US2424460A - Intercepting rotor construction - Google Patents

Description

July 22, 1947.

Origihal Filed Dec. 2 Sheets-Sheet 1 July-22, 1947- H. c. HETTELSATER 2,424,460

INTERCEPTING ROTOR CONSTRUCTION Original Filed Dec. 15, 1945 2 Sheets-Sheet 2 a 'E I INVNTOR. 447 6mm ATTORNL'Y Patented July 22, 1947 INTERCEPTING'ROTOR CONSTRUCTION Henry C. Hettelsater, Whitefish Bay, Wis., assignor to Harnisclifeger Corporation, Milwaukee, Wis., a corporation of Wisconsin Original application December 13, 1943, Serial No. 514,177. Divided and this application Decemher 11, 1944, Serial No. 567,697

2 Claims. (Cl. 37189) The invention relates to a travelling material treating apparatus for conditioning the material used for making roads or other pavements at'the place of use. This-application is a division of my copen'ding application Serial No. 514,177, filed December 13, 1943, and relates more particularly to the target or intercepting rotor of said application.

According to the aforesaid application,- in the making'of'road or other pavements, the material operated upon by the soil treating unit is' subjected to action of a rotarycutter anda target rotorto thoroughly mix and blendthe material which is then transferred to a blading mill and deposited uponthe road bed. During the transfer of mixed road materials they are sprayed with a suitable binder ingredient with whichthey are thoroughly mixed by the blading mill before being deposited on the road bed. In this apparatus the target rotor has the function of intercepting the-material thrown back by the rotary cutter and returning it to the cutter for further pulverization and finally transferring the pulverized and blended material to the blading mill. It also has thefurther function of acting to shave or plane'down any ridges of materialin the subgrade left by the action of therotary cutter, and the object of this invention is to provide a target rotor which will perform the above named functions when used in a soil' treating unit of the type described.

The invention further consists in" the several features hereinafter described and included in the claims at the conclusion hereof.

In the drawings:

Fig. 1 is a vertical sectional view through a material treating unit, equipped with the target rotor embodying the invention;

Fig. 2 is a plan view of the material treating unit, parts being removed, parts being broken away, and parts being shown in section.

Referring to the drawings, the material treating unit comprises a housing 2 formed of plates 84, 85, 8B, and 8'! and having removable top doors 88, a transverse frame member 89 to which a suspensionlink H is-secured and carrying pivot pins T1 for connecting with suspension levers 36 secured to a transverse frame member 31 carrying a brace 4 I.

Thehousing 2 has four spaced shafts 90; I03, I08, and l09-journalled therein, said shafts respectively forming parts of a rotary cutter I01, a target rotor I02, and two blading mill rotors Ill].

The rotary cutter has cutting tine sockets 93 secured thereto in which the cutting tines at are suitably mounted.

Spaced from and parallelly disposed to the rear of cutting rotor It! is a target or material intercepting rotor I E32 mounted on a shaft IE3 having a tubular center portion with reduced end extensions carried in bearings held in the side plates 84 and 85. One of the extensions of shaft I83 passes through a, hearing I 64 held in the side plate 84. The tubular portion of shaft IE3 is provided throughout its length with four equally spaced radially extending longitudinal fins i516 welded in place.

ttached to the fins IE6 by bolting are a plurality of closely spaced resilient steel tongues I of uniform length, the tips of which are bent slightly as shown and out at a slight angle so as to sweep a substantially cylindrical surface in spite of the bend of the tip. The tips of the tongues Iti are bent so as to cause material engaged by the some to move laterally to some ex tent. As appears more clearly in Fig. 2, some of the tongues Iil'I are bent to cause lateral movement' of material in one direction and some in the other direction. The arrangement is such that one pair of diametrically opposed sets of tongues tends to divide material at the center of rotor I62 and move it toward the ends thereof; while the intervening pair of diametrically disposed sets of tongues tends to gather material from the ends of rotor Hi2 and move it toward the center. This general arrangement is subject to the exception that in the case of the sets of tongues bent to cause outward movement of ma terial, the outer tongues designated iii'IA are oppositely bent to minimize loss of material beyond the ends of the rotor Hi2. Since the object sought is an alternate transverse mingling ac tion of the material, other arrangements of the bent tongues IU'I may be resorted to with equal effectiveness, and some modification in this regard may be found advantageous in handling different types of material.

The rotor I02 is arranged to be turned'in the direction indicated by the arrow in Fig, 1 by driving means to be described more fully hereinafter. The rate of rotation of target rotor IE2 is preferably such that material deposited before it and impinging upon it by reason of the action of cutting rotor IEII, is moderately tossed, back into the more rapidly turning cutting rotor Nil from which it is again returned forcibly into the target rotor IIJZ. In the course of the back and forth movement of the material thus created, it is raised to successively higher levels in the target rotor I02 until it is finally caught by the target rotor I02 and tossed rearwardly. In this way the material is subjected to repeated impact and thus pulverized to a very substantial degree. Furthermore, in cases where dry material, such as sand or Portland cement, is spread upon the surface being worked upon in advance of the apparatus while working, a very thorough mixing and intermingling of the added dry particles with the pulverized soil is accomplished. In aid of this intermingling and mixing action, the slight lateral movement caused by the bent tips of the tongues I01 brings about a lateral blending also,

.which tends to obliterate any lack of uniformity transversely of the work strip caused by streaked spreading of the dry material.

While the target rotor I02 is in effect a complete paddle wheel because of the close spacing of the tongue I01, each tongue is independent and resilient so that it may yield if an obstruction such as a deeply buried boulder not cut away by the resilient cutting tines of the cutting rotor IOI is encountered. Because the tongues II)? are spaced from one another slightly, and are bent at their tips and may yield and thus incompletely sweep the excavated subgrade, successive sets of tongues making up the rotor I02 are staggered slightly as may be observed in Fig. 2 to ensure engagement of all material excavated by the target rotor I02.

It is also to be noted that the blades of the target rotor have a shaving or planing action on that portion of the road bed beneath it, so that if the cutters of the rotary cutter should leave ridges of material in this road bed, such ridges will be shaved off by the blades of the target rotor.

The rotors I I of the blading mill are provided with welded in place blade sockets III in which the shanks of replaceable blades I I2 are mounted.

For driving the rotors a double sprocket I28 is mounted on the shaft 90 and connects by a suitable chain drive IZ'I with a suitable source of power. A double sprocket I29 on shaft 90 connects by chain I34 with a double sprocket I35 on shaft I35 above the shaft I03 and connected thereto by reduction gearing I32 to drive the target rotor at a lower rate of speed than the cutting rotor IOI.

The shaft I35 has the double sprocket I36 mounted thereon connected by a chain I39 with a double sprocket I38 on the shaft I08 of the front blading rotor H0 and connected by gears I40, I42, I43, and I44 in a gear housing I31 with the shaft I09 of the rear blading rotor I I0 whereby said rotors I09 and H0 are synchronously driven in'opposite directions and at a slower rate of speed than the rotor IN.

A binder ingredient may be sprayed into the material being treated through distributor pipes I69 and I78 which are connected by a coupling 292 and which may be supplied with one or more types of binder ingredient through supply pipes I01 (one of which is shown) provided with an hydraulically operated out off valve I88.

The general mode of operation of the above described treating unit including the target rotor is, as follows:

The rotary cutter either digs or separates the road forming material from its base and throws it into the blades of the target rotor which, as previously noted, return parts of this material to the cutting rotors, and through a successive advance and return the material is finally transferred from the upper portion of the target rotor to the blading mill. During its passage to the blading mill .it is sprayed with a binder ingredient which may be a petroleum binder in the case of asphalt type pavements, or water in the case of a cement type pavement, and this binder ingredient is thoroughly intermixed with the material in the blading mill.

Material tossed rearwardly by the target rotor ticles of the material with the added bonding agent. Much of this material is then thrown forwardly again over the forward blading mill rotor for return with fresh material and for a repetition of the treatment which occurs between the two badin mill rotors. The remainder of the material not carried forwardly for recycling is carried over the top of the rear blading mill rotor and deposited on the subgrade in condition for rolling to complete the pavement.

I desire it to be understood that this invention is not to be limited to any particular form or arrangement of parts except in so far as such limitations are included in the claims.

What I claim as my invention is:

1.-In a target rotor for an apparatus of the class described, the combination of a shaft having a hub portion and a plurality of angularly spaced radial vanes having their shanks mounted on said hub portion and extending throughout the length thereof, said vanes comprising a series of closely spaced separate yieldable tongues of substantially uniform width from their shanks to their outer free ends and having tips angularly deflected lengthwise of the width thereof.

2. In a target rotor for an apparatus of the class described, the combination of a shaft and a plurality of angularly spaced radially disposed rows of wide faced blades mounted thereon, the blades of each row arranged in juxtaposition to form a substantially continuous blade surface but being individually yieldable and having angularly deflected tips, the deflection of the tips of the blades for some of the rows adapted to advance material from the center of the rotor toward its ends and those for other of the rows to advance material from ends of the rotor toward its center.

HENRY C. HETTELSATER.

REFERENCES CITED The following references are of record in the file of this patent:

UNITED STATES PATENTS Number Name Date 828,572 Rose Aug. 14, 1906 1,241,173 Von Meyenburg Sept. 25, 1917 1,291,772 Currier Jan. 21, 1919 1,547,802 Gasstrom July '28, 1925 7 1,714,347 Churchill May 21, 1929 1,744,170 Lajeunesse Jan. 21, 1930 1,757,908 Johnston May 6, 1920

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