Title:
SHOCK PREVENTION DEVICE FOR WORKING MACHINE IN CONSTRUCTION EQUIPMENT
Document Type and Number:
Japanese Patent JPS6330601
Kind Code:
A
Abstract:
PURPOSE: To prevent the shock in a lifting or lowering operation of a working machine, by providing a shock prevention cylinder on the way of a passage to a working cylinder.
CONSTITUTION: A shock prevention cylinder 37 including a piston 39 is located on the way of a circuit to a hydraulic cylinder 26. One hydraulic chamber A of the shock prevention cylinder 37 is communicated through an oil passage (a) to a passage 25, and the other oil chamber B is communicated through an oil passage (b) to a passage 28. Accordingly, the piston 39 is moved in response to an increase and a decrease in oil pressure in the passages 25 and 28, thereby absorbing the shock in a lifting or lowering operation of a working machine.
Inventors:
UMEMOTO TOKUICHI
DOI FUMIO
NOZAKI TAKEAKI
DOI FUMIO
NOZAKI TAKEAKI
Application Number:
JP17213786A
Publication Date:
February 09, 1988
Filing Date:
July 21, 1986
Export Citation:
Assignee:
YANMAR DIESEL ENGINE CO
International Classes:
F15B11/00; E02F9/00; E02F9/22; (IPC1-7): E02F9/00; F15B11/00
Domestic Patent References:
| JP52070293B | ||||
| JP57105361B |
Attorney, Agent or Firm:
Hisayuki Tarumoto
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