Patent ID: 9404513
Filing Date: 2016-08-02
CPC Classification: F15B

Claim Text:
1. A servo valve comprising: a valve housing; a piston cylinder disposed in the housing; a piston disposed within the piston cylinder, the piston cylinder being fluidly connected on a first end to a first fluid pressure pathway and fluidly connected on a second end to a second fluid pressure pathway, the piston configured to translate axially within the piston cylinder in response to a pressure differential between a first fluid in the first fluid pressure pathway and a second fluid in the second fluid pressure pathway; a flapper assembly including an activation portion and closure portion, said closure portion of the flapper assembly extending from the activation portion, said flapper assembly configured to move said closure portion to engage a first nozzle on the first fluid pressure pathway when the closure portion is in a first position and configured to move said closure portion to engage a second nozzle on the second fluid pressure pathway when the closure portion is in a second position; and a fluid flow control element disposed in the piston cylinder in a portion of the first fluid pressure pathway and comprising a surface that is sealable with a surface of the piston, the piston configured to seal the first fluid pressure pathway and stop a flow of fluid through the first fluid pressure pathway when the piston engages the fluid flow control element.