Sliding vane vacuum pump with an oil relief valve

(19)

(11)

EP 2 249 041 A3

(12)	EUROPEAN PATENT APPLICATION

(88)	Date of publication A3:
	13.08.2014 Bulletin 2014/33

(43)	Date of publication A2:
	10.11.2010 Bulletin 2010/45

(21)	Application number: 10160926.1

(22)	Date of filing: 23.04.2010

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International Patent Classification (IPC):

F04C 18/344^(2006.01)
F04C 29/02^(2006.01)

F04C 28/28^(2006.01)
F04C 28/06^(2006.01)

(84)	Designated Contracting States:
	AT BE BG CH CY CZ DE DK EE ES FI FR GB GR HR HU IE IS IT LI LT LU LV MC MK MT NL NO PL PT RO SE SI SK SM TR
	Designated Extension States:
	AL BA ME RS

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Priority:

01.05.2009 GB 0907607

(71)	Applicant: Wabco Automotive UK Limited
	Morley Leeds LS27 0HQ (GB)

(72)	Inventors:
	Heaps, David Morley Leeds, LS27 0HQ (GB) Wellings, Paul Morley Leeds, LS27 0HQ (GB)

(74)	Representative: Gray, James et al
	Withers & Rogers LLP 4 More London Riverside London SE1 2AU London SE1 2AU (GB)

(54)	Sliding vane vacuum pump with an oil relief valve

(57) A sliding vane vacuum pump includes a casing (10) having a cover which together define a cavity (12), a rotor and a vane slidably mounted to said rotor. The pump further includes an inlet passage (24) extending from the exterior of the pump to the cavity (12) and an outlet passage (20) extending from the cavity (12) to the exterior of the pump. The pump further includes an oil relief arrangement operable to vent lubricating oil to the exterior of the pump in the event of reverse rotation of the rotor and vane.

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