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US3954293A Expired / Lapsed US ⏱️ 0.0 years remaining

Self-protecting latch

Assignee: United States Department of the Air Force
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Filing: 1974-04-29
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Granted: 1976-05-04
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Expires: 1994-04-29
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Abstract

Abstract An improved latch for use on munition shipping containers or the like for operation with any commonly available tool which increases the mechanical advantage to provide high opening and closing forces while avoiding exposed easily damaged surfaces. The large exposed surfaces on presently available hand operated latches are eliminated thereby preventing damage resulting from accidental hooking on projecting surfaces and/or adjacent latches.

Inventors

  • 👤 Walton A. Orr

Bibliographic Details

Application Number —
Jurisdiction US
Data Source google_patents
Last Synchronized 2026-11-04 02:08
CPC Classifications
E; E05; E05C; E05C19/00; E05C19/10; E05C19/12; E05C19/14; Y; Y10; Y10S; Y10S292/00; Y10S292/49; Y10T; Y10T292/00; Y10T292/08; Y10T292/0886; Y10T292/0892; Y10T292/0911; Y10T292/0913; Y10T292/0914; Y10T292/0917; Y10T292/20; Y10T292/202

Claims Analysis

Total Claims: 4
Claim 1
Independent Claim 231 words
A self-protecting latch for use on an ammunition shipping container having a cover positioned on a body portion with a resilient gasket therebetween, said latch comprising, in combination, a pivotable lever element and a channel member attached to the body portion of the container, said lever element including a socket in the forward end thereof for receiving a removable lever handle, means for pivoting said lever element relative to said channel member, a king pin positioned laterally in the central portion of said lever element, said channel member having elongated parallel side walls, said king pin extending outwardly beyond the sides of said lever arm for engaging the upper edge of the side walls of said channel member, a rod having one end pivotally attached to said lever arm and extending rearwardly therefrom, the other end of said rod being attachable to the cover of the container, and an integral pivot eye on the inward end of said rod, said pivot eye being positioned to receive said king pin and be rotatable therearound, whereby the rotation of said pivotable lever element relative to said channel member causes said rod to be drawn inward with said pivot eye rotating on said king pin until the outward projections thereon contact the walls of said channel member thereby closing the cover and sealing the container by causing the resilient gasket to be suitably deformed.
Claim 2
Dependent Claim 231 words
A self-protecting latch for use on an ammunition shipping container having a cover positioned on a body portion with a resilient gasket therebetween, said latch comprising, in combination, a pivotable lever element and a channel member attached to the body portion of the container, said lever element including a socket in the forward end thereof for receiving a removable lever handle, means for pivoting said lever element relative to said channel member, a king pin positioned laterally in the central portion of said lever element, said channel member having elongated parallel side walls, said king pin extending outwardly beyond the sides of said lever arm for engaging the upper edge of the side walls of said channel member, a rod having one end pivotally attached to said lever arm and extending rearwardly therefrom, the other end of said rod being attachable to the cover of the container, and an integral pivot eye on the inward end of said rod, said pivot eye being positioned to receive said king pin and be rotatable therearound, whereby the rotation of said pivotable lever element relative to said channel member causes said rod to be drawn inward with said pivot eye rotating on said king pin until the outward projections thereon contact the walls of said channel member thereby closing the cover and sealing the container by causing the resilient gasket to be suitably deformed.
Claim 3
Dependent Claim 36 words
The self-protecting latch defined in claim 1 wherein the means for pivoting said lever element includes a pair of pivot pins, one each through the side wall of said channel member at the rearward end thereof.
Claim 4
Dependent Claim 34 words
The self-protecting latch defined in claim 2 wherein a bearing means is positioned between each side of said integral pivot eye and the inner wall of said lever element for reducing the friction therebetween.

References Cited (Backward Citations)

US2732238A Cited
GB190403389A Cited
US1118768A Cited
US2991108A Cited
US2943589A Cited
US3021162A Cited
FR1476111A Cited
US3588156A Cited
US3636683A Cited
US3873142A Cited

USPTO Annuity & Maintenance Windows

Annuity Stage Window Opens Payment Deadline Surcharge Period Until Estimated Fee Status
3.5 Years (Year 4) 1979-05-04 1979-11-03 1980-05-04 $2000.00 Window Closed / Lapsed
7.5 Years (Year 8) 1983-05-04 1983-11-03 1984-05-04 $3760.00 Window Closed / Lapsed
11.5 Years (Year 12) 1987-05-04 1987-11-03 1988-05-04 $7700.00 Window Closed / Lapsed

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