Hydraulically-operated equipment for construction machinery
US5365737A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Dec 16, 1993 |
| Grant date | Nov 22, 1994 |
| Priority date | — |
| Expiry date | Dec 16, 2013 |
Classification
- Technology area (CPC E)Fixed Constructions
- CPC primaryE02F9/2221
- WIPO fieldCivil engineering
- WIPO sectorOther fields
Abstract
Hydraulically-operated equipment such as travelling equipment or working equipment for use in construction machinery such as a power shovel, shoveldozer and bulldozer. The hydraulically-operated equipment comprises a hydraulic driving mechanism actuated by hydraulic pressure, a hydraulic pressure supplying device for supplying hydraulic pressure to a hydraulic pipeline system for the hydraulic driving mechanism and a controller for controlling the hydraulic pressure supplying device such that the supplying rate at which hydraulic pressure is supplied to the hydraulic pipeline system according to the supply of hydraulic pressure is decreased in a specified period after a dead zone period in which hydraulic pressure starts to rise. This arrangement prevents an operational lag in the hydraulic driving mechanism as well as a shock at the time of start-up and shut-down.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.