Dual hydraulic filter arrangement

Claim 1

A dual filter arrangement for use in a hydraulic system comprising, a filter housing means defining an inlet passage means and an outlet passage means, said filter housing means defining a plurality of filter chambers in parallel relationship between the inlet and outlet passage means with each chamber connected to said inlet passage means and connected to said outlet passage means, valve means in the inlet passage means with a valve adjacent and controlling flow to each of said chambers including a valve element and a valve seat, actuating means connected to each said valve element and extending into the adjacent of said filter chambers, means normally biasing each said valve element to a closed position with its valve seat closing the inlet passage means to the respective filter chamber, said filter housing means defining an end opening for each of said chambers for receiving a filter cartridge, a filter cartridge received in a chamber of each of said filter chambers, a removable cover means having fastening means received in the end opening of each of said filter chambers with each one cover means closing one chamber, each cover means defining a recessed end portion providing passage means between said filter and said outlet passage means, each said cover means biasing each said filter for engaging said valve actuating means to thereby open each adjacent valve to permit fluid passage through said filter cartridge in said filter chamber and out said outlet when each cover means is located in the end opening of its filter chamber.