The housing made of a resin composition is formed by injection molding with a sintered metal bearing sleeve as an insert piece. The housing includes a cylindrical body part, a sealing portion extending from the top of the body part radially inwards, and a bottom part closing the lower end of the body...http://www.google.se/patents/US20040017954?utm_source=gb-gplus-sharePatent US20040017954 - Fluid bearing device
