EP 0927305 A1 19990707 - PISTON PUMP
Title (en)
PISTON PUMP
Title (de)
KOLBENPUMPE
Title (fr)
POMPE A PISTONS
Publication
Application
Priority
- DE 19731054 A 19970719
- DE 19743747 A 19971002
- EP 9802474 W 19980425
Abstract (en)
[origin: US6206663B1] The invention relates to a piston pump (1) for delivering a fluid at low pressure and at a higher pressure, a higher delivery volume being provided in one pumping cycle at low pressure than at a higher pressure, having a low-pressure delivery piston (4), which is moved inside a pump cylinder (2) and acts upon a pressure chamber (7) under prestress into its delivery end position, a high-pressure delivery piston (11), an inlet valve (9) and an outlet valve (9, 10), a fluid delivery path (5) furthermore being provided between the inlet valve (9) and the outlet valve (10), and the low-pressure delivery piston (4) being able to be moved back counter to its prestress into a delivery starting position, and proposes, to achieve effective delivery at low pressure and at a higher pressure with the simplest possible construction, that the fluid delivery path (5) passes through the low-pressure delivery piston (4), that a valve (6) is provided in the low-pressure delivery piston (4), which valve shuts in the case of movement into the delivery starting position, that the high-pressure delivery piston (11) and the low-pressure delivery piston (4) operate in a common pressure chamber (7), and that the high-pressure delivery piston (11) moves the low-pressure delivery piston (4) counter to its prestress.
IPC 1-7
IPC 8 full level
F04B 1/00 (2006.01); F04B 1/34 (2006.01); F04B 3/00 (2006.01); F04B 5/00 (2006.01); H01R 43/042 (2006.01)
CPC (source: EP US)
F04B 3/00 (2013.01 - EP US); F04B 5/00 (2013.01 - EP US); H01R 43/0427 (2013.01 - EP US)
Citation (search report)
See references of WO 9904165A1
Designated contracting state (EPC)
AT BE CH CY DE DK ES FI FR GB GR IE IT LI LU MC NL PT SE
DOCDB simple family (publication)
US 6206663 B1 20010327; AT E231217 T1 20030215; AU 7649598 A 19990210; DK 0927305 T3 20030505; EP 0927305 A1 19990707; EP 0927305 B1 20030115; ES 2187973 T3 20030616; JP 2001504909 A 20010410; JP 4138897 B2 20080827; TW 401484 B 20000811; WO 9904165 A1 19990128
DOCDB simple family (application)
US 26909399 A 19990318; AT 98924218 T 19980425; AU 7649598 A 19980425; DK 98924218 T 19980425; EP 9802474 W 19980425; EP 98924218 A 19980425; ES 98924218 T 19980425; JP 50619899 A 19980425; TW 87111210 A 19980710