Pneumatic actuator and parts therefor or the like

Claim 1

IN COMBINATION, A HOUSING MEANS, A FLEXIBLE DIAPHRAGM CARRIED BY SAID HOUSING MEANS TO DEFINE A CHAMBER THEREWITH, SAID DIAPHRAGM HAVING A THICK CENTRAL PORTION PROVIDED WITH AN APERTURE PASSING THERETHROUGH, SAID APERTURE DEFINING AN OUTWARDLY FACING BEVELED SURFACE ADJACENT THE OUTSIDE OF SAID THICK CENTRAL PORTION AND A CYLINDRICAL SURFACE ADJACENT THE INSIDE THEREOF, AND A FLAT PLATE DISPOSED IN SAID CHAMBER AND HAVING AN INTEGRAL ACTUATING POST PASSING THROUGH SAID APERTURE WHEREBY ONE SIDE OF SAID PLATE IS ADAPTED TO BE DISPOSED AGAINST THE INSIDE SURFACE OF SAID DIAPHRAGM, SAID POST HAVING AN ANNULAR RECESS THEREIN ADJACENT SAID PLATE AND SNAPFITTINGLY RECEIVING SAID THICK CENTRAL PORTION OF SAID DIAPHRAGM, SAID ANNULAR RECESS DEFINING A BEVELED SURFACE ON SAID POST MATING WITH SAID BEVELED SURFACE OF SAID DIAPHRAGM AND FACING TOWARD SAID PLATE AND DEFINING A CYLINDRICAL PORTION INTERMEDIATE SAID PLATE AND SAID BEVELED SURFACE TO FACE SAID CYLINDRICAL SURFACE OF SAID DIAPHRAGM WHEREBY SAID DIAPHRAGM IS PULLED AGAINST SAID PLATE TO PROVIDE A FLUID SEAL AROUND SAID APERTURE WHEN A VACUUM SOURCE IS INTERCONNECTED TO SAID CHAMBER.