IPC분류정보
국가/구분 |
United States(US) Patent
등록
|
국제특허분류(IPC7판) |
|
출원번호 |
US-0819715
(1992-01-13)
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발명자
/ 주소 |
- Stephenson Dwight B. (Savage MN) Draper Don R. (Chanhassen MN)
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출원인 / 주소 |
- Eaton Corporation (Cleveland OH 02)
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인용정보 |
피인용 횟수 :
6 인용 특허 :
0 |
초록
▼
A fluid controller (11) is disclosed of the type including a housing (13), a fluid meter (17), a primary (spool) valve (35), and a follow-up (sleeve) valve (37). An inlet port (23) is in communication with a series of fluid ports (85), and operating ports (91L and 91R) are in communication with the
A fluid controller (11) is disclosed of the type including a housing (13), a fluid meter (17), a primary (spool) valve (35), and a follow-up (sleeve) valve (37). An inlet port (23) is in communication with a series of fluid ports (85), and operating ports (91L and 91R) are in communication with the cylinder ports (27 and 29). Rotation of the spool relative to the sleeve causes axial displacement of the sleeve as a result of the configuration of a pin opening (55) in which a drive pin (53) is disposed. After a certain amount of axial movement of the sleeve, the various ports (85,91L,91R) begin to communicate with a pair of meter grooves (67R and 67L) and a tank groove (71R), respectively, to define variable axial flow control orifices (A1a,A4a,A5a).
대표청구항
▼
A controller operable to control the flow of fluid from a source of pressurized fluid to a fluid pressure operated device; said controller being of the type including housing means defining an inlet port for connection to the source of pressurized fluid, a return port for connection to a reservoir,
A controller operable to control the flow of fluid from a source of pressurized fluid to a fluid pressure operated device; said controller being of the type including housing means defining an inlet port for connection to the source of pressurized fluid, a return port for connection to a reservoir, and first and second control fluid ports for connection to the fluid pressure operated device; valve means disposed in said housing means, and comprising a primary, rotatable valve member and a cooperating, relatively rotatable, follow-up valve member, said primary and follow-up valve members defining a neutral position, and a first operating position in which said primary valve member is rotatably displaced from said neutral position, relative to said follow-up valve member in a first direction; said primary valve member defining first and second fluid passages, and said follow-up valve member defining first and second fluid ports in continuous fluid communication with said inlet port, and said first control fluid port, respectively; said first and second fluid ports being blocked from fluid communication with said first and second fluid passages, respectively, when said valve members are in said neutral position, and said first and second fluid ports being in fluid communication with said first and second fluid passages, respectively, when said valve members are in said first operating position; said housing means and said valve members cooperating to define a first main fluid path providing fluid communication from said inlet port to said first control fluid port, and from said second control fluid port to said return port, when said valve members are in said first operating position; characterized by: (a) means operable, in response to relative rotational displacement of said primary and follow-up valve members, to move said follow-up valve member in a first axial direction to said first operating position; (b) said first and second fluid ports cooperating with said first and second fluid passages, respectively, to define first and second variable axial flow control orifices, respectively, when said follow-up valve member is axially displaced to said first operating position; and (c) said first main fluid path including said first and second variable axial flow control orifices.
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