CA1334831C - Foldup towable hoist with truck guide channels - Google Patents
Foldup towable hoist with truck guide channelsInfo
- Publication number
- CA1334831C CA1334831C CA 595225 CA595225A CA1334831C CA 1334831 C CA1334831 C CA 1334831C CA 595225 CA595225 CA 595225 CA 595225 A CA595225 A CA 595225A CA 1334831 C CA1334831 C CA 1334831C
- Authority
- CA
- Canada
- Prior art keywords
- boom
- hoist
- carriage frame
- truck
- pivoting
- 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 - Fee Related
Links
- 230000000087 stabilizing effect Effects 0.000 claims description 4
- 238000004804 winding Methods 0.000 claims description 2
- 239000000463 material Substances 0.000 abstract description 4
- 239000011449 brick Substances 0.000 abstract description 2
- 229910000831 Steel Inorganic materials 0.000 description 2
- 239000010959 steel Substances 0.000 description 2
- 229910000746 Structural steel Inorganic materials 0.000 description 1
- 230000003213 activating effect Effects 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 231100001261 hazardous Toxicity 0.000 description 1
- 239000004615 ingredient Substances 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 238000005461 lubrication Methods 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 239000002689 soil Substances 0.000 description 1
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B66—HOISTING; LIFTING; HAULING
- B66F—HOISTING, LIFTING, HAULING OR PUSHING, NOT OTHERWISE PROVIDED FOR, e.g. DEVICES WHICH APPLY A LIFTING OR PUSHING FORCE DIRECTLY TO THE SURFACE OF A LOAD
- B66F9/00—Devices for lifting or lowering bulky or heavy goods for loading or unloading purposes
- B66F9/02—Stationary loaders or unloaders, e.g. for sacks
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B66—HOISTING; LIFTING; HAULING
- B66F—HOISTING, LIFTING, HAULING OR PUSHING, NOT OTHERWISE PROVIDED FOR, e.g. DEVICES WHICH APPLY A LIFTING OR PUSHING FORCE DIRECTLY TO THE SURFACE OF A LOAD
- B66F11/00—Lifting devices specially adapted for particular uses not otherwise provided for
- B66F11/04—Lifting devices specially adapted for particular uses not otherwise provided for for movable platforms or cabins, e.g. on vehicles, permitting workmen to place themselves in any desired position for carrying out required operations
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B66—HOISTING; LIFTING; HAULING
- B66F—HOISTING, LIFTING, HAULING OR PUSHING, NOT OTHERWISE PROVIDED FOR, e.g. DEVICES WHICH APPLY A LIFTING OR PUSHING FORCE DIRECTLY TO THE SURFACE OF A LOAD
- B66F9/00—Devices for lifting or lowering bulky or heavy goods for loading or unloading purposes
- B66F9/06—Devices for lifting or lowering bulky or heavy goods for loading or unloading purposes movable, with their loads, on wheels or the like, e.g. fork-lift trucks
Landscapes
- Engineering & Computer Science (AREA)
- Structural Engineering (AREA)
- Transportation (AREA)
- Life Sciences & Earth Sciences (AREA)
- Geology (AREA)
- Mechanical Engineering (AREA)
- Civil Engineering (AREA)
- Jib Cranes (AREA)
Abstract
A hoist includes a lower main carriage frame to which is affixed a rigid upright boom. A second longer boom is pivotly attached to the base of the upright boom. The upright boom carries at its upper end a pully as does the distal end of the pivoting boom. A winch is mounted on the upright boom and its cable, when threaded over the pullies, and attached to the main carriage frame, will pivot the boom into the vertical position where it may be fixedly attached to the vertical boom. A truck is adapted to travel up and down the pivoting boom when in the vertical position. The truck carries amaterial carrying platform so that materials such as bricks may be moved from one elevation into another conveniently. The hoist when the pivoting boom is in its horizontal and non operative position can be easily moved from site to site since it has running wheels attached to the main carriage frame.
Description
This invention relates to a moveable hoist and particularly to a free standing hoist that may be moved from place to place and easily errected.
Various hoists have been disclosed in the prior art but it is an object of this invention to provide a freestanding hoist with its own base, totally independent of scaffolding around it and to provide that the hoist may raise and lower its support platform to an elevation of at least 10 feet (2 meters) and as high as 24 feet (8 meters) or more so that goods such as bricks, blocks and the like may be moved vertical in elevation to a bricklayer and the like for installation during construction.
It is an object to the invention to provide a moveable hoist which when on site and in its operative position is fixed and stablized there thus avoiding the need to use fork lift truck to move and lift goods. Fork lift trucks are hazardous because as a necessary ingredient to lifting the load they require moverability and in soft or muddy soil condition they raise a significant safety hazard.
It is also an object to the invention to provide a hoist which may be easily erected on site and has the minimum of moving part thus requiring infrequent lubrication and to provide means for activating the hoist by way of an electric wing which if connected to a battery and driven by battery power provides free flexability as to the location where the hoist can be erected.
It is further an object to the invention to provide a cheap hoist which is affordable by the small business contractor.
The invention therefor contemplate a hoist that is adapted to be moved from one site to another and when on site may be assembled into an operative position whereby it is adapted to move a load from one elevation into another comprising;
(a) a carriage frame including surface travelling wheels for moving the hoist from one site to another, the carriage frame carrying outriggers with means for stabilizing the carriage frame at a given elevation;
Various hoists have been disclosed in the prior art but it is an object of this invention to provide a freestanding hoist with its own base, totally independent of scaffolding around it and to provide that the hoist may raise and lower its support platform to an elevation of at least 10 feet (2 meters) and as high as 24 feet (8 meters) or more so that goods such as bricks, blocks and the like may be moved vertical in elevation to a bricklayer and the like for installation during construction.
It is an object to the invention to provide a moveable hoist which when on site and in its operative position is fixed and stablized there thus avoiding the need to use fork lift truck to move and lift goods. Fork lift trucks are hazardous because as a necessary ingredient to lifting the load they require moverability and in soft or muddy soil condition they raise a significant safety hazard.
It is also an object to the invention to provide a hoist which may be easily erected on site and has the minimum of moving part thus requiring infrequent lubrication and to provide means for activating the hoist by way of an electric wing which if connected to a battery and driven by battery power provides free flexability as to the location where the hoist can be erected.
It is further an object to the invention to provide a cheap hoist which is affordable by the small business contractor.
The invention therefor contemplate a hoist that is adapted to be moved from one site to another and when on site may be assembled into an operative position whereby it is adapted to move a load from one elevation into another comprising;
(a) a carriage frame including surface travelling wheels for moving the hoist from one site to another, the carriage frame carrying outriggers with means for stabilizing the carriage frame at a given elevation;
(b) a pivoting boom member carrying at its proximate end, means for pivoting said pivoting boom member relative to said carriage frame and having a length from its proximate end to its distal end, substantially greater than that of the carriage frame; said pivoting boom member including;
(i) a pully mounted near its distal end;
(ii) lateral members extending from the proximate end to the distal end and carrying a truck travelling region;
(c) means for moving the pivoting boom from a non-operative lower position to a vertical operative second; position whereby, (d) a truck carrying adopted for carrying a load carrying platform and adapted to travel up and down said second boom through the truck travelling region.
In that respect the carriage frame carries means for locking the pivoting boom in the vertical and prefers such means as a vertical frame.
The invention will now be described by way of example and with reference to the accompanying drawings in which:
Figure 1 is a perspective view of an embodiment of the invention when in its upright operative position.
Figure 2 is a perspective view of the embodiment of figure 1 when in its non-operative and lowered position ready for towing from site to site.
Figure 3 is a section along III-III of figure 1.
Figure 4 is a perspective view, partially broken away, of the boom locking pin.
Figure 5 is a perspective view, similar to figure 1, showing the invention in application.
Figure 6, located on the sheet of drawings with figures 4 and 5 is a perspective detail, partially broken away, of a removable material carrying platform of the hoist.
Referring to figure 1, a hoist 10 includes a longitudinal lower main or carriage frame 11 comprised of a _ 3 - ~ 33~ 83 1 plurality of parallel longitudinal steel beams 13 welded to cross end beams 14 and a central cross beam 15 so as to form a rigid rectangular carriage frame. Welded to each end beam 14 is an underlying stabilizing beam 17 which terminates at an uprising jackleg well 18. Each jackleg well 18 accomodates a jackleg 20. Each jackleg well 18 is an outrigger shaped as a piece of hollow square tubing with its upper end 19 welded closed. Each jackleg 20 includes a lower support plate 21 a threaded shaft 22 and turnbuckle 23 which when rotated allows the shaft 22 to migrate in and out of the jackleg 18 and hence to place the support plate 21 at an appropriate elevation from the support bar 17 so as to stabilize, as will now be apparent, the carriage-frame 11 when in use.
Slightly forward of the central cross beam 15, is the central axis of the carriage frame 16 and an axle is suspended from the central axis supported by an appropriate spring mechanism (not shown). The axle carries, on opposite ends running wheels 25 which allow the hoist 10, as will become apparent hereafter, to be towed from site to site. The running wheels 25 are inboard of the jackleg wells 20.
More clearly seen in figure 2, but also seen in figures 1 and 5, is a pivoting main boom 30 that consists of two longitudinal lateral members 32 which are closed off at the distal upper end 33 by an end cross beam 34. This cross beam 34, carries a forwardly protruding centrally located hitch bar 37 and laterally inclined stabilizing bars 38 the ends of which are welded to a common point being a steel anulus 39 which acts as the hitch point for the hoist when in its non-operative and towing position, shown in figure 2.
The lower proximate end of each lateral member 32 is closed off by an end cross beam 41, as more clearly seen in figure 4. The ends of the cross beam 41 each have a protruding cylindrical arbour 42 that is indexed into a circumscribing sleeve 49. That sleeve 49 is welded to the top of the central cross beam 15 and to a vertical plate, 15' which is also welded to the back of the central cross beam 15 _ 4 _ 1 33 4 8 3 1 and additionally welded to the sleeve 49. For rigidity, the lateral longitudinal members 32 of the main boom 30 are cross supported by a plurality of orthoganally placed cross beams 39 and by cross inclined beams 39'. THe sleeves 49 and arbors 42 are the pivot points for the boom 50. Midway along the end beam 34 of the main boom 50 is an electrically driven winch pully 38. Additional stability to the pivoting main boom 30 is provided by plurality of lateral brace beams 35 and angle beams 36 seen in the figures.
Returning to the lower main carriage frame 11 and as more clearly seen in figures 2, 3 and 5, the main carriage frame, carries at the central cross beam 15 a smaller upright boom generally indicated as 50. The upright boom 50 includes two vertical lateral beams 51 welded at the bottom to the central cross beam 15 and to the lateral vertical plate 15'. The vertical beams 51 carry an upper cross beam 53, which acts as the main boom locking bar. The vertical boom 50 is stabilized in the vertical position by inclined lateral support beams 54, which at their upper end are welded to the upper cross beam 53, and at their respective lower end to the intersecting corner of the end beam 14 with one of the side longitudinal beams 13. A cross brace, beam 54, provides additional stability to the vertical boom 50 and acts as the mounting base for the electric winch 90.
When the main boom 30 is in the vertical and operative position of figures 1 and 5, it allows the sliding of a carrier assembly generally shown as 60 along the boom. The carrier assembly 60 consists of a carrier truck 65 that travels between the longitudinal members 32. In this regard and referring to the cross section figure 3, each of the longitudinal members 32 has welded to its front and back surface thereof, a boom slide rail 133 so as to define a longitudinally oriented U-shaped channel along the inside of each longitudinal member 32. It is through this U-shape channel that the side beams 66 of the truck 65 slide.
Referring to figure 4, these boom rails 133 need not extend to -the end of the proximate end so long as they are at least a distance T from the proximate end and the distance T is approximately one half the length or height of the truck 65.
The truck 65 thus consists of side beams 66 an upper and a lower cross beam 67 and 68. The upper cross beam 67 has a pair of forwardly protruding U-shaped members 69 as does the bottom beam 68. The assembly 60 includes a removable material platform 75 which may be locked into the truck 65, as now will be described.
Referring to figures 5 and 6, the removable materials carrying platform 75 consists of a flat bottom 76 which is supported by cross girders 77, which are welded respectively to a front lateral beam 78, and a back lateral beam 79. From each of the front and back beams 78 and 79 there are a plurality of vertical uprising beams. Along the front margin there are 4 vertical beams 80, each of which terminate at a horizontal angle iron 81, that acts as the upper frontal margin. Along the back beam 79, there are two end beams 82 of equal height which carry therebetween a lateral cross beam 20 84. There are also 2 vertical central beams 85, which protrude above the lateral beam 84 and extend below the back beam 79. The distal upper ends of beams 85 are adapted to mate into the protuding U-shape members 69 carried by the upper cross beam 81 of the truck while the lower ends of beams 85 mate into U shaped protruding members 69L mounted on lower rear cross beam 65. Movement of the truck 65 moves the platform 75. If additional platform stability is desired, an angulated cross beam 88 closes off one or both ends of the movable platform 75.
The truck 65 and platform 75, are moved up and down the boom 50 by the winch 90, that also serves to raise and to lower the pivoting boom 30 in the manner as now described.
Referring to figures 1, 2 and 5 the electric winch 90 is mounted to the angle brace 54. The upper cross beam 53 of the boom 50 carries a pully 55 and a cable 56 from the winch is threaded over the pully 50, over pully 34', which is fixedly attached to the main boom upper cross or end beam 34 as seen clearly in figure 1. If the free end of the cable 56 is latched onto the main carriage frame 20, winding of the winch 90, and referring now to figure 2, pivots the main boom 30 upward into the phantom position and eventually into the vertical position of figure 1. In that position, the pivoting boom 30 can be fixedly secured to the vertical boom 50, by means of a pin 95 which extends through aperatures located in the upper cross beam 53 and in the lower most lateral cross beam 35' on the main pivoting boom 30. The lateral beam 35' is positioned so that when the vertical boom 50 is in the vertical position that cross beam 35' is juxtaposed with the upper cross beam 53 of the vertical beam 50. The pin 95 indexes through the aperatures and holds the boom 50 upright.
By reversing the process the pivoting boom 30, can be laid down into its horizontal and non-operative position of figure 1 for moving from site to site.
When the boom 30 has been fixed into its upright and operative position, the distal end of the cable 56 is unlatched from main carriage frame 20, and affixed to the upper cross beam 67 of the truck 65. In this respect upper cross beam 67 has as a receiver R for the latch, an annular accomodating ring.
(i) a pully mounted near its distal end;
(ii) lateral members extending from the proximate end to the distal end and carrying a truck travelling region;
(c) means for moving the pivoting boom from a non-operative lower position to a vertical operative second; position whereby, (d) a truck carrying adopted for carrying a load carrying platform and adapted to travel up and down said second boom through the truck travelling region.
In that respect the carriage frame carries means for locking the pivoting boom in the vertical and prefers such means as a vertical frame.
The invention will now be described by way of example and with reference to the accompanying drawings in which:
Figure 1 is a perspective view of an embodiment of the invention when in its upright operative position.
Figure 2 is a perspective view of the embodiment of figure 1 when in its non-operative and lowered position ready for towing from site to site.
Figure 3 is a section along III-III of figure 1.
Figure 4 is a perspective view, partially broken away, of the boom locking pin.
Figure 5 is a perspective view, similar to figure 1, showing the invention in application.
Figure 6, located on the sheet of drawings with figures 4 and 5 is a perspective detail, partially broken away, of a removable material carrying platform of the hoist.
Referring to figure 1, a hoist 10 includes a longitudinal lower main or carriage frame 11 comprised of a _ 3 - ~ 33~ 83 1 plurality of parallel longitudinal steel beams 13 welded to cross end beams 14 and a central cross beam 15 so as to form a rigid rectangular carriage frame. Welded to each end beam 14 is an underlying stabilizing beam 17 which terminates at an uprising jackleg well 18. Each jackleg well 18 accomodates a jackleg 20. Each jackleg well 18 is an outrigger shaped as a piece of hollow square tubing with its upper end 19 welded closed. Each jackleg 20 includes a lower support plate 21 a threaded shaft 22 and turnbuckle 23 which when rotated allows the shaft 22 to migrate in and out of the jackleg 18 and hence to place the support plate 21 at an appropriate elevation from the support bar 17 so as to stabilize, as will now be apparent, the carriage-frame 11 when in use.
Slightly forward of the central cross beam 15, is the central axis of the carriage frame 16 and an axle is suspended from the central axis supported by an appropriate spring mechanism (not shown). The axle carries, on opposite ends running wheels 25 which allow the hoist 10, as will become apparent hereafter, to be towed from site to site. The running wheels 25 are inboard of the jackleg wells 20.
More clearly seen in figure 2, but also seen in figures 1 and 5, is a pivoting main boom 30 that consists of two longitudinal lateral members 32 which are closed off at the distal upper end 33 by an end cross beam 34. This cross beam 34, carries a forwardly protruding centrally located hitch bar 37 and laterally inclined stabilizing bars 38 the ends of which are welded to a common point being a steel anulus 39 which acts as the hitch point for the hoist when in its non-operative and towing position, shown in figure 2.
The lower proximate end of each lateral member 32 is closed off by an end cross beam 41, as more clearly seen in figure 4. The ends of the cross beam 41 each have a protruding cylindrical arbour 42 that is indexed into a circumscribing sleeve 49. That sleeve 49 is welded to the top of the central cross beam 15 and to a vertical plate, 15' which is also welded to the back of the central cross beam 15 _ 4 _ 1 33 4 8 3 1 and additionally welded to the sleeve 49. For rigidity, the lateral longitudinal members 32 of the main boom 30 are cross supported by a plurality of orthoganally placed cross beams 39 and by cross inclined beams 39'. THe sleeves 49 and arbors 42 are the pivot points for the boom 50. Midway along the end beam 34 of the main boom 50 is an electrically driven winch pully 38. Additional stability to the pivoting main boom 30 is provided by plurality of lateral brace beams 35 and angle beams 36 seen in the figures.
Returning to the lower main carriage frame 11 and as more clearly seen in figures 2, 3 and 5, the main carriage frame, carries at the central cross beam 15 a smaller upright boom generally indicated as 50. The upright boom 50 includes two vertical lateral beams 51 welded at the bottom to the central cross beam 15 and to the lateral vertical plate 15'. The vertical beams 51 carry an upper cross beam 53, which acts as the main boom locking bar. The vertical boom 50 is stabilized in the vertical position by inclined lateral support beams 54, which at their upper end are welded to the upper cross beam 53, and at their respective lower end to the intersecting corner of the end beam 14 with one of the side longitudinal beams 13. A cross brace, beam 54, provides additional stability to the vertical boom 50 and acts as the mounting base for the electric winch 90.
When the main boom 30 is in the vertical and operative position of figures 1 and 5, it allows the sliding of a carrier assembly generally shown as 60 along the boom. The carrier assembly 60 consists of a carrier truck 65 that travels between the longitudinal members 32. In this regard and referring to the cross section figure 3, each of the longitudinal members 32 has welded to its front and back surface thereof, a boom slide rail 133 so as to define a longitudinally oriented U-shaped channel along the inside of each longitudinal member 32. It is through this U-shape channel that the side beams 66 of the truck 65 slide.
Referring to figure 4, these boom rails 133 need not extend to -the end of the proximate end so long as they are at least a distance T from the proximate end and the distance T is approximately one half the length or height of the truck 65.
The truck 65 thus consists of side beams 66 an upper and a lower cross beam 67 and 68. The upper cross beam 67 has a pair of forwardly protruding U-shaped members 69 as does the bottom beam 68. The assembly 60 includes a removable material platform 75 which may be locked into the truck 65, as now will be described.
Referring to figures 5 and 6, the removable materials carrying platform 75 consists of a flat bottom 76 which is supported by cross girders 77, which are welded respectively to a front lateral beam 78, and a back lateral beam 79. From each of the front and back beams 78 and 79 there are a plurality of vertical uprising beams. Along the front margin there are 4 vertical beams 80, each of which terminate at a horizontal angle iron 81, that acts as the upper frontal margin. Along the back beam 79, there are two end beams 82 of equal height which carry therebetween a lateral cross beam 20 84. There are also 2 vertical central beams 85, which protrude above the lateral beam 84 and extend below the back beam 79. The distal upper ends of beams 85 are adapted to mate into the protuding U-shape members 69 carried by the upper cross beam 81 of the truck while the lower ends of beams 85 mate into U shaped protruding members 69L mounted on lower rear cross beam 65. Movement of the truck 65 moves the platform 75. If additional platform stability is desired, an angulated cross beam 88 closes off one or both ends of the movable platform 75.
The truck 65 and platform 75, are moved up and down the boom 50 by the winch 90, that also serves to raise and to lower the pivoting boom 30 in the manner as now described.
Referring to figures 1, 2 and 5 the electric winch 90 is mounted to the angle brace 54. The upper cross beam 53 of the boom 50 carries a pully 55 and a cable 56 from the winch is threaded over the pully 50, over pully 34', which is fixedly attached to the main boom upper cross or end beam 34 as seen clearly in figure 1. If the free end of the cable 56 is latched onto the main carriage frame 20, winding of the winch 90, and referring now to figure 2, pivots the main boom 30 upward into the phantom position and eventually into the vertical position of figure 1. In that position, the pivoting boom 30 can be fixedly secured to the vertical boom 50, by means of a pin 95 which extends through aperatures located in the upper cross beam 53 and in the lower most lateral cross beam 35' on the main pivoting boom 30. The lateral beam 35' is positioned so that when the vertical boom 50 is in the vertical position that cross beam 35' is juxtaposed with the upper cross beam 53 of the vertical beam 50. The pin 95 indexes through the aperatures and holds the boom 50 upright.
By reversing the process the pivoting boom 30, can be laid down into its horizontal and non-operative position of figure 1 for moving from site to site.
When the boom 30 has been fixed into its upright and operative position, the distal end of the cable 56 is unlatched from main carriage frame 20, and affixed to the upper cross beam 67 of the truck 65. In this respect upper cross beam 67 has as a receiver R for the latch, an annular accomodating ring.
Claims (7)
1. A hoist that is adapted to be moved from one site to another and when on site adapted for assembly into an operative position whereby it is adapted to move a load from one elevation into another comprising;
(a) a carriage frame including;
(i) surface traveling wheels for moving the hoist from one site to another, the carriage frame carrying laterally extendable outriggers, each with means for stabilizing the carriage frame at a given elevation:
(ii) a short vertical frame affixed to the carriage frame: and, (iii) means mounted at the base of said vertical frame and carriage frame for receiving pivotal connection;
(b) a pivoting boom member carrying at its proximate end, pivoting means adapted to be received by the receiving pivotal connection and for pivoting said boom member relative to said carriage frame,the boom having a length from its proximate end to its distal end, substantially greater than that of the carriage frame; said pivoting boom member including;
(i) a pully mounted near its distal end;
(ii) lateral members extending from the proximate end to the distal end and defining a truck travelling region;
(c) means for moving the pivoting boom from a non-operative lower position to a vertical operative second position whereby, (d) a truck adapted for carrying a load carrying platform can travel up and down said pivoting boom member, when in the vertical operative second position.
(a) a carriage frame including;
(i) surface traveling wheels for moving the hoist from one site to another, the carriage frame carrying laterally extendable outriggers, each with means for stabilizing the carriage frame at a given elevation:
(ii) a short vertical frame affixed to the carriage frame: and, (iii) means mounted at the base of said vertical frame and carriage frame for receiving pivotal connection;
(b) a pivoting boom member carrying at its proximate end, pivoting means adapted to be received by the receiving pivotal connection and for pivoting said boom member relative to said carriage frame,the boom having a length from its proximate end to its distal end, substantially greater than that of the carriage frame; said pivoting boom member including;
(i) a pully mounted near its distal end;
(ii) lateral members extending from the proximate end to the distal end and defining a truck travelling region;
(c) means for moving the pivoting boom from a non-operative lower position to a vertical operative second position whereby, (d) a truck adapted for carrying a load carrying platform can travel up and down said pivoting boom member, when in the vertical operative second position.
2. The hoist as claimed in claim 1 including means carried by said carriage frame for locking the pivoting boom in the vertical plane.
3. The hoist as claimed in claim 1 wherein the vertical frame includes a pully thereon and the distal end of the boom also includes a pully, a winch carried by the carriage frame having a cable and a free end, the cable adapted to be threaded over both said pullies and adapted to be attached to the carriage frame whereupon on winding of the winch the pivoting boom is adapted to be pivoted between its vertical and non-operative attitudes.
4. The hoist as claimed in claim 1, 2 or 3, wherein the lateral members of the pivoting boom includes means defining the truck travelling region.
5. The hoist as claimed in claim 1, 2 or 3, wherein the lateral members have a plate mounted on front and back surfaces thereof so that each of the plates and said member define a channel through which the truck travels along said boom.
6. The hoist as claimed in claim 1, 2 or 3, wherein the lateral members have a plate mounted on front and back surfaces thereof so that each of the plates and said member define a channel through which the truck travels along said boom and, wherein the truck includes a frame with side members adapted to travel in a channel defined by said plates and pivoting boom.
7. The hoist as claimed in claim 1, 2 or 3, including means on said truck and said platform for releasably dis-engaging the platform from said truck whereby to permit the pivoting boom to lie in a horizontal attitude for travel from one site to the other.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CA 595225 CA1334831C (en) | 1989-03-30 | 1989-03-30 | Foldup towable hoist with truck guide channels |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CA 595225 CA1334831C (en) | 1989-03-30 | 1989-03-30 | Foldup towable hoist with truck guide channels |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CA1334831C true CA1334831C (en) | 1995-03-21 |
Family
ID=4139824
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CA 595225 Expired - Fee Related CA1334831C (en) | 1989-03-30 | 1989-03-30 | Foldup towable hoist with truck guide channels |
Country Status (1)
| Country | Link |
|---|---|
| CA (1) | CA1334831C (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103145048A (en) * | 2013-04-02 | 2013-06-12 | 零永孝 | Cement brick loader |
-
1989
- 1989-03-30 CA CA 595225 patent/CA1334831C/en not_active Expired - Fee Related
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103145048A (en) * | 2013-04-02 | 2013-06-12 | 零永孝 | Cement brick loader |
| CN103145048B (en) * | 2013-04-02 | 2014-12-03 | 零永孝 | Cement brick loader |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| MKLA | Lapsed |