Crane apparatus having hydraulic control system
US4667834A · kind A · utility
41Cited by
7References
14Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Jun 21, 1985 |
| Grant date | May 26, 1987 |
| Priority date | — |
| Expiry date | Jun 21, 2005 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY02T10/72
- WIPO fieldHandling
- WIPO sectorMechanical engineering
Abstract
A crane apparatus having a hydraulic system for controlling the operation of the hoist and bridge, and gantry drive functions of the equipment. The hoist, bridge and drive components are driven by an AC motor that is powered by an AC generator. The AC motor in turn operates a variable displacement hydraulic pump which is variable from zero to a maximum flow rate in either direction for infinite speed control. The output of the hydraulic pumps is directed to respective hydraulic motors which drive the particular function being controlled.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.