Global patent index - EP 0817916 A4

EP 0817916 A4 2000-05-24 - MULTIPLE PISTON PUMP

Title (en)

MULTIPLE PISTON PUMP

Title (de)

PUMPE MIT MEHREREN KOLBEN

Title (fr)

POMPE A PISTONS MULTIPLES

Publication

EP 0817916 A4 (EN)

Application

EP 96910484 A

Priority

  • US 9603777 W
  • US 40639995 A

Abstract (en)

[origin: WO9629515A1] A reciprocating piston pump (10) provides pulseless delivery of liquid. It is suitable for use in compact environments or for the delivery of small amounts of liquid. The pump includes two pistons (18, 48) with pumping chambers that are alternately connected to inflow and outflow lines through a control valve (100). The control valve moves between a first position in which inflow is directed to the first piston chamber and outflow to the second piston chamber, and a second position in which outflow is directed to the first piston chamber and inflow is directed to the second piston chamber. A rotating cam (80) moves the pistons of the pump and the control valve between their operating positions described above. The cam rotates around an axis that is parallel to the axis of movement of the piston pumps. A control surface is carried by and rotated by the cam in one embodiment.

IPC 1-7 (main, further and additional classification)

F04B 1/14; F04B 1/18

IPC 8 full level (invention and additional information)

F04B 1/14 (2006.01); F04B 1/18 (2006.01); F04B 11/00 (2006.01); F04B 23/06 (2006.01)

CPC (invention and additional information)

F04B 11/0066 (2013.01); F04B 1/14 (2013.01); F04B 1/146 (2013.01); F04B 1/18 (2013.01)

Citation (search report)

Designated contracting state (EPC)

DE FR GB IE IT NL SE

EPO simple patent family

WO 9629515 A1 19960926; CA 2213194 A1 19960926; CA 2213194 C 20040713; EP 0817916 A1 19980114; EP 0817916 A4 20000524; JP H11502581 A 19990302

INPADOC legal status

2003-02-26 [18D] DEEMED TO BE WITHDRAWN

- Ref Legal Event Code: 18D

- Effective date: 20020827

2002-05-29 [17Q] FIRST EXAMINATION REPORT

- Ref Legal Event Code: 17Q

- Effective date: 20020415

2000-05-24 [A4] SUPPLEMENTARY SEARCH REPORT

- Ref Legal Event Code: A4

- Effective date: 20000406

2000-05-24 [AK] DESIGNATED CONTRACTING STATES:

- Ref Legal Event Code: AK

- Designated State(s): DE FR GB IE IT NL SE

2000-05-24 [RIC1] CLASSIFICATION (CORRECTION)

- Ref Legal Event Code: RIC1

- Free Format Text: 7F 04B 1/14 A, 7F 04B 1/18 B

1998-01-14 [17P] REQUEST FOR EXAMINATION FILED

- Ref Legal Event Code: 17P

- Effective date: 19971007

1998-01-14 [AK] DESIGNATED CONTRACTING STATES:

- Ref Legal Event Code: AK

- Designated State(s): DE FR GB IE IT NL SE