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A pump includes a pump chamber in which a rotor with gates is supported so that it can rotate, an electric motor for driving the rotor, a muffler that encloses a volume in the area of the pump chamber, wherein the volume is in active connection with an outlet port and a front muffler that is arrange

A pump includes a pump chamber in which a rotor with gates is supported so that it can rotate, an electric motor for driving the rotor, a muffler that encloses a volume in the area of the pump chamber, wherein the volume is in active connection with an outlet port and a front muffler that is arranged within the muffler. To improve the service life and reliability of the pump in a vehicle with minimal installation expense, it is proposed that a filter is integrated into the front muffler.

대표청구항 ▼

1. A pump, comprising: a pump chamber,a rotor with gates supported in said pump chamber so that said rotor can rotate,an electric motor operable for driving the rotor,a muffler that encloses a volume in the area of the pump chamber, wherein the volume is in active connection with an outlet port,a fr

1. A pump, comprising: a pump chamber,a rotor with gates supported in said pump chamber so that said rotor can rotate,an electric motor operable for driving the rotor,a muffler that encloses a volume in the area of the pump chamber, wherein the volume is in active connection with an outlet port,a front muffler that is arranged within the muffler,a filter integrated into the front muffler,wherein the front muffler is formed in a ring with a conical frustum-shaped lateral surface molded on the inside, andwherein the filter is fastened in an annular groove formed on an end of the lateral surface with a smaller diameter. 2. The pump according to claim 1, wherein the front muffler is made from an elastic material. 3. The pump according to claim 1, wherein the front muffler is held in a clamping manner on an annular web of the muffler. 4. A pump, comprising: a pump chamber,a rotor with gates supported in said pump chamber so that said rotor can rotate,an electric motor operable for driving the rotor,a muffler that encloses a volume in the area of the pump chamber, wherein the volume is in active connection with an outlet port,a front muffler that is arranged within the muffler,a filter integrated into the front muffler, andwherein the front muffler is held in a clamping manner on an annular web of the muffler. 5. The pump according to claim 4, wherein the front muffler is formed in a ring with a conical frustum-shaped lateral surface molded on the inside. 6. The pump according to claim 4, wherein the front muffler is made from an elastic material. 7. The pump according to claim 5, wherein the filter is fastened in an annular groove formed on an end of the lateral surface with a smaller diameter.