Ballast apparatus and crane, in particular crawler-mounted crane
US-10124994-B2 · Nov 13, 2018 · US
Mobile lift crane with variable position counterweight
US8985353B2 · US · B2
| Field | Value |
|---|---|
| Publication number | US-8985353-B2 |
| Application number | US-201313963993-A |
| Country | US |
| Kind code | B2 |
| Filing date | Aug 9, 2013 |
| Priority date | Oct 27, 2006 |
| Publication date | Mar 24, 2015 |
| Grant date | Mar 24, 2015 |
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Abstract
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A mobile lift crane includes a carbody; a rotating bed; a boom; a moveable counterweight unit; at least one linear actuation device; and at least one arm pivotally connected at a first end to the rotating bed and at a second end to the linear actuation device. The arm and linear actuation device are connected between the rotating bed and the counterweight unit such that extension and retraction of the linear actuation device changes the position of the counterweight unit compared to the rotating bed. In one method of operation, the counterweight unit is never supported by the ground during crane pick, move and set operations other than indirectly by the ground engaging members on the carbody.
First claim
Opening claim text (preview).
The invention claimed is: 1. A mobile lift crane comprising: a) a carbody having moveable ground engaging members; b) a rotating bed rotatably connected about an axis of rotation to the carbody such that the rotating bed can swing with respect to the ground engaging members; c) a boom pivotally mounted on a front portion of the rotating bed; d) a mast mounted at its first end on the rotating bed; e) a moveable counterweight unit; and f) a counterweight movement structure…
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- B66C23/76Primary
Operations & Transport · mapped topic
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Frequently asked questions
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- What does patent US8985353B2 cover?
- A mobile lift crane includes a carbody; a rotating bed; a boom; a moveable counterweight unit; at least one linear actuation device; and at least one arm pivotally connected at a first end to the rotating bed and at a second end to the linear actuation device. The arm and linear actuation device are connected between the rotating bed and the counterweight unit such that extension and retraction…
- Who is the assignee on this patent?
- Pech David J, Porubcansky Kenneth J, Manitowoc Crane Companies Llc
- What technology area does this patent fall under?
- Primary CPC classification B66C23/76. Mapped technology areas include Operations & Transport.
- When was this patent published?
- Publication date Tue Mar 24 2015 00:00:00 GMT+0000 (Coordinated Universal Time) (B2). Legal status and post-grant events are not shown on this page.
- What related patents are in patentsdb?
- We list 8 related publications on this page (citations in our corpus or others sharing the same primary CPC).