CA1098929A - Retractable landing gear for trailers - Google Patents
Retractable landing gear for trailersInfo
- Publication number
- CA1098929A CA1098929A CA299,857A CA299857A CA1098929A CA 1098929 A CA1098929 A CA 1098929A CA 299857 A CA299857 A CA 299857A CA 1098929 A CA1098929 A CA 1098929A
- Authority
- CA
- Canada
- Prior art keywords
- trailer
- landing gear
- gear assembly
- convertor
- front trailer
- 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
- B62—LAND VEHICLES FOR TRAVELLING OTHERWISE THAN ON RAILS
- B62D—MOTOR VEHICLES; TRAILERS
- B62D53/00—Tractor-trailer combinations; Road trains
- B62D53/04—Tractor-trailer combinations; Road trains comprising a vehicle carrying an essential part of the other vehicle's load by having supporting means for the front or rear part of the other vehicle
- B62D53/08—Fifth wheel traction couplings
- B62D53/0857—Auxiliary semi-trailer handling or loading equipment, e.g. ramps, rigs, coupling supports
- B62D53/0864—Dollies for fifth wheel coupling
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B62—LAND VEHICLES FOR TRAVELLING OTHERWISE THAN ON RAILS
- B62D—MOTOR VEHICLES; TRAILERS
- B62D53/00—Tractor-trailer combinations; Road trains
- B62D53/04—Tractor-trailer combinations; Road trains comprising a vehicle carrying an essential part of the other vehicle's load by having supporting means for the front or rear part of the other vehicle
- B62D53/08—Fifth wheel traction couplings
- B62D53/0807—Fifth wheel traction couplings adjustable coupling saddles mounted on sub-frames; Mounting plates therefor
Landscapes
- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Transportation (AREA)
- Mechanical Engineering (AREA)
- Vehicle Cleaning, Maintenance, Repair, Refitting, And Outriggers (AREA)
Abstract
"RETRACTABLE LANDING GEAR FOR TRAILERS"
ABSTRACT OF THE DISCLOSURE
A front trailer has a landing gear assembly mounted on sets of wheels connected to the rear end of the front trailer so that it can be retracted underneath the front trailer when the front trailer only is used or can be extended to the rear of the front trailer when a rear trailer is to be connected. The landing gear assembly has a fifth wheel com-ponent and the rear trailer is operatively connected to this component. The landing gear assembly includes a front portion situated under the front trailer and a convertor portion trans-versely hinged to the front portion for perpendicular hinging movement thereto.
ABSTRACT OF THE DISCLOSURE
A front trailer has a landing gear assembly mounted on sets of wheels connected to the rear end of the front trailer so that it can be retracted underneath the front trailer when the front trailer only is used or can be extended to the rear of the front trailer when a rear trailer is to be connected. The landing gear assembly has a fifth wheel com-ponent and the rear trailer is operatively connected to this component. The landing gear assembly includes a front portion situated under the front trailer and a convertor portion trans-versely hinged to the front portion for perpendicular hinging movement thereto.
Description
"~ETRACTABLE LANDING GEAR FOR TRAILERS"
BACKGROUND OF THE INVENTION
This invention relates to new and useful improve-ments in commercial trailers and the like normally pulled by a cab unit and connected to the cab unit by means of a fifth wheel assembly.
Conventionally, a second trailer is often connected to the ~irst trailer and ball hitches or the like are usually utilized to connect the two trailers together with of course the necessary safety equipment and means to connect the brake system of the cab to both of the trailersO
This conventional system of connecting one trailer to another suffers from several disadvantages. Firstly it is difficult to back up the two trailers when it is understood 1 15 that the first trailer itself is connected to a cab unit.
Secondly the conventional connection often results in sway occurring between the second and first trailers and if this is not controlled, it can be extremely dangerous to the point where such combination units may sway out of control.
Another disadvantage with the conventional connection is that when the second trailer is removed, the hitch assembly normally extends rearwardly of the first trailer thus making it difficult to back this trailer up to a dock and to be positioned ,~ ~
~g~9~
with the rear edge of the trailer contiguous with the front edge of the dock.
SUMMAR~ OF THE INVENTION
The present invention overcomes these disadvantages and in accordance with the invention there is provided in a trailer assembly which includes a front trailer and a selec-`' tively attachable rear trailerl said front trailer including a pair of spaced and parallel longitudinally extending chas-sis members; the improvement characterized by a landing gear assembly situated at the rear of said front trailer, means mounting said landing gear assembly to said front trailer for movement between a position underneath said ~ront trail-er and to a position extending behind said front trailer and vice versa, ground engaging wheels supporting said landing gear assembly, said landing gear assembly including a front portion underneath said front trailer and a convertor por-tion behind said front portion and means on said convertor po.rtion for detachably securing the second trailer thereto and means to detachably s~cure said landing gear assembly in either of said two positions; and a transverse hi.nge me-ans between said front portion and said convertor portion whereby said convertor portion is pivotally connected to said front portion for movement in a vertical plane.
. . ... : .~ . . .
:- . . , .. ., , .
: ............... : :: :
, ": ~ , Another aspect of the invention is to provide a device which reduces the tendency of the second trailer to sway relative to the first trailer.
A still further aspect of the invention is to provide : :
a landing gear assembly for connecting two trailers together in which the landing gear assembly can be completely retrac-ted when the second trailer is connected.
With the foregoing in view, and other advantayes as will become apparent to those skilled in the art to which this invention relates as this specification proceeds, my invention consists essentially in the arrangement and construction of par~s all as hereinafter more particularly described, reference being had to the accompanying drawings in which:
DESCRIPTION OF THE DRAWINGS
_ _ _ Figure 1 is a fragmentary isometric view of the as-sembly connected to a front trailer shown schematically, and being situated in the extended position.
Figure 2 is a view similar to Figure 1 but showing the landing gear assembly in the fully xetracted position.
Figure 3 is an enlarged cross sectional view showing one method of mounting the landing gear assembly to the chassis members of the front trailerO
Figure 4 is a side elevation reduced in scale from the rest of the drawings, showing two trailers connected toyether -: :, . ..
,. ~ . .
. ~ ~ .. ~ ,. :.
- , by the present invention.
Figure 5 is a vi.ew similar to Figure 4 bu-t showing the second trailer removed and the landing gear assembly fully retracted under the rear of the first trailer.
In the drawings like characters of reference indicate correspondins parts in the different figures.
DE~AILED DESCRI1?TION
Proceeding thereore to describe the invention in de-tail, re~erence should first ~e made to Figures 1 and 2 in which 10 illustrates generally, a front trailer shown schematically and including a pair of spaced and parallel longitudinally ex-tending chassis members 11 with a trailer floor 12 supported thereon and the body enclosure 13 being illustrated in fragmen-tary fashion.
The front end 14 of the front trailer 10 is adapted to be mounted upon a cab unit (not illustrated) by means of a con-ventional fifth wheel attachment ~not illustrated).
The rear of the front trailer 10 is supported upon a landing gear assembly collectively designated 15. This landing 2Q gear assembly includes a front portion collectively designated , .
` ~5- ~ ~9 ~
16 and a convertor portion collectively designated 17. Deal- :
ing first with the convertor portion 17 r it includes a pair of spaced and parallel frame members 18 supported in the de-sired position b~ rear transverse structure 19 extending be-tween the xear ends through the vertical members 20. A plat-form 21 extends between adjacent the rear ends of the frame members 18 and a conventional fifth wheel plate assembly 22 i5 supported upon this platform 21.
A pair of plates 23 are mounted on the front ends of the ~rame members 18 and pivot pins 24 extending through rubberized bushings 25, connec~. these plates 23 to transverse bearing members 23A extending from the rear of the front portion 16 thus mounting the convertor portion 17 to the front portion 16 for pivotal movement in a vertical plane around the axes of the pins 24.
It will noted that this mounting also prevents any side to side mo~ement of the convertor portion relative to the front portion 16 thus assisting in preventing side sway from occurrlng .
The front portion 16 consists of a pair of spaced and parallel channel frame members 26 shown specifically in Figure
BACKGROUND OF THE INVENTION
This invention relates to new and useful improve-ments in commercial trailers and the like normally pulled by a cab unit and connected to the cab unit by means of a fifth wheel assembly.
Conventionally, a second trailer is often connected to the ~irst trailer and ball hitches or the like are usually utilized to connect the two trailers together with of course the necessary safety equipment and means to connect the brake system of the cab to both of the trailersO
This conventional system of connecting one trailer to another suffers from several disadvantages. Firstly it is difficult to back up the two trailers when it is understood 1 15 that the first trailer itself is connected to a cab unit.
Secondly the conventional connection often results in sway occurring between the second and first trailers and if this is not controlled, it can be extremely dangerous to the point where such combination units may sway out of control.
Another disadvantage with the conventional connection is that when the second trailer is removed, the hitch assembly normally extends rearwardly of the first trailer thus making it difficult to back this trailer up to a dock and to be positioned ,~ ~
~g~9~
with the rear edge of the trailer contiguous with the front edge of the dock.
SUMMAR~ OF THE INVENTION
The present invention overcomes these disadvantages and in accordance with the invention there is provided in a trailer assembly which includes a front trailer and a selec-`' tively attachable rear trailerl said front trailer including a pair of spaced and parallel longitudinally extending chas-sis members; the improvement characterized by a landing gear assembly situated at the rear of said front trailer, means mounting said landing gear assembly to said front trailer for movement between a position underneath said ~ront trail-er and to a position extending behind said front trailer and vice versa, ground engaging wheels supporting said landing gear assembly, said landing gear assembly including a front portion underneath said front trailer and a convertor por-tion behind said front portion and means on said convertor po.rtion for detachably securing the second trailer thereto and means to detachably s~cure said landing gear assembly in either of said two positions; and a transverse hi.nge me-ans between said front portion and said convertor portion whereby said convertor portion is pivotally connected to said front portion for movement in a vertical plane.
. . ... : .~ . . .
:- . . , .. ., , .
: ............... : :: :
, ": ~ , Another aspect of the invention is to provide a device which reduces the tendency of the second trailer to sway relative to the first trailer.
A still further aspect of the invention is to provide : :
a landing gear assembly for connecting two trailers together in which the landing gear assembly can be completely retrac-ted when the second trailer is connected.
With the foregoing in view, and other advantayes as will become apparent to those skilled in the art to which this invention relates as this specification proceeds, my invention consists essentially in the arrangement and construction of par~s all as hereinafter more particularly described, reference being had to the accompanying drawings in which:
DESCRIPTION OF THE DRAWINGS
_ _ _ Figure 1 is a fragmentary isometric view of the as-sembly connected to a front trailer shown schematically, and being situated in the extended position.
Figure 2 is a view similar to Figure 1 but showing the landing gear assembly in the fully xetracted position.
Figure 3 is an enlarged cross sectional view showing one method of mounting the landing gear assembly to the chassis members of the front trailerO
Figure 4 is a side elevation reduced in scale from the rest of the drawings, showing two trailers connected toyether -: :, . ..
,. ~ . .
. ~ ~ .. ~ ,. :.
- , by the present invention.
Figure 5 is a vi.ew similar to Figure 4 bu-t showing the second trailer removed and the landing gear assembly fully retracted under the rear of the first trailer.
In the drawings like characters of reference indicate correspondins parts in the different figures.
DE~AILED DESCRI1?TION
Proceeding thereore to describe the invention in de-tail, re~erence should first ~e made to Figures 1 and 2 in which 10 illustrates generally, a front trailer shown schematically and including a pair of spaced and parallel longitudinally ex-tending chassis members 11 with a trailer floor 12 supported thereon and the body enclosure 13 being illustrated in fragmen-tary fashion.
The front end 14 of the front trailer 10 is adapted to be mounted upon a cab unit (not illustrated) by means of a con-ventional fifth wheel attachment ~not illustrated).
The rear of the front trailer 10 is supported upon a landing gear assembly collectively designated 15. This landing 2Q gear assembly includes a front portion collectively designated , .
` ~5- ~ ~9 ~
16 and a convertor portion collectively designated 17. Deal- :
ing first with the convertor portion 17 r it includes a pair of spaced and parallel frame members 18 supported in the de-sired position b~ rear transverse structure 19 extending be-tween the xear ends through the vertical members 20. A plat-form 21 extends between adjacent the rear ends of the frame members 18 and a conventional fifth wheel plate assembly 22 i5 supported upon this platform 21.
A pair of plates 23 are mounted on the front ends of the ~rame members 18 and pivot pins 24 extending through rubberized bushings 25, connec~. these plates 23 to transverse bearing members 23A extending from the rear of the front portion 16 thus mounting the convertor portion 17 to the front portion 16 for pivotal movement in a vertical plane around the axes of the pins 24.
It will noted that this mounting also prevents any side to side mo~ement of the convertor portion relative to the front portion 16 thus assisting in preventing side sway from occurrlng .
The front portion 16 consists of a pair of spaced and parallel channel frame members 26 shown specifically in Figure
2, braced by means of a cross member 27 and engaged under the longitudinally extending chassis members 11 of the front trailer.
, ~
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These longitudinal chassis members are preferably in the form of eye beams with a horizontal lower flange 28 which rests within the channel members 26, the open sides of which face upwardly as clearly illustrated.
S It is desirable that roller means be provided between the channel members 26 and ~he chassis memhers 11 and one form oE such roller means is illustrated in Figure 3.
Pairs of brackets 29 extend downwardly from each side flange 30A of the channel members 26 and a horizontally situated ; 10 roller 30 is journalled between the brackets 29, upon a mounting pin 31 extending between the bracket members. The roller ex-tends upwardly through a cut out portion 32 in the base of the channel members 26 so that the horizontal flange 28 of the chassis members 11 engages upon these rollers. The channel mem-bers maintain the front trailer unit within the channels so that the landing gear assembly 15 can move from the extended position shown in Figure 1, to the retracted position shown in Figure 2 and vise versa.
Means are provided to restrain the landing gear assem-bly in either of the two positions, said means taking the form of a latch plate 33 secured to each of the channel members 25 adja~
cent the front ends 34 thereof. It should be observed that only one of the latch plates 33 is shown in the accompanying drawings.
,.: . ~ , . . .
-,-- : . .
. : . .
~9~5~29 These latch plates include the rearwaxdly facin~
hook portions 35 which engage projecting pins or studs 36 ex-tending from a reinforcing plate 37 welded to the innex flange of the longitudinal chassis members 11. Locating pins 37 ex-tend from plates 38 welded to the vertical flanye of ~he chas-sis members 11 and prevent relative vertical movement betw~en the front trailer unit and the landing gear assembly 15.
It should be observed that a pair of ground engaging wheels collectively designated 39 mount the convextor portion 17, said whee~ assemblies being conventional and having brakes ~not illustrated) connected thereto.
Two pairs of ground engaging wheel assemblies 40 and 41 are secured to the front portion 16 o~ the landing gear as-sembly 15 adjacent the rear ends of the ~ro~t portion 16, These are mounted upon springs 42 in the usual way and also in-clude conventional brakes~ All of the brake assemblies are of course operatively connected to the cab assembly in the usual way. However as such details are conventional, it is not be-lieved necessary to describe same further~
2a When in the ully rekracted position, the pins 37' may be removed from the apertures within the plates 38 and re- ;
inserted through apertures formed in further plates 43 secured to the vertical flange of the chassis members just rearwardly . .. . .
,, . . ; ~ ~ , ~ -8- ~8~
of the plates 37'. The latch hooks 33 engage these pins when the landing gear assembly is in the fully retracted position shown in Figure 2.
When in the retracted position, it will be noted that the fifth wheel plate 22 engages under the floor 12 of the front trailer and between the longitudinal chassis members 11 thereof so that it is completely retracted thus leaving the rear end of the front trailer clear to enable it to be backed up to the front edge of a conventional landing dock.
In operation, and assuming that the landing gear as--sembly is in the retracted position shown in Figure 2, the pins 37' are removed from the latch hooks 33 and the apertures within plates 43. By chalking the wheels of the landing gear assembly, the front trailer together with the cab unit are driven forward thus extending the landing gear assembly to the position shown in Figure 1.
The second trailer 44 (shown schematically in Figures plate 4 and 5) is then engaged over the fifth wheel/22 in the usual manner and locked into position whereupon the double unit can be driv n and operated by the cab unit.
:~ When it is desired to remove the second trailer 44, the front is jacked up in the conventional manner and disconnect-,. ~, ; . :
":
- ,, .:
;s9~
ed from the fifth wheel plate 22 whereupon the wheels of the landing gear assembly may be chalked, and the fron~ trailer moved slowly rearwardly until the landing gear assembly is fully retracted as shown in Figure 2 whereupon pins 37' may be inser~ed within plates 43 so that they are engaged by the latch plates 33.
Finally it should be noted that as the frame members 18 pass under the rear end of the first trailer, transverse rollers 44~mounted at the rear end of the longitudinal chassis 10 members 11, engage the upper suxfaces 18A of the members 18 prevent any binding from occurring as these members pass under the chassis members during retraction and extension thereof.
It will therefore be seen that the landing gear assem-bly cannot only be retracted and extended as desired but also 15 gives adequate nonswaying suppoxt to the front trailer when used alone and to the rear trailer when extended as shown in Figure 4.
Finally it should be noted that additiona]. hook plate 33A may be secured to the side of the channel members 16 with an additional pin 36A extending from the frame member 11. This 20 gives additional support when the device is extended as in Figure 1 , ' ' :
~9~
~ince various modifications can be made in my inven-tion as hereinabove described, ancl many apparently widely dif-ferent embodiments of same made within the spirit and scope of the claims without departing from such spirit and scope, it is intended that all matter contained in the accompanying : specification shall be interpreted as illustrative only and not in a limiting sense.
.
, ,
, ~
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These longitudinal chassis members are preferably in the form of eye beams with a horizontal lower flange 28 which rests within the channel members 26, the open sides of which face upwardly as clearly illustrated.
S It is desirable that roller means be provided between the channel members 26 and ~he chassis memhers 11 and one form oE such roller means is illustrated in Figure 3.
Pairs of brackets 29 extend downwardly from each side flange 30A of the channel members 26 and a horizontally situated ; 10 roller 30 is journalled between the brackets 29, upon a mounting pin 31 extending between the bracket members. The roller ex-tends upwardly through a cut out portion 32 in the base of the channel members 26 so that the horizontal flange 28 of the chassis members 11 engages upon these rollers. The channel mem-bers maintain the front trailer unit within the channels so that the landing gear assembly 15 can move from the extended position shown in Figure 1, to the retracted position shown in Figure 2 and vise versa.
Means are provided to restrain the landing gear assem-bly in either of the two positions, said means taking the form of a latch plate 33 secured to each of the channel members 25 adja~
cent the front ends 34 thereof. It should be observed that only one of the latch plates 33 is shown in the accompanying drawings.
,.: . ~ , . . .
-,-- : . .
. : . .
~9~5~29 These latch plates include the rearwaxdly facin~
hook portions 35 which engage projecting pins or studs 36 ex-tending from a reinforcing plate 37 welded to the innex flange of the longitudinal chassis members 11. Locating pins 37 ex-tend from plates 38 welded to the vertical flanye of ~he chas-sis members 11 and prevent relative vertical movement betw~en the front trailer unit and the landing gear assembly 15.
It should be observed that a pair of ground engaging wheels collectively designated 39 mount the convextor portion 17, said whee~ assemblies being conventional and having brakes ~not illustrated) connected thereto.
Two pairs of ground engaging wheel assemblies 40 and 41 are secured to the front portion 16 o~ the landing gear as-sembly 15 adjacent the rear ends of the ~ro~t portion 16, These are mounted upon springs 42 in the usual way and also in-clude conventional brakes~ All of the brake assemblies are of course operatively connected to the cab assembly in the usual way. However as such details are conventional, it is not be-lieved necessary to describe same further~
2a When in the ully rekracted position, the pins 37' may be removed from the apertures within the plates 38 and re- ;
inserted through apertures formed in further plates 43 secured to the vertical flange of the chassis members just rearwardly . .. . .
,, . . ; ~ ~ , ~ -8- ~8~
of the plates 37'. The latch hooks 33 engage these pins when the landing gear assembly is in the fully retracted position shown in Figure 2.
When in the retracted position, it will be noted that the fifth wheel plate 22 engages under the floor 12 of the front trailer and between the longitudinal chassis members 11 thereof so that it is completely retracted thus leaving the rear end of the front trailer clear to enable it to be backed up to the front edge of a conventional landing dock.
In operation, and assuming that the landing gear as--sembly is in the retracted position shown in Figure 2, the pins 37' are removed from the latch hooks 33 and the apertures within plates 43. By chalking the wheels of the landing gear assembly, the front trailer together with the cab unit are driven forward thus extending the landing gear assembly to the position shown in Figure 1.
The second trailer 44 (shown schematically in Figures plate 4 and 5) is then engaged over the fifth wheel/22 in the usual manner and locked into position whereupon the double unit can be driv n and operated by the cab unit.
:~ When it is desired to remove the second trailer 44, the front is jacked up in the conventional manner and disconnect-,. ~, ; . :
":
- ,, .:
;s9~
ed from the fifth wheel plate 22 whereupon the wheels of the landing gear assembly may be chalked, and the fron~ trailer moved slowly rearwardly until the landing gear assembly is fully retracted as shown in Figure 2 whereupon pins 37' may be inser~ed within plates 43 so that they are engaged by the latch plates 33.
Finally it should be noted that as the frame members 18 pass under the rear end of the first trailer, transverse rollers 44~mounted at the rear end of the longitudinal chassis 10 members 11, engage the upper suxfaces 18A of the members 18 prevent any binding from occurring as these members pass under the chassis members during retraction and extension thereof.
It will therefore be seen that the landing gear assem-bly cannot only be retracted and extended as desired but also 15 gives adequate nonswaying suppoxt to the front trailer when used alone and to the rear trailer when extended as shown in Figure 4.
Finally it should be noted that additiona]. hook plate 33A may be secured to the side of the channel members 16 with an additional pin 36A extending from the frame member 11. This 20 gives additional support when the device is extended as in Figure 1 , ' ' :
~9~
~ince various modifications can be made in my inven-tion as hereinabove described, ancl many apparently widely dif-ferent embodiments of same made within the spirit and scope of the claims without departing from such spirit and scope, it is intended that all matter contained in the accompanying : specification shall be interpreted as illustrative only and not in a limiting sense.
.
, ,
Claims
WHAT I CLAIM AS MY INVENTION:
(1) In a trailer assembly which includes a front trailer and a selectively attachable rear trailer, said front trailer: including a pair of spaced and parallel longitudinally extending chassis members; the improvement characterized by a landing gear assembly situated at the rear of said front trailer, means mounting said landing year assembly to said front trailer for movement between a position underneath said front trailer and to a position extending behind said front trailer and vice versa, ground engaging wheels supporting said landing gear assembly, said landing gear assembly including a front portion underneath said front trailer and a convertor portion behind said front portion and means on said convertor portion for detachably securing the second trailer thereto and means to detachably secure said landing gear assembly in either of said two positions; and a transverse hinge means between said front portion and said convertor portion whereby said convertor portion is pivotally connected to said front portion for movement in a vertical plane.
(2) The improvement according to Claim 1 in which said front portion includes a pair of spaced and parallel frame members operatively connected to the chassis members of said front trailer, for mounting said landing gear as-sembly to said front trailer as aforesaid.
(3) The improvement according to Claim 1 which in-cludes at least one pair of ground engaging wheels support ing said convertor portion and at least two sets of wheels supporting said front portion.
(4) The improvement according to Claim 2 which in-cludes at least one pair of ground engaging wheels support=
ing said convertor portion and at least two sets of wheels supporting said front portion.
(5) The improvement according to Claims 1, 2 or 3 in which said means to detachably secure said landing gear assembly in either of said two positions includes a latch hook on each side of said landing gear assembly, pin means extending from said chassis members of said front trailer engageable by said latch hook when in the extended position and further means detachably extending from said front trailer forwardly of said pin means and engageable by said latch hooks when said landing gear assembly is in the re-tracted position, said latch hooks being situated on said front portion adjacent to the connection thereof to said convertor portion.
(6) The improvement according to Claim 4 in which said means to detachably secure said landing gear assembly in either of said two positions includes a latch hook on each side of said landing gear assembly, pin means extend-ing from said chassis members of said front trailer engage-able by said latch hook when in the extended position and further means detachably extending from said front trailer forwardly of said pin means and engageable by said latch hooks when said landing gear assembly is in the retracted position, said latch hooks being situated on said front portion adjacent to the connection thereof to said conver-tor position.
(1) In a trailer assembly which includes a front trailer and a selectively attachable rear trailer, said front trailer: including a pair of spaced and parallel longitudinally extending chassis members; the improvement characterized by a landing gear assembly situated at the rear of said front trailer, means mounting said landing year assembly to said front trailer for movement between a position underneath said front trailer and to a position extending behind said front trailer and vice versa, ground engaging wheels supporting said landing gear assembly, said landing gear assembly including a front portion underneath said front trailer and a convertor portion behind said front portion and means on said convertor portion for detachably securing the second trailer thereto and means to detachably secure said landing gear assembly in either of said two positions; and a transverse hinge means between said front portion and said convertor portion whereby said convertor portion is pivotally connected to said front portion for movement in a vertical plane.
(2) The improvement according to Claim 1 in which said front portion includes a pair of spaced and parallel frame members operatively connected to the chassis members of said front trailer, for mounting said landing gear as-sembly to said front trailer as aforesaid.
(3) The improvement according to Claim 1 which in-cludes at least one pair of ground engaging wheels support ing said convertor portion and at least two sets of wheels supporting said front portion.
(4) The improvement according to Claim 2 which in-cludes at least one pair of ground engaging wheels support=
ing said convertor portion and at least two sets of wheels supporting said front portion.
(5) The improvement according to Claims 1, 2 or 3 in which said means to detachably secure said landing gear assembly in either of said two positions includes a latch hook on each side of said landing gear assembly, pin means extending from said chassis members of said front trailer engageable by said latch hook when in the extended position and further means detachably extending from said front trailer forwardly of said pin means and engageable by said latch hooks when said landing gear assembly is in the re-tracted position, said latch hooks being situated on said front portion adjacent to the connection thereof to said convertor portion.
(6) The improvement according to Claim 4 in which said means to detachably secure said landing gear assembly in either of said two positions includes a latch hook on each side of said landing gear assembly, pin means extend-ing from said chassis members of said front trailer engage-able by said latch hook when in the extended position and further means detachably extending from said front trailer forwardly of said pin means and engageable by said latch hooks when said landing gear assembly is in the retracted position, said latch hooks being situated on said front portion adjacent to the connection thereof to said conver-tor position.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CA299,857A CA1098929A (en) | 1978-03-28 | 1978-03-28 | Retractable landing gear for trailers |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CA299,857A CA1098929A (en) | 1978-03-28 | 1978-03-28 | Retractable landing gear for trailers |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CA1098929A true CA1098929A (en) | 1981-04-07 |
Family
ID=4111086
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CA299,857A Expired CA1098929A (en) | 1978-03-28 | 1978-03-28 | Retractable landing gear for trailers |
Country Status (1)
| Country | Link |
|---|---|
| CA (1) | CA1098929A (en) |
Cited By (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4400004A (en) * | 1981-08-20 | 1983-08-23 | Arguin Trailer Frame, Inc. | Tandem trailer system |
| US4526395A (en) * | 1981-08-20 | 1985-07-02 | Gerard Arguin | Tandem trailer system |
| US4598924A (en) * | 1981-08-20 | 1986-07-08 | Arguin Trailer Frame, Inc. | Tandem trailer system |
| US4600210A (en) * | 1985-05-14 | 1986-07-15 | Mcmurray Wade G | Tandem trailer dolly |
| US4673191A (en) * | 1981-08-20 | 1987-06-16 | Arguin Trailer Frames, Inc. | Tandem trailer system |
| FR2611640A1 (en) * | 1987-02-24 | 1988-09-09 | Actm | Device for increasing the loading capacity of towing vehicles so as to receive semi-trailers for transporting heavy loads |
| WO2015042169A1 (en) * | 2013-09-17 | 2015-03-26 | Banwart Donald D | Powered converter dolly and securing device |
| US9126644B2 (en) | 2009-09-30 | 2015-09-08 | Donald D. Banwart | Powered converter dolly and securing device |
| US10787184B2 (en) | 2017-04-06 | 2020-09-29 | Twenty-First Century Transportation Systems, Inc,. | Intermodal transportation system including guide rails and autonomous transport dollies |
-
1978
- 1978-03-28 CA CA299,857A patent/CA1098929A/en not_active Expired
Cited By (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4400004A (en) * | 1981-08-20 | 1983-08-23 | Arguin Trailer Frame, Inc. | Tandem trailer system |
| US4526395A (en) * | 1981-08-20 | 1985-07-02 | Gerard Arguin | Tandem trailer system |
| US4598924A (en) * | 1981-08-20 | 1986-07-08 | Arguin Trailer Frame, Inc. | Tandem trailer system |
| US4673191A (en) * | 1981-08-20 | 1987-06-16 | Arguin Trailer Frames, Inc. | Tandem trailer system |
| US4600210A (en) * | 1985-05-14 | 1986-07-15 | Mcmurray Wade G | Tandem trailer dolly |
| FR2611640A1 (en) * | 1987-02-24 | 1988-09-09 | Actm | Device for increasing the loading capacity of towing vehicles so as to receive semi-trailers for transporting heavy loads |
| US9126644B2 (en) | 2009-09-30 | 2015-09-08 | Donald D. Banwart | Powered converter dolly and securing device |
| WO2015042169A1 (en) * | 2013-09-17 | 2015-03-26 | Banwart Donald D | Powered converter dolly and securing device |
| US10787184B2 (en) | 2017-04-06 | 2020-09-29 | Twenty-First Century Transportation Systems, Inc,. | Intermodal transportation system including guide rails and autonomous transport dollies |
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