Patent ID: 8221619
Filing Date: 2012-07-17
Classification: B01D,Y10T

Abstract:
1. An end cap for an oil filter, comprising: a combination dual valve element defining an integral anti-drain back valve and an integral relief valve; a seal combination ring adapted to seal the combination dual valve element into a body of the oil filter, and cooperating with the combination dual valve element to form a relief valve portion thereof; an ADB sealing lip of the combination dual valve element, defining an anti-drain back valve portion thereof; an RV sealing lip of the combination dual valve element, defining the relief valve portion with the seal combination ring; and retracting ribs of the RV sealing lip, for facilitating closure of the relief valve portion below a pre-defined pressure differential threshold, wherein: the combination dual valve element further comprises support lugs defining flow zones of the relief valve portion, and each of the support lugs corresponds to a plurality of the retracting ribs, such that a respective support lug extends circumferentially beyond circumferential edges of the corresponding plurality of the retracting ribs.