Hung Q Truong

US Patent:

20110005385, Jan 13, 2011

Filed:

Jul 9, 2010

Appl. No.:

12/833771

Inventors:

Hung Truong - Panorama City CA, US
Angel Ching - Montebello CA, US
Tarig Latif - Downey CA, US

International Classification:

F15B 15/17

US Classification:

91417 R

Abstract:

An hydraulic actuator with a housing having two ports (A, C) that selectively receive pressured fluid to move a piston () to a forward position (F) or to a rearward position (R), wherein the piston can be moved to a third, or neutral position (N) by applying equally pressured fluid to both ports. A pusher () that lies in the same housing cavity as the piston, is pushed forward by pressured fluid applied to the second port (C), and the pusher pushes the piston forwardly. The pusher moves forward until the pusher abuts a housing surface (), at which point the piston lies in the third position (N).

US Patent:

20190017621, Jan 17, 2019

Filed:

Jul 13, 2017

Appl. No.:

15/648693

Inventors:

- Torrance CA, US
Joseph Michael Holohan - Camarillo CA, US
Hung Van Truong - Los Angeles CA, US
Bogumil J. Matysek - Lomita CA, US

International Classification:

F16K 31/06
F16K 31/05

Abstract:

An irrigation valve incorporates a valve body with an inlet, an outlet, a pressure chamber and a standpipe in fluid communication with the inlet. A solenoid operated valve train has a flow control inlet fitting, a solenoid actuating element movable between in inactivated position and an activated position responsive to a solenoid coil, and a threaded manual actuator rotatably movable between a first sealing position and a second open position. The valve train is operable in a first position with the solenoid actuating element in the inactivated position to produce hydraulic interconnection between the standpipe and the pressure chamber, a second position with the solenoid actuating element in the activated position producing hydraulic interconnection between the pressure chamber and an outlet port, and a third position with the threaded manual actuator in the second open position producing hydraulic interconnection between the pressure camber and the outlet port.