Global Patent Index - EP 1058060 A1

EP 1058060 A1 2000-12-06 - A valve unit for modulating the delivery pressure of a gas

Title (en)

A valve unit for modulating the delivery pressure of a gas

Title (de)

Ventileinheit zur Regelung des Gas-Versorgungsdruckes

Title (fr)

Arrangement de soupapes pour réguler la pression d'alimentation d'un gaz

Publication

EP 1058060 A1 (EN)

Application

EP 99120258 A

Priority

IT PD990121 A

Abstract (en)

A valve unit for modulating the delivery pressure of a gas comprises a servo-valve (4) having a closure member (5) with diaphragm control (8), the diaphragm (8) being subjected, on one side, to the gas-delivery pressure and, on the other side, to a control pressure (Pt) established in a control chamber (9) of the servo-valve (4), a pressure-regulation device associated with the servo-valve (4) and comprising a modulation valve (10;51) for modulating the control pressure and consequently the gas-delivery pressure, actuator means for the operative control of the modulation valve (10;51), and a circuit (39) for driving the actuator means. The driver circuit (39) comprises means for generating an operative modulation-valve driving signal (S) of constant frequency, with a preselected period (T), and means for duration modulation of the signal amplitude within the period (T) so as to modulate the control pressure (Pt) in a proportionally correlated manner. <IMAGE>

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

F23N 5/10; F23N 1/00

IPC 8 full level (invention and additional information)

F23N 1/00 (2006.01); F23N 5/10 (2006.01)

CPC (invention and additional information)

F23N 5/102 (2013.01); F23N 1/005 (2013.01); F23N 5/10 (2013.01); F23N 2027/22 (2013.01); F23N 2029/16 (2013.01); F23N 2035/20 (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

EP 1058060 A1 20001206; IT 1308113 B1 20011129; IT PD990121 A1 20001204

INPADOC legal status


2002-05-23 [REG DE 8566] DESIGNATED COUNTRY DE NOT LONGER VALID

2002-04-17 [18D] DEEMED TO BE WITHDRAWN

- Effective date: 20010607

2001-08-22 [AKX] PAYMENT OF DESIGNATION FEES

2000-12-06 [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

2000-12-06 [AX] REQUEST FOR EXTENSION OF THE EUROPEAN PATENT TO

- Free text: AL;LT;LV;MK;RO;SI