US 3157262 A
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Nov. 17, 1964 L. P. CHAPDELAINE TELESCOPIC CHUTE 2 Sheets-Sheet 1 Filed April 1, 1963 m/vmro/a Lou/'5 ,P. Cl/AFDELAl/VE AITOR/VEYS 2 Sheets-Sheet 2 INVENTOR ATTORNE Y5 L. P. CHAPDELAINE TELESCOPIC CHUTE 4011/5 R CHAPDELAINEI Nov. 17, 1964 Filed April 1, 1963 United States Patent 3,157,262 TELESCOPIC CHUTE Louis Philippe Chapdelaine, 227 Rue Royale, Sorel, Quebec, (Ianada Filed Apr. 1, 1963, Ser. No. 269,406 Claims. (Cl. 19310) The present invention relates to a telescopic conveying chute for use particularly with a transit concrete mixer.
Such chutes are mounted at the rear or discharge end of a concrete mixer and are swingable laterally as well as upwardly, so as to direct the concrete wherever needed within a limited radius around the discharge end of the transit concrete truck.
Such chutes are known which are made up of a series of telescopic sections and adapted to be contracted into compact form so that, when mounted at the rear end of a transit mixer, the sections which are nested into one another are well within the width of the transit mixer and do not extend beyond the sides thereof. When the sections are extended, they are capable of conveying the concrete discharged from the mixing drum to a substantial distance and within a convenient area.
A main object of the invention is to provide a telescoping conveying chute for transit concrete mixer, which can expand to an appreciable distance from the mixer to thus deposit the concrete mixture into many positions to which it would otherwise have to be moved by some other conveying means, usually with Wheelbarrows or by manual labor.
Another object of the invention lies in the provision of an extensible telescopic conveying chute, which will considerably save both time and labor in the laying of concrete for roads, streets, foundations and the like.
A further object of the invention lies in the provision of a conveying chute adapted for transit concrete mixer and of particular use in the laying of concrete foundations which spread over a wide area such as the laying down of concrete slabs to form floors, whereby the concrete may be discharged at a point very close to where it is ulti mately laid and tamped into final form without being manually moved by shovels or the like from one location to another.
Yet a further object of the invention consists in providing a telescopic chute of the above type which is of very simple form and can easily and cheaply be manufactured While being provided with means for causing extension and retraction of the various sections also of simple design so as to be easily repaired or replaced, if broken. It must be remembered that ths chute is for particular use on a transit concrete mixer and, therefore, it is'important that it be of simple design so that it may easily be repaired if it happens to break down at locations where parts or tools are not easily accessible.
The various above-mentioned objects may be obtained with a telescopic chute of the invention which comprises a series of telescopically connected conveying sections movable from a retracted nested position to an extracted position, wherein the sections are in the continuation of one another and formed of a fixed first section, movable intermediate sections and a movable last section. For causing extension and retraction of the chute, a pulley is provided at each end of each intermediate section and a first cable is used having one end fixed to each but the last section, winds around one of the end pulleys of the following section and is secured, at the other end thereof, to the second following section. Also, a second cable is provided which has one end fixed to each but the last section,'winds around the other of the end pulleys of the following section and is secured, at the other end, to the second following section, between the two pulleys. Fi-
nally, power means is provided for moving the second section and thus forcing corresponding movement of all movable sections.
A better understanding of the invention will be afforded by the description which follows of a preferred embodiment having reference to the appended drawings wherein:
FIGURE 1 illustrates the invention in a perspective view: the transit concrete mixer to which it is attached being shown in broken lines;
FIGURE 2 is an enlarged half cross-sectional view of the conveying chute when in retracted nested condition;
FIGURE 3 is a side elevation view of a conveying chute made according to the invention, the chute being cut in half along the longitudinal axis so as to illustrate the internal structure of the extensible means;
FIGURE 4 is an elevation view particularly of the chord and pulley means for causing extension and retraction of the chute.
Chute l of the invention is formed of at least three sections 3, four such sections being shown in FIGURE 1. As said previously, the sections are designed for telescoping into one another and to be pivotally mounted as by pivot 5 to the rear end or discharge end of a transit concrete mixer 7. Pivoting about the pivot 5, in a vertical plane, is obtained by means of a power ram 9. .It should also be understood that chute 1 is mounted for pivoting in a horizontal plane, that is, laterally of mixer 7 by being secured to a plate 11 pivotable about a vertical axis, not shown.
All but the forward section are identical but decreasing in size from the inlet section connected to the discharge of the mixer to the discharge section. The general outline of the sections is illustrated in FIGURE 2, and it will be seen that it is formed of a central arcuate trough-like top part, which is the conveyor part proper to which is connected the side walls 15. The latter are bent inwardly at their lower end to form bottom structure 17 which, in the case illustrated, comprises a lateral ledge 19 on each side of the chute structure interconnected by means of transverse braces 21.
The means for telescoping the sections from nested to extracted position and vice-versa is more particularly illustrated in FIGURES 3 and 4.
The chute comprises a first fixed section which is the one connected to the concrete mixer, intermediate sections and one end or discharge section, the intermediate and discharge sections being movable in relation to the first section.
In order that the power means of the invention may be put into practice, at least three sections must be provided, the first one of which will be fixed.
At each end of each intermediate section, pulleys 23 and 2.3 respectively are provided. It will be noted that a first pulley 23 is mounted on ledge 19 whereas the second pulley 23' is mounted on brace 21 and, therefore, offset from pulley 23 in respect to the longitudinal axis of the chute.
The power means for driving the sections is completed by the provision of two cable strands 25 and 25'. first strand 25 is fixed, at one end, to a post 27 of one section, winds around a pulley 23 mounted at one end of the following section and is fixed, at the other end thereof to a post 27' mounted on the second following section. In a similar manner, a second strand 25' is provided, which is also fixed, at one end thereof, to a section as on post 27, winds around a pulley 23' on the other end of the following section, and is connected, at the other end thereof, to a post 27 on the second following section. It will be understood that posts 27 and 27' need not be the same for the two cables 25, 25'. It is only necessary for one cable to have one end attached to one section, while the other end is attached to the second following section,
The I while in the meantime winding around an end pulley of the immediately following section.
A hydraulic ram 29 may serve to actuate the section such a ram having one end fixed to the body of the concrete mixer, while the other end is secured to the forward end of the second section.
Thus, it Will be seen that when ram 29 pulls in the drection of the arrow in FIGURE 3, movement of the second section will force like movement of the following section due to strand 25 which connected to post 27 of the said following section; this action is repeated for all sections.
In a similar manner, if power ram 29 moves in the other direction, pulley 23 will, by means of strand 25' one end which is connected to post 27' of the following section, force movement of the following section in the same direction.
Although a preferred embodiment of the invention has just been described, it will be understood that various modifications may be made thereto without departing from the spirit of the invention, the scope of which is set forth in the appended claims.
1. A telescopic chute for the conveying of flowable material, comprising:
(a) three telescopically connected conveying sections movable from a retracted nested position to an extracted position wherein the sections are in the continuation of one another;
(1)) said sections including a fixed first section followed by a second and third movable sections;
(c) a pulley at each end of said second section;
(d) a first cable having one end secured to said fixed section between the two pulleys, winding around one of said pulleys and secured, at the other end to the third section, between the two pulleys;
(e) a second cable having one end secured to said fixed section winding around said other pulley and secured at the other end to said third section, between the two pulleys;
( means for moving said second section to thus force corresponding movement of said third section.
2. A telescopic chute as claimed in claim 1, wherein said moving means is a hydraulic ram having one end connected to a fixed point and the other end to said second section.
3. A telescopic chute for the conveying of flowable material, comprising:
(a) a plurality of telescopically connected conveying sections movable from a retracted nested position to an extracted position wherein the sections are in the continuation of one another; said sections being formed of a fixed first section movable intermediate sections and a movable last section;
(b) a pulley at each end of each intermediate section;
(0) a first cable having one end fixed to each but the last section, winding around one of the end pulleys of the following section and secured, at the other end, to the second following section;
(d) a second cable having one end fixed to each but the last section, winding around the other of the end pulleys of the following section and secured, at the other end, to the second following section, between the two pulleys;
(6) power means for moving one of said intermediate sections to thus force corresponding movement of all movable sections.
4. A telescopic chute as claimed in claim 3, wherein said moving means is a hydraulic ram having one end connected to a fixed point and the other end to said second section.
5. A telescopic chute as claimed in claim 3, wherein each but the last section is formed of an arcuate troughlike top part for conveying material, downwardly directed side walls and an in-turned bottom structure below said top connected to said side walls; said pulleys of said intermediate sections being mounted in pairs on each side of each section; the pulleys of each pair being offset in relation to the longitudinal axis of the chute.
References Cited in the file of this patent UNITED STATES PATENTS 566,841 Charroin Sept. 1, 1896 581,326 Anderson Apr. 27, 1897 648,741 Hartley May 1, 1900 FOREIGN PATENTS 424,166 Germany Ian. 20, 1926