US 9,810,329 B2
Valve group and inlet module of a valve group
Frede Callesen, Odnense S. (DK)
Assigned to Danfoss Power Solutions ApS, Nordborg (DK)
Filed by Danfoss Power Solutions ApS, Nordborg (DK)
Filed on Oct. 20, 2015, as Appl. No. 14/887,513.
Claims priority of application No. 14193200 (EP), filed on Nov. 14, 2014.
Prior Publication US 2016/0138724 A1, May 19, 2016
Int. Cl. F15B 11/16 (2006.01); F16K 11/06 (2006.01); F15B 20/00 (2006.01); F16K 27/04 (2006.01); F16K 31/02 (2006.01); G05D 7/06 (2006.01); F15B 13/08 (2006.01); F15B 19/00 (2006.01); F15B 13/04 (2006.01)
CPC F16K 11/06 (2013.01) [F15B 13/086 (2013.01); F15B 19/005 (2013.01); F15B 20/008 (2013.01); F16K 27/04 (2013.01); F16K 31/02 (2013.01); G05D 7/0635 (2013.01); F15B 11/161 (2013.01); F15B 11/165 (2013.01); F15B 2013/0413 (2013.01); F15B 2211/6306 (2013.01); F15B 2211/6309 (2013.01); F15B 2211/857 (2013.01); F15B 2211/87 (2013.01)] 16 Claims
OG exemplary drawing
 
1. A valve group comprising an inlet module and at least one service module connected to said inlet module, said inlet module having a housing, a pressure port (PP), a pressure gallery (PG), a tank port (TP), a tank gallery (TG), a load sensing port (LS), a high pressure carry over port (HPCO) and a spool movable in said housing to interrupt in a first position (A) a connection between said pressure port (PP) and said pressure gallery (PG) and to connect in a second position (B) said pressure port (PP) and said pressure gallery (PG), wherein said spool in said first position (A) connects said pressure gallery (PG) and said tank gallery (TG), wherein a first pressure transducer is provided to detect a first pressure in said pressure gallery (PG) and a second pressure transducer is provided to detect a second pressure in said tank gallery (TG), said first pressure transducer and said second pressure transducer being connected to a controller determining the position of said spool to be said first position (A) when said first transducer and said second transducer read a same pressure below a predetermined first threshold pressure and to be said second position (B) when said first pressure transducer reads a higher pressure than said second pressure transducer, wherein said spool comprises a first groove and a second groove on the outside, and a channel inside, wherein in said first position said first groove connects said pressure gallery (PG) and said tank gallery (TG) and said second groove connects said tank gallery (TG) and said tank port (TP), and said channel connects said load sensing port (LS), said high pressure carry over port (HPCO) and said tank port (TP).