EP 1592887 A1 20051109 - HIGH PRESSURE PUMP
Title (en)
HIGH PRESSURE PUMP
Title (de)
HOCHDRUCKPUMPE
Title (fr)
POMPE HAUTE PRESSION
Publication
Application
Priority
- CH 0300802 W 20031204
- CH 2022003 A 20030211
Abstract (en)
[origin: WO2004072477A1] A piston (6) of a piston pump unit (2), which can be displaced in a translatory manner, is guided in a cylinder bore (7). The piston (6) is driven by a crank drive (13) comprising an eccentric element (15) which is arranged on a drive shaft (14). A stroke ring (12) is rotationally mounted on the eccentric element (15) but does not rotate therewith. A sliding surface (10) of the piston (6) is arranged on a sliding bearing surface (11) on the stroke ring (12). A discharge chamber (22) is embodied inside the piston (6) on an end opposite the stroke ring (12). Said discharge chamber is open towards the sliding bearing surface (11). The discharge chamber (22) is connected in a pressure-wise manner to a working chamber (8) by means of a passage (23) in the piston (6). A displaceable control piston (25) is guided in a longitudinal bore (24) pertaining to said passage (23). Said control piston (25) is impinged upon on one side by a medium in the working chamber (8) and on the other front side by a pressure medium in the discharge chamber (22). The control piston (25) separates the medium which is to be transported from the pressure medium in the discharge chamber (22) and ensures that the pressure in the discharge chamber (22) increases if the pressure increases in the working chamber (8). This results in decompression of the sliding bearing between the piston (6) and the stroke ring (12).
IPC 1-7
IPC 8 full level
F04B 1/04 (2006.01); F04B 53/04 (2006.01)
CPC (source: EP US)
F02M 59/102 (2013.01 - EP US); F04B 1/0404 (2013.01 - EP US); F04B 1/0408 (2013.01 - EP US); F04B 1/0413 (2013.01 - EP US); F04B 53/04 (2013.01 - EP US); F02M 2200/16 (2013.01 - EP US)
Citation (search report)
See references of WO 2004072477A1
Designated contracting state (EPC)
AT BE BG CH CY CZ DE DK EE ES FI FR GB GR HU IE IT LI LU MC NL PT RO SE SI SK TR
DOCDB simple family (publication)
WO 2004072477 A1 20040826; AT E355460 T1 20060315; AU 2003281906 A1 20040906; CN 100392241 C 20080604; CN 1748083 A 20060315; DE 50306704 D1 20070412; EP 1592887 A1 20051109; EP 1592887 B1 20070228; EP 1760312 A2 20070307; EP 1760312 A3 20070905; EP 1760312 B1 20130501; JP 2006514195 A 20060427; US 2006062677 A1 20060323; US 2006275164 A1 20061207; US 7108491 B2 20060919
DOCDB simple family (application)
CH 0300802 W 20031204; AT 03773421 T 20031204; AU 2003281906 A 20031204; CN 200380109666 A 20031204; DE 50306704 T 20031204; EP 03773421 A 20031204; EP 06026525 A 20031204; JP 2004568075 A 20031204; US 50311806 A 20060814; US 54400405 A 20050801