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Patent Searching and Data


Title:
PULSE REDUCTION DEVICE
Document Type and Number:
Japanese Patent JPH09184592
Kind Code:
A
Abstract:

To arrange a resonance room for reducing the pulse of a low frequency and an expansion room resonance room for reducing the pulse frequency in a comparatively wide range commonly without enlarging an entire structure by that the resonance room can be constituted in a small shape.

A cylindrical casting 6 is closed by a cover 7 after the insertion of a sleeve 8. Expansion rooms 86, 66 are formed by the recessed part 81 of the sleeve 8 and the right side cylindrical space of the casing 6. A through hole for communicating partition wall with an oil passage 82 and a groove 83 is installed on one part of the groove 83 of the sleeve 8 and a resonance room is formed by the space surrounded by the groove 83 and the inner surface of the casing 6. As the resonance room is a shape running along the groove 83, a long resonance room can be formed without enlarging an entire constitution, Therefore, the resonance room of a low decreasing frequency and the expansion room of the decreasing frequency with a wide area can be constituted compactly.


Inventors:
Sakairi, Tetsuya
Goto, Yasuharu
Motosawa, Yukihiro
Yuasa, Kazumasa
Nakamura, Shigetaka
Application Number:
JP1996000000295
Publication Date:
July 15, 1997
Filing Date:
January 05, 1996
Export Citation:
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Assignee:
HITACHI CONSTR MACH CO LTD
International Classes:
F04B39/00; F16L55/04; (IPC1-7): F16L55/04; F04B39/00
Attorney, Agent or Firm:
武 顕次郎 (外1名)