Patent ID: 7614855

Claim:
A pump assembly, comprising: a motor having a housing and a rotating output shaft, the motor housing including a rod or bolt extending out in a parallel or substantially parallel relation to the output shaft, the rod or bolt including a transverse hole extending therethrough for receiving an optional safety mechanism; a pump having a housing and a rotating input shaft, the rotating input shaft configured to transmit a rotational force to a pumping mechanism of the pump; the input shaft of the pump being coupled to the output shaft of the motor, the coupling between the input shaft of the pump and the output shaft of the motor preventing the pump and the motor from moving away from each other during operation; and a rotational stop mechanism including a bracket for fixing the pump housing relative to the motor housing, the bracket configured to prevent the pump housing from freely rotating with the output shaft of the motor during operation, the rotational stop mechanism including at least one resilient member situated between the bracket and motor housing that engages the bracket for absorbing or substantially absorbing at least some relative movement between the pump and the motor as the output shaft is rotated by the motor, wherein the bracket includes a hole that slidingly engages the rod or bolt of the motor housing even during operation of the pump, wherein the resilient member is positioned in the hole between the bracket and the rod or bolt, wherein the at least some relative movement between the pump and the motor results from a misalignment of the input shaft of the pump and the output shaft of the motor at the coupling between the input shaft of the pump and the output shaft of the motor.