US3872745A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Opener tool
Assignee: Vitro SAB de CV
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Filing: 1974-05-31
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Granted: 1975-03-25
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Expires: 1994-05-31
Abstract
Abstract An opening tool for use with closures of a modified crown type is disclosed. This is a hand operated one piece tool formed of flat stock and having a handle portion and a offset hooked end. The hooked end engages with a substantial portion (about 30*) of the under edge of the closure while the junction of the hook and handle portions engages the top of the closure immediately adjacent the part engaged by the hooked portion. The handle then extends completely across the top of the container and is fulcrumed thereon at the junction of the hooked and handle portions.
Inventors
- 👤 Roberto Cavazos Garza
- 👤 John Martin
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 02:37
CPC Classifications
B; B67; B67B; B67B7/00; B67B7/16
Claims Analysis
Total Claims: 3
Claim 1
Independent Claim
140 words
An opening tool for closures of the general crown type comprising: a first elongated flat handle portion; a second relatively short flat extension of said handle portion extending integrally therefrom at an obtuse angle; a third portion integral with said second and of substantially the same width, said third portion being U-shaped in crosssection and terminating in a relatively thin edge, the distance between said edge and the junction of said first and second portions being such that said edge can engage under the closure to be removed when the said junction is positioned on the immediately adjacent portion of the closure overlying the rim of the container, so that forcing said flat portion down flush with the upper surface of the closure stresses the closure in hoop tension to enlarge its internal diameter sufficiently to permit removal by hand.
Claim 2
Dependent Claim
140 words
An opening tool for closures of the general crown type comprising: a first elongated flat handle portion; a second relatively short flat extension of said handle portion extending integrally therefrom at an obtuse angle; a third portion integral with said second and of substantially the same width, said third portion being U-shaped in crosssection and terminating in a relatively thin edge, the distance between said edge and the junction of said first and second portions being such that said edge can engage under the closure to be removed when the said junction is positioned on the immediately adjacent portion of the closure overlying the rim of the container, so that forcing said flat portion down flush with the upper surface of the closure stresses the closure in hoop tension to enlarge its internal diameter sufficiently to permit removal by hand.
Claim 3
Dependent Claim
40 words
A tool as defined by claim 1 in which said edge portion is substantially a section of a circle the radius of which is substantially equal to the radius of the closures with which the tool is to be used.
References Cited (Backward Citations)
US1877019A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1978-03-24 | 1978-09-23 | 1979-03-25 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1982-03-24 | 1982-09-23 | 1983-03-25 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1986-03-24 | 1986-09-23 | 1987-03-25 | $7700.00 | Window Closed / Lapsed |