Two stage vacuum break assembly

Abstract From the Canadian patent

A fluid motor or vacuum break device for use with the carburetor of an internal combustion engine in which an. output plunger of the motor moves in two stages in succession with a period of delay therebetween in response to variable pressure in the form of vacuum from the intake manifold of an engine. Upon admission of vacuum pressure to a variable pressure chamber a diaphragm assembly moves in a first stage after which there is a period of delay and the diaphragm assembly and plunger moves in a second stage together with a movable wall.