(19)
(11) EP 1 918 593 A3

(12) EUROPEAN PATENT APPLICATION

(88) Date of publication A3:
11.08.2010 Bulletin 2010/32

(43) Date of publication A2:
07.05.2008 Bulletin 2008/19

(21) Application number: 07119211.6

(22) Date of filing: 24.10.2007
(51) International Patent Classification (IPC): 
F15B 20/00(2006.01)
E02F 9/00(2006.01)
E02F 3/36(2006.01)
(84) Designated Contracting States:
AT BE BG CH CY CZ DE DK EE ES FI FR GB GR HU IE IS IT LI LT LU LV MC MT NL PL PT RO SE SI SK TR
Designated Extension States:
AL BA HR MK RS

(30) Priority: 01.11.2006 JP 2006297792

(71) Applicant: KOBELCO CONSTRUCTION MACHINERY CO., LTD.
Hiroshima-shi, Hiroshima 731-0138 (JP)

(72) Inventors:
  • Yamasaki, Takanori c/o KOBELCO CON. MACH. CO., LTD
    Hiroshima-shi Hiroshima 731-0138 (JP)
  • Koga, Nobuhiro c/o KOBELCO CON. MACH. CO., LTD
    Hiroshima-shi Hiroshima 731-0138 (JP)

(74) Representative: TBK-Patent 
Bavariaring 4-6
80336 München
80336 München (DE)

   


(54) Depressurization apparatus for hydraulic pipe and hydraulic pipe structure


(57) A depressurization block (8) is provided lying over a plurality of hydraulic pipes (3 and 4). The depressurization block (8) is provided with main passages to which the pipes (3 and 4) are connected, depressurization valves (10) for removing oil on the inside of the pipes by an opening operation from the exterior, and a drain passage for joining and guiding the oil removed from the depressurization valves (10), and the oil in all the pipes (3 and 4) is all removed to the exterior. An opening operation is performed to operation elements of the depressurization valves (10) at the same time by a push plate having protrusions and the operation elements are held in an opening state.







Search report