Global Patent Index - EP 1003659 A1

EP 1003659 A1 2000-05-31 - VACUUM BRAKE BOOSTER

Title (en)

VACUUM BRAKE BOOSTER

Title (de)

UNTERDRUCK-BREMSKRAFTVERSTÄRKER

Title (fr)

SERVO FREIN A DEPRESSION

Publication

EP 1003659 A1 (DE)

Application

EP 97943818 A

Priority

EP 9704594 W

Abstract (en)

[origin: WO9910216A1] In the control valve (28) of a vacuum brake booster a feeler piston (36), which can be axially closed by means of the entry member (34), is positioned, which is housed in a guide bushing (42) fixed in the control valve housing (30) and firmly joined with a stop bolt (66) extending in a transverse direction. The stop bolt (66) projects radially outward from the guide bushing (42) through a slot (68) embodied therein and into an aeration channel (62) of the control valve housing (30) which when a first valve seat (48) is open links the working chamber (26) with a pressure which is at least equivalent to atmospheric pressure. To improve the flow of air through the aeration channel (62) edges of the slot (68) present in the guide bushing (42) form stop elements for an axial displacement of the stop bolt (66). In the area in which the stop bolt (66) projects into the aeration channel (62) the latter is positioned at an angle to the working chamber (26) and has an axial extension which is significantly greater than the axial extension of the slot (68).

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

B60T 13/52; B60T 13/57

IPC 8 full level (invention and additional information)

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

CPC (invention and additional information)

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

Citation (search report)

See references of WO 9910216A1

Designated contracting state (EPC)

DE ES FR GB IT

EPO simple patent family

WO 9910216 A1 19990304; EP 1003659 A1 20000531; JP 2001514114 A 20010911; US 6212993 B1 20010410

INPADOC legal status


2002-11-27 [18D] DEEMED TO BE WITHDRAWN

- Effective date: 20020301

2000-05-31 [17P] REQUEST FOR EXAMINATION FILED

- Effective date: 20000215

2000-05-31 [AK] DESIGNATED CONTRACTING STATES:

- Kind Code of Ref Document: A1

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