Patent US3820474A successfully refreshed from Google Patents.
US3820474A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Manual conlock
Assignee: BACKTEMANS PATENTER AB
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Filing: 1972-02-01
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Granted: 1974-06-28
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Expires: 1992-02-01
Abstract
Abstract A manually vertical coupling device for disengageably securing a freight container to another container or to a loading platform. The coupling device is a separate unit having turnable twistlocks extending in opposite directions, which twist-locks in an initial position are insertable in elongate apertures in the corner castings of a container. The body of the coupling device is a solid mass having a through shaft turnably journalled therein. The shaft is integral with the twist-locks and is manually actuatable between a non-clamping position and a clamping position for securing the containers.
Inventors
- 👤 H Backteman
- 👤 R Taylor
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 19:00
CPC Classifications
B; B65; B65D; B65D90/00; B65D90/0006; B65D90/0013
Claims Analysis
Total Claims: 9
Claim 1
Independent Claim
177 words
In a manually operable vertical coupling device for disengageably securing a freight container to another container or to a loading platform, said coupling device being a separate unit which includes turnable twist-locks extending in opposite directions, said twist-locks in an initial position being insertable in elongated apertures in the corner castings of a container, the improvement comprising a non-compressible solid body, a through shaft turnably journalled in the center of said body, said shaft being integral with the twist-locks and manually actuatable between a non-clamping position and a clamping position for securing the containers and being capable of having a pin attached thereto, and a recess in said body extending from an outer end twoards the center of said body and having a height equal to that of said body for permitting such pin to be connected to said shaft and to extend outwardly therefrom for manual actuation of the twist-locks between the non-clamping position and the clamping position and to indicate the position of the twist-locks in relation to the elongated aperture of the corner castings.
Claim 2
Dependent Claim
177 words
In a manually operable vertical coupling device for disengageably securing a freight container to another container or to a loading platform, said coupling device being a separate unit which includes turnable twist-locks extending in opposite directions, said twist-locks in an initial position being insertable in elongated apertures in the corner castings of a container, the improvement comprising a non-compressible solid body, a through shaft turnably journalled in the center of said body, said shaft being integral with the twist-locks and manually actuatable between a non-clamping position and a clamping position for securing the containers and being capable of having a pin attached thereto, and a recess in said body extending from an outer end twoards the center of said body and having a height equal to that of said body for permitting such pin to be connected to said shaft and to extend outwardly therefrom for manual actuation of the twist-locks between the non-clamping position and the clamping position and to indicate the position of the twist-locks in relation to the elongated aperture of the corner castings.
Claim 3
Dependent Claim
21 words
A coupling device according to claim 1 further comprising a pin connected to said shaft for manual actuation of the twist-locks.
Claim 4
Dependent Claim
18 words
A coupling device according to claim 1, wherein said recess is in the form of a cut-away portion.
Claim 5
Dependent Claim
25 words
A coupling device according to claim 1, wherein the twist-locks extending in opposite directions are mutually angularly displaced in relation to the same vertical plane.
Claim 6
Dependent Claim
18 words
A coupling device according to claim 4, wherein the relative angular displacement is to between 10* and 80*.
Claim 7
Dependent Claim
34 words
A coupling device according to claim 1, wherein the coupling device further comprises retention means to secure the pin connected to the sHaft in the container clamping position and/or in the container non-clamping position.
Claim 8
Dependent Claim
30 words
A coupling device according to claim 6, wherein the retention means are spring clips mounted on the surfaces of the recess, said spring clips retaining the pin in locking position.
Claim 9
Dependent Claim
30 words
A coupling device according to claim 1, comprising a detachable operating handle mounted on the pin extending from the shaft in order to facilitate the manual operation of the twist-locks.
References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1977-06-27 | 1977-12-27 | 1978-06-28 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1981-06-27 | 1981-12-27 | 1982-06-28 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1985-06-27 | 1985-12-27 | 1986-06-28 | $7700.00 | Window Closed / Lapsed |