John Patten Waggoner

US Patent:

40425053, Aug 16, 1977

Filed:

Aug 30, 1976

Appl. No.:

5/719005

Inventors:

John B. Waggoner - Joliet IL

Assignee:

Caterpillar Tractor Co. - Peoria IL

International Classification:

B01D 2710
E03B 1100

US Classification:

210132

Abstract:

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.

US Patent:

49149130, Apr 10, 1990

Filed:

May 3, 1989

Appl. No.:

7/346965

Inventors:

Gene R. St. Germain - Plainfield IL
John B. Waggoner - Shorewood IL

Assignee:

Caterpillar Inc. - Peoria IL

International Classification:

B62D 508
B62D 5097
F15B 13042

US Classification:

60384

Abstract:

Flow amplified control systems are useful in pilot operated steering systems. The load responsive flow amplified control system includes a directional control valve movable to an operating position to direct fluid from the operating fluid circuit through a variable orifice to a steering motor and to direct control fluid from a control fluid circuit through another variable orifice to be combined with the fluid going to the steering motor. The operating fluid circuit and the control fluid circuit are provided with fluid from a common variable displacement pump. The directional control valve is moved to an operating position by the control fluid acting thereon and is pressure compensated insofar as the flow of control fluid passing through the another variable orifice such that a substantially constant predetermined pressure differential exists across the another variable orifice. The rate of fluid flow in the pilot control circuit is determined by a steering control valve and is utilized for controlling the position of the directional control valve. The displacement of the variable displacement pump is responsive to the pressure condition in the pilot control circuit such that a substantially constant predetermined pressure differential exists between the variable displacement pump and the load pressure in the steering motor.

US Patent:

40353001, Jul 12, 1977

Filed:

Aug 30, 1976

Appl. No.:

5/718693

Inventors:

Edward L. Stapleton - Joliet IL
John B. Waggoner - Joliet IL

Assignee:

Caterpillar Tractor Co. - Peoria IL

International Classification:

B01D 2708

US Classification:

210172

Abstract:

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.

US Patent:

40425088, Aug 16, 1977

Filed:

Aug 30, 1976

Appl. No.:

5/719004

Inventors:

Eugene E. Latimer - Wilmington IL
John B. Waggoner - Joliet IL

Assignee:

Caterpillar Tractor Co. - Peoria IL

International Classification:

E03B 1100

US Classification:

210172

Abstract:

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.