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Patent Searching and Data


Title:
HYDRAULIC PRESSURE CONTROL DEVICE FOR SWING MOTOR FOR CONSTRUCTION MACHINERY
Document Type and Number:
WIPO Patent Application WO/2013/111950
Kind Code:
A1
Abstract:
The present invention relates to a hydraulic pressure control device for a swing motor for construction machinery. The hydraulic pressure control device for a swing motor according to the present invention is controlled to open a bypass cut valve unit (26) for a set period of time when a swing control valve unit (22) is operated so that a working fluid standing by upstream of the bypass cut valve unit (26) is supplied to a swing motor (30) through a makeup line (43), and to close the bypass cut valve unit (26) when the set period of time elapses.

Inventors:
LEE BONGJIN (KR)
LIM HYUNSIK (KR)
THO YONGHO (KR)
SHIN KYUNGYONG (KR)
Application Number:
KR2013/000087
Publication Date:
August 01, 2013
Filing Date:
January 07, 2013
Export Citation:
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Assignee:
DOOSAN INFRACORE CO LTD (KR)
International Classes:
F15B13/02; E02F9/22
Foreign References:
JPH10204926A1998-08-04
JP2011085198A2011-04-28
JPH04292399A1992-10-16
JPH07257206A1995-10-09
JP2006082767A2006-03-30
Other References:
See also references of EP 2808561A4
None
Attorney, Agent or Firm:
HANBEOT PATENT LAW FIRM (KR)
특허법인 한벗 (KR)
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Claims: