Fluid pump assembly

Claim 1

IN A FLUID PUMP ASSEMBLY HAVING A HOLLOW HOUSING PROVIDED WITH AN APERTURE, A POWER DRIVEN IMPELLER SHAFT EXTENDING INTO THE HOUSING AND A MECHANICAL FLUID SEAL UNIT AROUND THE SHAFT EXTERNALLY OF THE HOUSING AND INCLUDING A PAIR OF ANNULAR SEAL PARTS SURROUNDING THE SHAFT AND ROTATABLE THEREWITH, AND NORMALLY STATIONARY SEAL RING MEANS SURROUNDING THE SHAFT AND IN ENGAGEMENT WITH OPPOSED OUTER SURFACES OF RESPECTIVE SEAL PARTS, THE COMBINATION WITH SAID ASSEMBLY OF: A SECTIONAL, HOLLOW SEAL UNIT CARTRIDGE INCLUDING A PAIR OF PERMANENT, SUBSTANTIALLY IDENTICAL, CUP-SHAPED SECTIONS EACH HAVING A CIRCULAR END WALL PROVIDED WITH AN OPENING CLEARING A PROXIMAL PORTION OF THE SHAFT, CENTRAL, CYLINDRICAL WALL PORTIONS COAXIAL WITH THE SHAFT AND SPACED THEREFROM, AND AN OUTWARDLY EXTENDING, PERIPHERAL FLANGE INTEGRAL WITH A RESPECTIVE CYLINDRICAL WALL PORTION AND REMOTE FROM CORRESPONDING END WALLS, SAID FLANGES ON SAID SECTIONS HAVING ALIGNED OPENINGS THEREIN, THE OPENINGS IN THE FLANGES OF ONE OF SAID SECTIONS BEING INTERNALLY THREADED; FIRST AND SECOND BOLTS HAVING THE SAME DIAMETER BUT WITH THE SECOND BOLTS BEING SHORTER THAN SAID FIRST BOLTS, SAID FIRST AND SECOND BOLTS EXTENDING THROUGH THE OPENINGS IN THE FLANGE OF THE OTHER SECTION AND BEING THREADED INTO THE OPENINGS OF SAID ONE SECTION FOR RELEASABLY INTERCONNECTING SAID SECTIONS WITH THE FLANGES IN ABUTTING COAXIAL RELATIONSHIP AND WITH SAID OPENINGS OF SAID END WALLS IN ALIGNMENT, THE OUTER ENDS OF THE THREADED PORTION OF SAID FIRST BOLTS EXTENDING OUTWARDLY FROM THE OTHER SECTION AND ENGAGING THE HOUSING, SAID FIRST BOLTS BEING OF SUFFICIENT LENGTH TO FORCE SAID ONE SECTION OUT OF THE APERTURE AND THEREBY TO MOVE THE CARTRIDGE AWAY FROM THE HOUSING AS THE HEAD ENDS OF THE FIRST BOLTS ARE MOVED TOWARD THE FLANGE OF THE OTHER SECTION; STRUCTURE REMOVABLY MOUNTING THE CARTRIDGE ON THE HOUSING IN A POSITION SURROUNDING THE SHAFT, COMPLETELY ENCLOSING THE SEAL UNIT WITH ONE OF THE SECTIONS TELESCOPED WITHIN THE APERTURE IN CLOSING RELATIONSHIP THERETO AND THE SHAFT EXTENDING THROUGH SAID OPENINGS IN THE SECTIONS, SAID CARTRIDGE RECEIVING SAID SEAL UNIT IN A POSITION WITH THE SEAL RING MEANS ENGAGING CORRESPONDING SECTIONS TO PRECLUDE ROTATION OF SAID SEAL RING MEANS AS THE SEAL PARTS ARE ROTATED WITH SAID SHAFT, THE CYLINDRICAL SIDE WALL PORTION OF SAID ONE SECTION HAVING AN OUTER, CIRCUMFERENTIALLY EXTENDING, TAPERED SURFACE OF A WIDTH TO FACILIATE INSERTION OF SAID ONE SECTION INTO SAID APERTURE; AND A LIQUID SUPPLY CONDUIT CONNECTED TO THE OTHER SECTION OF THE CARTRIDGE.