Login| Sign Up| Help| Contact|

Patent Searching and Data


Title:
PRESSURE OIL PULSATION REDUCTION DEVICE
Document Type and Number:
Japanese Patent JPH0942576
Kind Code:
A
Abstract:

To provide a pressure oil pulsation reduction device which can reduce pulsation in the range of both frequencies of odd number times and even number times as much as a specified frequency.

In a pressure oil pulsation reduction device reducing pressure oil pulsation which is developed by a hydraulic pump 1 so as to be propagated in the inside of a main pipe line 2, an auxiliary side branch 4 is branched out of a main side branch 3 branched out of the main pipe line 2. Let pressure oil pulsation propagated in the inside of the main pipe line 2 be propagated into the passage 3b of the main side branch 3, and a part of pressure oil pulsation propagated into the passage 3b is reflected by the reflecting surface 3a of the main side branch, concurrently, let that part be propagated into the passage 4b of the auxiliary side branch by way of the upstream side of the passage 3b of the main side branch so as to be reflected by its reflecting surface 4a, and let these pressure oil pulsations reflected by these reflecting surfaces 3a and 4a be interfered with pressure oil pulsation to be propagated into the main pipe line 2. By this constitution, pressure oil pulsation in the range of both the frequencies of odd number times and even number times as much as a specified frequency, can thereby be reduced.


Inventors:
Takeshita, Seiichiro
Application Number:
JP1995000190450
Publication Date:
February 14, 1997
Filing Date:
July 26, 1995
Export Citation:
Click for automatic bibliography generation   Help
Assignee:
HITACHI CONSTR MACH CO LTD
International Classes:
F04B11/00; F04C28/00; F16L55/04; (IPC1-7): F16L55/04; F04B11/00; F04C29/10
Attorney, Agent or Firm:
武 顕次郎 (外2名)