Servomotor

Claim 1

A SERVOMOTOR COMPRISING: A HOUSING INCLUDING A FRONT SHELL AND A REAR SHELL; A MEANS TO JOIN SAID FRONT AND REAR SHELL; A ROLLING DIAPHRAGM HAVING A PERIPHERAL BEAD BETWEEN SAID SHELLS TO SEAL THE JUNCTURE OF SAME, SAID ROLLING DIAPHRAGM EXTENDING INWARDLY OF SAID SHELLS AND BEING PROVIDED WTH AN AXIALLY THICKENED INNER PORTION; A FORCE TRANSMITTING MEANS CENTRALLY OF SAID HOUSING AND RECIPROCATORILY MOUNTED THROUGH SAID FRONT SHELL TO PROJECT INWARDLY OF SAID HOUSING, SAID FORCE TRANSMITTING MEANS INCLUDING AN ADJUSTABLE EXTENSION ON ONE END AND A DRILLED OPENING IN THE OTHER END WITH A BEARING SEAL OPERATIVELY CONNECTING THE HOUSING AND THE FORCE TRANSMITTING MEANS; A MEANS INCLUDING A FIRST ANNULAR PLATE AND FRONT AND REAR SNAP RINGS TO SEALINGLY JOIN SAID FORCE TRANSMITTING MEANS TO SAID ROLLING DIAPHRAGM ADJACENT SAID DRILLED OPENING; A ROD HAVING AN AXIAL BORE IN ONE END THEREOF RECIPROCATORILY MOUNTED IN THE DRILLED OPENING OF SAID FORCE TRANSMITTING MEANS, WHICH ROD EXTENDS INWARDLY OR REARWARDLY OF SAID ROLLING DIAPHRAGM TOWARDS AN INNER SURFACE OF SAID REAR SHELL; A SECOND ANNULAR PLATE OPERATIVELY CONNECTED TO SAID ROD ADJACENT ITS INNERMOST END; A HOLLOW, FLEXIBLE MOVABLE WALL IN SAID HOUSING BEHIND SAID ROLLING DIAPHRAGM IN SAID REAR SHELL, SAID HOLLOW, FLEXIBLE MOVABLE WALL BEING AFFIXED TO SAID HOUSING, SAID HOLLOW MOVABLE WALL HAVING A CONDUIT LEADING TO A REFERENCE PRESSURE SOURCE TO EXPAND SAID HOLLOW MOVABLE WALL WITH A FIRST PRESSURE MEDIUM; A MEANS TO OPERATIELY CONNECT SAID SECOND ANNULAR PLATE AND SAID HOLLOW, FLEXIBLE MOVABLE WALL, WHICH MEANS INCLUDES A VALVE HOUSING, A VALVE MECHANISM AND A REACTION MECHANISM, SAID VALVE HOUSING BEING PROVIDED WITH APPROPRIATE PASSAGE ARRANGED TO BE CONTROLLED BY SAID VALVE MECHANISM TO CONTROL TRANSTION BETWEEN A SUSPENSION PRESSURE SOURCE OF A SECOND PRESSURE MEDIUM AND SAID FIRST PRESSURE SOURCE TO CREATE A PRESSURE DIFFERENTIAL ACROSS SAID ROLLING DIAPHRAGM SUCH THAT THE ROLLING DIAPHRAGM IS MOVED FORWARDLY; A PUSH ROD RECIPROCATORILY MOUNTED THROUGH SAID REAR SHELL FORWARDLY TO OPERATE SAID VALVE MECHANISM, SAID PUSH ROD ARRANGED TO BE MOVABLE RELATIVE TO SAID VALVE HOUSING AND OPERATIVELY CONNECTED TO SAID REACTION MEANS; AND MEANS TO SIZE THE EFFECTIVE AREA OF SAID HOLLOW, FLEXIBLE MOVABLE WALL IN ACCORDANCE WITH THE FORCE PRODUCED BY SAID REACTION MEANS TO LIMIT TRAVEL OF SAID PUSH ROD TO THAT REQUIRED TO OPERATE SAID VALVE MECHANISM UNTIL SUCH TIME AS SAID FIRST PRESSURE MEDIUM IS SUSPENSING SAID HOLLOW, FLEXIBLE MOVABLE WALL WHEREUPON SAID PUSH ROD MAY MANUALLY FOLLOW-THROUGH TO OPERATE SAID FORCE TRANSMITTING MEANS.