US1915561A - Traction device - Google Patents

Description

June 27, 1933. R. L. VAN DERVEER 1,915,561

TRACTION DEVICE Filed Aug. 31, 1931 flbvsurore M W Patented June 27, 1933 PATENT OFFICE RALPH L. VAN DERVEER, OF GENEVA, NEW YORK TRACTION DEVICE Application filed August 31, 1931. Serial No. 560,404.

.This invention relates to a new and improved traction device.

The main object of my invention is to provide a traction device for tractors and other vehicles which will be not only eilicient inuse,

but which is so constructed that the wearing parts of the device may be replaced without removing the main body thereof from the felly of a wheel.

Another object of my invention is to provide a traction device of such a design that it may be used on hard roads without danger of injury to the road. y

Another object is to provide a traction device of such a design that difierent sizes and shapes of traction blades may be usedcdepending upon the terrain on which the vehicle is used. p

Other objects and advantages relate to the size, shape and arrangement of parts, all as will more fully appear fromthefollowing description taken in connection with the accompanying drawing, in which s Figure l'is an elevation, partially broken away andpartially in section, showing my improved traction device in position on the felly of a wheel.

Figure 2 is a sectionon line 22 of Figure 1. 7 V

Figure 3 is a section on line 33 of Figure 1. I

Figure 4 is a perspective view of a wearing block used on the traction device. Figure 5 is a perspective view of a wearing blade used on the lug Figure 6 is a perspective view of a frame and traction members used in a modified form of my traction device.

- Figure 7 is a section on line 77 of Figure 6. I

My improved traction device comprises a main shoe 1 formed from a channel iron and having a central aperture as a. In each of the vertical side portions or flanges of the h shoe 1, I provide. a central aperture.

A wearing blade 2 having a central aperture 8 is placed in position against the inner face of each of the vertical sides of the shoe with the aperture 3 in registration with the aperture in such side.

A wearing block 4: having a square recess as b in communication with a U-shaped recess -c, is placed in position against each of the wearing blades 2 with the recess --c in registration with the aperture 3.

Bolts 5 are inserted through the apertures 1n the sides of the shoe 1 and through the apertures 3 in the wearing blades and the recesses c in the wearing blocks 4, and are threaded into nuts 6 which are positioned 1n the recesses -b. and which are held from turning by the wallsof such recesses b.

The wearing blades 2 are preferably of the same length as the sides of the shoe 1, although they may be shorter or longer as occasion may demand.

The wearing blades 2 are higher than the sides of the shoe 1 so that the wear will be taken by them and not by the shoe 1.

Referring to Figure 1, it will be noted that the inner faces of the sides ofcthe shoe 1 are tapered inwardly so that when the wearing blades 2 are in position they'will be in angular relation to the base of shoe 1 with 7 the result that the end of the wearing blades 2 will contact with the ground at an angle which will cause them to cut into the ground more effectually than if they were ina vertical position. 80

It will also be appreciated that when the edges of the wearing plates 2 wear down to a sufficient degree to loose their angular biting effect, it is merely necessary to remove such wearing blades and reverse them end to end, and they will again present a sharp edge to the ground.

With this construction, the wearing blades 2 are self-sharpening.

For the purposeof securing the shoe 1 to the felly of a wheel, I provide a center block the shoe 1, it issecurely fastened to the wheel felly 11 as by bolts 12.

The main body 8 of the center block 7 is sufiiciently long to permit considerable play between the shoe 1 and the telly 11 so that as the wheel revolves, the shoe 1 is permitted to rock on'the telly-11. T

When the device is in use, there will be friction between the ends of the aperture a and the center block 7, which will tend to enlarge the aperture --abut after a certain amount of wear has taken place, the center block 7 will contact with the opposed wearing blocks 4 so that they will limit the movement of shoe 1 on the center block 7.

When and if thewearing blocks 4 are Worn down a suflicient amount so that there is too much play of theshoe 1 on the center block 7, the worn wearing blocks 4 may be removed and new ones placed in the device.

'It will also be apparent that when the wearing blades 2 are-worn downto a point where they lose any considerable degree of effectiveness, they may also replaced by new ones.

Under certainconditions, I prefer to equip my device with wearing blades having a certain degree ofresiliency and to effect this result, I provide a frame 13 having a central aperture d'and' with apertures 14 and 15 in opposite ends of the frame.

In the opposite ends of the-frame 13, I provide parallel clincher slots 16 and 17 in which are removablypositioned traction members 18 and-19 formed of a material, such asrubber, of some degree of resiliency.

1 ,:The traction members 18 and 19 are remov- 19 carry opposed flanges which'snuglyfitthe clincher slots 1.6,and 17. a

- When it is desired to use theframe 13 in my device, the wearing blades 2.are removed andtheframe 13 is .placed'in position on the shoe 1 with the apertures 14 and 15 in registration with theapertures in'the If and when the tractionmembers 18 and claims.

19 are worn away so that they lose a conbe removed from frame 13 and new ones inserted therein.

It will beunderstood that the length, n

height, and thickness of the wearing blades may be varied as desired" to meet varying conditions of use, as may the traction members 18 and 19. 7 It will also be understood that the size and shape of the shoe may be varied as may be the size, and shape of the wearing blocks, for'although I have shown and described a specific structure and form and relation of parts as anexemplification of an embodiment of my invention, I do not'desire to restrict myself to the exact size, shape or relation of parts, as various changes may be made within the scope, of the appended -Iclaim:' w

:1. In a traction device,';a"n apertured shoe having a pair of opposed flanges,'holding means extending through the: aperture of said shoefor securing the shoe to the :felly of a wheel to permit rocking of the shoe on said felly, a pair of'wearing blades, means for removably securing a bladeto eachflange whereby the blade will extend beyond the s face of said flange and including a wearing block, said block having one edge positioned adjacent the'aperture to reinforce theshoe and adapted to contact with the holding means during the rocking of the shoe for preventing wearing-of the shoe at said aperture by the holding means.

2. In a traction device, an apertured shoe having a pair of opposed flanges, means extendingthrough the aperture of said shoe. for securing the shoe to the felly of a wheel to permit rocking of the shoe on saidfelly, a wearing blade adjacent the inner face of each flange, a wearing block adjacent each my hand this day of August, 1931. V

RALPH L. VAN DERVEER.

'siderable degree of their efiiciency, they may 7

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