Patent ID: 7578310

Claim:
A pressure controller device for instantaneous operation with a finger of a user including a housing, a precision pressure regulator located in said housing, an inlet and an outlet for a working fluid in the housing, a valve located intermediate said inlet and outlet, a first diaphragm operable upon said valve and actuable by the working fluid, a pressure adjustment mechanism located in the housing and including a second diaphragm and a flapper-nozzle arrangement actuable by said second diaphragm, said device comprising a shuttle resiliently loaded at each end thereof and actuable to operate said second diaphragm, a handle located externally of the housing and carried on at least one lever arm external to the housing, the arm supporting at a distal end remote therefrom a shaft rotatably mounted on the housing and providing a pivot axis for the handle, a central portion of the shaft connecting to the shuttle intermediate both ends thereof the handle being operable between predetermined limits to shift said shuttle and to move the second diaphragm and thus the flapper-nozzle arrangement thereby through the agency of the first diaphragm to adjust the pressure of the working fluid flowing through the valve between the inlet and the outlet, the operation of the handle in use overriding the precision pressure regulator to vary the pressure of the working fluid passing through the outlet.