Title:
CRANE
Document Type and Number:
Japanese Patent JPS57114747
Kind Code:
A
Abstract:
A crane having outriggers that can be extended transversely of the main frame of the crane, and a vertically positionable jack is located at the outer ends of the outriggers and include a vertical, threaded shaft having a ground engaging pad at its lower end and which is non-rotatably carried by the outer end of the beam. A power drive is located within the beam for rotating a large nut that is engaged by the shaft and which is carried by the interior portion of the beam. This power drive includes a hydraulic motor which drives a speed reducer which in turn furnishes power to the sprocket and endless chain connection between the speed reducer and threadably driven nut.
Inventors:
NARAHARI GATSUTOU
JIYOSEFU SHIII TERANOBA SAADO
JIYOSEFU SHIII TERANOBA SAADO
Application Number:
JP17729081A
Publication Date:
July 16, 1982
Filing Date:
November 06, 1981
Export Citation:
Assignee:
HARNISCHFEGER CORP
International Classes:
B60P3/28; B66C23/78; B60S9/08; (IPC1-7): B60P3/28; B60S9/10; B66C23/78
Domestic Patent References:
| JPS50133611U | 1975-11-04 |