Hydraulically operated cranes
OwnerGeoffrey F. Kirkinventor
Life of this patent
Estimating the term…
Abstract
A crane has a hollow substantially cylindrical load trolley supporting a girder and a support arrangement for the girder. A trolley track device is positioned on the outside of the hollow cylindrical girder for traversing a load along the girder means. A load trolley is supported upon the trolley track with the trolley track being arranged so that a line of action of a load force is applied tangentially to the hollow cylindrical girder. A hogging arrangement is mounted towards the base of the hollow cylindrical girder. The hogging arrangement includes a tensioning member extending the length of the girder.
Claims13
A crane comprising
- hollow substatantially cylindrical load trolley supporting girder means,
- support means for said hollow cylindrical girder means,
- trolley track means on the outside of the hollow cylindrical girder means for traversing a load along said hollow cylindrical girder means, and
- a load trolley supported upon said trolley track means with the trolley track means arranged so that the line of action of the load forces is applied tangentially to said hollow cylindrical girder means.
A crane comprising
- twin parallel hollow cylindrical girders,
- support means for said twin parallel hollow cylindrical girders,
- action trolley tracks on the outside of adjacent surfaces of each of the said twin parallel hollow cylindrical girders for traversing a load along said twin parallel hollow cylindrical girders, and
- a load trolley supported upon the action trolley tracks between the twin parallel hollow cylindrical girders so that the load is divided and the line of action of each component is applied tangentially to the associated hollow cylindrical girder.
A crane comprising
- hollow cylindrical load trolley supporting girder means,
- support means for said hollow cylindrical girder means,
- trolley track means on the outside of the hollow cylindrical girder means for traversing a load along the hollow cylindrical girder,
- a load trolley supported upon said trolley track means with the trolley track means arranged so that the line of action of the load forces is applied tangentially to said hollow cylindrical girder means, and
- reinforcing means associated with said hollow cylindrical girder means.
A crane comprising hollow substantially cylindrical load trolley supporting girder means, support means for said hollow cylindrical girder means, trolley track means on the outisde of the hollow substantially cylindrical girder means for traversing a load along the hollow cylindrical girder means,
- a load trolley supported upon said trolley track means with the trolley track means arranged so that a line of action of a load force is applied substantially tangentially to said hollow cylindrical girder means, and
- hogging means mounted towards the base of said hollow cylindrical girder, said hogging means comprising a tensioning member extending the length of said hollow cylindrical girder means and anchored substantially to the ends thereof and tensioning means acting to induce a tension in said tension member.
Dependencies are inferred from the claim text.