Caterpillar Tractor Co.

John B Waggoner

Eugene E Latimer

Edward L Stapleton

The invention is concerned with an improvement in a hydraulic reservoir which comprises a tank having internally thereof filter means attached longitudinally between a first and a second generally parallel side thereof, said filter means including generally tubular filter element means extending generally longitudinally between said first and second sides of said tank and means for introducing a hydraulic fluid from an exterior of said tank to an interior of said element means from adjacent said first side of said tank. The improvement of the invention comprises a tube within said tank surrounding said element means and extending longitudinally generally the length thereof, said tube including exit means therethrough through which said hydraulic fluid passes after passage thereof from the interior to an exterior of said element means, a first end of said tube sealing adjacent said second side of said tank and a second end of said tube sealing adjacent said first side of said tank. Also a part of the improvement of the invention is baffle means within said tank arranged to receive generally all of said hydraulic fluid which passes through said exit means, said baffle means conducting said hydraulic fluid to below fluid level in said reservoir and having egress means therefrom wholly below said normal fluid level.

Filter arrangement with baffles

The invention is concerned with an improvement in a hydraulic reservoir which comprises a tank having internally thereof filter means attached longitudinally between a first and a second generally parallel side thereof, said filter means including generally tubular filter element means extending generally longitudinally between said first and second side of said tank and means for introducing a hydraulic fluid from an exterior of said tank to an interior of said element means from adjacent said first side of said tank. The improvement comprises a tube within said tank surrounding said element means and extending longitudinally generally the length thereof, said tube including exit means therethrough through which said hydraulic fluid passes after passage thereof from the interior to an exterior of said element means, a first end of said tube sealing adjacent said second side of said tank and a second end of said tube sealing adjacent said first side of said tank. Also part of the improvement is an opening through the second side of the tank to an interior of the tube adjacent the first end thereof sized to allow entry of the element means to the interior of the tube. Cover means are provided sealingly attachable over the opening and attachable longitudinally through the tube to adjacent the first side of the tank. Extending means extend from the cover means toward the first side of the tank within the tube. Compressible spring means supported by the extending means compress the element means toward adjacent the first side of the tank. Means are also provided for preventing the spring means from sliding away from the extending means.

Filter holding means

The invention is concerned with an improvement in a hydraulic reservoir which comprises a tank having internally thereof filter means attached longitudinally between a first and a second generally parallel side thereof, said filter means including generally tubular filter element means extending generally longitudinally between said first and second sides of said tank and means for introducing a hydraulic fluid from an exterior of said tank to an interior of said element means from adjacent said first side of said tank. The improvement of the present invention comprises a tube within said tank surrounding said element means and extending longitudinally generally the length thereof, said tube including exit means therethrough through which said hydraulic fluid passes after passage thereof from the interior to an exterior of said element means; and means for compressibly sealing a first end of said tube adjacent said second side of said tank.

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Joliet, IL, United States of America

John B Waggoner