초록 ▼

A control valve includes a single diaphragm as a common wall between an input signal chamber having an input port and an output chamber having a central supply port and an exhaust orifice. The orifice has a seating face parallel to and spaced from the diaphragm. A spring-loaded ball valve unit in th

A control valve includes a single diaphragm as a common wall between an input signal chamber having an input port and an output chamber having a central supply port and an exhaust orifice. The orifice has a seating face parallel to and spaced from the diaphragm. A spring-loaded ball valve unit in the supply passage is aligned with an operator moving with the diaphragm. An increasing input signal first moves the diaphragm to close the exhaust orifice and thereafter moves the operator to open the supply valve. Pressure builds in the output chamber, tending to return the diaphragm and close the supply valve until the output and pilot pressure are balanced. The supply valve then closes. As the exhaust is sealed off, this effectively seals the output chamber. If the signal decreases, the diaphragm uncovers the exhaust orifice until a new balanced state is created. In high flow capacity systems a multiplicity of exhaust orifices are employed to match exhaust and supply flow capacity while maintaining minimal leakage.

대표청구항 ▼

A fluid relay device, comprising a body assembly, a control flexible diaphragm of a flexible material permitting relative movement between various portions thereof with flexing of the diaphragm therebetween, said diaphragm being secured within the body assembly and defining an input signal chamber t

A fluid relay device, comprising a body assembly, a control flexible diaphragm of a flexible material permitting relative movement between various portions thereof with flexing of the diaphragm therebetween, said diaphragm being secured within the body assembly and defining an input signal chamber to one side of the diaphragm and a combined exhaust and output chamber to the opposite side of the diaphragm, said diaphragm moving to a position to balance the pressure in said chambers, a valved supply means connected to said output chamber and having an essentially rigid control means coupled to a first portion of diaphragm and moving with the diaphragm for opening and closing of said supply means in response to movement of said diaphragm, and an exhaust port means connected to said output chamber in spaced relation to the supply means including said rigid control means and having a seal means located in opposed relation to a closure portion of the diaphragm and opened and closed by the movement of said diaphragm, and said rigid control means and said first portion being spaced from said closure portion and connected to said closure portion solely by a non-rigid connection provided only by said diaphragm whereby said first portion and control means includes movement relative to the said closure portion including with the closure portion stationary.