US 2019/0093656 A1 · AUTOMOTIVE VACUUM PUMP

Abstract

A vacuum pump for pumping a gas includes a pump housing which defines a pump cavity, a shiftable vane, a pump rotor body, a separate axial rotor retaining arrangement, and a radial friction bearing. The pump housing includes a closed housing wall. The pump rotor body includes a vane slit which supports the shiftable vane to define rotating pumping chambers, an axial low-pressure end which is axially supported by the closed housing wall so that a gas pressure inside the pumping chambers is present at the low-pressure end, and an axial high-pressure end. The pump housing is fluidically open at the axial high-pressure end so that atmospheric pressure is present. The axial rotor retaining arrangement includes a retaining sheet body arranged in a transversal plane which axially in part blocks the axial high-pressure end. The radial friction bearing is arranged axially between the vane slit and the axial high-pressure end.

Claims12

Dependent claims

1-11. (canceled)

An automotive vacuum pump for pumping a gas, the automotive vacuum pump comprising:

a pump housing configured to define a pump cavity, the pump housing comprising a closed housing wall;
a shiftable vane;
a pump rotor body comprising,
at least one vane slit which is configured to support the shiftable vane so as to define at least two rotating pumping chambers,
an axial low-pressure end which is axially supported by the closed housing wall so that a gas pressure inside the at least two rotating pumping chambers is present at the low-pressure end of the pump rotor body, and
an axial high-pressure end,
the pump housing being configured to be fluidically open at the axial high-pressure end so that atmospheric pressure is present at the axial high-pressure end;
a separate axial rotor retaining arrangement comprising a separate retaining sheet body which is arranged in a transversal plane and which is configured to axially block at least partially the axial high-pressure end of the pump rotor body;
and
a radial friction bearing arranged axially between the at least one vane slit and the axial high-pressure end of the pump rotor body.

7 more elements

Dependencies are inferred from the claim text.

Facts

Application

16/082,275Filed 7 Mar 2016

Published

28 Mar 2019

Term ends

Not estimatedThe source records don’t support an estimate.

Classification11 codes

F04C 25/02
Adaptations of pumps for special use of pumps for elastic fluids: for producing high vacuum
F01C 21/089
Construction of vanes or vane holders: for synchronised movement of the vanes
F01C 21/108
Stators; Members defining the outer boundaries of the working chamber: with an axial surface, e.g. side plates
F04C 18/3441
With vanes reciprocating with respect to the inner member: the inner and outer member being in contact along one line or continuous surface…

Automotive vacuum pump

Life of this patent

Automotive vacuum pump

Life of this patent

Abstract

Claims12