US4248467A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Lifting and lowering device for handling goods containers
Assignee: Modular Distribution Systems Ltd
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Filing: 1979-04-09
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Granted: 1981-02-03
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Expires: 1999-04-09
Abstract
Abstract A lifting and lowering device for attachment to the corner of an ISO goods container, comprising twist-lock devices carried at one side of a post and a sleeve which is slidable on and lockable to the post allowing adjustment of the spacing of the twist-lock devices, an extendable leg with its operating ram housed within the post, and projecting from the opposite side of the post from the twist-lock devices fixed legs or the like give to the device free-standing stability when the leg is fully retracted into the post.
Inventors
- 👤 David Allen
- 👤 Robert J. Rowley
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 06:10
CPC Classifications
B; B66; B66F; B66F3/00; B66F3/24; B66F3/25; B66F3/36; B65; B65D; B65D90/00; B65D90/12; B65D90/14; B65D90/143
Claims Analysis
Total Claims: 5
Claim 1
Independent Claim
198 words
A lifting and lowering device for attachment to a goods container having ISO castings or the like fitments, the device comprising a hollow post, a leg slidably housed within the post and having a foot for contacting the ground when lifting or lowering the container, power-operated means connected to effect sliding of the leg relative to the post, upper and lower twist locks carried by the device on one side thereof for lockably engaging the ISO castings or the like of a container to which the lifting and lowering device is to be attached, one of said twist locks being adjustable in position length-wise of the post, said upper twist lock being rotatable between a locked position and an unlocked position, operating means mounted on the post spaced below the upper twist lock and connected to it to effect rotation of the upper twist lock between said locked and unlocked positions, means engagable by a mechanical machine to enable the device to be positioned on a container, and ground-engaging means mounted on the device and adapted when the leg is retracted to contact the ground at positions off-set from the foot to render the device stable when free-standing.
Claim 2
Dependent Claim
198 words
A lifting and lowering device for attachment to a goods container having ISO castings or the like fitments, the device comprising a hollow post, a leg slidably housed within the post and having a foot for contacting the ground when lifting or lowering the container, power-operated means connected to effect sliding of the leg relative to the post, upper and lower twist locks carried by the device on one side thereof for lockably engaging the ISO castings or the like of a container to which the lifting and lowering device is to be attached, one of said twist locks being adjustable in position length-wise of the post, said upper twist lock being rotatable between a locked position and an unlocked position, operating means mounted on the post spaced below the upper twist lock and connected to it to effect rotation of the upper twist lock between said locked and unlocked positions, means engagable by a mechanical machine to enable the device to be positioned on a container, and ground-engaging means mounted on the device and adapted when the leg is retracted to contact the ground at positions off-set from the foot to render the device stable when free-standing.
Claim 3
Dependent Claim
58 words
A lifting and lowering device according to claim 1, wherein said ground-engaging means comprises splayed non-extendable legs secured to the post, which legs, when the sliding leg is retracted, contact the ground so that the center of gravity of the device is central above the three points at which the foot and the non-extendable legs contact the ground.
Claim 4
Dependent Claim
27 words
A lifting and lowering device according to claim 1, wherein said ground-engaging means comprises auxiliary legs mounted on a framework lockable to and detachable from the post.
Claim 5
Dependent Claim
31 words
A lifting and lowering device according to claim 1, wherein the ground-engaging means comprises a platform extending from the foot on the side of the post remote from said locking devices.
References Cited (Backward Citations)
US3447697A
Cited
US3586183A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1984-02-03 | 1984-08-04 | 1985-02-03 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1988-02-03 | 1988-08-04 | 1989-02-03 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1992-02-03 | 1992-08-04 | 1993-02-03 | $7700.00 | Window Closed / Lapsed |