Pneumatic control means for a vehicle heat exchanger system or the like

摘要

A thermostat construction having a valve unit for directing a pneumatic signal to a pneumatically operated control device in relation to the force differential between the temperature sensed by the temperature sensing unit thereof and the temperature setting of a temperature setting unit thereof, a lever being pivotally mounted to the construction and being operatively interconnected to the valve unit at a first portion of the lever and to the temperature setting unit and the temperature sensing unit at a second portion of the lever. A pneumatically operated positioning construction having a valve unit for directing a pneumatic signal to a positioning chamber thereof in relation to the force differential between a pneumatically operated setting unit thereof and a feedback unit of the positioning chamber, a lever being pivotally mounted to the construction and being operatively interconnected to the valve unit at a first portion of the lever and to the setting unit and the feedback unit at a second portion of the lever.