US1193888A - Robert w - Google Patents

Description

R. W. FURNAS, DECD.

F. A. & L. r. HAMILTON. EXECUTOR AND EXECUTRIX.

STREET SWEEPER HOOD.

APPLICATION FILED OCT. 8. 1914.

Patbnted Au a fl a WITNESSES:

A TTOR/VE 5 HL NOR?! nu UNITED STATES PATENT OFFTQE.

ROBERT W. FURNAS, OF INDIANAPOLIS, INDIANA; FRANK A. HAMILTON AND LELIA F. HAMILTON EXECUTOR AND EXECUTRIX OF SAID FURNAS, DECEASED.

STBEET-SWEEPER HOOD.

Specification of Letters Patent.

Patented Aug. 8, 1916.

T 0 all whom it may concern:

Be it known that 1, ROBERT WV. FURNAs, a citizen of the United States, residing at Indianapolis, in the county of Marion and State of Indiana, have invented a new and useful Street-Sweeper Hood, of which the following is a specification.

It is the object of my invention to improve the construction of hoods for pneumatic sweepers, especially those which operate in a closed cycle system; and more particularly to provide a better forward sweeping action, to prevent eddying of the air currents, and to lessen the wear on and the chance of breaking or bending the rear wall of the inner chamber of such hood.

The accompanying drawing illustrates my invention.

Figure 1 is a vertical sectional view through a hood embodying my invention; and Fig. 2 is an enlargement of that part of Fig. 1 which shows the inner chamber of the hood.

The hood frame 10 is suitably hung, as by wires or chains 11, from an intermediate supporting frame 12, in turn hung by suit able lifting wires or chains 13 from the vehicle frame 14, on which the pneumatic apparatus (not shown) is carried. The hood frame 10 is provided with caster-type rollers 15, for engaging the ground, and is connected by tension rods or chains 16 to a suitable part of the vehicle frame 14, whereby it is dragged over the ground.

The hood has an outer chamber 20 and an inner chamber 21. In the form illustrated, the outer chamber is formed by rigid front and rear transverse walls 22 and rigid end walls 23, the latter conveniently.extending downward to the street surface, while the former are some distance above the street surface and are provided with flexible, depending, street-engaging walls 24, preferably of canvas weighted in some suitable manner, as by plates 25. From the upper edges of the outer chamber walls an outer flexible tube 26 extends upward to the vehicle frame 1a, where it is suitably attached and opens to the discharge side of the pneumatic system.

The inner chamber has transverse front and rear walls 30 and 31, the front wall being substantially similar to the walls 24, though preferably weighted somewhat more is fastened. From the center of the roof 34c rises a chimney 37 opening at its upper end into an inner flexible tube 38, located within the outer flexible tube 26 and connected to the suction tube 39 of the pneumatic system.

The suction created in the tube 39 causes air to pass inwardly under the flange 33, and to a slight extent under the front wall 30, to the inner chamber 21, and thence up through the chimney 37, the flexible tube 38, and the suction tube 39 to the pneumatic system. This air carries with it the dirt on the street surface. The air entering the inner chamber 21 under the walls 30 and 31 necessarily comes from the surrounding outer chamber 20, thus tending to reduce the pressure in such chamber. The outer chamber is mainly supplied with air from the discharge side of the pneumatic system, though there is a slight inward leakage under the walls 23 and 24, merely enough to compensate for any outward air currents from such pneumatic system.

The flange 33 causes the air entering the inner chamber under the wall 31, where most of such air enters such chamber, to travel for some distance in close contact with the street surface, and thus sweeps forward the dirt from such surface into the inner chamber. The air thus entering this inner chamber is substantially free from eddying, with its concomitant loss of energy and of some of the dirt carried by the air, because of the comparatively slight angle between the portion 32 and the flange 33 of the wall 31, and this absence of eddying helps the aforesaid forward-sweeping action.

I claim as my invention:

A hood for pneumatic street sweepers having inner and outer chambers open to the surface of the ground, the rear wall of the inner chamber being inclined rearwardly and downwardly, and having at its lower twenty-sixth day of September, A. D. one

edge in rearwaci'dly and sukfstantially horithousand nine hundred and fourteen.

zonta y exten ing flange tie rear edge of which flange is Well forward of the rear Wall ROBERT FURNAS' of the Outer chamber. Witnesses:

In Witness whereof, I have hereunto set JOSEPHINE GAsPER,

my hand at Indianapolis, Indiana, this G. B. SOI-ILEY.

Copies of this patent may be obtained for five cents each, by addressing the Commissioner of Patents, Washington, D. 0.

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