US3815774A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Container contents retaining device
Assignee: AMF Inc
•
Filing: 1972-05-24
•
Granted: 1974-06-11
•
Expires: 1992-05-24
Abstract
Abstract The retainer comprises a plastic flange for the top of the waste container. The flange is sloped down and has folds in it so it can open and deflect down to pass material therethrough. However, it will close in the opposite direction to retain compacted foam plastic refuse in the container.
Inventors
- 👤 F Olsson
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 15:57
CPC Classifications
B; B65; B65F; B65F1/00; B65F1/14; B65F1/16; B65F1/1607; Y; Y10; Y10S; Y10S220/00; Y10S220/908
Claims Analysis
Total Claims: 4
Claim 1
Independent Claim
123 words
A retainer for a refuse container, the retainer comprising a collar having a flange for attaching the retainer to the container and having a membrane which has an aperture therethrough and is formed of a plurality of flexible webs, whereby when the retainer is mounted on a container by means of said flange, refuse can be inserted into said container through the aperture in the retainer whereupon the webs can flex to increase the size of the aperture and when refuse has passed through the aperture the webs flex in the opposite direction to decrease the size of the aperture and thus help to prevent the refuse from passing back out of the container, wherein the webs are interconnected by radial loop-shaped ribs.
Claim 2
Dependent Claim
123 words
A retainer for a refuse container, the retainer comprising a collar having a flange for attaching the retainer to the container and having a membrane which has an aperture therethrough and is formed of a plurality of flexible webs, whereby when the retainer is mounted on a container by means of said flange, refuse can be inserted into said container through the aperture in the retainer whereupon the webs can flex to increase the size of the aperture and when refuse has passed through the aperture the webs flex in the opposite direction to decrease the size of the aperture and thus help to prevent the refuse from passing back out of the container, wherein the webs are interconnected by radial loop-shaped ribs.
Claim 3
Dependent Claim
40 words
A retainer as claimed in claim 1 wherein each loop-shaped rib is open at the bottom and closed at the top, is upstanding from the webs and tapers in depth from its distal end to its end adjacent the flange.
Claim 4
Dependent Claim
39 words
A retainer as claimed in claim 2 wherein the flange and membrane are annular and the membrane has a central circular opening, and the flange, member and ribs being integral with each other and made of low density polyethylene.
References Cited (Backward Citations)
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US3116927A
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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) | 1977-06-10 | 1977-12-10 | 1978-06-11 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1981-06-10 | 1981-12-10 | 1982-06-11 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1985-06-10 | 1985-12-10 | 1986-06-11 | $7700.00 | Window Closed / Lapsed |