Title:
HYDRAULIC DRIVING DEVICE
Document Type and Number:
Japanese Patent JPS60179503
Kind Code:
A
Abstract:
PURPOSE:To prevent damage to a machine body by interposing pilot type relief valves on the lines for connecting the oil inlet to the oil outlet of a hydraulic motor, and by furnishing an opening/closing valve in the vent circuit of these relief valves. CONSTITUTION:Pilot type relief valves 30, 31 are interposed on the lines 34, 35 for connecting the oil inlet to the oil outlet of a hydraulic motor 8, having a mechanical brake 12, while the vent circuit 32 of these relief valves 30, 31 are equipped with an opening/closing valve 33. Accordingly when the mechanical brake 12 is applied, the relief valves 30, 31 can be put in unloaded state through opening said opening/closing valve 33, so that no hydraulical locking force will act on the above-mentioned hydraulic motor 8, thus preventing any damage to the machine body.
Inventors:
MIKI MASATOSHI
TODA KATSUAKI
TODA KATSUAKI
Application Number:
JP3424484A
Publication Date:
September 13, 1985
Filing Date:
February 27, 1984
Export Citation:
Assignee:
MITSUBISHI HEAVY IND LTD
International Classes:
F15B11/08; (IPC1-7): F15B11/08
Domestic Patent References:
| JPS5333115U | 1978-03-23 | |||
| JP51116395B |
Attorney, Agent or Firm:
Shigefumi Okamoto (2 others)