Gear pump having internal bearings and seals

Claim 1

A GEAR PUMP COMPRISING A HOUSING DEFINING A CHAMBER, SAID HOUSING INCLUDING FRONT AND BACK PLATES, IDLER SHAFTS HAVING LONGITUDINAL BORES FORMED THERETHROUGH MOUNTED ON THE FRONT PLATE AND PROJECTING THEREFROM INTO THE CHAMBER, A DRIVE SHAFT JOURNALED IN THE BACK PLATE, A CUP-SHAPED DRIVE GEAR INTEGRAL WITH THE DRIVE SHAFT AND ROTATABLE ON ONE OF THE IDLER SHAFTS, A CUP-SHAPED DRIVEN GEAR ON ANOTHER OF THE IDLER SHAFTS AND MESHED WITH SAID DRIVE GEAR, BEARINGS IN SAID GEARS AND OPERABLE ON THE INNER END PORTIONS OF THE IDLER SHAFTS, SEALS IN THE GEARS BETWEEN THE CHAMBER AND THE BEARINGS, RETAINING NUTS THREADED ON THE OUTER END PORTIONS OF THE IDLER SHAFTS SAID IDLER SHAFTS COMPRISING ENLARGED INTERMEDIATE PORTIONS ENCIRCLED BY THE SEALS AND PROVIDING SPACED SHOULDERS ABUTTING THE FRONT PLATE AND THE BEARINGS, EXTRACTOR DISKS DISPOSED IN SAID GEARS INWARDLY OF THE CORRESPONDING BEARINGS AND INCLUDING MEANS ALIGNED WITH THE CORRESPONDING LONGITUDINAL BORES AND ADAPTED TO HAVE AN ELONGATED EXTRACTION TOOL PASSED THROUGH SAID BORE AND REMOVABLY ENGAGED THEREWITH FOR PULLING SAID BEARING AND SEALS FROM WITHIN SAID GEARS.