Resources Contact Us Home
Flow control valve

Image Number 2 for United States Patent #5706849.

In a flow control valve, a valve spool is movable for variably controlling an opening area of a port portion of a drain passage so that a necessary flow rate of fluid is conducted from a first pressure chamber to an outlet passage through a control orifice while a surplus flow rate of fluid is returned from the first pressure chamber to the drain passage. A movable sleeve is installed in a valve spool accommodation hole and around the valve spool. The movable sleeve has through holes communicable with the drain passage and an inlet passage, respectively. The movable sleeve has a first axial end portion disposed in the first pressure chamber and a second axial end portion disposed in a low pressure chamber. A spring is disposed in the low pressure chamber for urging the movable sleeve toward the first pressure chamber side. The movable sleeve is movable relative to the valve spool in response to a variation of pressure in the first pressure chamber for varying the opening area of the port portion of the drain passage.

  Recently Added Patents
Extensible, filtered lists for mobile device user interface
System and method for optimizing use of plug-in air conditioners and portable heaters
Point-of-sale server and method
Method and system for automatic 3-D image creation
Luminescent nanosheets, and fluorescent illuminators, solar cells and color displays utilizing the same as well as nanosheet paints
Method and apparatus for providing very high throughput operation and capability signaling for wireless communications
Messenger bag
  Randomly Featured Patents
Hydraulically operated engine valve system
Bed headboard
Double beam systems for forming improved holograms
Engine control unit operable under ignition switch turn-off
Editing system for rearranging allocation of information units on an information recording medium
Space saving bed
Nickel-hydrogen secondary battery
A.C. tape reel servo
Gel air freshner and method of making the same
Wagering device display