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US 10,683,864 B2Granted
Twin vane rotary vacuum pump
AssigneeWABCO Europe BVBA
InventorsDavid Heaps, Simon Warner, Paul Wellings
Life of this patent
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Abstract
Vacuum pump (1), comprising a housing (2) having an inlet (4) and an outlet (6) and defining a chamber (8) within the housing (2), a rotor (10) for rotational movement about a rotational axis (AR) within the chamber (8), and at least a first and a second vane (22, 24) received in respective first and seconds slots (16, 18) formed in the rotor (10). The first and second slots (16, 18) are substantially parallel to each other, and a length (LV) of each vane (22, 24) is larger than a length (LS) of the respective slot. Production method of such a vacuum pump.
Claims20
A vacuum pump, comprising:
- a housing having an inlet and an outlet;
- a chamber within the housing;
- a rotor configured to undergo rotational movement about a rotational axis within the chamber, and
- at least a first vane and a second vane, the first vane and the second vane being received, respectively, in a first slot and a second slot, the first slot and the second slot being formed in the rotor,
- wherein the first slot and the second slot are substantially parallel to each other,
- wherein a length of the first vane is greater than a length of the first slot,
- wherein a length of the second vane is greater than a length of the second slot, and
- wherein the first slot and the second slot are formed as secants and are symmetrical to each other about the rotational axis of the rotor.
5 more elements
A vacuum pump, comprising:
- a housing having an inlet and an outlet;
- a chamber within the housing;
- a rotor configured to undergo rotational movement about a rotational axis within the chamber, and
- at least a first vane and a second vane, the first vane and the second vane being received, respectively, in a first slot and a second slot, the first slot and the second slot being formed in the rotor,
- wherein the first slot and the second slot are substantially parallel to each other,
- wherein a length of the first vane is greater than a length of the first slot,
- wherein a length of the second vane is greater than a length of the second slot,
- wherein the rotor comprises first and second bridges, and
- wherein the first bridge intersects the first slot and the second bridge intersects the second slot for connecting opposing portions of the rotor.
6 more elements
A production method for manufacturing a vacuum pump comprising:
- providing a housing having an inlet and an outlet, the housing defining a chamber therein;
- providing a drive shaft;
- over moulding a rotor on the drive shaft, the rotor having a first slot and a second slot, wherein the first slot and the second slot are substantially parallel to each other;
- and
- providing a first vane and a second vane received, respectively, in the first slot and the second slot, wherein a length of the first vane is greater than a length of the first slot, wherein a length of the second vane is greater than a length of the second slot, and wherein the first slot and the second slot are formed as secants and are symmetrical to each other about a rotational axis of the rotor.
2 more elements
A vacuum pump, comprising:
- a housing having an inlet and an outlet;
- a chamber within the housing;
- a rotor configured to undergo rotational movement about a rotational axis within the chamber, and
- at least a first vane and a second vane, the first vane and the second vane being received, respectively, in a first slot and a second slot, the first slot and the second slot being formed in the rotor,
- wherein the first slot and the second slot are substantially parallel to each other,
- wherein a length of the first vane is greater than a length of the first slot,
- wherein a length of the second vane is greater than a length of the second slot,
- wherein the first slot includes a radially inner surface that extends, in a plane perpendicular to the rotational axis, from a first point on a circumference of the rotor to a second point on the circumference of the rotor thereby forming a first secant line in the plane perpendicular to the rotational axis, and
- wherein the second slot includes a radially inner surface that extends, in the plane perpendicular to the rotational axis, from a third point on the circumference of the rotor to a fourth point on the circumference of the rotor thereby forming a second secant line in the plane perpendicular to the rotational axis.
6 more elements
Dependencies are inferred from the claim text.