Global Patent Index - EP 1034374 A4

EP 1034374 A4 2001-01-31 - ROTARY PISTON PUMP AND METHOD OF OPERATION

Title (en)

ROTARY PISTON PUMP AND METHOD OF OPERATION

Title (de)

ROTATIONSKOLBENPUMPE UND VERFAHREN ZU IHREM BETRIEB

Title (fr)

POMPE ROTATIVE A PISTONS ET PROCEDE DE FONCTIONNEMENT

Publication

EP 1034374 A4 (EN)

Application

EP 98961704 A

Priority

  • NZ 9800175 W
  • NZ 32927497 A

Abstract (en)

[origin: WO9928629A1] A work unit, such as a blower, compressor, supercharger or engine is shown with a main shaft (1) and a pair of pistons (3) mounted on respective shafts (4). The main shaft (1) and the shafts (4) are connected by suitable gearing to hold the pistons (3) in a stationary orientation relative to the axis of the main shaft (1) and the housing (5). The main shaft (1) has a pair of opposed part cylindrical recesses (55) to accommodate the respective pistons (3). The arcuate surfaces (R4) of the pistons (3) cooperate with the concentric arcuate surface (R5) of the shaft (1). As the shaft (1) rotates, the edges or tips (48) of the pistons (3) can cooperate with the respective top and bottom arcuate surfaces (R1, R2) of the inner surface (49) of the housing (5) on either side of the blades (53, 54), while the external arcuate surfaces (R4) of the piston (3) can cooperate with the concentric arcuate surfaces (R3) of the internal surface (49) of the housing (5).

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

F01C 1/36

IPC 8 full level (invention and additional information)

F02B 53/00 (2006.01); F01C 1/063 (2006.01); F01C 1/36 (2006.01); F04C 18/00 (2006.01)

CPC (invention and additional information)

F01C 1/36 (2013.01)

Citation (search report)

Designated contracting state (EPC)

AT BE CH CY DE DK ES FI FR GB GR IE IT LI LU MC NL PT SE

EPO simple patent family

WO 9928629 A1 19990610; AU 1696799 A 19990616; AU 737023 B2 20010809; EP 1034374 A1 20000913; EP 1034374 A4 20010131; JP H11182201 A 19990706; ZA 9810871 B 19990527

INPADOC legal status


2002-12-11 [18D] DEEMED TO BE WITHDRAWN

- Ref Legal Event Code: 18D

- Effective date: 20020601

2001-01-31 [A4] SUPPLEMENTARY SEARCH REPORT

- Ref Legal Event Code: A4

- Effective date: 20001215

2001-01-31 [AK] DESIGNATED CONTRACTING STATES:

- Ref Legal Event Code: AK

- Designated State(s): AT BE CH CY DE DK ES FI FR GB GR IE IT LI LU MC NL PT SE

2001-01-31 [RIC1] CLASSIFICATION (CORRECTION)

- Ref Legal Event Code: RIC1

- Free Format Text: 7F 01C 1/36 A

2000-09-13 [17P] REQUEST FOR EXAMINATION FILED

- Ref Legal Event Code: 17P

- Effective date: 20000616

2000-09-13 [AK] DESIGNATED CONTRACTING STATES:

- Ref Legal Event Code: AK

- Designated State(s): AT BE CH CY DE DK ES FI FR GB GR IE IT LI LU MC NL PT SE