Patent ID: 7718060
Filing Date: 2010-05-18
Classification: B01D

Abstract:
1. A filter device comprising: a head in which fluid flows a filter element that filters the fluid; a housing that encloses the filter element, the housing having an opening at a first end through which the filter element is inserted into and removed from the housing, the housing further having an annular groove formed around an inner periphery of the housing at the first end; and an element pressing part disposed at an end of the filter element for releasably holding the filter element inside the housing, the element pressing part comprising an annular main body secured to the end of the filter element and at least two spring parts disposed at angular intervals in a single plane that is transverse to an axis of the housing, each spring part having an arcuate arm that extends in the single plane spirally outwardly from the main body and a contact part that is provided at a free end of the arcuate arm, each contact part having an engagement part engageable with a human finger, the element pressing part being made of an elastic material such that the arcuate arms are readily bendable in the single plane towards the main body by finger force applied to the engagement parts to thereby move the contact parts radially inwardly, wherein, when the filter element is placed in the housing, the contact parts of the element pressing part are trapped in the annular groove of the housing and the element pressing part holds the filter element inside the housing with engagement between the contact parts and the groove, whereas when removing the filter element from the housing, finger force is applied to the engagement parts of the element pressing part to bend the arcuate arms towards the main body and move the contact each contact parts radially inwardly out of the groove to free the element pressing part from the groove.