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Publication numberUS3630487 A
Publication typeGrant
Publication dateDec 28, 1971
Filing dateFeb 16, 1970
Priority dateFeb 16, 1970
Publication numberUS 3630487 A, US 3630487A, US-A-3630487, US3630487 A, US3630487A
InventorsWechter Lester E Jr
Original AssigneeWechter Lester E Jr
Export CitationBiBTeX, EndNote, RefMan
External Links: USPTO, USPTO Assignment, Espacenet
Wheel-raising device
US 3630487 A
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Description  (OCR text may contain errors)

United States Patent [111 3,630,487

[72] inventor Lester E. wecllter, Jr. l,904,693 4/1933 Myers et al. 254/88 X 404 Collins Avenue, West Seneca, N.Y. 2,227,750 1/1941 l-linson 254/88 [2.1] A I N Primary Examiner-William H. Schultz pp o. Filed i 1970 Attorney Christel & Bean [45] Patented Dec. 28, 1971 [54] WHEEL-RAISING DEVICE 8 Claims, 7 Drawing Figs.

[52] US. Cl 254/88, 248/352 [51] Int. Cl 866119/00 [50] Field olSearcll 248/352; 254/5 A, 5 R, 45, 50, 88, 104

[56] Relerences Cited,

UNITED STATES PATENTS 1,503,781 8/1924 Baker 254/88 X ABSTRACT: A wheel-raising device comprising a base member, a ramp member joined at one end to the base member, a plurality of spaced-apart vertical supporting members positioned between the base and ramp, and a wheelblocking member positioned on the ramp. The height to which the wheel is raised is adjustable in both relatively large and small ranges. The wheel-blocking member is releasably positioned at various locations along the ramp member, and the orientation of the blocking member at each location can be changed to vary the angle between the ramp and the wheelcontacting surface of the blocking member. The base, ramp, and supporting member can be fixedly attached to each other or, alternatively, pivotally connected whereby the device is collapsible for storage.

Patented Dec. "28, 1971 3,630,481

' 2 Sheets-$heet 2 INVENTOR. L esZer'E weczfer, J?!

ATTORNEYS.

WHEEL-RAISING DEVICE BACKGROUND OF THE INVENTION This invention relates to vehicle wheel-raising devices and, more particularly, to a wheel-raising device of the type onto which a wheel is driven whereupon it is supported and raised.

One area of use of the present invention is in conjunction with mobile homes or trailers. When such vehicles are parked or uneven ground, a common occurrence at camping sites, it is desired to raise one side or end of the trailer to provide a more level, comfortable condition of the floor.

Wheel-raising devices have been proposed as a solution to this problem. They must be sufficiently strong in order to support such heavy vehicles and the contents thereof. In addition, these devices should be adjustable in height to accommodate different degrees of uneveness in terrain at various locations. In some wheel-raising devices heretofore available, the components thereof which support the entire weight are movable into different positions to provide this height adjustment. As a result the attributes of structural rigidity and adjustability in height become conflicting. Other types of wheel-raising devices are constructed in a manner which requires that the height adjustment be made before the vehicle wheel is placed on the device. As a result, the vehicle operator must estimate the proper setting or adjustment for the device merely from a visual inspection of the terrain. This undesirably overburdens the operator and often results in an improper adjustment thus requiring the vehicle wheel to be moved off the device and another adjustment made. In addition, many devices hereto fore available are cumbersome to assemble and other are not readily and easily stored in small places.

SUMMARY OF THE INVENTION It is, therefore, an object of this invention to provide a wheel-raising device which allows height adjustment without sacrificing or limiting the structural rigidity of the device.

It is a further object of this invention to provide such a wheel-raising device which allows height adjustment to be per formed while the wheel is on the raising device.

It is a further object of this invention to provide such a wheel-raising device in which the height adjustment provided thereby may be performed in both relatively large and small ranges.

It is a further object of this invention to provide such a wheel-raising device which is collapsible so as to be conveniently stored in small spaces and yet easily assembled into operative position.

The present invention provides a vehicle wheel-raising device including a base member adapted to be placed on the ground and a ramp member joined at one end to the base member. A plurality of vertical supporting members of unequal height extend between the ramp and base and are arranged in a manner whereby the ramp is inclined with respect to the base. The device includes a wheel-blocking member releasably connected to the ramp member at any one of a number of locations along the top surface of the ramp member whereby the height to which the wheel is raised may be varied. The angle between the plane of the ramp member and the surface of the blocking member which contacts the wheel also is variable so as to provide an additional range of adjustment. In addition, the ramp and base may be pivotally connected and the supporting members pivotally connected to the base whereby the device is collapsible to facilitate storage.

By way of illustration the present invention will be described with particular reference to trailers or mobile homes but the principles of the invention may be variously applied for raising wheels of other kinds of vehicles such as cars, trucks, buses, and airplanes to mention a few. The foregoing and additional advantages and characterizing features of the present invention will become clearly apparent upon a reading of the ensuing detailed description of two illustrative embodiments thereof together with the included drawing depicting the same.

BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a side elevational view of one embodiment of a wheel-raising device constructed in accordance with the present invention as it would appear in use;

FIG. 2 is an enlarged side elevational view of the wheel-raising device of FIG. I;

FIG. 3 is a top plan view thereof;

FIG. 4 is an end elevational view thereof;

FIG. 5 is a side elevational view of another embodiment of the wheel-raising device provided by the present invention;

FIG. 6 is a top plan view thereof; and

FIG. 7 is an end elevational view thereof.

DETAILED DESCRIPTION OF THE ILLUSTRATED EMBODIMENTS FIG. I shows a wheel-raising device 10 provided by the present invention as it would appear in use under one wheel or tire II of a vehicle 12, such as a mobile home or trailer. The device 10 comprises a base member 13 adapted to be placed on the ground or road and a ramp member 14 connected at one end to base member 13. Wheel-raising device I0 further comprises a plurality of vertical supporting members I5 extending between and spaced along the base and ramp members I3, 14. Supporting members I5 preferably are spaced equally, and the number is merely a matter of choice and convenience, depending to a large extent on the length of base member 13 and ramp member 14. In addition, vertical supporting members 15 are of unequal height and arranged as shown in FIG. 1 so that ram member 14 is inclined with respect to base member I3.

Wheel-raising device 10 also comprises a wheel-blocking member 16 which is releasably connected to ramp member 14 at any one of a plurality spaced locations along the top surfaces thereof. Blocking member I6 is adapted to contact the circumferential or tread surface of wheel or tire 11 as shown in FIG. I, and depending upon where blocking member 16 is connected along the top surface of ramp 14, the height to which wheel 11 is raised is adjustable within a first range. In addition, the plate, of blocking member 16 can be changed at each location, as shown by the dotted line representation in FIG. 1, whereby the angle between the plane of ram member 14 and the plane of the surface of blocking member 16 which contacts or abuts against wheel 11 is adjustable. By virtue of this arrangement, the height to which wheel 11 is raised is adjustable in an additional range.

Referring now to FIGS. 24 there is shown in more detail a first embodiment of the wheel-raising device provided by the present invention. Base member 13 comprises a rectangular plate, preferably of sheet steel, and likewise ramp member 14 is a rectangular plate of sheet steel. In preferred form base 13 and ramp 14 each are 20 inches in length and 8 inches in width. It should be noted, however, that ramp l4 and base 13 can be made of different materials and in various sizes without departing from the spirit and scope of this invention. In this particular embodiment, ramp I4 is fixedly attached, as by welding, at one end to base member 13 as shown in FIG. 2 and is disposed in a plane extending at an acute angle relative to the plane of base member I3 so as to be inclined from the ground or road on which base member 13 is placed.

Each of the vertical supporting members I5 is fixedly attached at corresponding ends thereof to base and ramp members I3 and 14, respectively. In preferred form each of the members 15 comprises a steel plate which is welded to base 13 and ramp 14 as indicated in FIG. 2. Each plate I5 has a horizontal length preferably about equal to the width of base 13 and ramp 14, which from the illustrative dimensions given earlier would be about 8 inches. Supporting members 15 have unequal vertical heights, however, and are arranged such that the height thereof progressively increases as the distance between base 13 and ramp 14 increases as shown in FIG. 2. In preferred form the height of the device 10 measured along a line perpendicular to the plane of base member I3 from the bottom thereof to the uppermost point on ramp I4 is about 5 inches.

Wheel-blocking member 16, as shown most clearly in FIGS. 2 and 3, in preferred form has three surfaces or sides 17, 18 and 19 which define at least two unequal included angles. ln this particular illustration, wheel-blocking member 16 comprises an angle iron which provides sides 17 and 18 and an iron plate welded thereto to provide side 19. The angle included between sides 17 and 18 is a right angle, and the other two angles are equal and acute.

The operative position of wheel-blocking member 16 is with the longitudinal axis thereof, in other words the axis parallel to the planes of surfaces l7, l8 and 19 extending perpendicular to the direction of travel of a wheel along ramp 14. The length of blocking member 16 should be about equal to the width of ramp 14 to provide an adequate amount of blocking surface in contact with the wheel. Spaced-apart lugs 20 are provided in wheel-blocking member 16 and project from two sides thereof. More particularly, as shown in F IGS. 2 and 3, two lugs 20 project from side 19 and are spaced apart along a line parallel to the longitudinal axis of blocking member 16. In a similar manner, two lugs 20 project from side 17 and are spaced apart along a line parallel to the longitudinal axis of member 16. Lugs 20 conveniently can comprise rivets extending through apertures provided in the sides of blocking member and spot welded therein. in addition, lugs 20 should be spaced apart a distance less than the length of blocking member 16 but greater than the axial width of the wheels or tires which will be raised by the device.

When wheel-blocking member 16 is in an operative position on ramp 14, lugs 20 projecting from one side, for example side 17 as shown in FIG. 2, are received in a set oftwo ofa plurality of apertures 21 provided in ramp 14. In particular, each set comprises two apertures spaced along a line perpendicular to the direction of travel of a wheel on ramp 14 and the centers thereof are a spaced apart a distance equal to the distance between the centers of lugs 20 projecting from a side of wheelblocking member 16. A plurality of sets of apertures, in turn, are provided at spaced locations along ramp 14. By virtue of this arrangement, wheel-blocking member 16 is releasably connected in ramp member 14 and at any one ofa number of spaced locations along the length thereof.

In addition,wheel-blocking member 16 can be positioned in different orientations at any one of the locations along ramp 14 whereby the side thereof contacting the wheel extends from ramp 14 at selected different angles relative thereto. Wheel-blocking member 16 is positioned in the example of FIG. 2 with side 17 in contact with the top surface of ramp l4 and with side 18 providing the surface which contacts or abuts the tread portion of the wheel to be raised. The wheel-contacting surface is disposed in a plane perpendicular to the plane of ramp 14. The angle between ramp l4 and the wheel-contacting surface of member can be changed simply by lifting member 16 from ramp l4 enough so that lugs 20 are no longer received in apertures 21 and then rotating member 16 about its longitudinal axis so that the next surface thereof which also has lugs extending therefrom can be connected on ramp 14. More particularly, it member 16 as shown in FIG. 2 is removed from ramp 14 in the aforementioned manner, rotated clockwise about the longitudinal axis thereof until side 19 and ramp 14 are parallel and then lowered thereon so that lugs 20 from side 19 are received in corresponding apertures 21 in ramp 14, said 17 will be the wheel-contacting surface and will extend from ramp 14 at other than a right angle. More specifically, side 17 of blocking member 16 in this position is disposed in a plane extending from the plane of ramp 14 at an angle greater than 90.

lt should be apparent, therefore, that with blocking member 16 in this other orientation, the height to which the wheel is raised is slightly less than that corresponding to the orientation shown in FIG. 2, assuming that member 16 is connected in ramp 14 at the same location for both orientations. When wheel-blocking member 16 is constructed as shown in FIG. 2, that is with two equal included angles and a third, different angle, two angles of adjustment are provided. Although this construction is preferred, blocking member 16 could have all three included angles of difierent sizes so as to provide three angles of adjustment between the wheel-contacting surface thereof and ramp 14.

It will be noted that wheel-blocking member 16 preferably is formed from cast iron which provides sufficient structural rigidity while being economical to manufacture. Other materials can be substituted, however, without departing from the spirit and scope of this invention. For example, blocking member 16 could be a solid block of wood having a triangular cross section and provided with dowel pins to serve as lugs.

The wheel-raising device 10 of the present invention is used in the following manner. When the rest position of a vehicle, such as the one designated 12, is determined and it is found necessary to raise one of the wheels thereof. such as wheel 11 in FIG. 1, device 10 with blocking member 16 removed therefrom is placed behind wheel 11 with base 13 on the ground or road and oriented so that wheel 11 can be driven up onto ramp 14. Vehicle 12 then is moved toward device 10 so as to drive wheel 11 up onto ramp 14. When wheel 11 has traveled along ramp 14 a distance sufficient to raise wheel 11 to a height necessary to provide the desired degree of levelness in vehicle 12, wheel 11 is blocked against travel down ramp 14 by connection of wheel-blocking member 16 in ramp 14 at a location therealong whereby a side of member 16 contacts the tread surface of wheel 11 in a manner similar to that shown in FIG. 1. The location of wheel 11 along ramp 14 and hence the height to which the wheel is raised can be maintained quite exactly. This is because the location of the wheelcontacting surface of blocking member 16 is adjustable along the longitudinal axis of ramp 14 and, in addition, the angle between the plane of ramp l4 and that of the wheel-contacting surface of member 16 is adjustable by virtue of the aforementioned construction whereby the orientation of wheelblocking member 16 can be changed.

FIGS. -7 illustrate a second embodiment 30 of the wheelraising device provided by the present invention. In addition to having all the attributes of wheel-raising device shown in FIGS. 14, this embodiment is readily collapsible so as to be easily stored in small spaces and yet easily assembled into operative position. Wheel-raising device 30 includes a base member 31 which in this particular embodiment comprises a rectangular plate 32 and first and second upstanding flange members 33 extending from plate 32 and disposed in planes perpendicular to the plane of plate member 32 and parallel to the longitudinal axis of plate 32. Plate 32 and flanges 33 preferably are of sheet steel, and base 31 may be about inches in length and 8 /2 in width.

Wheel-raising device further includes a ramp member 35 which comprises a rectangular plate connected at one end thereof to base member 31 by a pivotal connection designated 36 in FlG. 5. ln particular, ramp 35 is pivotally connected to upstanding flanges 33, 34 of base 31 by any suitable means, for example a pin movable within a sleeve welded to ramp 35, the pin extending perpendicular to the longitudinal axis of ramp 35 and journaled at each end thereof in corresponding apertures provided in flanges 33. Ramp 35 preferably is about 20 inches in length and of a width, for example 8 inches, permitting it to fit between flanges 33 in the manner shown in FIG. 5.

A wheel-blocking member 40 also is included and is similar to blocking member 16 of the first embodiment. Blocking member 40 in preferred from has three sides 41, 42, and 43 which define at least two unequal included angles, the angle between sides 41 and 42 being a right angle and the other angles being acute and equal. Blocking member 40 likewise is formed preferably from cast iron with an angle iron providing sides 41 and 42 and a plate welded thereto providing side 43. The length of blocking member 40 should be about equal to the width of ramp 35 to provide an adequate amount of blocking surface in contact with the wheel when blocking member 40 is in an operative position wherein the longitudinal axis thereof extends perpendicular to the direction of travel of a wheel along ramp 14. The longitudinal axis, of course, is parallel to the planes ofsides 41, 42 and 43.

Blocking member 40 also is provided with spaced-apart lugs 44 two of which project from side 41 and another two from side 43. Lugs 44 on each of the sides 41 and 43 are spaced apart a distance greater than the axial width of a wheel to be raised and along a line parallel to the longitudinal axis of member 40. Lugs 44 likewise advantageously can be provided by rivets projecting through apertures in the sides of blocking member 40 and spot welded therein. Corresponding apertures 45 are provided in ramp 35 in sets of two spaced along a line perpendicular to the direction of travel of a wheel along ramp 35, the centers of holes 45 being spaced apart a distance equal to the distance between the centers of lugs 44 projecting from a side of wheel-blocking member 40. A plurality of sets of apertures 45 are provided along ramp 35. By virtue of this arrangement wheel-blocking member 40, like blocking member 16 included in the first embodiment, is releasably connected in ramp member 35 and at any one of a number of spaced locations along the length thereof. Also like member 16, wheelblocking member 40 can be positioned in different orientations at any one of the locations along ramp 35 whereby the side thereof contacting the wheel extends from ramp 35 at selected different angles relative thereto.

Wheel raising device 30 also includes a plurality of vertical supporting members 50 extending between and spaced along the base and ramp members 31, 35. The spacing between and number of supporting members 50 depends to a large extent on the length of base member 31 and ramp member 35. In addition, vertical supporting members 50 are of unequal height and arranged as shown in FIG. 5 so that ramp member 14 is inclined with respect to base member 31.

In this embodiment, each of the vertical supporting members 50 is pivotally connected at one end thereof to base member 31 whereby, in conjunction with the pivotal connection between base 31 and ramp 35, the device 30 can be collapsed and thus easily stored in small spaces. In preferred form, each of the members 50 comprises a plate having a horizontal length slightly less than the width of plate 32, and each plate is pivotally connected by suitable means at opposite ends thereof to'flanges 33, 34 of base 31. For example, the pivotal connection designated 51 in FIG. 5 comprises a pin 52 rotatable in a sleeve 53 which sleeve is attached to plate 50 near the bottom edge thereof, sleeve 53 having a length slightly less than plate 32. Opposite ends of pin 52 are rotatably received in corresponding apertures provided in flanges 33 and 34. In addition, similar pivotal connections would be provided for the rest of the vertical supporting members 50 positioned between base 31 and ramp 35.

Ramp member 35 is provided with a plurality of stops 54 on the underside thereof which stops are adapted to abut the other end of each of the vertical supporting members 50 and restrain further pivotal movement thereof. Stops 54 are provided in pairs near the outer edges of ramp 35 and spaced along a line perpendicular to the longitudinal axis of ramp 35, as shown in FIG. 6. In addition, each pair is located along ramp 35 so as to abut a corresponding plate or supporting member 50 when it is pivoted to a vertical position as shown in FIG. 5. Stops 54 preferably are formed in ramp 35 by the wellknown technique of gusseting in which a tool is forced or punched about halfway into ramp 35 so that the strength of the metal is not adversely impaired. Alternatively stops 54 can be separate elements attached to the underside of ramp 35 in a similar arrangement and by suitable means such as welding.

By virtue of this arrangement, when wheel-raising device 30 is not to be in use and it is desired to store the same, ramp member 35 is raised by hand slightly and vertical supporting members 50 are pivoted in a clockwise direction from their operative positions shown in FIG. 5 to a horizontal position where they rest on plate 32 of base member 31. Alternatively, the entire device can be picked up by hand, rotated 90 clockwise from the orientation shown in FIG. 5, and ramp 35 moved in a direction so as to increase the angle between it and base 31, whereupon supporting members 50 by gravity move about 90 into contact with base 31. Ramp 35 then is lowered to a similar horizontal position thereby resting on supporting members 50 and base 31. Wheel blocking member 40 can be disconnected from ramp 35 if desired. As a result the entire device can be stored easily in small spaces.

When wheel-raising device 30 is to be put in an operative position such as that shown in FIG. 4, ramp member 35 is grasped at the end and raised to an inclined position as shown in FIG. 5 and supporting members 50 are pivoted from horizontal to vertical position whereupon they contact or abut corresponding stops 54. Alternatively, assembly can be aided by the action of gravity whereby the device is grasped at the end where base 31 and ramp 35 are pivoted and held in a vertical position allowing supporting member 50 to move about into place. This assembly operation can be facilitated by the provision of additional stops 55 on plate 32 near each supporting member 50 whereby each member 50 is restrained against further pivotal movement in the same direction once a vertical position is reached. in addition, movement of supporting members 50 in unison can be accomplished by including a flexible pull cord (not shown) connected to each of the members 50 at corresponding ends thereof.

When placed in the operative position shown in FIG. 5 but with blocking member 40 removed, wheel-raising device 30 is used in the same manner as device 10 previously described. The vehicle is moved toward device 30 so that the wheel thereof is driven up onto ramp member 35 and stopped at a location which raises the wheel a distance sufficient to put the vehicle in the desired level condition. This location of the wheel on ramp 35 is maintained by connecting blocking member 40 therein so that a surface thereof contacts or abuts the tread of the wheel. This can be done rather exactly by virtue of the fact that additionally the orientation of member 40 can be changed so as to vary the angle between ramp 35 and the wheel-blocking surface of member 40.

The present invention thus accomplishes its intended objects. Adjustability in height is obtained without sacrificing structural rigidity because vertical supporting members 15 and 50, which support ramp members 14 and 35, respectively, in the two illustrative embodiments, in no way are utilized also to provide the height adjustment. Instead a separate wheelblocking member releasably connected in the ramp at spaced locations therealong allows adjustment. Instead a separate wheel-blocking member releasably connected in the ramp at spaced locations therealong allows adjustment in the height to which the wheel is raised. Moreover, this arrangement allows height adjustment while the wheel is on the device rather than requiring that the adjustment be performed beforehand. Two ranges in this adjustment are possible because the blocking member can be positioned at various locations along the ramp and at each of these locations the angle between the ramp and the wheel contacting surface of the blocking member can be changed. In addition, the device can be stored easily in small spaces by virtue of the pivotally connected ramp and base and pivotally connected supporting members.

While two specific embodiments of the invention have been described, this has been done by way of illustration without thought of limitation.

Iclaim:

1. A vehicle wheel raising device comprising:

a. a base member adapted to be placed on a supporting surface, for example the ground;

b. a ramp member connected at one end to said base member;

c. a plurality of generally vertical supporting members extending between and positioned along said base and ramp members, said supporting members terminating at the upper ends thereof along a plane inclined with respect to said, base member and arranged so that said ramp member is inclined with respect to said base member; and

d. a wheel-blocking member having three sides which define at least two unequal included angles and provided on at least two sides thereof with two spaced-apart connecting means for releasable engagement with corresponding pairs of connecting means provided on and spaced along said ramp member, whereby said wheel-blocking member is releasably connected to said ramp member at any one of a number of spaced locations along the top surface thereof, and whereby said wheel-blocking member is adapted to be connected in different orientations at each location on said ramp member whereby the angle between the plane of said ramp and the plane of the wheel-contacting surface of said wheel-blocking member can be varied. 2. The wheel-raising device as defined in claim I wherein said ramp member is fixedly attached at the one end to said base member and wherein each of said vertical supporting members is fixedly attached at corresponding ends thereof to said blade and ramp member.

3. The wheel-raising device as defined in claim 2 wherein said base and ramp member each comprises a generally rectangular plate and wherein each of said vertical supporting members comprises a plate having a width substantially equal to the width of said base and said ramp.

4. The wheel-raising device as defined in claim 1 wherein said ramp member is pivotally connected at the one end to said base member and wherein each of said vertical supporting members is pivotally connected at one end thereof to said base member.

5. The wheel-raising device as defined in claim 4 wherein said ramp member is provided with stops on the underside thereof adapted to abut the other end of said supporting members and restrain further pivotal movement thereof when moved to a vertical position.

6. The wheel-raising device as defined in claim 4 wherein said base member comprises a generally rectangular plate and two upstanding flange members on opposite edges thereof, said ramp member comprises a generally rectangular plate having a width slightly less than that of said baseplate and pivotally connected to said upstanding flanges, and wherein each of said vertical supporting members comprises a plate having a width slightly less than the width of said baseplate and pivotally connected to said upstanding flanges.

7. The wheel-raising device as defined in claim 6 wherein each of said vertical supporting members is attached along one edge to a sleeve extending perpendicular to and between said flange members and wherein a pin extending through said sleeve is rotatably connected at opposite ends in each of said flanges.

8. A vehicle wheel raising device comprising:

a. a base'member adapted to be placed on a supporting surface, for example the ground;

b. a ramp member connected at one end to said base member;

c. a plurality of vertical supporting members extending between and spaced along said base and ramp members, said supporting members being of unequal height and arranged so that said ramp member is inclined with respect to said base member; and 1 d. a wheel-blocking member having three sides which define at least two unequal included angles and wherein at least two sides of said wheel-blocking member are provided with two spaced-apart lugs projecting therefrom, said ram member being provided with corresponding pairs of apertures being spaced along said ramp member, whereby said wheel-blocking member is releasably connected to said ramp member at any one ofa number of spaced locations along the top surface thereof, and said wheelblocking member is adapted to be connected in different orientations at each location on said ramp member whereby the angle between the plane of said ramp and the plane of the wheel-contacting surface of said wheelblocking member can be varied.

Patent Citations
Cited PatentFiling datePublication dateApplicantTitle
US1503781 *Jan 10, 1923Aug 5, 1924Myron BakerTiltable vehicle platform
US1904693 *Aug 10, 1928Apr 18, 1933Fayette Myers LaVehicle lifting device
US2227750 *Sep 21, 1939Jan 7, 1941W E LoockeVehicle jack
Referenced by
Citing PatentFiling datePublication dateApplicantTitle
US4108421 *Dec 7, 1977Aug 22, 1978The Raymond Lee Organization, Inc.Leveling unit for parked vehicles
US4836501 *Jul 5, 1988Jun 6, 1989Baer William FStructure leveling device
US4895347 *Nov 21, 1988Jan 23, 1990Anderson Jerome JFor use with wheeled vehicles for enhancing starting ability
US5762460 *Jun 28, 1996Jun 9, 1998Kelley Atlantic Ltd.Loading dock
US5971692 *May 27, 1998Oct 26, 1999Kelley Atlantic Ltd.Truck leveler
US7162760 *Jun 19, 2003Jan 16, 2007Schweitzer Kathleen MMethods and apparatus for a step mounting system
EP1340710A1 *Feb 3, 2003Sep 3, 2003Tri-Lynx Corporation, a Texas CorporationWheel positional restraint device and method for using the same
Classifications
U.S. Classification254/88, 248/352, 188/32
International ClassificationB66F7/00, B66F7/24
Cooperative ClassificationB66F7/243
European ClassificationB66F7/24B