Hydraulic circuit for construction equipment

Details Hydraulic circuit for construction equipment Hydraulic circuit for construction equipment

2008-03-19

2010-11-30

Leslie, Michael (Department: 3745)

Power plants

Pressure fluid source and motor

Having condition responsive control in a system of distinct...

C060S484000, C060S486000

Reexamination Certificate

active

07841175

ABSTRACT:
A hydraulic circuit for construction equipment is disclosed, which can prevent an abrupt rotation of a swing device when a switching valve for the swing device is shifted in a state that switching valves for a traveling device and a working device have been shifted.

REFERENCES:
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patent: 6148548 (2000-11-01), Tohji
patent: 6430922 (2002-08-01), Tohji
patent: 7721538 (2010-05-01), Koo
patent: 2003/0089106 (2003-05-01), Ioku et al.
patent: 2004/0154294 (2004-08-01), Jeon
patent: 1 598 561 (2005-11-01), None
patent: 4-203033 (1992-07-01), None
Patent Abstracts of Japan of JP 4-203033 dated Jul. 23, 2992.

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