F - Mech Eng,Light,Heat,Weapons – 16 – K
Patent
F - Mech Eng,Light,Heat,Weapons
16
K
137/126
F16K 11/00 (2006.01) E21D 23/16 (2006.01) E21D 23/26 (2006.01)
Patent
CA 1212012
-28- ABSTRACT "CONTROL VALVE" A control valve (1), particularly for effecting control of a hydraulic circuit comprising:- at least one valve arrangement (13, 14, 23, 26) located in a first valve body (10) which is provided with a hydraulic fluid supply port (16), a hydraulic fluid exhaust port (30), and a hydraulic fluid delivery port (25), the valve arrangement (13) normally being biassed to a position in which fluid flow connection is made between the delivery port (25) and the exhaust port (30), and the supply port (16) is closed; and the valve arrangement (13, 26) being manually displaceable, to cause firstly closure of the connection between the delivery port (25) and the exhaust port (30) and secondly, upon further displacement, opening of a fluid flow connection between the delivery port (25) and the supply port (16); and a valve arrangement located in a second valve body (11) which is provided with an inlet port (16A) connectable to a source of hydraulic fluid, a hydraulic fluid exhaust port (30A), and a hydraulic fluid delivery -24- port (25A) to deliver fluid to the supply port (16) of the or each first valve body (10), the valve arrangement normally being biassed to a position in which fluid flow connection is made between the delivery port (25A) and the exhaust port (30A), and the inlet port (16A) is closed, and manually displaceable to cause firstly closure of the connection between the delivery port (16A) and the exhaust port (25A), and secondly, upon further displacement, opening a fluid flow connection between the inlet port (16A) and the delivery port (25A), to make fluid available to the supply port (16) of the or each first valve body (10), whereby a hydraulic pressure is only transmitted from the control valve (1) when there is activated not only the first valve body, or a selected one or more of the first valve bodies but also the second valve body.
450948
Fletcher Sutcliffe Wild Limited
Robic Robic & Associes/associates
LandOfFree
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