US4068878A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Container lift coupling
Assignee: United States Department of the Navy
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Filing: 1976-09-28
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Granted: 1978-01-17
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Expires: 1996-09-28
Abstract
Abstract A twist lock coupling for use in handling cargo containers of the type usedn I.S.O. systems. An elongated support bar is inserted and rotated within an attachment fitting of the container. A keeper rotatable on the bar, and receivable on the fitting, includes a transverse recess for locking the bar in an orthogonal position thereto.
Inventors
- 👤 Irving Wilner
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 13:03
CPC Classifications
B; B66; B66C; B66C1/00; B66C1/10; B66C1/62; B66C1/66; B66C1/663; F; F16; F16B; F16B2200/00; F16B2200/20; Y; Y10; Y10T; Y10T29/00; Y10T29/49; Y10T29/49998
Claims Analysis
Total Claims: 12
Claim 1
Independent Claim
171 words
A twist lock coupling for a hollow lift fitting having a slot therethrough, comprising, in combination: a shank member for inserting in the slot and having an elongated shank portion adapted to be connected at one end to a lifting device and having at the other end a pair of opposed segments laterally extending in opposite directions from said shank portion formed to closely fit through the slot when parallelly aligned therewith and to engage the inside of the lift fitting on either side of the slot when orthogonally aligned therewith; and a locking member rotatably and slidably disposed on said shank portion intermediate the ends and laterally extending in opposite directions from said shank portion and formed to fit in the slot when parallelly aligned therewith, said locking member having a recess formed therein for non-rotatable gravitational engagement with said segments and the fitting when said shank member is inserted in the slot with said segments orthogonally aligned below the slot, thereby locking said shank member in the lift fitting.
Claim 2
Dependent Claim
171 words
A twist lock coupling for a hollow lift fitting having a slot therethrough, comprising, in combination: a shank member for inserting in the slot and having an elongated shank portion adapted to be connected at one end to a lifting device and having at the other end a pair of opposed segments laterally extending in opposite directions from said shank portion formed to closely fit through the slot when parallelly aligned therewith and to engage the inside of the lift fitting on either side of the slot when orthogonally aligned therewith; and a locking member rotatably and slidably disposed on said shank portion intermediate the ends and laterally extending in opposite directions from said shank portion and formed to fit in the slot when parallelly aligned therewith, said locking member having a recess formed therein for non-rotatable gravitational engagement with said segments and the fitting when said shank member is inserted in the slot with said segments orthogonally aligned below the slot, thereby locking said shank member in the lift fitting.
Claim 3
Dependent Claim
48 words
The coupling of claim 1 wherein said locking member comprises means formed to extend above the slot to permit lifting of said locking member to disengage said locking member from said shank member and to permit alignment of said segments with the slot for removing the coupling therefrom.
Claim 4
Dependent Claim
58 words
The coupling of claim 2 wherein: said segments are rectangular and concentric with said shank portion; and said locking member recess is a rectangular groove concentric with said elongated shank portion and formed on the side of said locking member adjacent said segments, said groove having a width equal to the width of said segments for engagement therewith.
Claim 5
Dependent Claim
20 words
The coupling of claim 3 wherein the widths and lengths of said segments and said locking member are substantially equal.
Claim 6
Dependent Claim
19 words
The coupling of claim 4 wherein said shank portion has an eyelet axilly formed at the said one end.
Claim 7
Dependent Claim
129 words
A twist lock coupling for a lift fitting, comprising, in combination: an elongated shank adapted to be connected at one end to a lifting device and to be inserted from one end into the fitting; a support member formed to be received in the fitting when aligned therewith and to engage the fitting when not aligned therewith and secured to the other end of said shank; and a locking member rotatably and slidably disposed on said shank and formed to be inserted in the lift fitting when aligned therewith, said locking member having a recess formed therein for non-rotatably gravitational engagement with said support member when said support member is engaged and said locking member is received in the fitting, thereby locking said support member in the lift fitting.
Claim 8
Dependent Claim
129 words
A twist lock coupling for a lift fitting, comprising, in combination: an elongated shank adapted to be connected at one end to a lifting device and to be inserted from one end into the fitting; a support member formed to be received in the fitting when aligned therewith and to engage the fitting when not aligned therewith and secured to the other end of said shank; and a locking member rotatably and slidably disposed on said shank and formed to be inserted in the lift fitting when aligned therewith, said locking member having a recess formed therein for non-rotatably gravitational engagement with said support member when said support member is engaged and said locking member is received in the fitting, thereby locking said support member in the lift fitting.
Claim 9
Dependent Claim
49 words
The coupling of claim 6 wherein said locking member comprises means formed to extend above the fitting to permit lifting of said locking member to disengage said locking member from said support member and to permit alignment of said support member with the fitting for removing the coupling therefrom.
Claim 10
Dependent Claim
59 words
The coupling of claim 7 wherein: said support member is rectangular and concentric with said shank; and said locking member recess is a rectangular groove concentric with said elongated shank and formed on the side of said locking member adjacent said support member, said groove having a width equal to the width of said support member for engagement therewith.
Claim 11
Dependent Claim
21 words
The coupling of claim 8 wherein the widths and lengths of said support member and said locking member are substantially equal.
Claim 12
Dependent Claim
18 words
The coupling from claim 9 wherein said shank has an eyelet axially formed at the said one end.
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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) | 1981-01-16 | 1981-07-18 | 1982-01-17 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1985-01-16 | 1985-07-18 | 1986-01-17 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1989-01-16 | 1989-07-18 | 1990-01-17 | $7700.00 | Window Closed / Lapsed |