GB2116501A - Retractable support device for a vehicle trailer - Google Patents
Retractable support device for a vehicle trailer Download PDFInfo
- Publication number
- GB2116501A GB2116501A GB08207559A GB8207559A GB2116501A GB 2116501 A GB2116501 A GB 2116501A GB 08207559 A GB08207559 A GB 08207559A GB 8207559 A GB8207559 A GB 8207559A GB 2116501 A GB2116501 A GB 2116501A
- Authority
- GB
- United Kingdom
- Prior art keywords
- vehicle trailer
- leg part
- leg
- support
- 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.)
- Withdrawn
Links
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60S—SERVICING, CLEANING, REPAIRING, SUPPORTING, LIFTING, OR MANOEUVRING OF VEHICLES, NOT OTHERWISE PROVIDED FOR
- B60S9/00—Ground-engaging vehicle fittings for supporting, lifting, or manoeuvring the vehicle, wholly or in part, e.g. built-in jacks
- B60S9/02—Ground-engaging vehicle fittings for supporting, lifting, or manoeuvring the vehicle, wholly or in part, e.g. built-in jacks for only lifting or supporting
- B60S9/04—Ground-engaging vehicle fittings for supporting, lifting, or manoeuvring the vehicle, wholly or in part, e.g. built-in jacks for only lifting or supporting mechanically
- B60S9/06—Ground-engaging vehicle fittings for supporting, lifting, or manoeuvring the vehicle, wholly or in part, e.g. built-in jacks for only lifting or supporting mechanically of screw-and-nut type
- B60S9/08—Ground-engaging vehicle fittings for supporting, lifting, or manoeuvring the vehicle, wholly or in part, e.g. built-in jacks for only lifting or supporting mechanically of screw-and-nut type the screw axis being substantially vertical
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Vehicle Cleaning, Maintenance, Repair, Refitting, And Outriggers (AREA)
Abstract
A vehicle trailer retractable support device includes a telescopic support leg (1) having a hollow elongated first part pivotably securable, at or adjacent one end (1a), to a vehicle trailer (3) with an open end (16) thereof lowermost and with a second elongated leg part (8); having a foot 25, slidably mounted in the first leg part to project from the open end (16) thereof, drive means for extending the second leg part (8) into a support position or retracting it into a non-support position relative to the first leg part, at least one elongated steadying stay means (30) pivotally connected at one end (30a) to the first leg part intermediate the ends thereof or at the open end (16) and a removable and replaceable shear pin (31) for connecting the other end (30b) of the stay means to the vehicle trailer (3) in a manner such that, with the device operatively secured to a vehicle trailer in the retracted non- support position, severe impact on the foot means (25) in the general direction from front to rear of the trailer would cause the pin (31) to shear and the support leg (1) to pivot rearwardly and upwardly from the impact with respect of the vehicle trailer undersurface to minimize damage of the support leg (1) and foot mean (25). <IMAGE>
Description
SPECIFICATION
Retractable support device for a vehicle trailer
This invention relates to a retractable support device for a vehicle trailer.
Conventional vehicle trailer support devices usually consist of a pair of telescopic legs located one at each side of a leading portion of the trailer and operable manually to extend or retract to vary the height of the leading end of the trailer to permit coupling or uncoupling from a vehicle tractor unit. Generally such support legs are wheeled or provided with foot plates for contact with the ground to support the uncoupled trailer end relative to the ground. When the vehicle has been coupled to the trailer the telescopic support legs are retracted into a non-support position out of contact with the ground.
As it generally is necessary to retract and extend the telescopic support legs manually in conventional trailer support devices the operator sometimes finds the support legs difficult to retract manually with the result that they are left only partially retracted. This can result in the partially retracted legs being struck violently on the lowermost ends thereof by contact with the ground when the vehicle is traversing rough ground with consequent damage to the ends of the support legs. In certain instances this damage can be sufficiently serious to prevent the support devices being operated and this results in loss of use of the vehicle trailer and the need for expensive repair to be carried out to the support device.
Although motor driven support devices have been proposed they have generally suffered from the disadvantage of being unduly complex and expensive and whilst they may remove the problem of lack of strength or care on the part of the operator when retracting the support devices they do not offer any solution to the problem of impact damage to the lower ends of the telescopic support legs. This problem is increased when only a single support leg is utilized.
Whilst in the latter case it has been proposed to make the lowermost end of the telescopic support leg pivotable under impact, either against a spring biassing force or by shearing a replaceable pin, this proposal has only been of limited effectiveness.
For example, because the major portion of the telescopic support leg remains fixedly dependent from the vehicle trailer, even when the lowermost end has been pivoted upwardly after impact with uneven or rough ground, it can itself be hit by an obstruction or rough ground causing severe damage to the leg itself and possibly even to the vehicle trailer. Therefore such a proposed pivoting lowermost end support leg is generally restricted in use to relatively even ground with consequent limited usefulness.
There is thus a need for a generally improved retractable support device for a vehicle trailer which is easy to operate and minimizes the risk of impact damage to the device by inadvertent contact with the ground or with an obstruction.
According to the present invention there is provided a retractable support device for a vehicle trailer, including a telescopic support leg having a hollow elongated first part pivotably securable, at or adjacent one end, to a leading portion of a vehicle trailer to depend therefrom with an open end thereof lowermost and having a second elongated leg part slidably mounted in the first leg part to project from the open end thereof, drive means extending the second leg part into a support position or retracting it into a on-support position relative to the first leg part, foot means fixedly attached to the end of the second end leg part projecting from the first leg part, at least one elongated steadying stay means pivotally connected at one end to the first leg part intermediate the ends thereof or at the open end, and a removable and replaceable shear pin for connecting the other end of the stay means to the vehicle trailer in a manner such that, with the device operatively secured to a vehicle trailer in the retracted non-support position, severe impact on the foot means in the general direction from front to rear of the trailer would cause the pin to shear and the support leg to pivot rearwardly and upwardly from the impact with respect of the vehicle trailer under-surface to minimize damage of the support leg and foot means.
Preferably the first leg part is pivotably securable to a vehicle trailer in a manner such as to be pivotable about an axis substantially horizontal and transverse to the longitudinal axis of the vehicle trailer.
The first and second leg parts may have a square or rectangular cross-section.
Advantageously the telescopic support leg includes an elongated screw, rotatably attached to and extending longitudinally in the first leg part, engaging a captive nut fixedly attached to the second leg part, so that rotation of the screw in one or other direction causes the nut to move along the screw and thus the second leg part to extend into the support position or retract into the non-support position.
The drive means for extending or retracting the second leg part advantageously includes a gearbox drivingly connected to the screw adjacent the first leg part end pivotally securable to the vehicle trailer and a reversible air driven rotary drive unit connectible to an input side of the gearbox and to a source of air under pressure and operable to rotate the screw via the gearbox.
Preferably the rotary drive unit and the gearbox are located substantially perpendicular to the longitudinal axis of the screw, advantageously fixedly secured to one side of the first leg part, for pivotal movement therewith. The gearbox may include a hand drive unit connectible to an input side thereof.
Conveniently the stay means is located rearwardly of the support leg with respect to the normal direction of movement of the vehicle trailer. The shear pin may be in the form of a bolt pivotally connecting one end of a link to the vehicle trailer with the other end of the stay means being pivotally connected to the other end of the link. The device may include more than one such stay means and shear pin. Conveniently the link is partially locatable in a channel fixedly securable to the vehicle trailer and the shear pin is attachable to the channel such that when, in operation of the device, the pin shears the link is slidable rearwardly of the vehicle trailer in the channel as the support leg pivots rearwardly and upwardly.
Conveniently the foot means has three legs extending in the form of a tripod and located such that two legs extend transversely of the vehicle trailer and one leg extends rearwardly of the vehicle trailer when the device is operatively secured to a vehicle trailer. Advantageously each leg may be fitted with a pivotal foot plate or shoe for adjusting the foot means to uneven ground.
Conveniently the foot means is shaped to be retractable over the open end of the first leg part.
Preferably only one retractable support device of the invention is associated with and secured to a vehicle trailer at the front end thereof but it is to be understood that the invention also contemplates the provision of two such devices for a vehicle trailer arranged in spaced apart location at the leading end portion of the trailer with one at or adjacent each side thereof.
For a better understanding of the present invention and to show how the same may be carried into effect, reference will now be made, by way of example, to the accompanying drawings in which:
Figure 1 is a side view of a part of a retractable support device according to one embodiment of the invention shown in operative association with part of a vehicle trailer,
Figure 2 is a view taken in the direction of the arrow A in Figure 1,
Figure 3 is a cross-sectional view from above taken on the line Il-Il of Figure 2,
Figure 4 is a part sectional view, to an enlarged scale, of a detail of Figure 1 taken on the line lV-lV of Figure 1,
Figure 5 is a part vertical sectional view of the upper end of a telescopic support leg of the device of Figure 1, to an enlarged scale, taken in the direction of the arrow A in Figure 1, and
Figure 6 is a view from above taken in the direction of the arrow B of Figure 5.
A retractable support device according to one embodiment of the invention, as shown in the accompanying drawings, is intended for attachment to a vehicle trailer. Although, for the sake of convenience, the invention will be described in terms of a single retractable support device, it is, to be understood, that two such support devices may be provided if necessary.
The illustrated retractable support device includes a telescopic support leg 1 with a hollow elongated first leg part 2 pivotably securable at or adjacent one end 1 a to a leading portion of a vehicle trailer 3 to depend therefrom with an open end 1 b thereof lowermost. As shown in Figure 2 the end 1 a of the leg 1 may be pivotally secured by means of a tubular sleeve 4 pivotally mounted on a tubular shaft 5 fixedly secured between longitudinally frame members or bearers 6 of the vehicle trailer 3 such that the sleeve 4 and shaft 5 extend substantially horizontally transverse to the longitudinal axis of the vehicle trailer 3 with the first leg part 2 depending substantially vertically therefrom substantially in the centre of the width of the vehicle trailer 3 as shown in Fig. 2.
Conveniently elongated stay members 7 may be provided as shown in Figure 2 connected between the sleeve 4 and first leg part 2 substantially as 450 thereto to provide lateral stiffness and stability for the sleeve 4 and first leg part 1 relative to the sleeve 5.
The support leg 1 additionally includes a second elongated leg part 8 slidably mounted in the first leg part 2 to project from the open end 1 a thereof. Conveniently as shown in the drawings the leg parts 2 and 8 have a rectangular or square cross-section to assist in slidably supporting the second leg part 8 within the first leg part 2.
The telescopic support leg 1 includes an elongated screw 9 rotatably attached to and extending longitudinally in the first leg part 2 so that one end 9a of the screw 9 is journaled in a bearing 10 in the end 1 a of the first leg part 2 and rotatably projects through a fixed mounting plate
1 1 in the end 1 a of the first leg part 2 into fixed engagement with a crown wheel 12 carried on the end 9a of the screw 9 as shown in Figures 5 and 6.
The other end of the elongated screw 9 passes through the open upper end of the second legs part 8 and engages in a captive nut 13 fixedly carried by the upper end of the second leg part 8.
The lowermost end of the screw 9 is rotatably located in a spacer bearing (not shown) located within the second leg part 8. Thus rotation of the screw 9 in either direction from drive imparted to the crown crown wheel 12 by means later described, causes the nut 13 to move along the screw and thus the second leg part 8 to extend into a support position or retract into a nonsupport position relative to the first leg part 2 and trailer 3.
The retractable support device also includes drive means for extending or retracting the second leg part 8 relative to the first leg part 2. This drive means includes a gearbox 14 drivingly connected to the screw 9 via the crown wheel 12. To this end the gearbox 14 includes a pair of parallel shafts with the first shaft 15 carrying a worm wheel 16 in a manner such that the worm wheel is fixed to the shaft 1 5 for rotation therewith but the shaft 1 5 is axially slidable to a limited extent within the worm wheel 16 by means of a splined intermediate sleeve connection 17. As shown in
Figures 5 and 6 the shaft 15 is slidably and rotatably journaled at one end in a wall of the first leg part 2, slidably journaled intermediate its end in the sleeve connection 17 and slidably and rotatively journaled at its opposite end 1 5a in an outer casing wall part of the gearbox 14. Between the worm wheel 16 and the end 1 5a the first shaft 15 carries two axially spaced gear wheels fixedly secured thereto for rotation therewith. One of these gear wheels 1 8a is larger iri diarneter than the other 1 8b and are intended to mesh one or the other with one or other of a pair of similar gear wheels of which one 19a is smaller than the other
19b. The gear wheels 19a and 1 9b are housed within the casing of the gearbox 14 and fixedly secured, for rotation therewith, to the second shaft 20. This shaft 20 is rotatively journaled at one end 20a in an inner wall of the gearbox 14 and rotatively journaled adjacent its other end 20b in the outermost wall of the gearbox 14.Drive is transmitted to the shaft 20 at either end thereof as will be hereinafter described, and from thence to the shaft 15, worm wheel 16 and crown wheel 12 to the screw 9 to displace the second leg part 8 upwardly or downwardly as required.
Thus the shaft 15 is axially displaceable to provide the gearbox 14 with two drive ratios. In the outermost position of the shaft 15 with respect to the crown wheel 12 the large gear wheel 1 8a is in mesh with the small gear wheel 1 9a of the shaft 20 and the drive ratio is a low ratio. In this position the gear wheels 18b and 19b do not engage. When the shaft 15 is displaced axially inwardly with respect to the crown wheel 12 the gear wheels 18a and 19a come out of mesh with one another and the small gear wheel 18b on the shaft 15 meshes with the large gear wheel 19b on the shaft 20 so that drive is transmitted from the shaft 20 via the meshing gear wheels 18b and 19b to the shaft 1 5, worm wheel 16 and crown wheel 12 to rotate the screw 9. In this position the gearbox operates in a high drive ratio.
As shown in Figures 5 and 6 of the accompanying drawings the drive shaft 20 can be driven from either end thereof. To this end the outer end 20b of the drive shaft 20 is engageable by means of an axially displaceable coupling or clutch 21 with the output shaft of a reversible rotary drive unit 22 attached to the outermost wall of the gearbox 14. Preferably, as illustrated, this rotary drive unit is a reversible air driven motor such as a vane motor or piston motor connectible to a source of air under pressure such as the air lines provided on the tractor unit, conveniently in the form of the secondary breaking lines.
Advantageously, as shown, this rotary drive unit 22 is located with its drive line transverse to the rotational axis of the screw 9. The coupling or clutch 21 may function in any desired manner and in the illustrated embodiment may be in interengaging hexagonal nut and socket with the socket being axially displaceable on and connected via splines 2, the output shaft of the drive unit 22.
Alternatively the reversible rotary drive unit 22 may be an electric motor driving an hydraulic pump to turn the gears 19a or 19b. Such an electric motor can be driven from the electric circuit of the tractor unit.
The end 20a of the shaft 20 is adapted to be turned manually to retract or extend the second leg part 8 for use if the rotary drive unit 22 should
be inoperative for any reason. To this end a stub
axle 23 is provided engageable, either fixedly or
via a clutch, with the end 20a of the shaft 20 for
rotation to transmit drive thereto. This stub axle
23 is journaled intermediate its ends in a journal
24 fixedly secured to one side of the first leg part
2 opposite to that of the gearbox 14, as shown in
Figures 5 and 6 of the drawings. The outermost
end 23a of the stub axle 23 is rotatable manually
in any convenient manner, for example, by means
of a handle removably drivingly attachable to the
end 23a by means of hexagonal flats provided on
the end 23a.Of course, as can be seen in the
accompanying drawings, the drive unit 22,
gearbox 14, stub axle 23, worm wheel 16 and
crown wheel 12 are all carried on the end 1 a of
the first leg part 2 and will pivot with the support
leg 1 about the tubular shaft 5.
The retractable support device of the invention
also includes foot means generally indicated at 25 fixedly attached to the outermost end of the second leg part 8 opposite to the end thereof attached to the screw 9. This foot means 25 has three legs 26 arranged in the form of a tripod and located such that two legs 26 extend substantially transversely with respect to the vehicle trailer and one leg 26 extends substantially rearwardly with respective to the vehicle trailer. This arrangement of legs 26 is preferred to provide the maximum support for the trailer on the ground, but it is to be understood that any other number and arrangement of legs can be utilized as desired or even a circular or part circular plate in place of the legs.Each of the legs 26 is provided with a foot plate or shoe 27 conveniently pivotally connected thereto by a shaft 28 to accommodate variation in level of the ground. These legs 26 conveniently, as shown, are attached to a frame or cage structure 29 shaped to be retractable over the open end 1 b of the first leg part 2.
With the device of the invention operatively, pivotally, mounted on the vehicle trailer 3 via the transverse tubular shaft 5, it is held in a substantially vertical position with respect to the trailer 3, against pivoting about the shaft 5, by at least one elongated steadying stay means 30 also forming part of the device of the invention. This stay means 30 is in the form of a stay or strut and is pivotally connected at one end 30a to the first leg part 2 intermediate the ends thereof, or (not shown) at the open end 1 b. The device also includes a removable and replaceable shear pin 31, conveniently a standard 3 inch diameter bolt which will shear under a load of 9 2 tonnes.This shear pin 31, as shown in Figures 1 and 4, connects the other end 30b of the stay means to the vehicle trailer 3 in a manner such that, with the device operatively secured to a vehicle trailer in the retracted non-support position, a severe impact on the foot means 25 in the general direction from front to rear of the trailer would cause the pins 31 to shear and the support leg 1 to pivot rearwardly and upwardly from the impact with respect to the vehicle trailer under surface to minimize damage to the support leg 1 and foot means 25. The first leg part 2, as illustrated, is pivotally securable horizontal and transverse to the longitudinal axis of the vehicle trailer.
As shown in Figures 1 and 4 the stay means 30 is located rearwardly of the support leg 1 with respect to the normal direction of movement to the vehicle trailer 3. A link 32 is provided and the shear pin 31 pivotally connects one end of the link 32 to the vehicle trailer 3 with the other end 30b of the stay means 30 being pivotally connected to the other end of the link. As illustrated a channel 33 is provided attachable to the under surface of the vehicle trailer 3 in the direction of the longitudinal axis thereof. This channel 33 conveniently is in the form of a hollow box section with a downwardly opening slot 33a through which the link 32 projects.The end of the link projecting through the slot 33a into the interior of the channel 33 is provided with an enlarged head portion 32a which is transversely bored to accommodate the pin 31 which passes through aligned bores in the side walls of the channel 33.
In this way the pin 31, which may be a bolt, secures the link 32 pivotally to the channel 33 which in turn is secured rigidly to the vehicle trailer 3. Thus when any impact occurs on the support leg 1 in a direction rearwardly of the vehicle trailer 3 it is transmitted via the stay means 30 and link 32 to the shear pin 31.If this impact is sufficient to shear the pin 31 then the link 32 is thereby freed from a fixed pivotal connection to the channel 33 by the bolt 31 and the enlarged head portion 32a slides rearwardly in the channel 33 to the extent permitted by the length of the slot 33a accompanied by the stay means 30 and thereby allows the support leg 1 and the gearbox 14, drive unit 22 and manual drive stub axle 23 to pivot about the tubular shaft 5 rearwardly upwardly towards the under surface of the vehicle trailer 3 out of contact with the obstruction or ground roughness producing the otherwise damaging impact on the support 1 or foot means 25.If desired means may be provided to retain the support leg 1 in the upwardly pivoted position for subsequent return to a substantially vertical position when desired and re-engagement of a fresh shear pin 31 through the aligned channel apertures and bore in the enlarged head portion 32a of the link 32 to secure the support leg 1 in the substantially vertical position once again. Although the device of the invention has been shown as including only one stay means 30 and shear pin 31 it may, of course, include more than one stay means 30 and shear pin 31 and more than one such channel 33. Although the shear pin 31 has been shown as a bolt secured to the channel 33 by a bolt head and nut is may of course alternatively be a pin with an enlarged head secured at the other ends by means of a split pin passing through an appropriate radial bore in the shear pin end.
The components on the retractable support device of the invention can be made from any suitable material, particularly metal, such as alloy or mild steel and connected together in any convenient manner such as by welding, brazing, bolting or riveting.
Construction of the retractable support device of the invention makes is particularly suitable for easy attachment to and removal from an existing trailer as the whole device merely requires attachment of the tubular shaft 5 between the longitudinal bearers or frame members of the vehicle trailer and the attachment of the channel 33 to the trailer. As the whole support leg 1, gearbox 14, drive unit 22 and foot means 25 are pivotable about the tubular shaft 5 as one unit on impact the risk of damage occurring on impact to the gearbox, driving unit and indeed to the support leg and elongated screw 9 is minimized.
Claims (17)
1. A retractable support device for a vehicle trailer, including a telescopic support leg having a hollow elongated first part pivotably securable, at or adjacent one end, to a leading portion of a vehicle trailer to depend therefrom with an open end thereof lowermost and having a second elongated leg part slidably mounted in the first leg part to project from the open end thereof, drive means for extending the second leg part into a support position or retracting it into a non-support position relative to the first leg part, foot means fixedly attached to the end of the second end leg part projecting from the first leg part, at least one elongated steadying stay means pivotally connected at one end to the first leg part intermediate the ends thereof or at the open end, and a removable and replaceable shear pin for connecting the other end of the stay means to the vehicle trailer in a manner such that, with the device operatively secured to a vehicle trailer in the retracted non-support position, severe impact on the foot means in the general direction from front to rear of the trailer would cause the pin to shear and the support leg to pivot rearwardly and upwardly from the impact with respect of the vehicle trailer undersurface to minimise damage of the support leg and foot means.
2. A device according to claim 1, wherein the first leg part securable to a vehicle trailer in a manner such as to be pivotable about an axis substantially horizontal and transverse to the longitudinal axis of the vehicle trailer.
3. A device according to claim 1 or claim 2, wherein the first and second leg parts have a square or rectangular cross-section.
4. A device according to any one of claims 1 to 3, wherein the telescopic support legs includes an elongated screw, rotatably attached to and extending longitudinally in the first leg part, engaging a captive nut fixedly attached to the second leg part, so that rotation of the screw in one or other direction causes the nut to move along the screw and thus the second leg part to extend into the support position or retract into the non-support position.
5. A device according to claim 4, wherein the drive means for extending or retracting the second leg part includes a gearbox drivingly connected to the screw adjacent the first leg part end pivotally securable to the vehicle trailer and reversible air driven rotary drive unit connectible to an input side of the gearbox and to a source of air under pressure and operable to rotate the screw via the gearbox.
6. A device according to claim 5, wherein the rotary drive unit and the gearbox are located substantially perpendicular to the longitudinal axis of the screw and fixedly secured to one side of the first leg part for pivotal movement therewith.
7. A device according to claim 5 or claim 6, wherein the gearbox includes a hand drive unit connectible to an input side thereof.
8. A device according to any one of claims 1 to 7, wherein the stay means is located rearwardly of the support leg with respect to the normal direction of movement of the vehicle trailer.
9. A device according to any one of claims 1 to 8, wherein the shear pin is in the form of a bolt pivotally connecting one end of a link to the vehicle trailer with the other end of the stay means being pivotally connected to the other end of the link.
10. A device according to any one of claims 1 to 9, including more than one such stay means and shear pin.
11. A device according to any one of claims 1 to 10, wherein the link is partially locatable in a channel fixedly securable to the vehicle trailer and the shear pin is attachable to the channel such that when, in operation of the device, the pin shears the link is slidably rearwardly of the vehicle trailer in the channel as the support leg pivots rearwardly and upwardly.
12. A device according to any one of claims 1 to 11, wherein the foot means has three legs extending to form a tripod and located such that two legs extend transversely of the vehicle trailer and one legs extends rearwardly of the vehicle trailer when the device is operatively secured to a vehicle trailer.
13. A device according to claim 12, wherein each leg is fitted with a pivotal foot plate or shoe for adjusting the foot means to uneven ground.
14. A device according to any one of claims 1 to 13, wherein the foot means is shaped to be retractable over the open end of the first leg part.
15. A retractable support device for a vehicle trailer, substantially as hereinbefore described with reference to the accompanying drawings.
16. A vehicle trailer having a single device according to any one of claims 1 to 15 secured thereto at the front end thereof.
17. A vehicle trailer having two devices according to any one of claims 1 to 15, arranged spaced apart location at the leading end portion of the trailer with one at or adjacent each side thereof.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| GB08207559A GB2116501A (en) | 1982-03-16 | 1982-03-16 | Retractable support device for a vehicle trailer |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| GB08207559A GB2116501A (en) | 1982-03-16 | 1982-03-16 | Retractable support device for a vehicle trailer |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| GB2116501A true GB2116501A (en) | 1983-09-28 |
Family
ID=10529015
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| GB08207559A Withdrawn GB2116501A (en) | 1982-03-16 | 1982-03-16 | Retractable support device for a vehicle trailer |
Country Status (1)
| Country | Link |
|---|---|
| GB (1) | GB2116501A (en) |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP0179632A2 (en) * | 1984-10-23 | 1986-04-30 | Philip Victor Busby | Power operated support or landing legs |
| WO1999054178A3 (en) * | 1998-04-21 | 1999-12-23 | Chapman Neil Anthony | Landing legs for trailers |
| CN112693434A (en) * | 2021-01-11 | 2021-04-23 | 曼祥(福建)科技发展有限公司 | Telescopic device for driving engineering machinery supporting leg |
| CN115028117A (en) * | 2022-06-10 | 2022-09-09 | 湖南中联重科智能高空作业机械有限公司 | Stabilizing device and engineering vehicle |
| CN116674511A (en) * | 2023-06-13 | 2023-09-01 | 河北览众专用汽车制造有限公司 | Intelligent balance adjusting device based on car as a house lifting support system |
-
1982
- 1982-03-16 GB GB08207559A patent/GB2116501A/en not_active Withdrawn
Cited By (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP0179632A2 (en) * | 1984-10-23 | 1986-04-30 | Philip Victor Busby | Power operated support or landing legs |
| EP0179632A3 (en) * | 1984-10-23 | 1987-05-27 | Philip Victor Busby | Power operated support or landing legs |
| AU591073B2 (en) * | 1984-10-23 | 1989-11-30 | Philip Victor Busby | Power operated support or landing legs |
| WO1999054178A3 (en) * | 1998-04-21 | 1999-12-23 | Chapman Neil Anthony | Landing legs for trailers |
| CN112693434A (en) * | 2021-01-11 | 2021-04-23 | 曼祥(福建)科技发展有限公司 | Telescopic device for driving engineering machinery supporting leg |
| CN115028117A (en) * | 2022-06-10 | 2022-09-09 | 湖南中联重科智能高空作业机械有限公司 | Stabilizing device and engineering vehicle |
| CN115028117B (en) * | 2022-06-10 | 2023-04-25 | 湖南中联重科智能高空作业机械有限公司 | Stabilizing device and engineering vehicle |
| CN116674511A (en) * | 2023-06-13 | 2023-09-01 | 河北览众专用汽车制造有限公司 | Intelligent balance adjusting device based on car as a house lifting support system |
| CN116674511B (en) * | 2023-06-13 | 2023-11-14 | 河北览众专用汽车制造有限公司 | Intelligent balance adjusting device based on car as a house lifting support system |
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