CA1075515A

CA1075515A - Road scarifier

Info

Publication number: CA1075515A
Application number: CA311,394A
Authority: CA
Inventors: Lucien Cousin
Original assignee: Individual
Current assignee: Individual
Priority date: 1978-09-15
Filing date: 1978-09-15
Publication date: 1980-04-15

Abstract

ABSTRACT OF THE DISCLOSURE
A road scarifier is disclosed. It comprises a frame adapted to be moved back and forth by a tractor coupled to one end of the frame and then to the other, tooth bars mounted on such frame, scarifier teeth pivotally mounted on such tooth bars and having their road-engaging end cut at 90 degrees, and abutment means mounted on the tooth bars for allowing pivotal movement of the teeth back and forth during movement of the frame by an angle such as to permit one corner of the 90-degree cut teeth to engage the road during movement of the scarifier in one direction and the other corner of the teeth to engage the road in the other direction of movement of the scarifier.

Description

This invention relates to road scarifiers used for rendering icy road surfaces less slippery in winter.
Road surfaces in northern countries get very slippery due to the passage of heavy vehicles which compact the snow to an icy condition.
Because of the severe weather conditions, it is not practical, or possible, to melt the ice and the icy surfaces of the roads must be roughened.
The apparatuses used for such operation are called road scarifiers and they are generally made to be pulled by a tractor.
The known road scarifiers have fixed teeth which wear out very rapidly and must be replaced.
It is therefore the object of the present invention to provide a road scarifier which is simple to manufacture and which is pro-vided with teeth which can last much longer.
The road scarifier, in accordance with the invention, com-prises a frame adapted to be moved back and forth by a tractor coupled to one end of the frame and then to the other, tooth bars mounted on such frame~ scarifier teeth pivotally mounted on such tooth bars and having their road-engaging end cut at 90 degrees~ and abutment means mounted ; on the tooth bar for allowing pivotal of the teeth back and forth during movement of the frame by an angle such as to permit one corner of the 90-degree cut teeth to engage the road during movement of the scarifier in one direction and the other corner of the teeth to engage the road ln the other direction of movement of the scarifier.
In a preferred embodiment of the invention, the frame comprises a transverse member and two pairs of converglng members, each connected at one end to the transverse member, and at the other end to a draw bar.
The tooth bars extend from the transverse member to the converging member parallel to the direction of movement of the frame. Gne pair of converging members and its associated bars are pivotally connected to the transverse member to permit the teeth of that section of the scarifier to

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more closely follow the surface of the road.
The invention will now be disclosed, by way of example, with reference to a preferred embodiment, in which:
Figure 1 illustrates a perspective view of a road scarifier in accordance with the invention;
Figure 2 illustrates a front view of the road scarifier illustrated in Figure l; and Figure 3 illustrates a view taken along line 3-3 of Figure 2.
Referring to the drawings, there is shown a road scarifier having a frame consisting of a transverse member 10, a first pair of con-verging members 12 extending from the transverse member 10 and connected to a first draw bar 14, through coupler 15, and a second pair of converg-; ing members 16 extending from the transverse member 10 and connected to a second draw bar 18 through coupler 19. Tooth bars 20 extend longi-tudinally from the transverse member 10 to the converging members 12 and 16. Scarifier teeth 22, of substantial width, are freely pivotally mounted on such tooth bars by means of pins 24. The road-engaging end of teeth . ~.
22 are cut at 90 degrees and~ as shown in Figure 3~ abutment means~ in the form of pins 26, are provided on the tooth bars for allowing a pre-determined pivotal movement of the teeth when the scarifier is pulled in ;~ one direction or the other. This predetermined pivotal movement permits each corner of the 90-degree cut teeth to engage the road during movement of the scarifier in one direction or the other. This feature permits to -double the life of the teeth. Indeed, it will be easily understood that a fixed tooth with a pointed end will become dull twice as fast.
The converging members 16 and the tooth bars 20 associated with that section of .he scarifier frame are pivotally connected to the transverse member by means of pins 28, so as to permit the scarifier teeth to more clearly follow the surface of the road. In addition, pins 28 permit to fold /converging members 16 and converging members 12 during transportation and ~0755~5 stor~ge. Brackets 30 are provided for holdiDg the converg~ng memb~r3 - together.
Safety devico3, in the form of reflecti~ llght~ 32 and flags 34, are also ~ounted OD the framo.
Obviow ly, one dra~ bar can be provided. For instance~
draw bar 14 can be uncoupled from coupler 15 and attached to couplor 19 when it is desired to pull the scarifier in tha opposite direction. The tooth bars 20 of one section of the scaririer are laterally of~set with respect to the tooth bars of the other ~carifier 3ection, so that the traillng taeth will not follow tho traces Or the 10sding teeth.
For the same reason, the testh on the oame tooth bar, e~copt one, are bent to have a laterally cffset lower portion.
~ lthough tho invention has bsen dl~closed ~ith referenca to a prererred o~bodi~ent~ it is to be uDderstood that other la~ernativa~

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aro envi~agad and that tho inv-ntion 1~ to be limited by the scope o~;
~` the olaims onl~. For e~ample, the rra~e may take other conrigurations than th~ one showo in tho dra~ing~, tha a4Jantial resture boing that ths tooth bar~ are provided with ~c rlf~er teeth, ~hlch ~re cut at 90 dogrees and aro pivotable 90 as to per~lt each corner of the toeth to engago the rfAca o~ the ro~ tho ~curiii~ l~ o -d b-ck r~ forth.

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Claims

THE EMBODIMENTS OF THE INVENTION IN WHICH AN EXCLUSIVE
PROPERTY OR PRIVILEGE IS CLAIMED, ARE DEFINED AS FOLLOWS:

1- A road scarifier comprising:
a) a frame adapted to be moved back and forth by a tractor coupled at one end to the frame and then to the other;
b) tooth bars mounted on said frame;
c) scarifier teeth pivotally mounted on said tooth bars and having their road-engaging end cut at 90 degrees; and d) abutment means mounted on said tooth bars for allowing pivotal of said teeth back and forth during movement of said frame by an angle such as to permit one corner of the 90-degree cut teeth to engage the road during movement of the scarifier in one direction and the other corner of said teeth to engage the road during movement of the scarifier in the other direction.

2- A road scarifier as defined in claim 1, wherein said frame is made in several sections pivotally connected together so as to permit said teeth to more clearly follow the surface of the road.

3- A road scarifier as defined in claim 1, further comprising a draw bar connected to said frame at each end for attachment to the tractor at one end or the other.

4- A road scarifier as defined in claim 3, wherein said frame comprises a transverse member and two pairs of converging members, each connected at one end to said transverse member and at the other end to said draw bar.

5- A road scarifier as defined in claim 4, wherein said tooth bars extend from said transverse member to said converging members paralle to the direction of movement of the frame.

6- A scarifier as defined in claim 4, wherein one pair of converging members and their associated tooth bars are pivotally connected to said transverse member to permit the teeth of that section of the scarifier to more closely follow the surface of the road.