Login| Sign Up| Help| Contact|

Patent Searching and Data


Title:
FLUID OPERATING TYPE MOTOR
Document Type and Number:
Japanese Patent JPH0280803
Kind Code:
A
Abstract:

PURPOSE: To ensure good frequency dynamic characteristic by connecting numbers of piezoelectric pump elements as a pumping device to both fluid chambers of a cylinder through two check valves respectively functioning oppositely.

CONSTITUTION: Conveyance chambers 14 to 17 of pump elements 10 to 13 are connected to fluid chambers 4, 4' bordered by the piston 2 of a cylinder casing through two check valves 10a, 10b; 11a, 11b; 12a, 12b; 13a, 13b functioning in the opposite directions. For example, the pump element 10 is controlled to make delivery strokes by the piston 2 aparting from the terminal position and starting from the state of being in a midway position and the pump element 11 to make an intake stroke, while conveyance chambers 16, 17 become ignorably minimum volume with pump elements 12, 13 extended to their maximum. Thus the motor invented by this invention includes excellent oscillation characteristic even under high oscillation frequency.


Inventors:
Pohl, Andreas
Application Number:
JP1989000195370
Publication Date:
March 20, 1990
Filing Date:
July 27, 1989
Export Citation:
Click for automatic bibliography generation   Help
Assignee:
CARL SCHENCK AG
International Classes:
F15B7/00; F15B15/18; (IPC1-7): F15B15/18



 
Next Patent: ASSEMBLY UNIT