CA1178987A - Anti-skid device for motor vehicles - Google Patents
Anti-skid device for motor vehiclesInfo
- Publication number
- CA1178987A CA1178987A CA000428251A CA428251A CA1178987A CA 1178987 A CA1178987 A CA 1178987A CA 000428251 A CA000428251 A CA 000428251A CA 428251 A CA428251 A CA 428251A CA 1178987 A CA1178987 A CA 1178987A
- Authority
- CA
- Canada
- Prior art keywords
- frame
- legs
- frames
- ground
- size
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired
Links
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60B—VEHICLE WHEELS; CASTORS; AXLES FOR WHEELS OR CASTORS; INCREASING WHEEL ADHESION
- B60B39/00—Increasing wheel adhesion
- B60B39/02—Vehicle fittings for scattering or dispensing material in front of its wheels
- B60B39/12—Vehicle fittings for scattering or dispensing material in front of its wheels the material being sheet-like or web-like
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Tires In General (AREA)
Abstract
ABSTRACT OF THE DISCLOURE
A series of U-shaped frames have their web and legs of progressively greater length. A smaller-size frame fits between and is pivoted to the free ends of the legs of the next larger-size frame. When the device is extended. each frame projects outwardly from an adjacent frame. In folded position. each frame nests within the next larger frame. At least some of the frames have ground-engaging teeth and the smaller-size frame has tire-engaging teeth.
A series of U-shaped frames have their web and legs of progressively greater length. A smaller-size frame fits between and is pivoted to the free ends of the legs of the next larger-size frame. When the device is extended. each frame projects outwardly from an adjacent frame. In folded position. each frame nests within the next larger frame. At least some of the frames have ground-engaging teeth and the smaller-size frame has tire-engaging teeth.
Description
~-` 1178987 FIELD OF THE INVENTION
.. . . . . .:, The pre~ent lnvention relates to an improved foldable anti-skid devlce for use under the tire~ of motor vehiclee.
BACKGROUND OF THE INVENTION ~-. . ~, Antl-skid devices of rigld unitary constructlon are well known and they are deslgned to be placed on the ground ad;acent and under the stuck vehlcle drive wheel to provide a tractive surface for the wheel. Such devices are normally q carried in the vehicle trunk of the motor vehicle when not in use to be readily available whenever the vehicle 18 stuck.
They require relatively large storage space. Moreover, they can damage other ob~ects or persons, since they have exposed polnted teeth and are liable to be thrown out by the rotat-ing wheel.
Canadlan Patent 1,135,297 dated November 9, 19c2, ln the name of Rlchard Mathion and Jean-Paul Nor~sndeau, `~
und entltled: ~'FOLDABLE TRACTION MAT FOR MOTOR VEHICLES", propd~es an anti-skld devlce whlch can be folded when not ln use to take a mlnlmum storage ~pace. Thls devlce -~
consists of a plurallty of twlsted bar~ pivoted to one another in a lazy tongue srrangement. This device is expensive to manufacture and hss unsufflclent traction, especially on ice, slnce it tends to fold up under the wheel. This devlce also often breaks under the welght of the vehicle when bridglng a ground dspresslon.
OBJECTS OF THE INVENTION
It 18 therefore the maln ob~ect of the pre~ent lnvention to provide a fol~able Antl-skld device whlch is of very simple and inexpensive constructlon, which takes a minimum of room when folded, which provides efficient tractlon, since it fit~ the ground contour, and yet will not cause in~ury to persons or damage adjacent ob~ects when used under the car and or handled in a storage place, and will not dama8e the tire of the driving wheel.
Another ob~ect of the invention 18 to provide ~
device of thé character described, which can be made from a minimum of material and whichresists breakage in use. ~-SUMMARY OF THE INVENTION
--- The anti-skld device of the present invention comprises a series of ~-shape frames, each having a pair of legs interconnected by a transverse web, the webs and legs of successive frames_having progre~sively 8reater lengths. A smaller-size frame fits between and i~ pivoted to the free ends of the legs of the next larger-~ize frame, such that the frame can be folded from an extended oper~tive posltlon to a non-operatlve posltlon, whereln e~ch frame nests wlthln the next larger-size frame. At lea~t one of the frames have ground-engaging teeth and one of the end frames has tire-engaglng teeth.
Preferably, the tire-engsglng teeth are dlsposed along the centerllne of the extended devlce. Prefer~bly, only each ~lternate frame 18 provlded with ground-engaging teeth. Preferably, each U-sh~ped frame 18 made of flat b~r steel stock wlth the legs bent at rlght angleH
to the web and the ground-engnging teeth are formed along a narrow ed8e of the frame and co-extenslve wlth both legs and web.
BRIEF DESCRIPTION OF THE DRAWINGS
The foregoing wlll become clearer by referring to the drawings, in which:
Figure 1 is a perspective view of the anti-skid device shown in operative extended position on the ground, with the tire-engaglng teeth about to engage underneath the tire tread of a driving wheel of a motor 11'78987 vehicle;
Figure 2 is a perspective view of the device ln partlally-folded position;
Figure 3 is a top plan view of the device ln a fully-extended positlon;
Figure 4 i8 a perspective view of the device in fully-folded position; and Figure 5 LY a cross-section taken along line 5-5 of Figure 3.
The anti-~kid device of the present lnventlon is generally shown at 1 and is designed to be laid on snow t or ice-covered ground forwardly of and in engagement with the tread of tire A of the driving wheel of a motor vehicle ~, 80 that the driving wheel which 18 stuck because in a rut or on a slippery surface, will roll over the device 1 which provide0 sufficient traction.
The device 1 is made of a series, for instance, flve, U-shaped frames of progressively-increasing sizes, namely:
20 frames lO to 14. Each frame is made of flat bar metal-stock, ;`
preferably stetl, bent to form a U-shape defininæ a web member 15 and two str~ight legs 16 at approx1~tely ri8ht angles to the web 15 and of equal length. The webs and legs of successlve frames of the series have progressively greater lengths. Therefore, a smaller-size frame fits between the legs of the next larger-size frame. All of the frames 10 to 14 are pivoted one to another. More partIcularly,the portion of the legs 16 of the smallest-size frame 10, ad~acant its web 15, is pivoted to the free ends of legs 16 of the 30 next larger-size frame 11 by mesns of riveted pivot plns ~7 for pivotal mvoement of the two frames about an axis trens-verse to the device 1 and generally parallel to the W~8 15 of all the frames. The successive frame0 are analogously pivoted to the next larger frame. Each frame can ,. .. ...
~ _ 4 -be pivoted with respect to the next larger frame through 8 complete turn.
From the foregoing, it i8 clear that the device 1 can be fully extended to an operative position, a~ shown in Figures 1 and 3, in which each frame projects outwardly from an adjacent frame and a folded inoperative position ready for storage in which each frame nests within the next larger-size frame, with all the frames in co-planar relationship, as clearly shown in Figure 4. In the folded position, the devlce 1 makes a compact and neat bundle, which can be conveniently stored in minimum space. The flat bar stock constituting each frame is cimply bent, a8 previousIy described, to form the side legs 16 and is not twlsted in any way. Each frame is adapted to lie f~at on the ground with a narrow edge of the flat bar stock in co~tact with the ground. This narrow edge is formed with a series of ground-engaglng teeth 18, at least for each alternate frame.
In the example shown, there is an odd number of frames and the two end frames 10 and 14, a~ well as frame 12, are provided with such ground-engaging teeth 18. E~ch tooth is integral with the frame, belng m~de by a die-cut operation to form teeth extending along substantially the complete length of legs 16 and web 15. Each tooth 18 has an apex angle of about 90. ~ecause they extend over the entire length of the frame, the teeth provlde very efflclene tractlon on lce or ~llppery snow.
It has been found unnecessary to provide ground-engaging teeth 18 on all of the frames. This i8 due to the fact that. when the tire A rests on a web lS. devoid of ground-engaging teeth 18. the pre~sure is transmitted through the pivot pins 17 -to the legs 16 of the next larger-size frame. which i8 it~elf provided with ground-engaging teeth 18.
Thus. sufficient traction is obtained for any position of t~he tire wheel on the device 1. Due to the pivotal connections between the frames. very efficient traction i9 obtained. even if the ground is not flat but contoured. since each frame pivots to lie flat on the grou~d.
Preferably. each frame provided wlth ground-engaging teeth 18. is formed as follows:
A flat bar ~tock. of twice the width of the U-shape frame and of the required length. i9 die cut along its longitudinal centerline to form inter-dlgitated teeth 18 for two similar frames. Then these two frames are bent to form the web 15 and rlght angular legs 16. each adapted to form one frame of one device 1. Thus. a saving of steel material is obtained.
; The smallest-size U-shape frame 10 is further provided at the free ends of its legs 16 with lnturned extensions 19. which practically touch each other at their free ends located along the longi-tudinal centerline of the device 1. these free ends being twisted and shaped to form tire-engaging teeth 20 whichare directed opposite to the ground-engaging teeth 18 and 18 of this frame ]0. Furthermore. the teeth 18' of legs 16 of frame 10 do not extend the full length of these legs. but only along the portion adjacent the web 15. In the embodiment shown there are two 11~8987 such teeth 18' on each leg 16 of frame 10 wlth the tooth further away from p~vot 17, bein8 of slightly smaller height. With this arrangement, the outer portlon of the frame lO is of minimum thickness for maximum insertion underneath the tire A for proper engag~ment of the teeth 20 with the tire tread, YO that immedlately upon start of rotation of the tire ~, the latter will move over the device 1.
The free ends of the two exten~ions 19 of frame 10 can be welded to each other, but thlu has not been found necessary.
Because the two teeth 20 are centrally located, non-slmultaneous engagement of these teeth by the tlre A wlll not result ln the lateral shlftlng and mlsallgnment of the devlce A wlth re0pect to the dlrectlon of movement of the tire A~ contrary to what could happen lf the~e teeth 20 were spaced apart transversely of the frame 10.
Preeerably, the devlce is folded in accordeon-llke faffhlon, as shown ln Figure 2, 80 that all the ground-engaging teeth will face ln the same dlrectlon when the devlcs is folded and unfolded position. The tire-engaglng teeth 20 (see Flg. 4) lle at a lower level than the other frames.
....
A palr of ffuch folded devices or unit~ can be stored wlth the ground-engaging teeth of each unlt faclng the teeth of the other unlt, one unit up~lde down with the ground-engaging teeth faclng upward and the other unit with the ground-engaging teeth facing downward, and the transverse teeth of both unlts interdlgitated. The ground-engaglng teeth on both sldes of one unlt, namely: on frames 14, 12, and 10, will engage into the space formed by the side legs 16 of frames 13 and 11 with an offset equal to the thlCkness of the U-~hape frames. This stored arrangement of botb ., ~,t~.... .
98~
units provides a Ymaotb surface all around the folded pair, which will not cause damage to fabric or any other material which might rest o`n top or underneath the folded pair. Also, the overall thickness i8 reduced.
'~ ~ . ~9
.. . . . . .:, The pre~ent lnvention relates to an improved foldable anti-skid devlce for use under the tire~ of motor vehiclee.
BACKGROUND OF THE INVENTION ~-. . ~, Antl-skid devices of rigld unitary constructlon are well known and they are deslgned to be placed on the ground ad;acent and under the stuck vehlcle drive wheel to provide a tractive surface for the wheel. Such devices are normally q carried in the vehicle trunk of the motor vehicle when not in use to be readily available whenever the vehicle 18 stuck.
They require relatively large storage space. Moreover, they can damage other ob~ects or persons, since they have exposed polnted teeth and are liable to be thrown out by the rotat-ing wheel.
Canadlan Patent 1,135,297 dated November 9, 19c2, ln the name of Rlchard Mathion and Jean-Paul Nor~sndeau, `~
und entltled: ~'FOLDABLE TRACTION MAT FOR MOTOR VEHICLES", propd~es an anti-skld devlce whlch can be folded when not ln use to take a mlnlmum storage ~pace. Thls devlce -~
consists of a plurallty of twlsted bar~ pivoted to one another in a lazy tongue srrangement. This device is expensive to manufacture and hss unsufflclent traction, especially on ice, slnce it tends to fold up under the wheel. This devlce also often breaks under the welght of the vehicle when bridglng a ground dspresslon.
OBJECTS OF THE INVENTION
It 18 therefore the maln ob~ect of the pre~ent lnvention to provide a fol~able Antl-skld device whlch is of very simple and inexpensive constructlon, which takes a minimum of room when folded, which provides efficient tractlon, since it fit~ the ground contour, and yet will not cause in~ury to persons or damage adjacent ob~ects when used under the car and or handled in a storage place, and will not dama8e the tire of the driving wheel.
Another ob~ect of the invention 18 to provide ~
device of thé character described, which can be made from a minimum of material and whichresists breakage in use. ~-SUMMARY OF THE INVENTION
--- The anti-skld device of the present invention comprises a series of ~-shape frames, each having a pair of legs interconnected by a transverse web, the webs and legs of successive frames_having progre~sively 8reater lengths. A smaller-size frame fits between and i~ pivoted to the free ends of the legs of the next larger-~ize frame, such that the frame can be folded from an extended oper~tive posltlon to a non-operatlve posltlon, whereln e~ch frame nests wlthln the next larger-size frame. At lea~t one of the frames have ground-engaging teeth and one of the end frames has tire-engaglng teeth.
Preferably, the tire-engsglng teeth are dlsposed along the centerllne of the extended devlce. Prefer~bly, only each ~lternate frame 18 provlded with ground-engaging teeth. Preferably, each U-sh~ped frame 18 made of flat b~r steel stock wlth the legs bent at rlght angleH
to the web and the ground-engnging teeth are formed along a narrow ed8e of the frame and co-extenslve wlth both legs and web.
BRIEF DESCRIPTION OF THE DRAWINGS
The foregoing wlll become clearer by referring to the drawings, in which:
Figure 1 is a perspective view of the anti-skid device shown in operative extended position on the ground, with the tire-engaglng teeth about to engage underneath the tire tread of a driving wheel of a motor 11'78987 vehicle;
Figure 2 is a perspective view of the device ln partlally-folded position;
Figure 3 is a top plan view of the device ln a fully-extended positlon;
Figure 4 i8 a perspective view of the device in fully-folded position; and Figure 5 LY a cross-section taken along line 5-5 of Figure 3.
The anti-~kid device of the present lnventlon is generally shown at 1 and is designed to be laid on snow t or ice-covered ground forwardly of and in engagement with the tread of tire A of the driving wheel of a motor vehicle ~, 80 that the driving wheel which 18 stuck because in a rut or on a slippery surface, will roll over the device 1 which provide0 sufficient traction.
The device 1 is made of a series, for instance, flve, U-shaped frames of progressively-increasing sizes, namely:
20 frames lO to 14. Each frame is made of flat bar metal-stock, ;`
preferably stetl, bent to form a U-shape defininæ a web member 15 and two str~ight legs 16 at approx1~tely ri8ht angles to the web 15 and of equal length. The webs and legs of successlve frames of the series have progressively greater lengths. Therefore, a smaller-size frame fits between the legs of the next larger-size frame. All of the frames 10 to 14 are pivoted one to another. More partIcularly,the portion of the legs 16 of the smallest-size frame 10, ad~acant its web 15, is pivoted to the free ends of legs 16 of the 30 next larger-size frame 11 by mesns of riveted pivot plns ~7 for pivotal mvoement of the two frames about an axis trens-verse to the device 1 and generally parallel to the W~8 15 of all the frames. The successive frame0 are analogously pivoted to the next larger frame. Each frame can ,. .. ...
~ _ 4 -be pivoted with respect to the next larger frame through 8 complete turn.
From the foregoing, it i8 clear that the device 1 can be fully extended to an operative position, a~ shown in Figures 1 and 3, in which each frame projects outwardly from an adjacent frame and a folded inoperative position ready for storage in which each frame nests within the next larger-size frame, with all the frames in co-planar relationship, as clearly shown in Figure 4. In the folded position, the devlce 1 makes a compact and neat bundle, which can be conveniently stored in minimum space. The flat bar stock constituting each frame is cimply bent, a8 previousIy described, to form the side legs 16 and is not twlsted in any way. Each frame is adapted to lie f~at on the ground with a narrow edge of the flat bar stock in co~tact with the ground. This narrow edge is formed with a series of ground-engaglng teeth 18, at least for each alternate frame.
In the example shown, there is an odd number of frames and the two end frames 10 and 14, a~ well as frame 12, are provided with such ground-engaging teeth 18. E~ch tooth is integral with the frame, belng m~de by a die-cut operation to form teeth extending along substantially the complete length of legs 16 and web 15. Each tooth 18 has an apex angle of about 90. ~ecause they extend over the entire length of the frame, the teeth provlde very efflclene tractlon on lce or ~llppery snow.
It has been found unnecessary to provide ground-engaging teeth 18 on all of the frames. This i8 due to the fact that. when the tire A rests on a web lS. devoid of ground-engaging teeth 18. the pre~sure is transmitted through the pivot pins 17 -to the legs 16 of the next larger-size frame. which i8 it~elf provided with ground-engaging teeth 18.
Thus. sufficient traction is obtained for any position of t~he tire wheel on the device 1. Due to the pivotal connections between the frames. very efficient traction i9 obtained. even if the ground is not flat but contoured. since each frame pivots to lie flat on the grou~d.
Preferably. each frame provided wlth ground-engaging teeth 18. is formed as follows:
A flat bar ~tock. of twice the width of the U-shape frame and of the required length. i9 die cut along its longitudinal centerline to form inter-dlgitated teeth 18 for two similar frames. Then these two frames are bent to form the web 15 and rlght angular legs 16. each adapted to form one frame of one device 1. Thus. a saving of steel material is obtained.
; The smallest-size U-shape frame 10 is further provided at the free ends of its legs 16 with lnturned extensions 19. which practically touch each other at their free ends located along the longi-tudinal centerline of the device 1. these free ends being twisted and shaped to form tire-engaging teeth 20 whichare directed opposite to the ground-engaging teeth 18 and 18 of this frame ]0. Furthermore. the teeth 18' of legs 16 of frame 10 do not extend the full length of these legs. but only along the portion adjacent the web 15. In the embodiment shown there are two 11~8987 such teeth 18' on each leg 16 of frame 10 wlth the tooth further away from p~vot 17, bein8 of slightly smaller height. With this arrangement, the outer portlon of the frame lO is of minimum thickness for maximum insertion underneath the tire A for proper engag~ment of the teeth 20 with the tire tread, YO that immedlately upon start of rotation of the tire ~, the latter will move over the device 1.
The free ends of the two exten~ions 19 of frame 10 can be welded to each other, but thlu has not been found necessary.
Because the two teeth 20 are centrally located, non-slmultaneous engagement of these teeth by the tlre A wlll not result ln the lateral shlftlng and mlsallgnment of the devlce A wlth re0pect to the dlrectlon of movement of the tire A~ contrary to what could happen lf the~e teeth 20 were spaced apart transversely of the frame 10.
Preeerably, the devlce is folded in accordeon-llke faffhlon, as shown ln Figure 2, 80 that all the ground-engaging teeth will face ln the same dlrectlon when the devlcs is folded and unfolded position. The tire-engaglng teeth 20 (see Flg. 4) lle at a lower level than the other frames.
....
A palr of ffuch folded devices or unit~ can be stored wlth the ground-engaging teeth of each unlt faclng the teeth of the other unlt, one unit up~lde down with the ground-engaging teeth faclng upward and the other unit with the ground-engaging teeth facing downward, and the transverse teeth of both unlts interdlgitated. The ground-engaglng teeth on both sldes of one unlt, namely: on frames 14, 12, and 10, will engage into the space formed by the side legs 16 of frames 13 and 11 with an offset equal to the thlCkness of the U-~hape frames. This stored arrangement of botb ., ~,t~.... .
98~
units provides a Ymaotb surface all around the folded pair, which will not cause damage to fabric or any other material which might rest o`n top or underneath the folded pair. Also, the overall thickness i8 reduced.
'~ ~ . ~9
Claims (7)
EXCLUSIVE PROPERTY OR PRIVILEGE IS CLAIMED, ARE
DEFINED AS FOLLOWS:
1. A foldable anti-skid device for use under the tire of a motor vehicle driving wheel, comprising a series of U-shaped frames, each having a pair of legs interconnected by a transverse web, the webs and legs of successive frames of said device having progressively greater lengths, a smaller-size frame fitting between and pivoted to the free ends of the legs of the next larger-size frame for free pivotal movement of all the frames relative to each other about axes substantially parallel to said webs between an extended position of the device in which each frame projects outwardly from an adjacent frame and a folded position of the device wherein each frame nests within the next larger-size frame, with all said frames in substantially co-planar relation, said frames, when said device is in extended position, having a ground-engaging side, ground-engaging teeth formed at said ground-engaging side of at least one of said frames and one of the two end frames of said series having tire-engaging teeth oppositely directed relative to said ground-engaing teeth.
2. A device as defined in claim 1;
wherein each frame is made of flat bar metal stock with said legs bent at substantially right angles to said web, said ground-engaging teeth being integral with their associated frame and formed at a narrow side edge of said flat bar stock.
wherein each frame is made of flat bar metal stock with said legs bent at substantially right angles to said web, said ground-engaging teeth being integral with their associated frame and formed at a narrow side edge of said flat bar stock.
3. A device as defined in claim 2. wherein said ground-engaging teeth extend along the web and legs of their associated frame.
4. A device as defined in claim 1, 2 or 3. wherein each smaller-size frame is pivoted to the next larger-size frame by means of pivot pins extending through the legs of the smaller-size frame adjacent the web of said smaller-size frame and through the outer ends of the legs of the next larger-size frame.
5. A device as defined in claim 3, wherein each smaller-size frame is pivoted to the next larger-size frame by means of pivot pins extending through the legs of the smaller-size frame adjacent the web of said smaller-size frame and through the outer ends of the legs of the next larger-size frame. the free ends of the end frame which is of smallest size being provided with inturned extensions directed towards each other and terminating adjacent each other along the longitudinal centerline of the device said free ends of said extensions being twisted and shaped to each provide a tire-engaging tooth.
6. A device as defined in claim 5. wherein the web and only the portion of the legs of the smaller-ize frame adjacent its web are provided with ground-engaging teeth the outer portion of the legs of said last-named frame being free of said teeth.
7. A device as claimed in claim 1, 2 or 3, wherein there is an odd number of frames and said ground-engaging teeth are provided on said two end frames and on each alternate frame with the remaining frames being devoid of said teeth.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CA000428251A CA1178987A (en) | 1983-05-16 | 1983-05-16 | Anti-skid device for motor vehicles |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CA000428251A CA1178987A (en) | 1983-05-16 | 1983-05-16 | Anti-skid device for motor vehicles |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CA1178987A true CA1178987A (en) | 1984-12-04 |
Family
ID=4125253
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CA000428251A Expired CA1178987A (en) | 1983-05-16 | 1983-05-16 | Anti-skid device for motor vehicles |
Country Status (1)
| Country | Link |
|---|---|
| CA (1) | CA1178987A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO1985005597A1 (en) * | 1984-06-05 | 1985-12-19 | Joreco Oy | An auxiliary device for freeing a vehicle which has been stuck |
| CN113715562A (en) * | 2021-09-07 | 2021-11-30 | 郑州中远防务材料有限公司 | Special vehicle otter board of getting rid of poverty |
-
1983
- 1983-05-16 CA CA000428251A patent/CA1178987A/en not_active Expired
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO1985005597A1 (en) * | 1984-06-05 | 1985-12-19 | Joreco Oy | An auxiliary device for freeing a vehicle which has been stuck |
| CN113715562A (en) * | 2021-09-07 | 2021-11-30 | 郑州中远防务材料有限公司 | Special vehicle otter board of getting rid of poverty |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| MKEC | Expiry (correction) | ||
| MKEX | Expiry |