EP 0838554 A4 19990506 - WORKING MACHINE
Title (en)
WORKING MACHINE
Title (de)
ARBEITSMASCHINE
Title (fr)
ENGIN DE TRAVAUX
Publication
Application
Priority
- JP 9601881 W 19960705
- JP 17104495 A 19950706
Abstract (en)
[origin: WO9702385A1] A working machine in which a boom (5) is fixed vertically pivotably to a vehicle body (4), to which boom an arm (7) is fixed vertically pivotably with a bucket (10) fixed vertically pivotably to the arm, the boom, arm and bucket being driven by a boom cylinder (6), an arm cylinder (8) and a bucket cylinder (11) repectively. A vibration generator (13) is fixed to the arm, and a rolling-compaction member (19), a chisel (58) or a pile driver to the vibration generator interchangeably. A float valve (84) is provided which allows an expansion chamber to communicate with a contraction chamber of at least one of the boom cylinder, arm cylinder and bucket cylinder, and establishes or cuts off communication between them and a tank. The float valve is opened when a rolling-compaction operation is carried out, and closed when a breaking operation and a pipe driving operation are carried out.
IPC 1-7
IPC 8 full level
B25D 9/14 (2006.01); E02F 3/96 (2006.01); E02F 9/22 (2006.01)
CPC (source: EP KR)
B25D 9/145 (2013.01 - EP); E02F 3/36 (2013.01 - KR); E02F 3/967 (2013.01 - EP); E02F 9/221 (2013.01 - EP)
Citation (search report)
- No further relevant documents disclosed
- See references of WO 9702385A1
Designated contracting state (EPC)
DE GB IT
DOCDB simple family (publication)
WO 9702385 A1 19970123; EP 0838554 A1 19980429; EP 0838554 A4 19990506; KR 100429093 B1 20040730; KR 19990028410 A 19990415
DOCDB simple family (application)
JP 9601881 W 19960705; EP 96922250 A 19960705; KR 19970709726 A 19971226