CA1083641A - Dual rim for automotive vehicle - Google Patents
Dual rim for automotive vehicleInfo
- Publication number
- CA1083641A CA1083641A CA276,438A CA276438A CA1083641A CA 1083641 A CA1083641 A CA 1083641A CA 276438 A CA276438 A CA 276438A CA 1083641 A CA1083641 A CA 1083641A
- Authority
- CA
- Canada
- Prior art keywords
- rim
- drum
- adjustable
- rim element
- dual
- 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
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- Tires In General (AREA)
Abstract
ABSTRACT OF THE DISCLOSURE
A rim is disclosed for converting a vehicle wheel into a dual wheel. Different sizes of tires may be mounted on the rim, so that the rim may be used in con-nection with different vehicles having different sizes of tires without having to obtain a new dual rim each time there is a change in the vehicle tire size. The dual rim includes a cylindrical drum having a fixed rim element located adjacent to an outer peripheral edge of the drum.
An adjustable rim element is slidably located on the drum for axial movement away from or toward the fixed rim element, thereby accommodating different sizes of tires. A plurality of hoop-like concentric retaining elements are attached to the drum outer surface and are axially spaced from the fixed rim element at predetermined intervals. The adjustable rim element selectively engages one of the retaining elements depending upon the size of the tire used and the adjustable rim element is clamped in position. Chain type releasable fasteners are connected between the drum inner surface and the vehicle wheel to releasably hold the dual rim in position.
A rim is disclosed for converting a vehicle wheel into a dual wheel. Different sizes of tires may be mounted on the rim, so that the rim may be used in con-nection with different vehicles having different sizes of tires without having to obtain a new dual rim each time there is a change in the vehicle tire size. The dual rim includes a cylindrical drum having a fixed rim element located adjacent to an outer peripheral edge of the drum.
An adjustable rim element is slidably located on the drum for axial movement away from or toward the fixed rim element, thereby accommodating different sizes of tires. A plurality of hoop-like concentric retaining elements are attached to the drum outer surface and are axially spaced from the fixed rim element at predetermined intervals. The adjustable rim element selectively engages one of the retaining elements depending upon the size of the tire used and the adjustable rim element is clamped in position. Chain type releasable fasteners are connected between the drum inner surface and the vehicle wheel to releasably hold the dual rim in position.
Description
1~15 364~
,. .
The present invention relates to a rim for attachment to a vehicle wheel so that the wheel may be ;~
converted into a dual wheel, or one having adjacent parallel tires.
In the past, dual rims or hubs have been made for attachment to a regular vehicle wheel, so that the regular wheels may be converted into dual wheels. Dual wheels are usually used where the vehicle must carry heavy loads, so that the load per tire is decreased,per-mitting the use of lower strength tires. However, dual ~;
wheels are also used where it is desirable to increase traction, or where it is desirable to have a larger surface area of contact between the vehicle and the ground. An example of this latter application is in connection with ;
farm tractors, where it is desirable to increase traction and avoid the tendency of the tractor to become stuck by having the wheels bog down in soft terrain.
Where duaI wheels are used, the tires are generally large and expensive. If the vehicle for which the tires are purchased is replaced by another vehicle, more often than not, the replacement vehicle has tires which are of a different size. If the vehicle owner wishes to use presently owned tires and dual rims on the replacement vehicle, this often cannot be done. It is usually necessary ,~
, to purchase new tires or new dual rims because the previously owned counterparts do not fit the replacement vehicle.
In the present invention, a dual rim is provided on which different sizes of tires may be mounted, so that
,. .
The present invention relates to a rim for attachment to a vehicle wheel so that the wheel may be ;~
converted into a dual wheel, or one having adjacent parallel tires.
In the past, dual rims or hubs have been made for attachment to a regular vehicle wheel, so that the regular wheels may be converted into dual wheels. Dual wheels are usually used where the vehicle must carry heavy loads, so that the load per tire is decreased,per-mitting the use of lower strength tires. However, dual ~;
wheels are also used where it is desirable to increase traction, or where it is desirable to have a larger surface area of contact between the vehicle and the ground. An example of this latter application is in connection with ;
farm tractors, where it is desirable to increase traction and avoid the tendency of the tractor to become stuck by having the wheels bog down in soft terrain.
Where duaI wheels are used, the tires are generally large and expensive. If the vehicle for which the tires are purchased is replaced by another vehicle, more often than not, the replacement vehicle has tires which are of a different size. If the vehicle owner wishes to use presently owned tires and dual rims on the replacement vehicle, this often cannot be done. It is usually necessary ,~
, to purchase new tires or new dual rims because the previously owned counterparts do not fit the replacement vehicle.
In the present invention, a dual rim is provided on which different sizes of tires may be mounted, so that
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the dual rim does not have to be replaced if for any reason the tire sizes are changed.
According to the present invention, a rim is provided for converting a vehicle wheel into a dual wheel.
The rim includes a cylindrical drum having a fixed rim ele-ment attached to the drum ou-ter surface adjacent to an outer~
peripheral edge thereof. An adjustable rim element is -slidably located on the drum outer surface. The rim elements are adapted to engage respective beads of a tire on said drum.
Retaining means are provided for releasably locating the adjustable rim element at a plurality of predetermined locations axially spaced from the fixed rim element, and releasable fastening means are coupled to the drum inner surface and adapted to be connected to the vehicle wheel to demountably attach the drum thereto.
A preferred embodiment of the ~resent invention - will now be described, by way of example, with reference to the accompanying drawings, in which:
Fig. 1 is an elevational view, partly broken away, showing a vehicle wheel with a dual rim according to the present invention mounted thereon;
Fig. 2 is an enlarged sectional view o a portion of Fig. 1 represented by circle 2;
Fig. 3 is an enlarged vertical sectional view of a portion of the dual rim shown in Fig. 1 indicated by circle 3; ~
Fig. 4 is a plan view of the dual rim shown in ~ 3 Fig. 1, taken along lines 4-4 of Fig. l;
Fig. 5 is a side elevational view of the dual rim taken along lines 5-5 of Fig. 4;
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Fig. 6 is a vertical sectional view of the upper portion of the wheel and dual rim assembly of Fig D 1 r '' showing a pair of tires mounted thereon to form a dual -~
wheel, including tires; -Fig. 7 is a vertical sectional view similar to Fig. 6, wherein a spacer is located between the dual rim and the vehicle wheel, and wherein larger size tires are ;~
shown; and Fig. 8 is a vertical sectional view similar to Figs. 6 and 7 wherein a larger spacer and still larger ;
tires are shown forming a dual wheel. ;
Referring firstly to Figs. 1 to 5, a dual rim according to the present invention is generally indicated by reference numeral 10. Rim 10 is shown releasably connected to a vehicle wheel 12, which is mounted on a hub 14 attached to a vehicle axle 16. Wheel 12 has an inner rim 18 and an outer rim 20 which are spaced apart and shaped to accommodate the beads of a tire. Wheel 12 ;~
also has a central plate portion 22 which is attached to hub 14 in a conventional manner. Wheel 12 is conventional and is not considered to be part of the present invention, and therefore will not be described in further detail.
Dual rim lO includes a cylindrical drum 24 on ;
which a fixed rim element 26 is mounted adjacent to an outer peripheral edge 28 of drum 24. Fixed rim element 26 is attached to the drum outer surface by welding in the preferred embodiment, and as shown in Fig. 2 has a shape resembling a conventional wheel rim or lip and is adapted to engage a tire bead. However, rim element 26 has a tapered flange portion 29 located adjacent to the drum 24 -to retain a tire bead tightly when a tire is mounted on dual rim 10.
the dual rim does not have to be replaced if for any reason the tire sizes are changed.
According to the present invention, a rim is provided for converting a vehicle wheel into a dual wheel.
The rim includes a cylindrical drum having a fixed rim ele-ment attached to the drum ou-ter surface adjacent to an outer~
peripheral edge thereof. An adjustable rim element is -slidably located on the drum outer surface. The rim elements are adapted to engage respective beads of a tire on said drum.
Retaining means are provided for releasably locating the adjustable rim element at a plurality of predetermined locations axially spaced from the fixed rim element, and releasable fastening means are coupled to the drum inner surface and adapted to be connected to the vehicle wheel to demountably attach the drum thereto.
A preferred embodiment of the ~resent invention - will now be described, by way of example, with reference to the accompanying drawings, in which:
Fig. 1 is an elevational view, partly broken away, showing a vehicle wheel with a dual rim according to the present invention mounted thereon;
Fig. 2 is an enlarged sectional view o a portion of Fig. 1 represented by circle 2;
Fig. 3 is an enlarged vertical sectional view of a portion of the dual rim shown in Fig. 1 indicated by circle 3; ~
Fig. 4 is a plan view of the dual rim shown in ~ 3 Fig. 1, taken along lines 4-4 of Fig. l;
Fig. 5 is a side elevational view of the dual rim taken along lines 5-5 of Fig. 4;
1~836~
Fig. 6 is a vertical sectional view of the upper portion of the wheel and dual rim assembly of Fig D 1 r '' showing a pair of tires mounted thereon to form a dual -~
wheel, including tires; -Fig. 7 is a vertical sectional view similar to Fig. 6, wherein a spacer is located between the dual rim and the vehicle wheel, and wherein larger size tires are ;~
shown; and Fig. 8 is a vertical sectional view similar to Figs. 6 and 7 wherein a larger spacer and still larger ;
tires are shown forming a dual wheel. ;
Referring firstly to Figs. 1 to 5, a dual rim according to the present invention is generally indicated by reference numeral 10. Rim 10 is shown releasably connected to a vehicle wheel 12, which is mounted on a hub 14 attached to a vehicle axle 16. Wheel 12 has an inner rim 18 and an outer rim 20 which are spaced apart and shaped to accommodate the beads of a tire. Wheel 12 ;~
also has a central plate portion 22 which is attached to hub 14 in a conventional manner. Wheel 12 is conventional and is not considered to be part of the present invention, and therefore will not be described in further detail.
Dual rim lO includes a cylindrical drum 24 on ;
which a fixed rim element 26 is mounted adjacent to an outer peripheral edge 28 of drum 24. Fixed rim element 26 is attached to the drum outer surface by welding in the preferred embodiment, and as shown in Fig. 2 has a shape resembling a conventional wheel rim or lip and is adapted to engage a tire bead. However, rim element 26 has a tapered flange portion 29 located adjacent to the drum 24 -to retain a tire bead tightly when a tire is mounted on dual rim 10.
3~;4~
Dual rim 10 also includes an adjustable rim element 30 which is slidably located on the outer surface of drum 24 for movement toward and away from fixed rim element 26. Adjustable rim element 30 is removable from rim 10, as will be apparent from the description below.
Rim 10 also has a plurality of retaining elements or concentric hoops 32 attached to the drum outer surface.
Hoops 32 are axially spaced from fixed rim element 26 at predetermined intervals corresponding to various nominal `
tire sizes as described further below. Hoops 32 are typically welded in place on drum 24.
As shown best in Figs. 3 and 4, adjustable rim element 30 has a tapered flange 34 located adjacent to the drum, and an upright slightly curved flange extending away from drum 24. Flanges 34, 36 are generally in the shape of a conventional wheel rim in order to accommodate the bead of a tire. However, it will be appreciated that the taper of flange 34 would cause adjustable rim eleme~t 30 to be pressed downwardly against drum 24 as a tire mounted on rim element 30 is inflated. This tends to contract and tighten adjustable rim element 30 on the drum and helps to hold it in position. As shown in Fig. 4, adjustable rim element 30 is split at 38, and a pair of transverse flanges 40 are attached to the inner side of adjustable rim element 30 adjacent *o split 38. Transverse flanges 40 are provided with openings 42 (Fig. 3), and a bolt 44 passes therethrough, `
so that flanges 40 and bolt 44 form a clamp for contracting and tightening adjustable rim element 30. This clamp helps 336~
to retain adjustable rim element 30 in position and prevents rotation of the adjustable rim element. Rotation is prevented due to the fact that concentric hoops 32 are discontinuous and thereby form spaces 46 in which flanges 40 are located to abut against adjacent end portions 48 of hoops 32.
Dual rim 10 has an inner peripheral edge portion 50, and the diameter of rim 10 is dimensioned suitably, so that inner peripheral edge 50 fits inside the outer rim 20 ;~
of the conventional vehicle wheel 12, as seen in Fig. 1.
To attach dual rim 10 to vehicle wheel 12, releasable fastening means 52 are coupled between the drum inner surface and the central plate portion 22 of wheel 12.
Fastening means 52 include a threaded fastener 54 in the form of an eye hook 56 or the like passing through a block 58 attached to the drum inner surface. Threaded fastener 54 also includes a releasable connector 60 which is attached !
to central plate portion 22. For this purpose, plate portion 22 is already conventionally formed with holes or openings, and connectors 60 are in the form of standard threaded fasteners passing through these holes. As shown in Fig. 5, there are four blocks 58, and therefore, four threaded fast-eners 54 are provided in the preferred embodiment. However, in larger wheels, five or six such holes may be provided in wheel 12, and therefore a corresponding number of fasteners 54 would be used. Each releasable connector 60 is formed with a U-shaped end portion or clevis 62 in which a removable pin is located and retained by a cotter pin. A length of ~L~983641 ~
chain 64 is coupled between threaded fastener 54 and releasable connector 60 to hold rim 10 in position on wheel 12. Dual rim 10 is removed from wheel 12 by removing the pin in clevis 62, and the releasable fastening means 52 is tightened using nuts 66 threaded onto eye hooks 56.
To change the position of adjustable rim element 30, bolt 44 in the clamp formed by this bolt and transverse flanges 40 is loosened and adjustable rim element 30 is expanded so that it will slide over concentric hoops 32.
Adjustable rim element 30 is positioned adjacent to the desired concentric hoops 32 according to the size of tire to be mounted on rim 10. As mentioned above, hoops 32 are located so that the axial distance between fixed rim element 26 and adjustable rim element 30 corresponds with various nominal tire sizes. For example, an axial spacing of approximately 11 inches between fixed rim element 26 and the first or nearest hoop 32, and an axial spacing of approximately two inches between hoops 32, would permit rim 10 to be used in connection with tires ranging in nominal size from 12.4/38 up to 16.9/38, the last figure in the nominal tire size determining the diameter of dual rim 10. It will be apparent to those skilled in the art that dual rim 10 cannot be used fo~ different tires having different nominal diameters, but only for tires having different nominal tread widths, the tread width being represented by the first figure in nominal tire sizes.
Referring next to Figs. 6 to 8, upper elevational or vertical sectional views of dual rim 10 are shown having tires mounted thereon. In Fig. 6, tires 66 are of a size ~ID83G~ ~
,;. .
in the lower range of the tires which may be mounted on rim 10. In this case, adjustable rim element 30 is located adjacent to the hoop 32 nearest to fixed rim element 26.
In Fig. 7, an intermediate size tire 68 is mounted on rim 10 and adjustable rim element 30 is located adjacent to the intermediate or centre concentric hoop 32. A demountable concentric spacer element 70 is also shown in Fig. 7 located adjacent to the drum inner peripheral edge 50. Spacer 70 is in the form of a pair of concentric staggered circular bands welded together, so that spacer 70 encloses and retains in position the inner peripheral edge portion 50 of rim 10.
It will also be noted from Fig. 7 that chain 64 of releasable fastening means 52 has been let out one length to accommodate -the insertion of spacer 70.
In Fig. 8, still larger tires 72 are mounted on the dual wheel. Tires 72 are of a size at the larger end of the range of tire sizes which may be mounted on dual rim ~ ;~
10, and adjustable rim element 30 is located adjacent to the hoop 32 remote from fixed rim element 26. In this embodiment, a larger width spacer 74, which is similar to spacer 72, is employed to maintain the desired spacing between tires 72. It will again be not~ced that chain 64 of releasable fastening means 52 has been let out another length to accommodate this wider spacer 74.
It will be appreciated, that spacers 70, 74 may be ~ ;
eliminated if desired, but usually it is desirable to maintain a spacing between the tires of approximately 4 inches.
Also, it will be appreciated that each of the pairs of tires 66, 68 and 72 need not be identical in size. In fact, ~836q~L
it will be apparent to those skilled in the art that the nominal diameter of dual rim 10 may be different than that of wheel 12, and that spacers 70, 74 could be made in the form of suitable adapters to match the different diameters of the wheel and rim. This would maximize the flexibility or range of applications with which a particular size of dual rim 10 could be used.
Having described the preferred embodiments of the invention, it will be apparent to those skilled in the art that various modifications may be made to the structure described. For example, adjustable rim element 30 could be held i~ the selective axial positions using different retaining means than concentric hoops 32. For instance, concentric rings of holes could be formed in drum 24 and screw fasteners could pass through these holes from the inside of drum 24 to engage adjustable rim element 32.
Similarly, different configurations of concentric hoops 32 could be used, such as spaced apar~ discontinuous segments of a hoop located around the outer surface or periphery of drum 24. In these alternative structures, adjustable rim element 30 likely would be made continuous with appro-priate modifications to permit axial adjustability. However, in the preferred embodiment, the structure described is simple and may be easily and quickly adjusted as re~uired.
It will also be appreciated that although welding has been described in the preferred embodiment for attaching the various elements, the structure described is considered to be amenable to roll forming.
_ g
Dual rim 10 also includes an adjustable rim element 30 which is slidably located on the outer surface of drum 24 for movement toward and away from fixed rim element 26. Adjustable rim element 30 is removable from rim 10, as will be apparent from the description below.
Rim 10 also has a plurality of retaining elements or concentric hoops 32 attached to the drum outer surface.
Hoops 32 are axially spaced from fixed rim element 26 at predetermined intervals corresponding to various nominal `
tire sizes as described further below. Hoops 32 are typically welded in place on drum 24.
As shown best in Figs. 3 and 4, adjustable rim element 30 has a tapered flange 34 located adjacent to the drum, and an upright slightly curved flange extending away from drum 24. Flanges 34, 36 are generally in the shape of a conventional wheel rim in order to accommodate the bead of a tire. However, it will be appreciated that the taper of flange 34 would cause adjustable rim eleme~t 30 to be pressed downwardly against drum 24 as a tire mounted on rim element 30 is inflated. This tends to contract and tighten adjustable rim element 30 on the drum and helps to hold it in position. As shown in Fig. 4, adjustable rim element 30 is split at 38, and a pair of transverse flanges 40 are attached to the inner side of adjustable rim element 30 adjacent *o split 38. Transverse flanges 40 are provided with openings 42 (Fig. 3), and a bolt 44 passes therethrough, `
so that flanges 40 and bolt 44 form a clamp for contracting and tightening adjustable rim element 30. This clamp helps 336~
to retain adjustable rim element 30 in position and prevents rotation of the adjustable rim element. Rotation is prevented due to the fact that concentric hoops 32 are discontinuous and thereby form spaces 46 in which flanges 40 are located to abut against adjacent end portions 48 of hoops 32.
Dual rim 10 has an inner peripheral edge portion 50, and the diameter of rim 10 is dimensioned suitably, so that inner peripheral edge 50 fits inside the outer rim 20 ;~
of the conventional vehicle wheel 12, as seen in Fig. 1.
To attach dual rim 10 to vehicle wheel 12, releasable fastening means 52 are coupled between the drum inner surface and the central plate portion 22 of wheel 12.
Fastening means 52 include a threaded fastener 54 in the form of an eye hook 56 or the like passing through a block 58 attached to the drum inner surface. Threaded fastener 54 also includes a releasable connector 60 which is attached !
to central plate portion 22. For this purpose, plate portion 22 is already conventionally formed with holes or openings, and connectors 60 are in the form of standard threaded fasteners passing through these holes. As shown in Fig. 5, there are four blocks 58, and therefore, four threaded fast-eners 54 are provided in the preferred embodiment. However, in larger wheels, five or six such holes may be provided in wheel 12, and therefore a corresponding number of fasteners 54 would be used. Each releasable connector 60 is formed with a U-shaped end portion or clevis 62 in which a removable pin is located and retained by a cotter pin. A length of ~L~983641 ~
chain 64 is coupled between threaded fastener 54 and releasable connector 60 to hold rim 10 in position on wheel 12. Dual rim 10 is removed from wheel 12 by removing the pin in clevis 62, and the releasable fastening means 52 is tightened using nuts 66 threaded onto eye hooks 56.
To change the position of adjustable rim element 30, bolt 44 in the clamp formed by this bolt and transverse flanges 40 is loosened and adjustable rim element 30 is expanded so that it will slide over concentric hoops 32.
Adjustable rim element 30 is positioned adjacent to the desired concentric hoops 32 according to the size of tire to be mounted on rim 10. As mentioned above, hoops 32 are located so that the axial distance between fixed rim element 26 and adjustable rim element 30 corresponds with various nominal tire sizes. For example, an axial spacing of approximately 11 inches between fixed rim element 26 and the first or nearest hoop 32, and an axial spacing of approximately two inches between hoops 32, would permit rim 10 to be used in connection with tires ranging in nominal size from 12.4/38 up to 16.9/38, the last figure in the nominal tire size determining the diameter of dual rim 10. It will be apparent to those skilled in the art that dual rim 10 cannot be used fo~ different tires having different nominal diameters, but only for tires having different nominal tread widths, the tread width being represented by the first figure in nominal tire sizes.
Referring next to Figs. 6 to 8, upper elevational or vertical sectional views of dual rim 10 are shown having tires mounted thereon. In Fig. 6, tires 66 are of a size ~ID83G~ ~
,;. .
in the lower range of the tires which may be mounted on rim 10. In this case, adjustable rim element 30 is located adjacent to the hoop 32 nearest to fixed rim element 26.
In Fig. 7, an intermediate size tire 68 is mounted on rim 10 and adjustable rim element 30 is located adjacent to the intermediate or centre concentric hoop 32. A demountable concentric spacer element 70 is also shown in Fig. 7 located adjacent to the drum inner peripheral edge 50. Spacer 70 is in the form of a pair of concentric staggered circular bands welded together, so that spacer 70 encloses and retains in position the inner peripheral edge portion 50 of rim 10.
It will also be noted from Fig. 7 that chain 64 of releasable fastening means 52 has been let out one length to accommodate -the insertion of spacer 70.
In Fig. 8, still larger tires 72 are mounted on the dual wheel. Tires 72 are of a size at the larger end of the range of tire sizes which may be mounted on dual rim ~ ;~
10, and adjustable rim element 30 is located adjacent to the hoop 32 remote from fixed rim element 26. In this embodiment, a larger width spacer 74, which is similar to spacer 72, is employed to maintain the desired spacing between tires 72. It will again be not~ced that chain 64 of releasable fastening means 52 has been let out another length to accommodate this wider spacer 74.
It will be appreciated, that spacers 70, 74 may be ~ ;
eliminated if desired, but usually it is desirable to maintain a spacing between the tires of approximately 4 inches.
Also, it will be appreciated that each of the pairs of tires 66, 68 and 72 need not be identical in size. In fact, ~836q~L
it will be apparent to those skilled in the art that the nominal diameter of dual rim 10 may be different than that of wheel 12, and that spacers 70, 74 could be made in the form of suitable adapters to match the different diameters of the wheel and rim. This would maximize the flexibility or range of applications with which a particular size of dual rim 10 could be used.
Having described the preferred embodiments of the invention, it will be apparent to those skilled in the art that various modifications may be made to the structure described. For example, adjustable rim element 30 could be held i~ the selective axial positions using different retaining means than concentric hoops 32. For instance, concentric rings of holes could be formed in drum 24 and screw fasteners could pass through these holes from the inside of drum 24 to engage adjustable rim element 32.
Similarly, different configurations of concentric hoops 32 could be used, such as spaced apar~ discontinuous segments of a hoop located around the outer surface or periphery of drum 24. In these alternative structures, adjustable rim element 30 likely would be made continuous with appro-priate modifications to permit axial adjustability. However, in the preferred embodiment, the structure described is simple and may be easily and quickly adjusted as re~uired.
It will also be appreciated that although welding has been described in the preferred embodiment for attaching the various elements, the structure described is considered to be amenable to roll forming.
_ g
Claims (9)
PROPERTY OR PRIVILEGE IS CLAIMED ARE DEFINED AS FOLLOWS:
1. A rim for converting a vehicle wheel into a dual wheel, the rim comprising: a cylindrical drum having a fixed rim element attached to the drum outer surface adja-cent to an outer peripheral edge thereof; an adjustable rim element slidably located on said drum outer surface; said rim elements being adapted to engage respective beads of a tire on said drum; retaining means for releasably locating the adjustable rim element at a plurality of predetermined locations axially spaced from said fixed rim element; and releasable fastening means coupled to the drum inner surface and adapted to be connected to said vehicle wheel to de-mountably attach the drum thereto.
2. A rim as claimed in claim 1 wherein the retaining means includes a plurality of retaining elements attached to the drum outer surface, said retaining elements being axially spaced from the fixed rim element at predetermined intervals, and wherein the adjustable rim element is adapted to selectively engage one of said retaining elements.
3. A rim as claimed in claim 2 wherein said retaining elements are in the form of concentric hoops, and wherein the adjustable rim element is expansile, so that it is axially movable past said hoops.
4. A rim as claimed in claim 2 or 3 wherein the retaining means includes releasable clamping means for preventing relative movement between the adjustable rim element and said one of the retaining elements.
5. A rim as claimed in claim 3 wherein the retaining means includes a clamp for contracting and tightening the adjustable rim element and for preventing rotation of said adjustable rim element relative to the drum.
6. A rim as claimed in claim 1, 2 or 3 wherein said retaining means are axially spaced from the fixed rim element at predetermined locations corresponding to nominal tire widths.
7. A rim as claimed in claim 1, 2 or 3 wherein said releasable fastening means includes: a threaded fastener attached to the drum inner surface; a releasable connector.
adapted to be attached to said vehicle wheel; and a chain coupled between said threaded fastener and said releasable connector.
adapted to be attached to said vehicle wheel; and a chain coupled between said threaded fastener and said releasable connector.
8. A rim as claimed in claim 1, 2 or 3 and further comprising a demountable concentric spacer element adapted to be located adjacent to the drum inner peripheral edge for spacing the drum from the vehicle wheel.
9. A rim as claimed in claim 3 wherein the adjustable rim element has a tapered flange located adjacent to the drum, so that an inflated tire mounted on the rim tends to contract and tighten the adjustable rim element on the drum.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CA276,438A CA1083641A (en) | 1977-04-19 | 1977-04-19 | Dual rim for automotive vehicle |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CA276,438A CA1083641A (en) | 1977-04-19 | 1977-04-19 | Dual rim for automotive vehicle |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CA1083641A true CA1083641A (en) | 1980-08-12 |
Family
ID=4108423
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CA276,438A Expired CA1083641A (en) | 1977-04-19 | 1977-04-19 | Dual rim for automotive vehicle |
Country Status (1)
| Country | Link |
|---|---|
| CA (1) | CA1083641A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4501450A (en) * | 1982-01-19 | 1985-02-26 | Mol Pieter K | Connecting device between two wheel rims |
-
1977
- 1977-04-19 CA CA276,438A patent/CA1083641A/en not_active Expired
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4501450A (en) * | 1982-01-19 | 1985-02-26 | Mol Pieter K | Connecting device between two wheel rims |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| MKEX | Expiry |