment component, and in which the attachment component is rotatable relatively to the sealing component.
Claim 6
Dependent Claim
55 words
A closure cap according to claim 4 in which the sealing component has an axial hole into which projects a spigot on the attachment component, one of the two being formed with a circular groove and the other with at least one projection for snap-engagement in the groove while permitting relative rotation between the components.
Claim 7
Dependent Claim
19 words
A closure cap according to claim 1 in which the attachment component is in snap-engagement with the sealing component.
Claim 8
Dependent Claim
77 words
A closure cap according to claim 6 in which the valve member is connected to the remainder of the sealing component by a plurality of flexible and resilient links spaced around the valve member and constituting integral parts of the sealing component, the links being operative to hold the valve member in its closed position but to yield in response to said pressure differential so as to permit the valve member to move to its open position.
Claim 9
Dependent Claim
30 words
A closure cap according to claim 7 in which there is a valve seat formed on the attachment component and engaged by the valve member when the valve is closed.
Claim 10
Dependent Claim
51 words
A closure cap according to claim 8 in which the duct extends from the valve, through at least one opening in the attachment component, through an annular gap between the attachment component and the support and through at least one opening in the support issuing between the inner and outer seals.
Claim 11
Dependent Claim
18 words
A closure cap according to claim 7 in which the valve is manually operable from outside the cap.
Claim 12
Dependent Claim
71 words
A closure cap according to claim 10 in which the sealing component is tubular and a valve-operating member entends lengthwise of the sealing component and can be manipulated to open the valve, the valve-operating member is formed separately from the attachment component and projects through an aperture in the attachment component, and the valve-operating member is formed with integral spring means operative to urge the valve member to its closed position.
Claim 13
Dependent Claim
19 words
A closure cap according to claim 10 in which there is spring means operative to assist the inner seal.
Claim 14
Dependent Claim
36 words
A closure cap according to claim 1 in combination with a vessel having an opening, an inner seating and an outer seating around that opening and attachment formations operative for releasable engagement by the attachment 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) | 1980-09-19 | 1981-03-21 | 1981-09-20 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1984-09-19 | 1985-03-21 | 1985-09-20 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1988-09-19 | 1989-03-21 | 1989-09-20 | $7700.00 | Window Closed / Lapsed |