[12] Patent
[11] Patent No.:GC0009370  
[45] Date of Publishing the Grant of the Patent: 31/Dec /2018                56/2018  
Number of the Decision to Grant the Patent:2018/141603
Date of the Decision to Grant the Patent:13/Dec/2018

[21] Application No.:GC 2013-24626

[22] Filing Date:10/6/2013

[30] Priority:

[33] State [32] Priority date [31] Priority No.

[72] Inventors:1- MUCI, Moses Alejandro،2- BESSMAN, John Carl

[73] Owner: FISHER CONTROLS INTERNATIONAL LLC, 205 South Center St., Iowa 20158, Marshalltown, USA

[74] Agent: Suleiman I. Al-Ammar Law Office




Int. Cl.: F15B 3/00; F16K 31/122 (2006.01)

[56] Cited Documents:

-US 2005098748 A1 (SUZUKI ISAO [JP]) 12 May 2005
-EP 0477400 A1 (SIEMENS AG [DE]) 1 April 1992
-US 5758862 A (STURMAN ODED E [US]) 2 June 1998
Examiner: Eng. Fahad M. AlBaker

[57] Abstract: A valve assembly includes a first piston member displaceably disposed within a first chamber. A second piston member is coupled to a valve closure element, such as a diaphragm, and the second piston member is disposed within a second chamber. A longitudinal displacement of the first piston member relative to the first chamber causes hydraulic fluid disposed within the first chamber to longitudinally displace the second piston member such that the valve closure element engages a valve seat to close the valve assembly. The area of the second piston member is greater than that of the first piston member to multiply the force provided by an actuator that displaces a valve stem coupled to the first piston member
No. of claims: 20     No. of figures: 2


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