Title:
AUGER DRIVING DEVICE
Document Type and Number:
Japanese Patent JPH11336456
Kind Code:
A
Abstract:
To obtain an auger driving device having large excavation capacity in spite of small size.
The auger driving device has an electric motor 32 and a hydraulic motor 36 simultaneously driving an auger screw 14 while having a pressure control valve 56 controlling hydraulic-fluid pressure fed to the hydraulic motor 36. An electromagnetic proportional pressure control valve is used as the pressure control valve 56, and the auger driving device has a control circuit 62 controlling the above-mentioned electromagnetic proportional pressure control valve in response to the load of the electric motor 32.
Inventors:
TOMITA YASUKIMI
Application Number:
JP14440598A
Publication Date:
December 07, 1999
Filing Date:
May 26, 1998
Export Citation:
Assignee:
NIPPON SHARYO SEIZO KK
International Classes:
E21B3/02; (IPC1-7): E21B3/02
Attorney, Agent or Firm:
Tsutomu Adachi (1 person outside)