Abstract: A method and apparatus for filtering suspensions of medical and biological fluids, one aspect of which is separating a suspension comprising at least two types of particles which are differently sized or shaped and in which the first type of particle may be deformable at a relatively lower force and/or faster rate than the second type of particle. A filter member is provided having substantially precisely dimensioned pore sizes, with the pores being dimensioned to allow passage of the first type of suspended particle without distortion or only minimal distortion and passage of the second type of particle only with substantial distortion.

Abstract: A rear seat for a motor vehicle includes a squab, the front of which is articulated to the motor-vehicle body, and a backrest connected to the body. The backrest can adopt a vertical position of normal use, a first lowered position in which it bears on the squab. and a second lowered position in which it bears directly on the floor after the squab has been pivoted forwards. A double articulation which enables the backrest to be put into these positions includes two articulation pins connected rigidly to the backrest and an S-shaped body which is carried by the vehicle body and whose two sides define two guide tracks with arcuate profiles which are engaged by the two pins.