Elgin Sweeper Co.

Ernest F Prescott

Donald L Hildebrand

Gerald N Kieft

Jack Mitchell

A street sweeper having a frame with a cab carried thereon. An engine is mounted on the frame for powering the sweeper. A series of operating mechanisms are supported on the frame for assisting in a sweepings pick-up operation. A series of hydraulic motors are provided with each being operatively associated with one of the mechanisms for operating the same. A single variable and reversible flow piston pump is operatively connected to the hydraulic motors and the hydraulic mechanisms for operating them at a constant speed. The engine operates the piston pump with a variable speed input. A control mechanism is mounted in the cab, and electrical circuit means is connected between the control mechanism and the piston pump and cooperable with said control mechanism enabling for selective operation of the mechanisms at selective rotational speeds for assisting in a sweepings pick-up operation.

Hydraulic control system for a street sweeper

A street sweeper having a frame with a cab positioned at a forward end of the frame. A hopper is provided for receiving sweepings carried on the frame behind the cab. Linkage is further provided for enabling the hopper to be moved over the cab to a forward dumping position. Outriggers are positioned at a forward end of the sweeper. Hydraulic circuit means, valve means, and ram means collectively cooperable together and sequentially operable to initially move the outriggers into ground engagement to provide additional support for the hopper when in the forward dumping position and then operable to actuate the linkage to move the hopper over the cab for dumping.

Street sweeper having an elevating hopper with supporting outriggers

A self-propelled street sweeping machine or sweeper which includes a main frame. A dirt hopper and a main broom are mounted on the frame along with a conveyor. The conveyor is positionable relative to the frame for receiving sweepings from the main broom and for discharging the sweepings into the dirt hopper. Means are provided on the sweeper for enabling the main broom and the conveyor to move selectively of a transport position to a sweeping position and vice versa. The frame is supported by front and rear axles carried on wheels and spring means are provided between the rear axle and the main frame to enable an easier ride while the sweeper is operated in the transport position. Lockout means has been provided between the frame and spring means, and it is only effective to lock out the spring means preventing relative movement between the frame and the rear axle when the conveyor is placed in the sweeping position to receive sweepings but ineffective to inhibit operation of said spring means when the conveyor is moved into the transport position.

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Elgin, IL, United States of America

Ernest F Prescott