Master cylinder cap

Claim 1

THE COMBINATION OF A MASTER CYLINDER RESERVOIR AND CAP COMPRISING: A CAP AND A HOLLOW RESERVOIR MEMBER, SAID CAP COMPRISING AN ANNULAR WALL CLOSED AT THE TOP END BY A PORTION TRANSVERSE THERETO THEREBY DEFINING A CAVITY, FLANGE MEANS INTERMEDIATE THE ENDS OF SAID ANNULAR WALL, THE OUTER SURFACE OF SAID WALL HAVING AN ANNULAR RELIEVED PORTION EXTENDING BETWEEN SAID FLANGE MEANS AND THE OPEN END OF SAID WALL, A FLEXIBLE SEALING MEMBER BRIDGING THE ENTIRE CAVITY AND HAVING ITS OUTER PERIPHERAL PORTION RECEIVED IN SAID RELIEVED PORTION, VENT MEANS IN SAID CAP FOR VENTING SAID CAVITY, SAID RESERVOIR MEMBER HAVING AN UPPER OPEN END ANNULAR WALL PORTION RECEIVING THE LOWER END OF SAID ANNULAR WALL OF SAID RESERVOIR RECEIVING THE LOWER END PORTION OF SAID SEALING MEMBER COMPRESSIVELY ENGAGING THE INNER SURFACE OF SAID RESERVOIR WALL, THE BOTTOM SURFACE OF SAID FLANGE MEANS ENGAGING THE END OF SAID RESERVOIR WALL AT THE OPEN END THEREOF, AT LEAST ONE LUG EXTENDING UPWARDS FROM THE OPEN END OF SAID RESERVOIR WALL, SAID LUG INCLUDING A FINGER EXTENDING RADIALLY OUTWARDS THEREFROM, AT LEAST ONE OPENING IN SAID FLANGE MEANS, SAID FINGER EXTENDING THROUGH SAID OPENING IN SAID FLANGE MEANS, SAID OPENING HAVING AN INITIAL FINGER RECEIVING SECTION OF RADIAL WIDTH AT LEAST EQUAL TO THE RADIAL LENGTH OF SAID FINGER AND A FINGER RETAINING SECTION OF RADIAL WIDTH SMALLER THAN THE RADIAL LENGTH OF SAID FINGER, SAID FINGER AND SECTIONS BEING SO LOCATED THAT UPON ROTATION OF SAID CAP IN ONE DIRECTION SAID FINGER WILL BE LOCATED WITHIN SAID FINGER RETAINER SECTION OF SAID OPENING, WHEREBY SAID CAP IS REMOVABLY SECURED TO SAID RESERVOIR MEMBER.