US3593870A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Closure for fluid container
Assignee: Dave Chapman Goldsmith and Yamasaki Inc
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Filing: 1969-02-03
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Granted: 1971-07-20
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Expires: 1989-02-03
Abstract
Abstract The closure for the liquid container is formed by injection molding a first layer of a hard plastic having first and second inwardly projecting cones, and after it sets, injection molding a second layer of an elastomeric plastic directly against the first layer so that the first layer forms a replaceable cap for the second layer after being removed from the mold. The second layer is molded about a male mold part having screw threads about its shank and a boss abutting the first cone with an elongated crevice adjacent thereto. The screw thread of the second layer deforms to permit the closure to be pulled free from the mold. The crevice and first cone form an elastomeric flap and valve opening comprising a check valve and the second cone forms a liquid outlet.
Inventors
- 👤 Douglas W Anderson
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 23:34
CPC Classifications
A; A61; A61J; A61J11/00; A61J11/0075; A61J11/008; A61J11/02
Claims Analysis
Total Claims: 6
Claim 1
Independent Claim
239 words
A combination of a check valve and a closure for a fluid container comprising: first and second portions; at least the second portion of the closure having an outer plastic layer and an inner elastomeric layer; said first portion including a means for holding said closure firmly to said container; said second portion including an outlet for a fluid that may be contained within said container and a valve means for permitting air to enter said container to replace fluid flowing out of said container through said outlet; said valve means including internal walls in said elastomeric layer defining a valve opening and an integrally formed flap extending from said layer and being of the same material as the layer; said flap being sufficiently close to said valve opening to close said valve opening when forced against the layer surrounding said valve opening; said means for holding said closure to said container including a plurality of threads formed of an elastomeric material, whereby said threads may be removed from a mold part by deforming to permit said closure to be pulled laterally from the mold part; said outer plastic layer having an inner surface formed to fit over said inner elastomeric layer of said second portion and having a pin extending downwardly through said valve opening; and said outer plastic layer and said inner elastomeric layer being formed of materials that are releasable from one another when molded together.
Claim 2
Dependent Claim
239 words
A combination of a check valve and a closure for a fluid container comprising: first and second portions; at least the second portion of the closure having an outer plastic layer and an inner elastomeric layer; said first portion including a means for holding said closure firmly to said container; said second portion including an outlet for a fluid that may be contained within said container and a valve means for permitting air to enter said container to replace fluid flowing out of said container through said outlet; said valve means including internal walls in said elastomeric layer defining a valve opening and an integrally formed flap extending from said layer and being of the same material as the layer; said flap being sufficiently close to said valve opening to close said valve opening when forced against the layer surrounding said valve opening; said means for holding said closure to said container including a plurality of threads formed of an elastomeric material, whereby said threads may be removed from a mold part by deforming to permit said closure to be pulled laterally from the mold part; said outer plastic layer having an inner surface formed to fit over said inner elastomeric layer of said second portion and having a pin extending downwardly through said valve opening; and said outer plastic layer and said inner elastomeric layer being formed of materials that are releasable from one another when molded together.
Claim 3
Dependent Claim
80 words
A nursing container comprising the combination of a bottle with the combination of claim 1 in which: said closure further comprises a second outer plastic layer separated from said first-mentioned outer plastic layer and extending around said first portion to form a protective shank over said elastomeric thread for said closure; said second portion of closure includes a nipple formed in said elastomeric layer; and said bottle includes an externally threaded neck engaged with the elastomeric threads of said closure.
Claim 4
Dependent Claim
39 words
A nursing container according to claim 2, in which: said valve means includes a recess in said inner elastomeric layer of said second portion surrounding said valve opening; said flap being loosely held within said recess by said bottle.
Claim 5
Dependent Claim
150 words
A closure for a fluid container comprising: FIRST and second portions; said first portion including a means for holding said closure firmly to a container; said second portion including an outlet for fluid within said container and a valve means for permitting air to enter said container to replace fluid flowing out of said container through said outlet; said first and second portions comprising an outer plastic layer and an inner elastomeric layer; said outer plastic layer having an inner surface formed to fit over said inner elastomeric layer; said valve means including a valve opening; said outer plastic layer including integrally formed pins extending downwardly through said valve opening and said outlet; said outer plastic layer and said inner elastomeric layer being formed of materials that are releasable from one another when molded together; and said second portion of said closure including a nipple formed in said elastomeric layer.
Claim 6
Dependent Claim
150 words
A closure for a fluid container comprising: FIRST and second portions; said first portion including a means for holding said closure firmly to a container; said second portion including an outlet for fluid within said container and a valve means for permitting air to enter said container to replace fluid flowing out of said container through said outlet; said first and second portions comprising an outer plastic layer and an inner elastomeric layer; said outer plastic layer having an inner surface formed to fit over said inner elastomeric layer; said valve means including a valve opening; said outer plastic layer including integrally formed pins extending downwardly through said valve opening and said outlet; said outer plastic layer and said inner elastomeric layer being formed of materials that are releasable from one another when molded together; and said second portion of said closure including a nipple formed in said elastomeric layer.
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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) | 1974-07-19 | 1975-01-18 | 1975-07-20 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-07-19 | 1979-01-18 | 1979-07-20 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-07-19 | 1983-01-18 | 1983-07-20 | $7700.00 | Window Closed / Lapsed |