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Patent Searching and Data


Title:
PUMP UNIT
Document Type and Number:
Japanese Patent JP2008031862
Kind Code:
A
Abstract:

To suppress hydraulic pressure pulsation.

An elastic cylindrical damper 100 constituting a main part of the invention is inserted to the inside of a filter 41. The damper 100 has hollow sealed structure made of elastomer resin, and is an elastic vessel in which air is sealed, just like an air spring. Liquid flowing down to a filter chamber 40 is filtered in the process of flowing of the liquid from an outer peripheral side to an inner peripheral side of the filter 41, and then passes through a circumference of the damper 100, thereby flowing out to a flow passage 46. At this time, when the hydraulic pressure pulsation is generated, pressure fluctuation caused by the pulsation is absorbed by elastic deformation of the damper 100 so as to reduce the pulsation of liquid flowing out to the flow passage 46.


Inventors:
TOBE MITSUHIRO
Application Number:
JP2006203200A
Publication Date:
February 14, 2008
Filing Date:
July 26, 2006
Export Citation:
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Assignee:
TOKIKO TECHNO KK
International Classes:
F04B23/00; F04B11/00
Domestic Patent References:
JP2000064955A2000-03-03
JPH08240201A1996-09-17
JPH05229076A1993-09-07
Attorney, Agent or Firm:
Tadahiko Ito