Multiple position vacuum actuator

Claim 1

IN COMBINATION: A CUP SHAPED CASING MEMBER HAVING A FLAT BOTTOM WITH A CENTRALLY LOCATED CASING SHAFT OPENING IN SAID BOTTOM AND CONNECTED TO AN UPWARDLY DIRECTED AND OUTWARDLY FLARED SIDE WALL WITH A FLAT OUTWARDLY DIRECTED RIM WITH AN UPWARD FLANGE HAVING AN INWARDLY DIRECTED GROOVE; AN INVERTED CUP SHAPED CASING MEMBER HAVING AN INVERTED FLAT BOTTOM WITH A CENTRALLY LOCATED UPWARDLY DIRECTED CYLINDER AND CONNECTED TO A DOWNWARDLY DIRECTED AND OUTWARDLY FLARED SIDE WALL WITH A FLAT OUTWARDLY DIRECTED FLANGE WITH AN OUTWARDLY DIRECTED BEAD ENGAGING SAID INWARDLY DIRECTED GROOVE TO LOCK SAID CUP SHAPED CASING MEMBERS TOGETHER, SAID OUTWARDLY DIRECTED FLANGE HAVING A DOWNWARDLY DIRECTED GROOVE; A FLEXIBLE DIAPHRAGM HAVING AN OUTER RIM BEAD HELD IN AND BETWEEN SAID DOWNWARDLY DIRECTED GROOVE AND SAID OUTWARDLY DIRECTED RIM, AND HAVING A NORMALLY FLAT CENTRAL DIAPHRAGM PORTION WITH A CENTRAL PLUNGER RECEIVING OPENING THEREIN; A PLUNGER CONSTRUCTION INCLUDING A FLAT PLATE ENGAGING SAID FLAT CENTRAL DIAPHRAGM PORTION, A DOWNWARD SHAFT CONNECTED TO SAID PLATE ENGAGING AND SEALED TO SAID CENTRAL DIAPHRAGM OPENING AND PASSING THROUGH SAID CASING SHAFT OPENING, AND AN UPWARD PISTON SHAFT CONNECTED TO SAID FLAT PLATE AND HAVING A PISTON RECIPROCATING IN SAID CYLINDER AND HAVING A FLUID FLOW OPENING IN SAID PISTON, SAID CYLINDER HAVING TWO AXIALLY SPACED FLUID FLOW OPENINGS OPENED AND CLOSED BY SAID PISTON, AND SAID INVERTED FLAT BOTTOM HAVING A FLUID FLOW OPENING.