GB2252759A - Improvements in or relating to handling of loads - Google Patents
Improvements in or relating to handling of loads Download PDFInfo
- Publication number
- GB2252759A GB2252759A GB9103124A GB9103124A GB2252759A GB 2252759 A GB2252759 A GB 2252759A GB 9103124 A GB9103124 A GB 9103124A GB 9103124 A GB9103124 A GB 9103124A GB 2252759 A GB2252759 A GB 2252759A
- Authority
- GB
- United Kingdom
- Prior art keywords
- load
- engaging means
- mounting
- load engaging
- relative
- 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- Withdrawn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
- B66—HOISTING; LIFTING; HAULING
- B66C—CRANES; LOAD-ENGAGING ELEMENTS OR DEVICES FOR CRANES, CAPSTANS, WINCHES, OR TACKLES
- B66C1/00—Load-engaging elements or devices attached to lifting or lowering gear of cranes or adapted for connection therewith for transmitting lifting forces to articles or groups of articles
- B66C1/10—Load-engaging elements or devices attached to lifting or lowering gear of cranes or adapted for connection therewith for transmitting lifting forces to articles or groups of articles by mechanical means
- B66C1/62—Load-engaging elements or devices attached to lifting or lowering gear of cranes or adapted for connection therewith for transmitting lifting forces to articles or groups of articles by mechanical means comprising article-engaging members of a shape complementary to that of the articles to be handled
- B66C1/625—Load-engaging elements or devices attached to lifting or lowering gear of cranes or adapted for connection therewith for transmitting lifting forces to articles or groups of articles by mechanical means comprising article-engaging members of a shape complementary to that of the articles to be handled for gripping drums or barrels
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B66—HOISTING; LIFTING; HAULING
- B66C—CRANES; LOAD-ENGAGING ELEMENTS OR DEVICES FOR CRANES, CAPSTANS, WINCHES, OR TACKLES
- B66C1/00—Load-engaging elements or devices attached to lifting or lowering gear of cranes or adapted for connection therewith for transmitting lifting forces to articles or groups of articles
- B66C1/10—Load-engaging elements or devices attached to lifting or lowering gear of cranes or adapted for connection therewith for transmitting lifting forces to articles or groups of articles by mechanical means
- B66C1/42—Gripping members engaging only the external or internal surfaces of the articles
- B66C1/425—Gripping members engaging only the external or internal surfaces of the articles motor actuated
- B66C1/427—Gripping members engaging only the external or internal surfaces of the articles motor actuated by hydraulic or pneumatic motors
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Load-Engaging Elements For Cranes (AREA)
Abstract
A drum 12 can be raised and lowered with its centre of gravity G being beneath a freely suspended mounting 18. The drum can also be tilted by hydraulic actuators 24 and 26 to a position in which its longitudinal axis extends generally horizontally. When a drum is deposited with its longitudinal axis extending horizontally, the weight of the drum is taken off the tines 22 and a spring (14, Fig 4, not shown) urges the head frame 36 to the left and upwardly in order that the centre of gravity of the apparatus (without the drum) can remain beneath the mounting 18 in order that the tines remain generally horizontal. Two shorter tines 20 are movable towards or away from the tines 22 to engage or disengage a drum by actuator 28. The tines are mounted from the mounting 18 by the frame 36 which is angled to the vertical and movable against the spring to adjust the centre of gravity to the load carried. <IMAGE>
Description
"IMPROVEMENTS IN OR RELATING TO HANDLING OF LOADS".
The present invention relates to handling apparatus and to a method of operating load handling apparatus. The invention is particularly, although not exclusively applicable to loads comprising drums.
According to one aspect of the present invention handling apparatus includes a mounting from which the apparatus is arranged to be suspended, and load engaging means arranged to be movable relative to the mounting at an angle to the vertical.
The load engaging means may be connected to a member which is arranged to move relative to the mounting at an angle to the vertical.
The relative movement of the load engaging means to the mounting may be arranged to be generally linear.
Alternatively or additionally the angle to the vertical may be transverse to the vertical and may be approximately 600 to the vertical.
The load engaging means may be movable in the direction extending at an angle to the vertical relative to the mounting whilst the load engaging means are in the first position. The load engaging means may be arranged to engage a load in a first position with the load engaging means being arranged to move in a direction extending at an angle to the vertical relative to the mounting when a load is engaged by the load engaging means.
The load engaging means may be movable relative to the mounting between a first position and a second position whereby a load engaged by the load engaging means is reorientated by angular movement relative to the horizontal.
The load engaging means may be arranged to move both angularly to reorientate a load engaged by the load engaging means and at an angle to the vertical relative to the mounting when moving from the first to the second position.
The load engaging means may be movable in the direction extending at an angle to the vertical between limit positions or, alternatively or additionally, the load engaging means may be arranged to occupy a plurality of positions relative to the mounting. The load engaging means may be adapted to slide relative to the mounting in the direction extending at an angle to the vertical. The load engaging means may be indirectly connected to a slide member which is arranged to move relative to the mounting when the load engaging means are moving at an angle to the vertical relative to the mounting.
The extent of movement of the load engaging means in the direction extending at an angle to the vertical relative to the mounting may be adjustable in at least one direction, and preferably two directions.
The apparatus may include biasing means arranged to bias the load engaging means relative to the mounting in a first direction extending at an angle to the vertical.
When the load engaging means are in the first position and a load is engaged, the weight of the load may exert a force to bias the load engaging means in a second direction opposed to the first direction relative to the mounting. The biasing means may comprise a spring and may comprise a pre-compressed spring. The spring may be arranged to pivot when the load engaging means are moving relative to the mounting at an angle to the vertical.
When the load engaging means have moved in the second direction with the load engaging means engaging and supporting a load in the first position, movement of the load engaging means to the second position may be arranged to cause the load engaging means to move in the first direction relative to the mounting. That movement may be caused by abutment of a portion, which may comprise a rotatable portion, arranged to move with the load engaging means with a portion fixed relative to the mounting.
When the load engaging means is in the first position and a load is engaged the centre of gravity of the load may be to one side of a vertical passing through the centre of the mounting and the centre of gravity of the apparatus may be arranged to be to the other side of the vertical passing through the centre of gravity of the mounting. The combined centres of gravity of the load and the apparatus may be substantially vertically beneath the centre of the mounting.
The mounting may be arranged to be suspended and movable about a point.
The load engaging means, when in the first position, may be arranged to be located in substantially the same orientation, whether or not a load is engaged and supported by the load engaging means.
When the load engaging means is in the second position and a load is engaged by the load engaging means, the centre of gravity of the apparatus and the centre of gravity of the load may both be located substantially vertically beneath the centre of the mounting.
An hydraulic actuator or hydraulic actuators may be arranged to move the load engaging means between the first and second positions.
According to a further aspect of the present invention a method of operating load handling apparatus suspended by a mounting comprises load engaging means of the apparatus moving relative to the mounting at an angle to the vertical.
The method may comprise approaching a load to be picked up with the load engaging means being in a first position and extending in a first angular direction with the centre of gravity of the suspended apparatus being located generally beneath the centre of the mounting, initially engaging the load with the centre of gravity of the load being located to one side of a vertical passing through the centre of the mounting, and raising the load engaging means to support the load with the load engaging means remaining in the first position and extending in the first angular direction, with the load engaging means moving at an angle to the vertical as the weight of the load is taken up in order that the combined centre of gravity of the suspended apparatus and the load are located generally vertically beneath the mounting.
The method may comprise depositing a load engaged by the load engaging means being located in a first position and extending in a first angular direction with the centre of gravity of the suspended apparatus and the supported load being located generally beneath the mounting, lowering the load engaging means such that the weight of the load is transferred from the load engaging means to another support with the load engaging means moving at an angle to the vertical relative to the mounting as the load is relieved whereby the centre of gravity of the suspended apparatus is located generally beneath the vertical passing through the mounting and with the load engaging means remaining generally extending in the first angular direction in the first position.
The method may comprise a load being engaged by the load engaging means in a first position and reorientating the load by angular movement of the load engaging means relative to the horizontal to a second position with the load engaging means moving relative to the mounting when moving from the first to the second position. The load engaging means may be caused to move at an angle relative to the vertical when moving from the first to the second position by abutment of a first portion arranged to move with the load engaging means and a second portion fixed relative to the mounting.
The present invention may be carried into practice in various ways, but one embodiment will now be described by way of example and with reference to the accompanying drawings, in which:
Figure 1 is a schematic side view of lifting apparatus 10 engaging and supporting a cylindrical drum 12 having its longitudinal axis extending upwardly;
Figure 2 is a view similar to Figure 1 with the drum 12 being engaged and supported with its longitudinal axis extending horizontally;
Figure 3 is a view of the apparatus shown in Figures 1 and 2 with the drum 12 being orientated between the positions shown in Figures 1 and 2;
Figure 4 is a schematic side view of part of the lifting apparatus with a part cut away to show the location of a biasing spring 14;
Figure 5 is a detail showing the spring 14 together with the portions with which it co-operates;;
Figure 6 is a schematic plan view showing the location and operation of four tines relative to a barrel, and
Figure 7 is a schematic view through part of the end of a barrel showing the engagement of one of the tines with a rim 16 of a barrel 12.
The lifting apparatus 10 is suspended from a rotatable mounting assembly 18 which is arranged to be suspended from a movable arm (not shown) provided on a loader such as a lorry. The mounting arrangement can be manoeuvred up and down and rotated, and moved to the required position upon hydraulic actuation of the arm and the rotatable assembly.
The drums which are to be lifted, manoeuvred and deposited by the apparatus are frequently stacked closely together either with their longitudinal axes extending vertically with the drum being supported on one end or with their longitudinal axes extending horizontally with the drums being supported at one or more points on their cylindrical surface. Accordingly there is not a great deal of room available for the insertion of the shorter and longer tines 20 and 22 respectively. Thus it is desirable for the tines to be brought alongside the drums whilst the tines extend generally parallel to the longitudinal axis of the drum to be lifted, and for the tines to move in the general direction of the longitudinal axis of the drum.Furthermore, when the drum is supported by the apparatus it is desirable for the direction in which the longitudinal axis of the drum extends to remain extending in generally the same direction drum during the initial movement to avoid other drums in a stack being knocked or scraped by the movement away from the stack of the drum or apparatus.
The apparatus 10 shown in the drawings tends to maintain the centre of gravity of the apparatus, whether loaded or unloaded and whether a drum is full, partially full or empty substantially vertically beneath the mounting assembly 18.
As shown in Figure 1, the centre of gravity G of the apparatus is generally in line with the longitudinal axis of the drum 12. Accordingly, the mounting 18 can be lowered, with the tines 20 and 22 extending vertically downwardly, until they occupy the position shown relative to the drum. The tines 20 and 22 can then be moved inwardly to engage the full drum (as described later in relation to Figures 6 and 7) and the mounting 18 can then be raised such that the apparatus supports the drum. As the centre of gravity of the drum is in line with the centre of gravity of the apparatus, the tines remain extending substantially vertically when the drum is lifted.
The engaged drum can then be moved to the required new position with the longitudinal axis remaining generally vertical, without reorientating the axis, before being lowered onto its end face in a new position and being released by moving the tines 20 and 22 apart.
Alternatively the drum can be moved by tilting the drum through the position shown in Figure 3 to the position shown in Figure 2. That tilting movement is effected by a pair of hydraulic actuators 24 and 26 as described below.
The tines 20 and 22 extend from a platform 28 which is arranged to abut with the end of a drum. As shown in
Figure 3, one end of the platform 28 is connected to the actuator 26 by a pivot 30 and the other end of the platform is connected to a pair of spaced parallel swinging arms 32 (only one of which is shown in the figures) by pivots 34. The upper end of the actuator 26 is connected to one end of a head frame 36 by a pivot 38.
The other end of the swinging arms 32 are connected to a mid region of the head frame 36 by pivots 40. One end of the other actuator 24 is connected to the other end of the head frame 36 by a pivot 42 and to an intermediate region of the swinging arms by a pivot 44. When the actuators 24 and 26 are hydraulically actuated they extend and move the platform 28 initially downwardly and to the right from the position shown in Figure 3 to the position shown in Figure 2 with the platform moving in a clockwise direction with that movement being accommodated by movement at the pivots 30, 34, 38, 40, 42 and 44.Further extension of the actuators 24 and 26 from the position shown in Figure 3 causes the top of the platform 28 at the pivot 34 to rise slightly, as the arms 32 pass the vertical position, but with continued downwards movement of the bottom of the platform until the apparatus occupies the position shown in Figure 2 with the tines extending horizontally.
Movement of the full drum from the position shown in
Figure 2 to the position shown in Figure 1 is a reversal of the above described sequence.
In the position shown in Figure 2, and the positions intermediate the positions shown in Figures 1 and 2, it can be seen that the centre of gravity G of the apparatus and the full drum remains substantially beneath the mounting assembly 18.
When the apparatus is in the position shown in Figure 2, the drum can be moved into a confined space,in the direction in which the longitudinal axis of the drum extends if desired, and lowered until the barrel is supported by abutment with another surface or surfaces.
The tines can then be moved apart to release them from engagement with the drum.
From Figure 2 it can be seen that the centre of gravity of the drum is not immediately beneath the mounting 18. Accordingly, when the weight of the full drum is relieved from the apparatus the centre of gravity of the apparatus alone would be to the right of the vertical to the mounting 18 and, if it were allowed to remain to the right, would cause the tines to tilt relative to the horizontal. However, the apparatus includes an angled slide 46 which extends at approximately 30O to the horizontal which is fast with the head frame 36.
The slide 46 extends through a socket 48 in the swivel mounting 18. As shown in Figures 4 and 5 the spring 14 acts between the left hand end of the head frame 36 and a bracket 50 which is fast with the mounting 18 to urge the head frame 36 to the left and upwardly in the direction of arrow 52 relative the mounting 18. Accordingly, when the weight of the full drum is relieved from the apparatus the combined weight of the full drum and the apparatus no longer acts to urge the slide downwardly relative to the socket and the weight of the apparatus alone is not sufficient to hold the slide down against the force of the spring, and the slide takes the head frame and the other components upwardly and to the left to move the centre of gravity to the left so that it may move back beneath, or remain beneath the mounting 18.Movement of the slide relative to the mounting is limited by abutment of adjustable threaded stop members 54 with the ends of the socket 48.
With the slide moved to the left relative to the socket, the unloaded tines are able to remain in the horizontal position and the mounting can be lowered slightly to allow the tines to be swung clear of the discharged barrel or inserted beneath another barrel.
If the drum which is being picked up by the horizontal tines is empty then the slide may remain upwardly and to the left, with the socket abutting the lower stop member 54. Alternatively, if the drum is of sufficient weight alone, or if the drum is partially full, when it is picked up by the horizontal tines, the slide may move downwardly through the socket and may occupy a position whereby the socket is spaced from both of the stop members to ensure that the centre of gravity is maintained substantially beneath the mounting 18.
When the apparatus is unloaded and the tines are required to be moved from the horizontal position to the vertical position the socket 48 initially abuts the lowermost stop member 54, and if all that happened was that the actuators 24 and 26 were retracted, then the socket would remain abutting that lower stop and the centre of gravity would be to the right of the mounting.
However, as shown in chain lines in Figure 4, the bracket 50 of the mounting, when the socket abuts the lower stop member, abuts a wheel 56 which is rotatably mounted between the arms 32. As the arms 32 move in a clockwise direction upon retraction of the actuator 24 the wheel 56 rotates and pushes against the bracket 50 to cause the slide 46 to be pushed through the socket 48 until the socket abuts the upper stop member 54 as shown in Figure 1.
A damping spring 58 is included within the main spring 14, as shown in Figure 5, to take up any shock loadings which may be exerted upon rapid movement of the slide to the position shown.
Referring now to the operation of the tines 20 and 22 and to Figures 6 and 7, the two long tines 22 are fixed with respect to the platform 28 but the shorter tines 20 are movable towards or away from the tines 22 upon actuation of a hydraulic cylinder 60 to engage or disengage with a drum.
The tines 22 include an angled flat surface 62 which, in the horizontal position provide support for a drum, and each of the tines 20 and 22 includes an inwardly facing groove 64 into which the rim 66 of a drum extends to hold the drum between the tines. The co-operation of the grooves of the tines with the rim of the drum is such that the drum is held securely without any pressure, or any undue pressure being required to be exerted on the rim of the drum.
Claims (38)
1. Handling apparatus including a mounting from which the apparatus is arranged to be suspended and load engaging means arranged to be movable relative to the mounting at an angle to the vertical.
2. Apparatus as claimed in Claim 1 in which the load engaging means are connected to a member which is arranged to move relative to the mounting at an angle to the vertical.
3. Apparatus as claimed in Claim 1 or 2 in which relative movement of the load engaging means to the mounting is arranged to be generally linear.
4. Apparatus as claimed in any preceding claim in which the angle to the vertical is transverse to the vertical.
5. Apparatus as claimed in any preceding claim in which the angle to the vertical is approximately 60 to the vertical.
6. Apparatus as claimed in any preceding claim in which the load engaging means are movable in the direction extending at an angle to the vertical relative to the mounting whilst the load engaging means are in a first position.
7. Apparatus as claimed in Claim 6 in which the load engaging means are arranged to engage a load in the first position with the load engaging means being arranged to move in a direction extending at an angle to the vertical relative to the mounting when a load is engaged by the load engaging means.
8. Apparatus as claimed in any preceding claim in which the load engaging means are movable relative to the mounting between a first position and a second position whereby a load engaged by the load engaging means is reorientated by angular movement relative to the horizontal.
9. Apparatus as claimed in any preceding claim in which the load engaging means are arranged to move both angularly to reorientate a load engaged by the load engaging means and at an angle to the vertical relative to the mounting when moving from the first to the second position.
10. Apparatus as claimed in any preceding claim in which the load engaging means are movable in the direction extending at an angle to the vertical between limit positions.
11. Apparatus as claimed in any preceding claim in which the load engaging means are arranged to occupy a plurality of positions relative to the mounting.
12. Apparatus as claimed in any preceding claim in which the load engaging means are adapted to slide relative to the mounting in the direction extending at an angle to the vertical.
13. Apparatus as claimed in any preceding claim in which the load engaging means are indirectly connected to a slide member which is arranged to move relative to the mounting when the load engaging means are moving at an angle to the vertical relative to the mounting.
14. Apparatus as claimed in any preceding claim in which the extent of movement of the load engaging means in the direction extending at an angle to the vertical relative to the mounting is adjustable in at least one direction.
15. Apparatus as claimed in Claim 14 in which the extent of movement is adjustable in two directions.
16. Apparatus as claimed in any preceding claim including biasing means arranged to bias the load engaging means relative to the mounting in a first direction extending at an angle to the vertical.
17. Apparatus as claimed in any preceding claim in which, when the load engaging means are in a first position and a load is engaged, the weight of the load is arranged to exert a force to bias the load engaging means in a second direction opposed to a first direction relative to the mounting.
18. Apparatus as claimed in Claim 16 or Claim 17 when dependent upon Claim 16 in which the biasing means comprises a spring.
19. Apparatus as claimed in Claim 18 in which the biasing means comprises a pre-compressed spring.
20. Apparatus as claimed in Claim 18 or 19 in which the spring is arranged to pivot when the load engaging means are moving relative to the mounting at an angle to the vertical.
21. Apparatus as claimed in any preceding claim in which, when the load engaging means have moved in a second direction with the load engaging means engaging and supporting a load in a first position, movement of the load engaging means to a second position is arranged to cause the load engaging means to move in a first direction relative to the mounting.
22. Apparatus as claimed in Claim 21 in which the movement is arranged to be caused by abutment of a portion arranged to move with the load engaging means with a portion fixed relative to the mounting.
23. Apparatus as claimed in Claim 22 in which the movement is caused by abutment of a rotatable portion arranged to move with the load engaging means with a portion fixed relative to the mounting.
24. Apparatus as claimed in any preceding claim in which, when the load engaging means is in the first position and a load is engaged, the centre of gravity of the load is to one side of a vertical passing through the centre of the mounting and the centre of gravity of the apparatus is to the other side of the vertical passing through the centre of gravity of the mounting.
25. Apparatus as claimed in Claim 24 in which the combined centres of gravity of the load and apparatus are arranged to be substantially vertically beneath the centre of the mounting.
26. Apparatus as claimed in any preceding claim arranged to be suspended and movable about a point.
27. Apparatus as claimed in any preceding claim in which the load engaging means, when in a first position, are arranged to be located in substantially the same orientation, whether or not a load is engaged and supported by the load engaging means.
28. Apparatus as claimed in any preceding claim in which, when the load engaging means is in a second position and a load is engaged by the load engaging means, the centre of gravity of the apparatus and the centre of gravity of a load are both located substantially vertically beneath the centre of the mounting.
29. Apparatus as claimed in any preceding claim in which an hydraulic actuator is arranged to move the load engaging means between a first and second position.
30. Apparatus as claimed in any preceding claim in which hydraulic actuators are arranged to move the load engaging means between a first and second position.
31. Handling apparatus substantially as herein described with reference to, and as shown in any of the accompanying drawings.
32. A method of operating a load handling apparatus suspended by a mounting comprising load engaging means of the apparatus moving relative to the mounting at an angle to the vertical.
33. A method as claimed in Claim 30 comprising approaching a load to be picked up with the load engaging means being in a first position and extending in a first angular direction with the centre of gravity of the suspended apparatus being located generally beneath the centre of the mounting, initially engaging the load with the centre of gravity of a load being located to one side of a vertical passing through the centre of the mounting, and raising the load engaging means to support the load with the load engaging means remaining in the first position and extending in the first angular direction with the load engaging means moving at an angle to the vertical as the weight of the load is taken up in order that the combined centre of gravity of the suspended apparatus and the load are located generally vertically beneath the mounting.
34. A method as claimed in Claim 30 or 31 comprising depositing a load engaged by the load engaging means being located in a first position and extending in a first angular direction with the centre of gravity of the suspended apparatus and the supported load being located generally beneath the mounting, lowering the load engaging means such that the weight of the load is transferred from the load engaging means to another support with the load engaging means moving at an angle to the vertical relative to the mounting as the load is relieved whereby the centre of gravity of the suspended apparatus is located generally beneath the vertical passing through the mounting and with the load engaging means remaining generally extending in the first angular direction in the first position.
35. A method as claimed in any of Claims 30 to 32 comprising a load being engaged by the load engaging means in a first position and reorientating the load by angular movement of the load engaging means relative to the horizontal to a second position with the load engaging means moving relative to the mounting when moving from the first to the second position.
36. A method as claimed in Claim 33 in which the load engaging means are caused to move at an angle relative to the vertical when moving from the first to the second position by abutment of a first portion arranged to move with the load engaging means and a second portion fixed relative to the mounting.
37. A method of operating load handling apparatus substantially as herein described with reference to, and as shown in the accompanying drawings.
38. A method as claimed in any of Claims 32 to 37 when using handling apparatus as claimed in any of Claims 1 to 31.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| GB9103124A GB2252759A (en) | 1991-02-14 | 1991-02-14 | Improvements in or relating to handling of loads |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| GB9103124A GB2252759A (en) | 1991-02-14 | 1991-02-14 | Improvements in or relating to handling of loads |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| GB9103124D0 GB9103124D0 (en) | 1991-04-03 |
| GB2252759A true GB2252759A (en) | 1992-08-19 |
Family
ID=10690017
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| GB9103124A Withdrawn GB2252759A (en) | 1991-02-14 | 1991-02-14 | Improvements in or relating to handling of loads |
Country Status (1)
| Country | Link |
|---|---|
| GB (1) | GB2252759A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB2349854A (en) * | 1999-05-14 | 2000-11-15 | Eka Ltd | Wheel handler |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB847410A (en) * | 1956-12-21 | 1960-09-07 | Jack Breslav | A grapple mechanism |
| GB953261A (en) * | 1961-05-01 | 1964-03-25 | Bickerstaff Inc | Apparatus for lifting stacked building units |
| GB1082577A (en) * | 1965-05-29 | 1967-09-06 | John Mcrobbie Atomak Products | Fork attachment for a crane |
| GB1179257A (en) * | 1966-11-19 | 1970-01-28 | Zupancic Viktor | Improvements in or relating to Self-Levelling Loading Devices. |
| US4553899A (en) * | 1983-11-16 | 1985-11-19 | Riccardo Magni | High lift truck with telescoping boom assemblies |
-
1991
- 1991-02-14 GB GB9103124A patent/GB2252759A/en not_active Withdrawn
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB847410A (en) * | 1956-12-21 | 1960-09-07 | Jack Breslav | A grapple mechanism |
| GB953261A (en) * | 1961-05-01 | 1964-03-25 | Bickerstaff Inc | Apparatus for lifting stacked building units |
| GB1082577A (en) * | 1965-05-29 | 1967-09-06 | John Mcrobbie Atomak Products | Fork attachment for a crane |
| GB1179257A (en) * | 1966-11-19 | 1970-01-28 | Zupancic Viktor | Improvements in or relating to Self-Levelling Loading Devices. |
| US4553899A (en) * | 1983-11-16 | 1985-11-19 | Riccardo Magni | High lift truck with telescoping boom assemblies |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB2349854A (en) * | 1999-05-14 | 2000-11-15 | Eka Ltd | Wheel handler |
| GB2349854B (en) * | 1999-05-14 | 2002-07-10 | Eka Ltd | Wheel handler |
Also Published As
| Publication number | Publication date |
|---|---|
| GB9103124D0 (en) | 1991-04-03 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| 732 | Registration of transactions, instruments or events in the register (sect. 32/1977) | ||
| WAP | Application withdrawn, taken to be withdrawn or refused ** after publication under section 16(1) |