Patent · US Expired

Hydraulic cylinder control system for garbage collection truck lift-dump handler

US4986074A · kind A · utility

23Cited by

8References

21Claims

0Family size

Assignees

Barmag AG · DE
Edelhoff Polytechnik GmbH · DE

Inventors

Wolfgang Hahmann · Kempen, DE
Johannes Kirchhoff · Iserlohn, DE
Georg Sandkuhler · Hemer, DE

Key dates

Filing date	Dec 21, 1988
Grant date	Jan 22, 1991
Priority date	—
Expiry date	Dec 21, 2008

Classification

Technology area (CPC B)Performing Operations; Transporting
CPC primaryB65F2003/0279
WIPO fieldEnvironmental technology
WIPO sectorChemistry

Abstract

An article handling apparatus is disclosed which comprises two independently controllable fluid actuated drives. The first fluid actuated drive comprises a cylinder and a differential piston which defines a large chamber and a smaller chamber. Also, a control system is provided which maintains a differential pressure between the large and small chambers in each of several operating positions. The second fluid actuated drive is mounted to the movable member of the first drive, and the second drive is controlled by fluid lines leading respectively to the large and small chambers of the first drive.

Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.