US 10,087,930 B2Granted

Vane for a vane cell pump and vane cell pump

AssigneeJoma-Polytec GmbH

InventorsHans-Peter Ott, Bernd Hess, Stefanie Wuhrer, Martin Thoma, Torsten Helle, Friedhelm Pfitzer

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Abstract

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.

Claims14

Dependent claims

A vane for a vane cell pump wherein the vane rotates about an axis of rotation during operation by a rotor in a pump chamber and is guided in a direction orthogonal to a face of the vane in the rotor,

with an upper side and a lower side to abut against a bottom and a ceiling of the pump chamber,
with a front side and a rear side opposite the front side to limit pressure chambers formed in the pump chamber,
wherein the face of the vane slidably abuts against an inside wall of the pump chamber on a casing side,
wherein the vane comprises a base body made of a first plastic material and a vane end that is molded to the base body, forms the face, and consists of a second plastic material, and
wherein the base body comprises a mounting section around which the vane end is formed,
wherein the mounting section comprises at least one recess that runs in a direction transverse to the front side or the rear side,
and wherein the at least one recess comprises undercuts when viewed in the direction orthogonal to the face of the vane.

4 more elements

Dependencies are inferred from the claim text.

Facts

Application: 15/206,977Filed 11 Jul 2016
Priority: DE 10 2015 213 09813 Jul 2015
Published: US 2017/0016443 A119 Jan 2017
Granted: 2 Oct 2018
Term ends: Not estimatedThe source records don’t support an estimate.

Classification8 codes

F04C 2/348
With vanes reciprocating with respect to the inner member: the vanes positively engaging, with circumferential play, an outer rotatable member
F01C 21/0881
Construction of vanes or vane holders: the vanes consisting of two or more parts
F04C 18/3446
With vanes reciprocating with respect to the inner member: the inner and outer member being in contact along more than one line or surface
F04C 18/348
With vanes reciprocating with respect to the inner member: the vanes positively engaging, with circumferential play, an outer rotatable member