Oil feed nut and oil reservoir for a vacuum pump
AssigneeEdwards Limited
InventorsAndrew Cobbett, Keith Weston, Richard Glyn Horler
Life of this patent
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Abstract
Oil feed nut for providing a lubricant to a bearing of a vacuum pump comprising a first end and an opposite second end and being configured to be connected to a shaft of the vacuum pump. Further, the oil feed nut comprising an oil feeding element extending between the first end and the second end, wherein the oil feeding element has an increasing diameter towards the second end to create an increasing rotational force acting on the lubricant in order to convey the lubricant towards the second end, and a bearing journal element having a cylindrical surface configured to be received in a back-up bearing of the vacuum pump. Therein, the back-up bearing is arranged in a cartridge of an oil reservoir.
Claims7
An oil reservoir configured to be connected to a housing of a vacuum pump, comprising:
- a cartridge containing a lubricant to be provided to a bearing of the vacuum pump,
- a feeding tip to be in contact with an oil feed nut of the vacuum pump to apply the lubricant onto a surface of the oil feed nut, and
- a back-up bearing arranged in the cartridge configured to receive a bearing journal element of the vacuum pump.
A kit comprising:
- an oil feed nut comprising:
- a first end and an opposite second end and being configured to be connected to a shaft of a vacuum pump,
- an oil feeding element extending between the first end and the second end, wherein the oil feeding element has an increasing diameter towards the second end to create an increasing rotational force acting on a lubricant in order to convey the lubricant towards the second end;
- and
- a bearing journal element having a cylindrical surface configured to be received in a back-up bearing of the vacuum pump, wherein the bearing journal element is arranged at the first end and the oil feeding element is arranged at the second end;
- and
- an oil reservoir configured to be retrofitted to the vacuum pump, the oil reservoir comprising:
- a cartridge containing the lubricant to be provided to a bearing of the vacuum pump,
- a feeding tip to be in contact with the oil feed nut of the vacuum pump to apply the lubricant onto a surface of the oil feed nut, and
- the back-up bearing arranged in the cartridge configured to receive the bearing journal element of the oil feed nut.
Dependencies are inferred from the claim text.