Brushing – scrubbing – and general cleaning
Patent
1986-12-08
1989-04-25
Roberts, Edward L.
Brushing, scrubbing, and general cleaning
F01H 104
Patent
active
048234230
DESCRIPTION:
BRIEF SUMMARY
FIELD OF THE INVENTION
The invention relates to a street sweeping apparatus comprising a container for the sweepings and a pickup device for moving the sweepings from the street surface into the container.
DESCRIPTION OF PRIOR ART
A sweeping machine with these basic features is described in the German unexamined specification No. 2,326,241, in which the sweepings container is mounted on a dual purpose frame, which also bears the pickup device, and comprises longitudinal and transverse girders and may be used either to carry the container or a flatbed body so that the vehicle may be used as a standard truck. The frame also supports a sweeping device which has independent wheels for supporting it on the ground. The pickup device is a suction system whose suction truck has one end placed over the ground in the immediate vicinity of the sweeping device and whose other end is connected with the sweepings container. The aim of this construction is to arrange the sweepings container, the sweeping device and the pickup device in the form of a suction apparatus, as a self-contained unit, which may be dismounted from the vehicle by releasing fasteners between the frame and the vehicle so that the vehicle may then be used as a general purpose vehicle, as for example for transporting material to be spread on the road. Although this construction does make it possible for the vehicle to be rapidly converted for different applications, the subassembly carried by the frame has a large number of parts and is complex so that repairs and service operations thereon can only be performed slowly and require much labor. Accordingly, the pickup device is a suction device which although it is relatively expensive in the first place later gives little trouble. A further inherent feature of the construction is that the parts on the frame have their own drive which is independent of the drive of the vehicle.
SUMMARY OF THE INVENTION
The object of the invention is to provide a street sweeping apparatus which is compact, readily maneuvered and highly efficient, and which is simple to service. The apparatus is to be made up of such parts which may be so fitted together that in view of its operational advantages the apparatus may be produced at a low cost and can be serviced and repaired in short times. There are also a series of further features of the invention which are of considerable utility in other respects in addition to this purpose.
In accordance with the invention the sweeping device and the sweepings container are arranged independently of the vehicle, whereas the pickup device is a purely mechanical device which may be simply mounted on the vehicle and detached therefrom. In this respect, the street sweeping apparatus constitutes a compromise between a highly specialized, single-purpose vehicle as is frequently the case with sweepers, and a vehicle of the initially mentioned type. More especially, the sweepings container is a separately connectable and disconnectable part which may be simply mounted and detached without any particular trouble, whereas a pickup device of the type employed in the prior art has many parts and accordingly makes the vehicle complicated as its parts had to be separately attached to the vehicle. In this respect, it is an advantage if all the parts are united together as a single unit which may be attached and detached as a whole. The use of a purely mechanical pickup device leads to a whole series of advantages as compared with a pneumatic pickup device, including especially the reduced effects on the environment and the possibility of using conventional, and therefore readily, replaceable parts.
Although a pickup which is in some respects similar to that of the present invention has been described in the German unexamined specification No. 2,364,022, in the present invention the sweeping rollers of the pickup device mesh with each other like gear wheels, whereas the sweeping rollers in the aforesaid German specification make use of centrifugal force for feeding the sweepings and there is no
REFERENCES:
patent: 3087187 (1963-04-01), Hank et al.
patent: 3189932 (1965-06-01), Daneman
patent: 3243834 (1966-04-01), Trapp
Lex Peter
Schmid Max
Linnhoff GmbH
Roberts Edward L.
Saku Maschinenbav A. Schmid
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