Global Patent Index - EP 1071895 A1

EP 1071895 A1 2001-01-31 - DOUBLE GAS SEAL WITH COPLANAR PAD FACES

Title (en)

DOUBLE GAS SEAL WITH COPLANAR PAD FACES

Title (de)

DOPPELTE GLEITRINGDICHTUNG MIT KOPLANAREN GLEITFLÄCHEN

Title (fr)

JOINT D'ETANCHEITE DOUBLE POUR GAZ A SURFACES D'ETANCHEITE COPLANAIRES

Publication

EP 1071895 A1 (EN)

Application

EP 99912422 A

Priority

  • US 9905319 W
  • US 7904598 P

Abstract (en)

[origin: WO9949244A1] A double gas pressure seal (10) is provided for sealing between a stationary housing (14) and a rotary housing (26). The gas pressure seal includes a stationary ring (42) and a rotary ring (40) each having a radially inner sealing face and a radially outer sealing face. A biasing spring (56) biases one of the rings toward the other ring. An annular groove (68) is provided in one of the rings, with the groove being spaced between the radially inner sealing faces and radially outer sealing faces. A supply port (84) supplies pressurised gas to the annular groove at a pressure higher than the process fluid in the stationary housing. A plurality of radially inner and radially outer recesses (94, 96) are provided on the one of the rings, and corresponding feed channels (98, 100) fluidly interconnect the annular groove with a rotary leading portion of each respective recess. A small quantity of pressurized gas escapes between the inner sealing faces to atmosphere and between the outer sealing faces to the process fluid sealed in the stationary housing.

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

F16J 15/34

IPC 8 full level (invention and additional information)

F16J 15/34 (2006.01)

CPC (invention and additional information)

F16J 15/3412 (2013.01); F16J 15/348 (2013.01)

Citation (search report)

See references of WO 9949244A1

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 9949244 A1 19990930; AU 3079999 A 19991018; CA 2325475 A1 19990930; EP 1071895 A1 20010131; MX PA00009286 A 20020508

INPADOC legal status


2003-04-23 [18D] DEEMED TO BE WITHDRAWN

- Effective date: 20021001

2001-01-31 [17P] REQUEST FOR EXAMINATION FILED

- Effective date: 20001013

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

- Kind Code of Ref Document: A1

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