US3844597A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Safety latch
Assignee: Individual
•
Filing: 1973-08-29
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Granted: 1974-10-29
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Expires: 1993-08-29
Abstract
Abstract A safety latching device pivotally connected to the periphery of a cover closing a pressurized container for providing an increment of free displacement of the cover to thereby facilitate depressurization of the container. The latching device includes a latch pivotally suspended from the cover, such latch further including a weight bias distal the pivot when normally disposed to suspend an inwardly extending projection into engaging alignment below a cooperating catch formed on the container. Further included on the container is a permanent magnet aligned in opposition to the latch for maintaining the latch in engaging alignment. The pivotal motion of the latch is limited to form a handle in an extended position and to preclude any impact of the latch against the magnet.
Inventors
- 👤 D Elrod
- 👤 D Mcdougall
- 👤 C Elrod
- 👤 W Patrick
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 18:45
CPC Classifications
B; B65; B65D; B65D55/00; B65D55/02; B65D55/12; F; F16; F16J; F16J13/00; F16J13/24; Y; Y10; Y10T; Y10T292/00; Y10T292/08; Y10T292/0911; Y10T292/0937; Y10T292/0938; Y10T292/0944; Y10T292/11
Claims Analysis
Total Claims: 9
Claim 1
Independent Claim
133 words
A latching apparatus for providing an increment of free displacement of a container cover, comprising: a latching lever pivotally suspended at the upper end thereof from the periphery of the cover; a catch formed on the container in opposing alignment with said latching lever; a projection formed on the lower end of said lever extending a predetermined increment below said catch for engagement therewith at a predetermined increment of opening of the cover; weight bias means formed on said lever horizontally distal of the pivotal connection at the periphery of the cover for urging by gravity said projection into engaging alignment with said catch; and limit means formed on said lever proximate the upper end thereof for limiting the pivotal rotation thereof between a substantially horizontal extended position and a vertical suspended position.
Claim 2
Dependent Claim
133 words
A latching apparatus for providing an increment of free displacement of a container cover, comprising: a latching lever pivotally suspended at the upper end thereof from the periphery of the cover; a catch formed on the container in opposing alignment with said latching lever; a projection formed on the lower end of said lever extending a predetermined increment below said catch for engagement therewith at a predetermined increment of opening of the cover; weight bias means formed on said lever horizontally distal of the pivotal connection at the periphery of the cover for urging by gravity said projection into engaging alignment with said catch; and limit means formed on said lever proximate the upper end thereof for limiting the pivotal rotation thereof between a substantially horizontal extended position and a vertical suspended position.
Claim 3
Dependent Claim
68 words
Apparatus according to claim 1 wherein: said limit means including a first projecting structure extending radially from the pivot connection of said lever for abutting against an opposing surface of the cover when said lever is extended to a horizontal position and a second projecting structure extending transversely from said lever to oppose a peripheral edge of the cover when said lever is in a vertically suspended position.
Claim 4
Dependent Claim
23 words
Apparatus according to claim 2 further comprising: a permanent magnet formed on the exterior of the container in opposing relationship with said projection.
Claim 5
Dependent Claim
44 words
Apparatus according to claim 3 wherein: said second projecting structure is dimensioned to oppose the inward rotation of said lever at an angular position maintaining the adjacent end of said projection at a predetermined increment of separation from the opposing surface of said magnet.
Claim 6
Dependent Claim
201 words
Apparatus for providing a pressure release opening in a container, comprising: a cover pivotally mounted on the container for closing a horizontal opening formed therein; releasable securing means attached to said container for selectively sealably securing said cover to said opening; a latching lever pivotally suspended at the upper end thereof from the periphery of the cover at a point substantially opposite to the pivotal connection of said cover; a catch formed on the container in opposing alignment with said latching lever; a projection formed on the lower end of said lever extending a predetermined increment below said catch for engagement therewith at a predetermined increment of opening of the cover; weight bias means formed on said lever horizontally distal of the pivotal connection at the periphery of the cover for urging by gravity said projection into engaging alignment with said catch; and a first projecting structure extending radially from the pivot connection of said lever for abutting against an opposing surface of the cover when said lever is extended to a horizontal position and a second projecting structure extending transversely from said lever to oppose a peripheral edge of the cover when said lever is in a vertically suspended position.
Claim 7
Dependent Claim
201 words
Apparatus for providing a pressure release opening in a container, comprising: a cover pivotally mounted on the container for closing a horizontal opening formed therein; releasable securing means attached to said container for selectively sealably securing said cover to said opening; a latching lever pivotally suspended at the upper end thereof from the periphery of the cover at a point substantially opposite to the pivotal connection of said cover; a catch formed on the container in opposing alignment with said latching lever; a projection formed on the lower end of said lever extending a predetermined increment below said catch for engagement therewith at a predetermined increment of opening of the cover; weight bias means formed on said lever horizontally distal of the pivotal connection at the periphery of the cover for urging by gravity said projection into engaging alignment with said catch; and a first projecting structure extending radially from the pivot connection of said lever for abutting against an opposing surface of the cover when said lever is extended to a horizontal position and a second projecting structure extending transversely from said lever to oppose a peripheral edge of the cover when said lever is in a vertically suspended position.
Claim 8
Dependent Claim
23 words
Apparatus according to claim 5 further comprising: a permanent magnet formed on the exterior of the container in opposing relationship with said projection.
Claim 9
Dependent Claim
44 words
Apparatus according to claim 6 wherein: said second projecting structure is dimensioned to oppose the inward rotation of said lever at an angular position maintaining the adjaCent end of said projection at a predetermined increment of separation from the opposing surface of said magnet.
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) | 1977-10-28 | 1978-04-29 | 1978-10-29 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1981-10-28 | 1982-04-29 | 1982-10-29 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1985-10-28 | 1986-04-29 | 1986-10-29 | $7700.00 | Window Closed / Lapsed |