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(12) PATENT APPLICATION PUBLICATION
(19) INDIA (21) APPLICATION No:
1559/MAS/1998A
(22) Date of filing of Application: 13/07/1998 (43) Publication Date: 09/06/2006
(54) Title of the invention:
(71) Name of Applicant
PISTON PUMP
(51)International classification: FO4B 39/10
(31) Priority Document No.09/269,093
(32) Priority Date: 18/03/1999
(33) Name of priority country: USA
(87) WIPO No.: PCT/EP98/02474
(61) Patent of addition to
Application No.:
Filed on:
(62) Divisional to
Application No.:
Filed on:
GUSTAV KLAUKE GMBH
Address of Applicant:
AUF DEM KNAPP 46,
D-42855 REMSCHEID,
GERMANY.
(72) Name of the Inventor(s):
EGBERT FRENKEN
(57) Abstract
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 lowpressure
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 rle1ivery 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 (1.0), 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.
The Patent Office Journal 09/06/2006 10801