Title:
HYDRAULIC DEVICE FOR DRIVING CONSTRUCTION DEVICE
Document Type and Number:
Japanese Patent JP3535104
Kind Code:
B2
Abstract:
PROBLEM TO BE SOLVED: To obtain driving hydraulic device driving a construction device for preventing the damage of the device or the occurrence of a noise.
SOLUTION: The construction device driving hydraulic device is so constituted that a hydraulic oil is supplied and discharged through a pair of supply and discharge channels 102 and 104 provided with a selector valve 106 to a hydraulic motor 8 rotating a casing tube 10 and that it is inserted in the ground while rotating the casing tube 10. Check valves 24 and 28 for controlling an outflow of the hydraulic oil from the hydraulic motor 8 are provided to a pair of supply and discharge channels 102 and 104 in the case of stopping and, at the same time, throttles 26 and 30 are provided in parallel to the check valves 24 and 28.
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Inventors:
Iwakura, Akira
Application Number:
JP2001023982A
Publication Date:
June 07, 2004
Filing Date:
January 31, 2001
Export Citation:
Assignee:
NIPPON SHARYO SEIZO KAISHA LTD
International Classes:
E02D7/22; E21B3/02; E21B3/035; F15B11/00; (IPC1-7): E02D7/22; E21B3/02; F15B11/00
Other References:
金子敏夫，油圧機器と応用回路−改訂版−，日本，日刊工業新聞社，１９７７年１２月２５日，２４８頁「１０．１．３確実にロックさせる回路」
Attorney, Agent or Firm:
足立 勉