Method and apparatus for operating a crane
AssigneeKundel Industries, Inc.
InventorsRobert Kundel, Sr., Richard A. Schley, Andrew A. Pirigyi
Life of this patent
Estimating the term…
Abstract
A davit crane that includes a base adapted to operably engage with a ground surface. The davit crane also includes a drive assembly operably engaged with the base. The davit crane also includes an actuation assembly operably engaged with the drive assembly, wherein the actuation assembly is configured to move between a lowered position and a raised position via the drive assembly. The davit crane also includes a boom assembly operably engaged with the actuation assembly. The actuation assembly of the davit crane is operable to pivotably adjust the boom assembly between the raised position and the lowered position.
Claims18
A davit crane, comprising:
- a base adapted to operably engage with a ground surface and having a top end, a bottom end positioned opposite to the top end, and a longitudinal axis defined therebetween
- a drive assembly operably engaged with the base;
- a slew bearing operably engaged with the drive assembly and the base, the slew bearing having:
- an inner ring operably engaged with the drive assembly;
- a first outer ring operably engaged on the inner ring and operably engaged with the base;
- and
- a second outer ring operably engaged on the inner ring opposite to the first outer ring and operably engaged with the base;
- an actuation assembly operably engaged with the drive assembly, wherein the actuation assembly is configured to move between a lowered position and a raised position via the drive assembly;
- and
- a boom assembly operably engaged with the actuation assembly;
- wherein the actuation assembly is operable to pivotably adjust the boom assembly between the raised position and the lowered position;
- wherein the inner ring is configured to collectively rotate the actuation assembly, the boom assembly, and the drive assembly about the longitudinal axis of the base.
A method of lifting an object with a davit crane, comprising steps of:
- engaging the object with a boom arm of a boom assembly of the davit crane;
- applying a first rotational force on a gear system of a drive assembly of the davit crane;
- applying a second rotational force, via the gear system, on an actuation assembly of the davit crane;
- vertically moving the actuation assembly from a lowered position to a raised position relative to a base of the davit crane;
- pivoting a first end of the boom arm of the boom assembly, via the actuation assembly, upwardly away from the base;
- and
- pivoting a second end of the boom arm of the boom assembly, via the actuation assembly, downwardly towards the base, wherein the second end of the boom arm opposes the first end of the boom arm.
Dependencies are inferred from the claim text.