Global Patent Index - EP 1259409 A1

EP 1259409 A1 2002-11-27 - VACUUM BRAKE BOOSTER COMPRISING AN IMPROVED MAGNET-FREE EMERGENCY BRAKE AID SYSTEM

Title (en)

VACUUM BRAKE BOOSTER COMPRISING AN IMPROVED MAGNET-FREE EMERGENCY BRAKE AID SYSTEM

Title (de)

UNTERDRUCK- BREMSKRAFTVERSTÄRKER MIT VERBESSERTER, MAGNETLOSER NOTBREMSHILFE

Title (fr)

SERVOFREIN A DEPRESSION COMPRENANT UN SYSTEME AMELIORE D'AIDE AU FREINAGE D'URGENCE SANS AIMANT

Publication

EP 1259409 A1 (DE)

Application

EP 01927699 A

Priority

  • DE 10010385 A
  • EP 0102092 W

Abstract (en)

[origin: DE10010385A1] Sub-atmospheric pressure brake force amplifier (10) has a sub-atmospheric pressure chamber (16) with a pressure-tight work chamber (18) separated from it by a movable wall (14). A control valve (20) controls with a first valve sealing member (42) the feed of atmospheric pressure or excess pressure to the work chamber (18) dependent upon the displacement of an input member (24) of the brake force amplifier, in order to achieve a pressure difference on the movable wall. A first valve seat (40) is formed on a displaceable valve member (38), which is coupled in the operating direction of the brake force amplifier with the input member. A second valve seat (44), in conjunction with the first valve sealing member, controls a connection between the sub-pressure chamber and the work chamber. The valve member, on its rear side facing the input member, is exposed to the pressure ruling in the work chamber.

[origin: DE10010385A1] Sub-atmospheric pressure brake force amplifier (10) has a sub-atmospheric pressure chamber (16) with a pressure-tight work chamber (18) separated from it by a movable wall (14). A control valve (20) controls with a first valve sealing member (42) the feed of atmospheric pressure or excess pressure to the work chamber (18) dependent upon the displacement of an input member (24) of the brake force amplifier, in order to achieve a pressure difference on the movable wall. A first valve seat (40) is formed on a displaceable valve member (38), which is coupled in the operating direction of the brake force amplifier with the input member. A second valve seat (44), in conjunction with the first valve sealing member, controls a connection between the sub-pressure chamber and the work chamber. The valve member, on its rear side facing the input member, is exposed to the pressure ruling in the work chamber.

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

B60T 13/52; B60T 13/57

IPC 8 full level (invention and additional information)

B60T 8/32 (2006.01); B60T 13/52 (2006.01); B60T 13/57 (2006.01)

CPC (invention and additional information)

B60T 8/3275 (2013.01); B60T 13/52 (2013.01); B60T 13/57 (2013.01)

Citation (search report)

See references of WO 0166398A1

Designated contracting state (EPC)

DE ES FR GB IT

EPO simple patent family

DE 10010385 A1 20010913; DE 10010385 B4 20050616; EP 1259409 A1 20021127; US 2003010193 A1 20030116; US 6711983 B2 20040330; WO 0166398 A1 20010913

INPADOC legal status


2007-09-05 [18D] DEEMED TO BE WITHDRAWN

- Effective date: 20070223

2004-05-12 [RBV] DESIGNATED CONTRACTING STATES (CORRECTION):

- Designated State(s): DE ES FR GB IT

2002-11-27 [17P] REQUEST FOR EXAMINATION FILED

- Effective date: 20020826

2002-11-27 [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 TR