Title:
【発明の名称】複式ピストン表面を有するアクチュエータ
Document Type and Number:
Japanese Patent JP2003535295
Kind Code:
A
Abstract:
A pressurized-fluid-operated actuator has two piston surfaces for providing increased output force. The actuator includes a hollow piston that is divided into two inner chambers by a stationary inner dividing wall that is rigidly connected with a cylinder end wall. The piston has an outer diameter that is smaller than the inner diameter of the cylinder, and the piston carries three axially spaced sealing rings that define two axially-spaced annular chambers between the piston and the cylinder. Each of the annular chambers is in fluid communication with a respective port provided in the cylinder wall. Introduction of pressurized fluid into one port causes the fluid pressure to act on a single piston surface to retract the piston and rod, and introduction of pressurized fluid into the other port causes the fluid pressure to act on two axially-spaced piston surfaces to provide an increased output force without increasing the diameter of the cylinder and piston and without increasing the pressure of the fluid.
Inventors:
Staille, Frederick
Lawrence Jay, Navarre
Hugo, Douglas
Lawrence Jay, Navarre
Hugo, Douglas
Application Number:
JP2002501640A
Publication Date:
November 25, 2003
Filing Date:
June 01, 2001
Export Citation:
Assignee:
D-M-E Company
International Classes:
B29C45/28; B29C45/30; F15B11/036; F15B15/14; (IPC1-7): F15B15/14; B29C45/30
Attorney, Agent or Firm:
Kazuo Shamoto (5 outside)