Joma-polytec Gmbh

Hans-Peter Ott

Torsten Helle

Bernd Hess

Martin Thoma

Willi Schneider

Friedhelm Pfitzer

Andreas Blank

Thomas Gulde

Stefanie Wuhrer

Benjamin Kawa

Mathias Schlotterer

Freidhelm Pfitzer

Helle Torsten

In order to enable efficient operation and reliable heat dissipation in a transmission, a pumping device () for lowering the internal pressure in a transmission () is equipped with a suction line (), which leads from a suction point () on a connection side () to a discharge point () on a discharge side (), a pump () for generating negative pressure at the suction point (), a pump drive () for driving the pump (), and an oil separator () connected upstream or downstream of the pump () in the suction line () that separates oil contained in the suction flow and returns it via a return line () to the connection side (), and a check valve () connected downstream, preferably directly downstream, of the pump (). A transmission () with such a pumping device (), a use of a pumping device () and a method for reducing power losses in a transmission () are disclosed.

Pumping device for a transmission and transmission comprising such a pumping device

A vacuum pump having a housing which limits a working space and having a rotor, rotatably mounted in the housing about a rotor axis, the rotor guides a vane being movably mounted in the radial direction, the vane has a transverse extent, and the vane divides the working space into a suction side having a suction inlet and a pressure side having a pressure outlet, the housing has at least one oil outlet, the oil outlet is closed by a relief valve, the relief valve assumes an open position, when a limit pressure lying above a nominal pressure is exceeded in the working space, and the transverse extent of the vane is large enough that when the vane passes the oil outlet, the oil outlet is closed by the vane, so that there is no fluid connection between the suction side and the pressure side over the oil outlet.

Vacuum pump with separate oil outlet with relief valve

A rotor for a vane cell pump&#x2014;in particular, for a vacuum pump&#x2014;with a base body that is made of plastic and can be driven by rotation, and that rotates about an axis of rotation during operation, wherein the base body comprises a guiding section for slidably receiving a pump vane and wherein the base body is flanked in the direction of the axis of rotation by a first bearing surface and a second bearing surface, wherein the second bearing surface comprises bearing sections that are at a distance from one another and that lie on a circular path that is arranged concentrically to the axis of rotation.

Plastic Rotor for a vacuum pump

A vane for a vane cell vacuum pump. The vane can be rotated about an axis of rotation by a rotor in a pump chamber and guided in the longitudinal direction in the rotor, with an upper side and a lower side to abut against the bottom and the ceiling of the pump chamber, with a rear side opposite a front side to limit the pressure chambers, with at least one face to slidably abut against an inside wall of the pump chamber on the casing side. The vane comprises a base body of a first plastic material and a vane end molded of a second plastic material to the base body forming the face. The base body comprises a mounting section around which the vane end is formed. The mounting section comprises at least one recess transverse to the front side and/or the rear side.

Vane for a vane cell pump and vane cell pump

The invention relates to a positive displacement pump, including a pot-shaped housing, a rotor rotatably supported in the housing, and at least one blade movably guided in the rotor, the blade tip of which contacts the inner circumferential wall of the housing and divides the interior into chambers, wherein a locking mechanism that inhibits or brakes the movement of the blade in the rotor is provided.

Positive displacement pump having axial movement coupling and rotational decoupling

The invention relates to a vacuum pump, in particular a vane pump, having a pump housing in which an intake chamber is provided, and a pump housing opening which feeds into the intake chamber, wherein an intake check valve is arranged in the pump housing opening and communicates with the atmosphere or feeds into an external vacuum chamber, with the intake check valve being accommodated in a pot-shaped valve housing, and with the pot-shaped valve housing having a housing bottom and a housing jacket, wherein the housing bottom is connectable to the housing jacket and the housing bottom can be snapped onto the housing jacket.

Growing community of inventors

Hirrlingen, Germany

Hans-Peter Ott