Filter case assembly

Claim 1

A filter case assembly, comprising a filter housing having an open top and a side wall with an opening on one side and a discharge opening on the opposite side, a hollow cylindrical filter disposed in said housing between said inlet opening and said discharge opening, a cover closing the top of said housing and a valve body carried by said cover having a substantially central cylindrical body portion at least as wide as said inlet opening and disposed in the flow path between said inlet and outlet openings and forming a buffer against the working pressure flow from said inlet to said outlet, said body having a first hollow tubular portion extending in the direction of flow from said inlet to said outlet from said cylindrical body to said outlet and a second tuBular portion extending from said cylindrical body downwardly into the bore of said hollow cylindrical filter, said filter housing having a valve in the flow passage between said first and second tubular portions with a valve seat in said flow passage, a relief valve movable over said seat and, spring means biasing said relief valve in a predetermined direction in respect to said seat, said cover being reversible along with said cylindrical body and said first and second tubular members in order to connect said first tubular member from said cylindrical valve body to said inlet with the connection of said second tubular portion remaining in the bore of said hollow cylindrical filter whereby to change the flow direction through said filter case assembly.