Part-I - Controller General of Patents Designs and Trademarks

(12) PATENT APPLICATION PUBLICATION (21) Application No.1679/CHE/2011 A
(19) INDIA
(22) Date of filing of Application :18/05/2011 (43) Publication Date : 21/06/2013
(54) Title of the invention : A LOAD DETECTION VALVE FOR THE LIFT AXLE CONTROL SYSTEM OF A MOTOR
VEHICLE
(51) International classification :F01L
(31) Priority Document No :NA
(32) Priority Date :NA
(33) Name of priority country :NA
(86) International Application No
:NA
Filing Date
:NA
(87) International Publication No : NA
(61) Patent of Addition to Application Number :NA
Filing Date
:NA
(62) Divisional to Application Number
:NA
Filing Date
:NA
(71)Name of Applicant :
1)WABCO-TVS (INDIA) LIMITED
Address of Applicant :PLOT NO.3 (SP) THIRD MAIN
ROAD,INDUSTRIAL ESTATE, AMBATTUR, CHENNAI -
600 058 Tamil Nadu India
(72)Name of Inventor :
1)SUNDARAMAHALINGAM SELVAMANI
2)NARAYANAN SREENIVASAN
3)ARUMUGHAM GANESAMOORTHY
4)SYED AZHAR JIFRI
(57) Abstract :
A load detection valve for the lift axle control system of a motor vehicle comprising a cam for rotating in relationship to vehicle
load; a graduating spring load variable by adjusting means; a split piston arrangement below which the delivery pressure acts
against the graduating spring load; a bonded valve housed within the split piston arrangement; a cam follower for maintaining
contact with the cam and actuating the bonded valve, such that when the load acting due to the delivery pressure, below the split
piston, equals the graduating spring load, the bonded valve attains balanced position, providing the required delivery pressure
corresponding to the vehicle load; the maximum delivery pressure being adjustable on varying the graduating spring load by the
said means, thus integrating the function of a pressure reduction valve and a load sensing valve in the said load detection valve.
No. of Pages : 20 No. of Claims : 4
The Patent Office Journal 21/06/2013 13881