Importance

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Abstract

An improved filter screen device is provided which comprises an elongated, tubular housing, a hollow elongated perforated tubular member releasably secured in the hollow central interior of the housing and a flexible sock-type filter screen releasably disposed over the outer surface of the tubular member in the housing. The housing includes an open upstream end which is closed by the tubular member and a closed opposite downstream end. An inlet is disposed at an acute angle to the length of the housing and intersects the housing interior between its upstream and downstream ends. A first outlet is disposed at the downstream end along about the longitudinal axis of the housing so as to communicate with the interior of the hollow tubular member. A second outlet is also disposed in the downstream end of the housing at an angle to the first outlet and communicates with a space between the filter screen and the housing. The inlet is configured to cause liquid passing therethrough into the housing to spiral over the outer face of the screen. Liquid passing through the screen and the perforated tubular member exits the device through the first outlet while particles removed from the stream by failure to pass through the screen are removed from the space between the screen and housing through the second outlet.

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First Claim