|국가/구분||United States(US) Patent 등록|
|미국특허분류(USC)||137/493 ; 91/420 ; 137/4545 ; 137/495|
|발명자 / 주소|
|출원인 / 주소|
|인용정보||피인용 횟수 : 2 인용 특허 : 1|
A control valve that can be used as a pilot-assisted pressure relief valve or as a sequence valve, which is substantially insensitive to system back pressure. The valve comprises a valve body 10 defining a multistep bore 36, and a valve member 44 engageable with a coaxial valve seat 46, both supported for reciprocating motion within the bore 36 and cooperating to control the fluid communication between first and second ports 30, 32 defined in the valve body 10. A primary biasing spring 48 enclosed within a vented spring chamber 52 urges the valve member ...
A control valve usable as a sequence valve or a pilot assisted, pressure relieving valve, comprising: (a) a valve body defining a multi-stepped bore and spaced, first and second ports communicating with said bore; (b) an elongate valve member comprising at least two spaced annuli joined by a reduced diameter portion, said annuli supported within said bore for reciprocating, axial motion; (c) one of said annuli defining a poppet valve portion and another of said annuli defining a piston portion and the one annulus being diametrically greater than the othe...