Multi-diaphragm fluid pressure motor construction

Claim 1

A FLUID PRESSURE MOTOR COMPRISING: A GENERALLY CUPSHAPED SHELL HAVING AN OUTWARDLY FACING INTERNAL SHOULDER AND AN OPENING OF UNIFORM CROSS SECTION OPENING OUTWARDLY FROM SAID SHOULDER, A FIRST DIAPHRAGM EXTENDING ACROSS SAID CHAMBER WITH ITS PERIPHERY POSITIONED AGAINST SAID SHOULDER, THE OUTER FACE OF SAID PERIPHERY OF SAID DIAPHRAGM HAVING A RADIALLY INWARDLY FACING ANNULAR SHOULDER WHICH OVERLIES SAID SHOULDER OF SAID SHELL, A FIRST ANNULAR MEMBER POSITIONED AGAINST THE OUTER FACE OF SAID PERIPHERY OF SAID DIAPHRAGM, SAID FIRST ANNULAR MEMBER HAVING A RADIALLY OUTWARDLY FACING ANNULAR SHOULDER ON ITS INNER FACE WHICH ABUTS SAID RADIALLY INWARDLY FACING SHOULDER OF SAID DIAPHRAGM, A SECOND GENERALLY ANNULAR SPACER MEMBER POSITIONED OUTWARDLY OF SAID FIRST ANNULAR MEMBER AND PROVIDING AN ANNULAR SPACE BETWEEN SAID SECOND ANNULAR MEMBER AND SAID SHELL; A SECOND DIAPHRAGM EXTENDING TRANSVERSELY OF SAID CHAMBER WITH ITS RADIALLY OUTER PORTION POSITIONED BETWEEN SAID FIRST AND SECOND ANNULAR MEMBERS; SAID FIRST ANNULAR MEMBER HAVING FLOW PASSAGES THERETHROUGH COMMUNICATING SAID ANNULAR SPACE WITH THE PORTION OF SAID CHAMBER BETWEEN SAID DIAPHRAGMS, A THIRD DIAPHRAGM EXTENDING TRANSVERSELY OF SAID CHAMBER WITH ITS RADIALLY OUTER PORTION IN ABUTMENT WITH SAID SECOND ANNULAR SPACER MEMBER AND THE INSIDE SURFACE OF SAID SHELL, SAID SECOND ANNULAR MEMBER HAVING FLOW PASSAGES THEREIN FOR COMMUNICATING SAID ANNULAR SPACE WITH THE REGION BEHIND SAID THIRD DIAPHRAGM, AN END COVER MEMBER FOR SAID SHELL, SAID COVER MEMBER HAVING AN ANNULAR OUTER PORTION IN ABUTMENT WITH SAID THIRD DIAPHRAGM, AND MEANS BIASING SAID COVER MEMBER TOWARD SAID SHOULDER OF SAID SHELL.