Title:
MULTISTAGE HYDRAULIC CYLINDER
Document Type and Number:
Japanese Patent JPH04254005
Kind Code:
A
Abstract:
PURPOSE: To provide a multistage hydraulic cylinder which can avoid the generation of abnormal high pressure so as to prevent breakage of a cylinder tube even if the operating order of a piston is disturbed so that a communicating hole of a rod is closed by an inside piston.
CONSTITUTION: The first piston having the first tubular rod 15 is provided in a cylinder tube 12, the second piston 16 having the second tubular rod 17 is provided in the first rod 15, and a communicating hole 23 and an escape hole 24 are bored at a space therebetween more than the axial length of the second piston 16 in the first rod 15.
Inventors:
NOMURA TOSHIO
Application Number:
JP3129591A
Publication Date:
September 09, 1992
Filing Date:
February 01, 1991
Export Citation:
Assignee:
KOYO PRECISION MFG
International Classes:
F15B15/16; (IPC1-7): F15B15/16
Attorney, Agent or Firm:
Fukuda Takemichi (3 outside)