Patent ID: 8585372
Filing Date: 2013-11-19
Classification: B60T,F04B

Abstract:
1. A motor and pump assembly comprising: a pump and an electric motor driving the pump, the pump being provided as a double-diaphragm pump with two mutually opposite working diaphragms which are, in each case, tension-mounted between a pump casing and a working-space cover and thereby delimit a working space and which can be moved by a crank drive having eccentrics and connecting rods, said working space being assigned, in each case, an inlet duct with an inlet valve and an outlet duct with an outlet valve, wherein the outlet ducts are arranged in the working-space covers and in the pump casing in such a way that air displaced out of the working spaces is conducted into an inner space that surrounds the crank drive of the pump casing along an airflow path, and an air outlet unit, comprising a filter housing, a filter, an air outlet cover, an air outlet closing cap, a valve body and an intermediate bottom, is provided that is configured to allow a low-noise blow-out of air from the inner space as a result of a deflection of the air, wherein the intermediate bottom comprises a passageway there-through, and wherein the airflow path exits at the air outlet unit, the airflow path entering the air outlet unit at a through-bore through the air outlet closing cap at a first side of the air outlet unit and passing through the passageway in the intermediate bottom at a second side of the air outlet unit, the first side opposing the second side, and after the passageway, the airflow path being redirected back toward an orifice at the first side of the air outlet unit.