Firma Carl Freudenberg

Detlef Cordts

Bernhard Gesenhues

Michael Brummer

Klaus Dohring

Frank Wagner

A piston engine or machine with a belt drive which is surrounded by a housing, with the housing substantially sealing off the belt drive from the environment and from the piston engine or machine, is provided. The housing may have Helmholtz resonators facing the belt drive.

Piston engine or machine

An intake pipe assembly for an internal combustion engine is described. The intake pipe assembly includes an intake pipe and a safety valve which can be brought into an open position by the presence of a pressure on the inside of the intake pipe which exceeds a pressure of the surrounding atmosphere.

Intake pipe for an internal combustion engine

Device for the removal of liquid components issuing from a shaft seal into a cavity (3) enveloping a rotating shaft (1). A frictional heat source for the evaporation of the liquid components is associated with the cavity (3) and/or parts of the engine adjoining it.

Device for evaporating fluid leakage of liquid components in a shaft seal

A cooling water pump for a pump housing of an internal combustion engine includes a bearing cover that can be fixed within a bore of the pump housing. The pump also includes a pump shaft and a bearing. The pump shaft is rotatably mounted in the bearing. An impeller and a pulley are each coupled to the pump shaft, and the impeller has an inlet opening that is circular in shape and concentric with the impeller. The inlet opening is disposed at the end of the impeller that faces the pump housing in the axial direction. A first concentrically formed covering covers the impeller and is impermeable to liquids flowing in the axial direction. The first covering is disposed in first zones located radially beyond the inlet opening, and the impeller is open in second zones located on a side of the impeller axially opposite the first covering.

Cooling water pump for use on the pump housing of an internal combustion

The plastic impeller of a coolant pump is attached to the bearing shaft with a bearing journal, so that the journal engages to be seated firmly in an axial bore of the shaft. Here, the bearing journal and the impeller are formed in one piece of the same material. The bearing journal is pressed or glued into the bore of the bearing shaft, and the impeller as well as the bearing journal are formed of a phenolic resin which is resistant to the coolant.

Bearing journal for the plastic impeller of a coolant pump

An intake manifold for an internal combustion engine is disclosed. The intake manifold has an intake manifold body of fixed cross-section with a passage passing through it. The passage area can be altered by an expansible member arranged in the passage. The expansible member is an elastically expandable membrane, as well as a supply pipe used to expand the membrane, as needed, by use of a fluid medium.

Intake manifold having an elastically expandable membrane

A cooling water pump for combustion engines has, between a sealing element 6 and a bearing 5, an annular chamber 7 provided with at least two openings 8, 9 penetrating the cover 2 of the bearing on opposing sides of the shaft 4. At least one absorbent disc 10 is provided axially between the ventilating openings 8, 9 and the bearing 5.

Growing community of inventors

Morlenbach, Germany

Detlef Cordts