Caterpillar Tractor Co.

Edward J Ohms

James E Gee

Carroll R Cole

Wayne A Peterson

Craig W Riediger

A scraper (10) has a bowl (12) and floor (14) and is of a construction sufficient for receiving an auger (18). Material entering the bowl (12) is sometimes lodged between the auger (18) and floor (14). Apparatus (24) is provided for diverting incoming material and preventing the lodging of material between the auger (18) and floor (14).

Material diverting apparatus for an auger scraper

Scraper apron assembly

A scraper which has a bowl provided with an upright auger has a bottom bearing assembly on the bowl floor which supports the auger. The bearing assembly has a fixed lower housing with a stepped cavity containing bearings, and an upper housing rotatably carried in the bearings that has a through bore affording a lubricant chamber. The lower and upper housings have confronting external flanges between which is a metal-to-metal lubricant seal having elastomeric rings that must be compressed to make the seal effective. The bearing assembly includes surface engaging preload means in the through bore to depress the upper housing and thus compress the elastomeric rings, after which a cover plate is fastened on the top of the upper housing member and the lower end of the auger shaft is seated on a mating square stub on the cover plate. The weight of the auger further depresses the upper housing to disengage the surfaces of the preload means.

Bearing assembly for an auger scraper

A control system for the hydraulically powered auger of a self-loading auger scraper that has a hydraulic cushion hitch which is locked out when the scraper is loading. A multiposition manually controlled pilot selector valve which is used to lock out the cushion hitch also initiates operation of the auger. The control system includes a pilot operated, normally open auger control valve through which flow of a signal line for a normally open unloading relief valve goes to drain. Moving the pilot selector valve from a first to a second position pressurizes the pilot line to close the auger control valve and thus isolate the signal line from drain, closing the unloading relief valve to isolate a pump for the auger motor from drain and cause it to power the motor.

Auger control system for a scraper

A control system for the hydraulically powered auger of a self-loading auger scraper that has an ejector operated by a hydraulic cylinder. One manual control valve starts and stops the auger in conjunction with loading. A second manual control valve powers the ejector cylinder and simultaneously operates a valve to start the auger independently of the first manual control valve.

Load ejection improvement for auger scrapers

A vibration absorber for lift trucks is provided which acts to cushion the lift mast and counteract the tendency for the truck to engage in forward and rear pitching or loping when the tires encounter a bump or other ground discontinuity. The absorber includes an accumulator hydraulically connected to the mast tilt cylinder which is gas pressurized and a conduit connecting the accumulator with the tilt cylinders. An orifice within the conduit is sized in accordance with the truck as a primary mass and the mast fork load as the secondary mass to achieve the desired shock absorbing and damping effect.

Cushioned mast for lift trucks

A pair of hydraulic motors are operatively drivingly connected to a common rotatable member and are employed for transmitting power thereto from a pair of prime movers. A first hydraulic circuit communicates with one of the hydraulic motors and includes a pump driven by one of the prime movers while a second hydraulic circuit communicates with the other of the hydraulic motors and includes a fixed displacement pump and a variable displacement pump driven by the other prime mover. A device associated with the variable displacement pump is responsive to fluid pressures in the first and second hydraulic circuits for automatically varying the output displacement of the variable displacement pump so that a predetermined relationship is maintained between the fluid pressures in the first and second hydraulic circuit.

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Decatur, IL, United States of America

Edward J Ohms