US2763074A - Slushing scraper - Google Patents

Description

p 13, 1955 T. c. WHISLER 2,763,074

swsnmc SCRAPER Filed Dec. 15, 1951 3 Sheets-Sheet l Sept. 18, 1956 T. c. WHISLER SLUSHING SCRAPER 3 Sheets-Sheet 2 Filed Dec. 15, 1951 T. C. WHISLER SLUSHING SCRAPER Sept. 18, 1956 3 Sheets-Sheet 3 Filed Dec. 15, 1951 INVENTOR. 772mm 6 77 266 nited States Patent SLUSHING SCRAPER Thomas C. Whisler, Alameda, Califi, assignor to American Brake Shoe Company, New York, N. Y., a corpo ration of Delaware Application December 15 1951, Serial No'. 261,824

8 Claims. (Cl. 37-147) This invention relates to a slushingscraper and more particularly to a scraper of a foldablecharacter having an alignment yoke pivotally attached within the body of the scraper.

In most conventional designs of slushingscrapers of the foldable type, the arms thereof curve upwardly from the rear of the scraper body over the top thereof and project forwardly of the main body of the scraper. These arms generally increase the overall. height of the scraper and are necessarily pivoted in such a way that they limit the degree to which the body can be opened with relation-to the arms. Also in the conventional type of construction, the ends of the arms which are pivotally secured to the scraper body are exposed to wear when the scraper is folded as it is being, moved to the rear in its backward cycle. Because of this exposed construction, rocks and muck often become lodged between the" ends of the arms and the body, and therefore do not allow the body to swing to the fully opened positionand alsocause undesirable wear on the moving parts of the scraper.

it is therefore an object of this invention to provide a foldable sloshing scraper having an improved: anti en.- ceptionally strong construction. and in which the moving parts have an unusually high resistance to wear an damage. I

Another object is to provide a scraper! of the character described inwhich the arms are so-pivote'd 'onthe body thereof that they can be disposed so that they do not add objectionable height tothe scraper, when it is in the opened position, and yet which: allow the bodyits'elf to be made of any desired height".

A further object is to provide such a scraper which: has at least in part a double wall construction whichcon struction permits the pivoted ends of the arms thereof to be housed within the body of the scraper, which adds to the rigidity of the body, and also enables runners to' be conveniently provided on the body for the scraper to ride on through its backward travel.

Another object. is to provide such a scraper in which the pivot pins for the arms have ends which are flush with the portion of the body in whichthey are mounted so that there are no projecting. parts to be? worn away, resulting in the pins being lost and finding their way into a crusher, or the like.

Still another object is to provide such a scraper which also has a bifurcated alignment yoke, the front end of which is slidably secured to the forward pull line and which therefore maintains the scraper in proper alignment at all times.

Yet another object is to provide amethod of attaching the forward and backward pull lines to the scraper body so that when a pull is applied to both the scraper will automatically move into the open position.

Further objects and advantages of this invention will become evident as the description proceeds and from an examination of the accompanying. drawings which illustrate one embodiment of the invention andin which similar numerals refer tosimilar parts throughout the several views.

In the drawings:-

Figure l is a view in elevation of one form of slushing. scraper embodyingthis invention, the scraper being shownin fully open position;

FigureZ is a view in side elevation,v partly broken away, of the scraper illustrated in Figure 1' in the fully closed position;

Figure 3 is a plan view from above of the scraper in the fully open position as shown in Figure 1 with portions broken away to show the method of pivotal attachment: of the arms to the body;

Figure 4 is a rear view in elevation of the scraper shown in Figure 1 with the pull lines removed;

Figure 5 is a view in vertical cross section of the bodyof the scraper, the view being taken along the line 55 of. Figure 4-;

Figure 6 is an enlarged view in section of a fragmentary portion of one arm and one. portion of the body of thescraper showing the method of attachment of the arm to the body, the viewbeing taken along the line 6:-6'0f Figure 1;

Figure 7 is a view from the rear of a portion of the upper rear edge. of the scraper showing the method of attachment of the forward pull lines;

Figure 8- is a' view in side elevation of the portion of the: scraper showing in Figure 7.

Referring now to Figures 1, 2 and 3, one form of scraper embodying the present invention is' disclosed therein; The body of the scraper, indicated generally by the-numeral 10,- is substantially in: the form of a scoop having! a base or: floor 12 which preferably curves upwardly'. at the rear to" form the arcuate rear wall 14. The two outer side walls- 16 ofthe body of the scraper taper downwardly from the upper edge of the rear wall to' the frontedge- 1 8 of the scraper, whichedgeis adapted to have alip 2'il remova'bly secured thereto;

Inner side walls 22 are disposedin spaced relation to the outer walls 1 6 on each side of the scraper body, as best shown in Figures 2; 5 and 6. These walls extend outwardly from the rear wall l4 having their upper edges 24 aligned with the upper edges '26 of the outer walls T6. The leading edges 28 of the inner walls 22' curve downwardly and terminate at the base 12' of the body, substantially at the point where the base begins to curve upwardly to form the rear wall 14".

As best shown-in Figures 2, 3, and 6, the arms 39 and 32 of the alignment yoke member 34 are pivotally secured between the inner walls 22 and the outer walls 16 on each side of the scraper body. Since this construction is the same on each side of the body, only one arm and its associated parts will be described here: Telescoping'pin members 3'6=and 38 are adapted to be inserted in the openings 40 and 42' provided in the inner wall 2-2 and the outer wall 16-, respectively, andthrough the opening: 43 in the collar portion 4'5 at the inner end of the arm 30;. The two: telescoping members 36 and 38 are adapted to be held in place by a suitable belt or pin 44 having a nut 46- threadedl-y received on the inner end thereof. Each of the telescoping portions 36 and 38 is provided with suitable shoulder portions 48" and 5%? which in turn cooperate with the shoulders 52 and 54 provided inthe inner wall 22 and the outer wall 10, respectively. The collar portion 45 of the arm 30 may be in the form of a collar and the opening 43 therein may be provided with a bearing surface 56 of suitable metal through which the telescoping members 36 and 38 are adapted to extend.

The arm "30- preferably has an l-beam construction and a stop element 58 is provided thereon adjacent the collar portion 45, which stop element has a curved outer edge 60 conforming closely to the configuration of the base 62 of the double walled portions of the body. The stop element 58 is provided with an abutment surface 64 which is adapted to abut the stop member 66 extending between the inner wall 22 and the outer wall 16 below the point of pivotal attachment of the two arms 30 and 32 An opening 68 is provided in the base of the stop element 66 to permit any material which may collect between the stop member 66 and the abutment surface 64 to pass out of that area into the scraper, when the scraper body is moved into the fully open position with respect to the alignment yoke 34. The stop member 66, of course, serves as a means for limiting the movement of the arm 30 of the scraper relative to the body thereof. The surface 64 is shown in abutment with the stop member 66 in Figure 1 when the scraper is in the fully open position.

This form of construction serves to house the inner ends of the arms 30 and 32 of the yoke so that they are not subjected to excessive wear as are the conventional form of arms which are pivotally mounted to the main body of the scraper on the outer surface of the rear wall. The cooperative relation of the stop element 58, the rear wall 14 and the two side walls '16 and 22 is such that foreign material is kept from entering into association with the pivotal members from above. In addition, as previously indicated, means in the form of the opening 68 is also provided for permitting any material which may possibly enter into the area between the stop element 58 and the stop member 66 to be ejected therefrom when the scraper is opened. This construction not only provides a distinct advantage from the functional standpoint but it also gives the scraper. a very attractive appearance. 7

As best shown in Figures 3, 4 and '5, the manner in which the lip 20 is attached to the base 12 of the body of the scraper enables it to have a double wall construction at intervals across the outer surface thereof, as best shown in Figure 4. This form of construction provides for increased rigidity in the body structure and also enables the runners 70, 72 and 74 to be formed on which the scraper may ride when in the folded position. The two outer runners 70 and 74 may extend upwardly around the circular rear wall M to the upper edge of that rear wall, as best shown in Figure 3. The center runner 72 on the other hand preferably terminates in thecoupling 76, which provides for the pivotal attachment of the forward and rear drawlines thereto. As best shown in Figure 4, the two outer runners 70 and 74 are preferably coincident with the base of the inner wall 22 and the outer wall 16, and the base 62 of the opening, in which the abutment element 58 is adapted to move, is the body of these runners 70 and 74, the base being preferably disposed slightly below the rear wall 14 of the body of the scraper. This relative position of the rear wall '14 to the base 62 is also illustrated in Figures 1, 2 and The portions of the runners 70, 72 and 74, which are co-extensive with the base or door 12 of the scraper body themselves, have a double wall construction, as best shown in Figure 5. Here again only one such portion will be described in detail since the other two are identical. An opening 78 is preferably formed in each runner between the double walls, which opening is adapted to receive a tongue member 80 projecting rearwalrdly from the lip 20. The upper wall "82 of this double walled portion is considerably shorter than the lower Wall 84 and the projecting end 86 of the tongue 80 is offset downwardly and adapted to be inserted into the opening 78. The lip '20 is also provided with a groove '88 into which the tapered forward end 90 of the lower wall '84 is adapted to be received when the offset portion 86 of the tongue 80 is inserted in the opening 7-8. After the tongue 80 and the tapered end 90 has been so inserted, the wedge 92 may be driven between the shoulder $4 on the inner side of the offset portion 86 and the shoulder 96 onthe inner edge of the tapered end of the bottom wall 84, as best shown in Figure 4. As the wedge 92 is driven into abutting relation with these two shoulders 94 and 96, it tends to force the tongue 80 into closer association with the bottom of the scraper body and to very securely attach lip 20 thereto.

After the wedge 92 is seated, a bolt 98 may be inserted through the opening '100 in the arm 80, which bolt is threadedly received by a nut 102 inserted in the countersunk opening 104 provided in the wall 84. This serves to maintain the wedge 92 in the position shown in Figure 4, but enables it to be readily removed when it is desired to provide the scraper with a new lip 20.

Each of the runners 70, 72 and 74 has the same construction as just described, and an arm 80 on the lip 20 is cooperatively secured within a similar opening 18 in each such runner.

The coupling 76 may be in the form of two upstanding flanges 106 and 108 having a bore 110 extending through both said flanges adjacent the end which is in closely spaced relation to the upper edge of the rear wall 14. The bore 110 is adapted to receive a pin 112, as best shown in Figures 7 and 8, which pin may be secured by the bolt i114 which is adapted to pass through the openin-g 116 in one end of the pin 112 and thence through the bore 118 in the boss 120 on the rear wall 14 of the scraper body. The inner surface of the rear wall 14 is provided with a countersunk opening i122 adapted to receive a nut 124 which in turn may be threadedly received by the end of the bolt 114. By this arrangement an arm 126 can be pivotally secured to the coupling 76 as best shown in Figure 3, the outer end of the arm 126 being adapted to have one end of forward drawline 128 secured thereto.

The forward end of the bifurcated alignment yoke 34 is provided with a collar or ferrule 130 through which the forward drawline 128 is adapted to freely pass. This arrangement maintains the entire scraper in proper alignment and also permits the necessary pulling force to be applied toopen the scraper and to move it in a forward direction. Theforward end ofv the alignment yoke 34 may also be provided with a suitable wear-shoe 131 since in the fully closed position that end of the yoke may come into contact with abrasive materials.

A suitable arm member T32 may be pivotally secured to a pin 134 similarly mounted in the coupling 76, as best shown in Figure 3, and a rear drawline 136 secured thereto in just exactly the same fashion. The bore 138 in which the pin 134 is seated, as best shown in Figure 5, is disposed inspaced relation to the bore 110, and the pin .134 is adapted to be secured by a suitable bolt in substantially the same fashion as was described for the pin 112.

The arm 126 is so formed and so disposed, as best shown in Figures 1 and 3, that it is adapted to bear against the upper edge of the rear wall 14 when a forward pull is applied to the forward drawline 128, whereas the arm 132 to which the rear drawline is attached is adapted to pivot freely. This disposition of the two arms 126 and 132 provides for the power opening of the scraper, when desired. When a forward pull is applied to the scraper, in the position shown in Figure 2, as represented therein by the arrow 140, and a rearward pull is simultaneously applied by the rear drawline, as represented in Figure 2 by the arrow 142, a couple is formed around the center of the pin 134, with the ultimate result that the two drawlines tend to move into the same plane. This in turn causes the main body of the scraper to pivot about the ends of the arms 30 and 32 so that the scraper gradually assumes the open position shown in Figure 1.

The release of the pull on the forward pull line 128 will, of course, cause the scraper to resume the folded position shown in Figure 2, and a pull applied to the backward pull line 136 will then cause the scraper to move in a. backward direction on the runners 70, 72 and 74.

eyesore In the drawing and specification, there has been set forth a preferred embodiment of the invention, and al though specific terms are employed, they are used in a generic and descriptive sense only and not for purposes of limitation. Changes in form andin the proportion of parts, as well as the substitution of equivalents are contemplated, as circumstances may suggest or render: expedient, without departing fromthe spirit or scope of this invention as further defined in the following claims.

What is claimed is:

1. A folding slushing scraper comprising a scraper body having aback and generally in the form of a scoop, a plurality of elongated double Walled portions in the base of said body forming runners on the bottom surface thereof, webs within said scraper body adjacent the upper trailing edge thereof each formed as an extension forward of said back, gusset-like sides on said scraper body, a bifurcated alignment yoke having the outer ends of the two arms thereof pivotally secured to said body between one of said sides and said webs, a stop member disposed between each of said webs and side for preserving an acute angular relation between said alignment yoke and the bottom of saidscraper body, said outer ends of said yoke having a configuration such that they substantially fill the space between said sides and said webs above said stop member, means for securing a forward pull line to said scraper adjacent the upper trailing edge of said scraper body on the outer surface thereof, a sleeve on the forward end of said alignment yoke adapted to slidably engage such forward pull line, and means for securing a backward pull line to the outer surface of said scraper body below the point of attachment for said forward pull line.

2. A folding slushing scraper comprising a scraper body having a back and generally in the form of a scoop, a plurality of elongated double walled portions in the base of said body forming runners on the bottom surface thereof, a detachable lip on the leading edge of said scraper body, a plurality of tongues on said lip adapted to be received in removable, secured relation within said runners, webs within said scraper body adjacent the upper trailing edge thereof each formed as an extension forward of said back, gusset-like sides on said scraper body, a bifurcated alignment yoke having the outer ends of the two arms thereof pivotally secured to said body between one of said sides and said webs, a stop member disposed between each of said webs and side for preserving an acute angular relation between said alignment yoke and the bottom of said scraper body, said outer ends of said yoke having a configuration such that they substantially fill the space between said sides and said webs above said stop member, means for securing a forward pull line to said scraper adjacent the upper trailing edge of said scraper body on the outer surface thereof, a sleeve on the forward end of said alignment yoke adapted to slidably engage such forward pull line, and means for securing a backward pull line to the outer surface of said scraper body below the point of attachment for said forward pull line.

3. In a foldable slushing scraper having a scraper body having a back and generally in the form of a scoop and a bifurcated alignment yoke having the outer ends of the two arms thereof pivotally secured within said scraper body at each side thereof, the combination comprising a plurality of elongated double walled portions in the base of said body forming runners on the bottom surface thereof, webs within said scraper body adjacent the upper trailing edge thereof each formed as an extension forward of said back, gusset-like sides on said scraper body, and a stop member disposed between each of said webs and side for preserving an acute angular relation between said alignment yoke and the bottom of said scraper body, said outer ends of said yoke being pivotally disposed between each said web and side and having a configuration such that they substantially fill" the space between said sides and said webs above said stop member.

' 4; Ina foldable slushing scraper having a scraper body having a back and generally in the form of a scoop and a bifurcated alignment yoke having the outer ends of the two arms thereof pivotally secured within said scraper body at each side thereof, the combination comprising a plurality of elongated double walled portions in the base of said body forming runners on the bottom surface thereof, webswithin said scraper body adjacent the upper trailing edge thereof eachformed as an extension forward of said back, gusset-like sides on said scraper body, a stop member disposed between eachof said webs and side for preserving an acute angular relation between saidalignment yoke andthe' bottom of saidscraper body, said outer ends of said yoke being pivotally disposed be-' tweeneach said web and side' and having a configuration such that they substantially fill the space between said sides and said webs-above said stop member, a detachable lip onthe'l'eadin'g edge of said scraper body, and a plurality of tongues on said lip" adaptedto be received in removable, s'e'eured relation Within said runners.

5 A foldable slushing scraper comprising, when in unfolded or open position, a scraper body generally in the form of a scoop having a lip at the lower scraping end thereof, gusset-like sides on said scraper body, webs within said scraper body adjacent the upper trailing edge thereof and disposed in spaced parallel relation to each of said sides, a bifurcated alignment yoke having the outer ends of the two arms thereof pivotally secured to said body between one of said sides and said webs, means for securing a forward pull line to said scraper adjacent the upper trailing edge of said sraper body on the outer surface thereof, a collar on the forward end of said hifurcated alignment yoke adapted to slidably engage such forward pull line, means for securing a backward pull line to the outer surface of said scraper body below the point of attachment for said forward pull line, and a first stop member within said scraper body, which is below the point of pivotal attachment of said arms to said body when the scraper is folded and which is adapted to abut a second stop member attached to said arms limiting the pivotal movement of said yoke away from the leading edge of said scraper body when the scraper is unfolded.

6. A foldable slushing scraper comprising, when in unfolded or open position, a scraper body generally in the form of a scoop having a lip at the lower scraping end thereof, at least a portion of the sides of said body being of a double walled construction, a bifurcated alignment yoke having the outer ends of the two arms thereof pivotally secured to said scraper body within the two walls of the doubled walled portions of said body, a first stop member disposed between said two walls of each side, said stop member being below the point of pivotal attachment of said arms to said scraper body when the scraper is folded and adapted to abut a second stop member attached to said arms for preserving an acute angular relation between said alignment yoke and the bottom of said scraper body when the scraper is unfolded, means for securing a forward pull line to said scraper adjacent the upper trailing edge of said scraper body on the outer surface thereof, a collar on the forward end of said bifurcated alignment yoke adapted to slidably engage such forward pull line, and means for securing a backward pull line to the outer surface of said scraper body below the point of attachment for said forward pull line.

7. A foldable slushing scraper comprising, when in unfolded or open position, a scraper body generally in the form of a scoop having a lip at the lower scraping end, at least a portion of the sides of said body being of a double walled construction, a bifurcated alignment yoke having the outer ends of the two arms thereof pivotally secured to said scraper body within the two walls of the doubled walled portions of said body, a first stop member disposed between said walls and which is below the point of pivotal attachment of said arms to said scraper body when the scraper is folded and which is adapted to abut a second stop member attached to said arms for preserving an acute angular relation between said alignment yoke and the bottom of said scraper body when the scraper is unfolded, means for securing a forward pull line to said scraper adjacent the upper trailing edge of said scraper body on the outer surface thereof, a collar on the forward end of said bifurcated alignment yoke adapted to slidably engage such forward pull line, and means for securing a backward pull line to the outer surface of said scraper body below the point of attachment for said forward pull line. 7

8. A foldable slushing scraper comprising, when in unfolded or open position, a scraper body having a base and an open front end, sides secured to said base, webs within said scraper body adjacent the upper trailing edge thereof and disposed in spaced parallel relation to each of said sides, a bifurcated alignment yoke having the outer 20 ends of the two arms theerof pivotally secured to said body between one of said sides and said webs, a first stop member disposed between each of said webs and side and which is below the point of pivotal attachmentof said arms to said body when the scraper is foldedand which is adapted to abut a second stop member attached to said arms for preserving an acute angular relation between said alignment yoke and the bottom of said scraper body when the vscraper is unfolded, said outer ends of said yoke having a configuration such that they substantially fill the space between said sides and said webs above said stop member, means for securing a forward pull line to said scraper adjacent the upper trailing edge of said scraper body in the outer surface thereof, a sleeve on the forward end of said alignment yoke adapted to slidably engage such forward pull line, and means for securing a backward pull line to the outer surface of said scraper body below the point of attachment for said forward pull line.

References Cited in the file of this patent UNITED STATES PATENTS 686,203 Campbell Nov. 5, 1901 2,482,320 Clernmer Sept. 20, 1949 2,634,521 Henderson et al Apr. 14, 1953

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