|국가/구분||United States(US) Patent 등록|
|미국특허분류(USC)||251/036 ; 251/044 ; 251/063.6 ; 137/489 ; 137/492.5|
|발명자 / 주소|
|출원인 / 주소|
|대리인 / 주소||
|인용정보||피인용 횟수 : 5 인용 특허 : 11|
A two-port cartridge type seat valve has a valve sleeve with a stepped guide bore for a poppet. The poppet includes a piston flange that divides the second step of the guide bore axially into an end-face first pilot chamber and an annular second pilot chamber. A first connection channel through the valve sleeve connects the annular second pilot chamber with an annular chamber into which a lateral main flow port opens. The free cross-section of a valve seat and of an axial main flow bore correspond approximately to the cross-section of the first step of t...
[ What is claimed is:] [4.] A two-port cartridge type seat valve for use in a hydraulic manifold having a stepped bore closed at one end by a valve cover having a pilot bore communicating with a source of pilot pressure, a first main flow channel, a second main flow channel, a first bore step of the stepped bore being coupled to the first main flow channel and a second bore step, of larger diameter than the first bore step, being coupled to the second main flow channel, said valve to be disposed in the stepped bore between the valve cover and the first m...