Pneumatic cushioning seat support with variable cushioning and snubbing diaphragm action

Claim 1

A PNEUMATIC CUSHIONING SUPPORT COMPRISING: A HOUSING HAVING A BASE, A SKIRT RISING FROM SAID BASE AND A TOP DEFINING A CENTRAL OPENING; A GUIDE COLLAR ON SAID TOP AROUND SAID OPENING; A SEAT SUPPORT COLUMN SLIDABLE VERTICALLY IN SAID COLLAR AND GUIDED THEREBY; AND A DOME-SHAPED DIAPHRAGM HAVING A LOWER END SEALED TO SAID BASE, A GENERALLY CYLINDRICAL SKIRT RISING THEREFROM WITHIN SAID HOUSING, AND A TOP ADJACENT THE TOP OF SAID HOUSING AND HAVING A CENTRAL PORTION SUPPORTING SAID COLUMN; A PNEUMATIC CUSHIONING CHAMBER BEING DEFINED WITHIN SAID DIAPHRAGM BETWEEN ITS TOP AND SAID BASE; SAID SKIRTS HAVING RADIALLY OPPOSED PORTIONS THEREOF AT THEIR UPPER AND LOWER EXTREMITIES SUBSTANTIALLY IN CONTACT WITH ONE ANOTHER AND SAID HOUSING SKIRT HAVING AN ANNULAR PORTION THEREOF INTERMEDIATE ITS SAID UPPER AND LOWER END PORTIONS BULGED RADIALLY AWAY FROM THE OPPOSED INTERMEDIATE PORTION OF THE DIAPHRAGM SKIRT IN THE NORMALLY LOADED CONDITION OF THE DIAPHRAGM AND DEFINING THEREWITH AN ANNULAR EXPANSION SPACE INTO WHICH THE DIAPHRAGM SKIRT IS DISTENDED DURING RELATIVE DOWNWARD MOVEMENT OF THE DIAPHRAGM TOP INTO SAID CUSHIONING CHAMBER, THE PARTS BEING SO PROPORTIONED THAT THE DIAPHRAGM SKIRT WILL BE DISTENDED INTO FULL CONTACT WITH THE HOUSING SKIRT BELOW THE DIAPHRAGM TOP AND THERE WILL BE A RSULTANT RAPID INCREASE IN AIR-CUSHION RESISTANCE TO SAID DOWNWARD MOVEMENT, AT A LEVEL OF SAID DOWNWARD MOVEMET SUFFICIENTLY ABOVE SAID BASE TO PROVIDE A PNEUMATIC BOTTOMING ACTON ABSORBING HEAVY ROAD SHOCKS.