WO1990011409A1 - Road gritter device - Google Patents

Road gritter device Download PDF

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Publication number
WO1990011409A1
WO1990011409A1 PCT/GB1990/000350 GB9000350W WO9011409A1 WO 1990011409 A1 WO1990011409 A1 WO 1990011409A1 GB 9000350 W GB9000350 W GB 9000350W WO 9011409 A1 WO9011409 A1 WO 9011409A1
Authority
WO
WIPO (PCT)
Prior art keywords
gritter
road
hopper body
hopper
endless conveyor
Prior art date
Application number
PCT/GB1990/000350
Other languages
French (fr)
Inventor
William Frank Cotton
Terence Mcgee
Original Assignee
West Yorkshire Highways Engineering And Technical Services Joint Committee
Conveyors Yorkshire Limited
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by West Yorkshire Highways Engineering And Technical Services Joint Committee, Conveyors Yorkshire Limited filed Critical West Yorkshire Highways Engineering And Technical Services Joint Committee
Priority to CA002055603A priority Critical patent/CA2055603A1/en
Publication of WO1990011409A1 publication Critical patent/WO1990011409A1/en
Priority to NO91913755A priority patent/NO913755L/en
Priority to GB9120482A priority patent/GB2248759B/en
Priority to FI914570A priority patent/FI914570A0/en

Links

Classifications

    • E—FIXED CONSTRUCTIONS
    • E01—CONSTRUCTION OF ROADS, RAILWAYS, OR BRIDGES
    • E01H—STREET CLEANING; CLEANING OF PERMANENT WAYS; CLEANING BEACHES; DISPERSING OR PREVENTING FOG IN GENERAL CLEANING STREET OR RAILWAY FURNITURE OR TUNNEL WALLS
    • E01H10/00—Improving gripping of ice-bound or other slippery traffic surfaces, e.g. using gritting or thawing materials ; Roadside storage of gritting or solid thawing materials; Permanently installed devices for applying gritting or thawing materials; Mobile apparatus specially adapted for treating wintry roads by applying liquid, semi-liquid or granular materials
    • E01H10/007—Mobile apparatus specially adapted for preparing or applying liquid or semi-liquid thawing material or spreading granular material on wintry roads
    • E—FIXED CONSTRUCTIONS
    • E01—CONSTRUCTION OF ROADS, RAILWAYS, OR BRIDGES
    • E01C—CONSTRUCTION OF, OR SURFACES FOR, ROADS, SPORTS GROUNDS, OR THE LIKE; MACHINES OR AUXILIARY TOOLS FOR CONSTRUCTION OR REPAIR
    • E01C19/00—Machines, tools or auxiliary devices for preparing or distributing paving materials, for working the placed materials, or for forming, consolidating, or finishing the paving
    • E01C19/12—Machines, tools or auxiliary devices for preparing or distributing paving materials, for working the placed materials, or for forming, consolidating, or finishing the paving for distributing granular or liquid materials
    • E01C19/20—Apparatus for distributing, e.g. spreading, granular or pulverulent materials, e.g. sand, gravel, salt, dry binders
    • E01C19/201—Apparatus for distributing, e.g. spreading, granular or pulverulent materials, e.g. sand, gravel, salt, dry binders with driven loosening, discharging or spreading parts, e.g. power-driven, drive derived from road-wheels
    • E—FIXED CONSTRUCTIONS
    • E01—CONSTRUCTION OF ROADS, RAILWAYS, OR BRIDGES
    • E01C—CONSTRUCTION OF, OR SURFACES FOR, ROADS, SPORTS GROUNDS, OR THE LIKE; MACHINES OR AUXILIARY TOOLS FOR CONSTRUCTION OR REPAIR
    • E01C19/00—Machines, tools or auxiliary devices for preparing or distributing paving materials, for working the placed materials, or for forming, consolidating, or finishing the paving
    • E01C19/12—Machines, tools or auxiliary devices for preparing or distributing paving materials, for working the placed materials, or for forming, consolidating, or finishing the paving for distributing granular or liquid materials
    • E01C19/20—Apparatus for distributing, e.g. spreading, granular or pulverulent materials, e.g. sand, gravel, salt, dry binders
    • E01C19/201—Apparatus for distributing, e.g. spreading, granular or pulverulent materials, e.g. sand, gravel, salt, dry binders with driven loosening, discharging or spreading parts, e.g. power-driven, drive derived from road-wheels
    • E01C19/202—Apparatus for distributing, e.g. spreading, granular or pulverulent materials, e.g. sand, gravel, salt, dry binders with driven loosening, discharging or spreading parts, e.g. power-driven, drive derived from road-wheels solely rotating, e.g. discharging and spreading drums
    • E01C19/203—Centrifugal spreaders with substantially vertical axis
    • E—FIXED CONSTRUCTIONS
    • E01—CONSTRUCTION OF ROADS, RAILWAYS, OR BRIDGES
    • E01C—CONSTRUCTION OF, OR SURFACES FOR, ROADS, SPORTS GROUNDS, OR THE LIKE; MACHINES OR AUXILIARY TOOLS FOR CONSTRUCTION OR REPAIR
    • E01C19/00—Machines, tools or auxiliary devices for preparing or distributing paving materials, for working the placed materials, or for forming, consolidating, or finishing the paving
    • E01C19/12—Machines, tools or auxiliary devices for preparing or distributing paving materials, for working the placed materials, or for forming, consolidating, or finishing the paving for distributing granular or liquid materials
    • E01C19/20—Apparatus for distributing, e.g. spreading, granular or pulverulent materials, e.g. sand, gravel, salt, dry binders
    • E01C2019/2055—Details not otherwise provided for
    • E01C2019/207—Feeding the distribution means
    • E01C2019/2075—Feeding the distribution means with longitudinal conveyor belt

Definitions

  • This invention relates to a road gritter device which forms part of. or is adapted to be mounted on a transport vehicle, and which is operable to distribute particulate material over the surface of a road when required during icy conditions.
  • the particulate material distributed over icy patches on roads usually comprises a suitable form of soluble "salt" which helps to melt any icy patches on a road, and sand or grit which improves vehicle tyre grip with icy and melting ice patches on the road.
  • the material applied to roads in icy conditions is very effective and is a major contribution to road safety in the winter.
  • the salt content of the distributed material is corrosive, and this is both a problem to road users in that it causes unseen underbody corrosion which can only be mitigated by regular underbody washing, and is also and more seriously a problem to the operators of the gritter devices.
  • Existing gritter devices generally comprise a storage hopper for the gritter material, a rotary grit distributor in the form of a spinner disc, and an endless conveyor for transferring the material from the hopper to the distributor.
  • the entire device may form an integral part of a specially designed road gritter vehicle, or may form a de- ountable assembly which can be mounted onto a loading platform of any suitable truck for use during the winter months, but which can be dismounted and kept in storage during the remainder of the year, thereby releasing the truck for other duties.
  • the hopper is fabricated from metal plate or sheet, and the grit distributor is also made of metal, taking the form of a spinner disc which rotates in a horizontal plane and which is driven by a vertical shaft on which it is carried. .Given that the metal components of the existing gritter devices are exposed to direct and continuous contact with the corrosive salt content of the gritter material, these components are subjected to accelerated corrosive attack, when compared with the corrosive action applied to the vehicles bodies of road users, and this therefore involves substantial refurbishment of the component parts before each winter season commences.
  • a road gritter device which forms part of, or is adapted to be mounted on a transport vehicle, and which is operable to distribute gritter material over the surface of a road when required
  • the device comprises: a hopper body for gritter material which is assembled from a plurality of separately formed plates, at least some of which are made of rigid plastics material and which are releasably coupled together for replacement when required; a spinner disc which is rotatable in a substantially horizontal plane in order to distribute laterally gritter material supplied thereto from the hopper; and, an endless conveyor arranged to convey gritter material from the hopper to the spinner disc.
  • a road gritter device which forms part of, or is adapted to be mounted on a transport vehicle, and which is operable to distribute gritter material over the surface of a road when required,
  • the device comprises: a hopper body for gritter material; a spinner disc which is rotatable in a substantially horizontal plane in order to distribute laterally gritter material supplied thereto from the hopper, the disc being made of a rigid. plastics material: and. an endless conveyor arranged to convey gritter material from the hopper to the spinner disc.
  • a road gritter device which forms part of. or is adapted to be mounted on a transport vehicle, and which is operable to distribute gritter material over the surface of a road when required
  • the device comprises: a hopper body for gritter material which is assembled from a plurality of separately formed plates, at least some of v/hich are releasably coupled together for replacement when required; a spinner disc which is rotatable in a substantially horizontal plane in order to distribute laterally gritter material supplied thereto from the hopper; and, an endless conveyor arranged to convey gritter material from the hopper to the spinner disc, an endless conveyor band of the conveyor being made of plastics or elastomeric material.
  • a road gritter device is therefore better able to withstand the corrosive action of the usual "salt" which is present in road gritter material used in this country, since at least some of the component parts of the device are made of plastics material.
  • a particular preferred material is a newly available plastics material obtainable from Macpherson Polymers under the trade name POLYETHER 2874/206.
  • plastics material which have sufficient resilience to withstand the arduous conditions to which they will be exposed, and yet which has sufficient rigidity to be fabricated into suitably robust form for long service.
  • the use of plastics material in the fabrication of some or all of the major components of the road gritter device enables the device to function sa isfactorily and without any corrosive action from the contents of the gritter material.
  • the hopper body is entirely fabricated from separately formed sheets or plates of rigid plastics material which are releasably coupled together, and in the event of any excessive wear occuring in service, or more usually in the event of impact damage by careless use, replacement sheets can readily be installed with only minimal "down time" of the gritter device.
  • the spinner disc is preferably carried at the lower end of a rotatable vertical shaft, and the entire disc will usually be made of suitable rigid plastics material, and so also may be the carrying shaft.
  • the endless conveyor may have most of its major components made of plastics material, such as the endless conveyor band, drive rollers and idle rollers, so as to minimise the opportunity for corrosive attack to take place.
  • a road gritter device may form an integral component of a specially designed and constructed road gritter vehicle, but preferably will be formed as a demountable assembly which can be installed on a loading platform of any suitable truck which will be used for other duties during the seasons other than winter.
  • an underlying sheet of plastics material may be arranged below the gritter device and between it and the loading platform. Then, if any of the "salt" falls downwardly, either in powder form, or in solution following rain falling on the contents of the hopper, the underlying sheet will tend to shield the loading platform from contact with this corrosive medium.
  • the hopper body When the hopper body is assembled entirely from plastics sheets coupled together, it will be preferable for the hopper body to be given additional rigidity by the provision of a rigid supporting frame which engages the upper edge margins of the side walls of the hopper body.
  • This supporting frame may be fabricated from suitable metal sections which are rigidly assembled to form the required frame shape, and a usual mesh screen may be supported by this frame through which the gritter material will be loaded by bucket-mounted loaders.
  • the interior of the hopper body may also be provided with a spreader frame arranged near the lower part of the hopper body.
  • This spreader frame will tend to bear part of the load of the gritter material, and also will facilitate smooth discharge of the material from the lower part of the hopper body onto the underlying endless conveyor.
  • Figure 1 is a diagrammatic side illustration of a road gritter device assembly mounted as a unit on a loading platform of a truck;
  • Figure 2 is a side view, to an enlarged scale, of a detailed embodiment of hopper body of the gritter device
  • Figure 3 is a composite end elevational view of the hopper body
  • Figure 4 is a cross sectional view through the hopper body
  • Figure 5 is a plan view of a support frame for the hopper body
  • Figure 6 is an end elevation of the support frame
  • Figure 7 is a side elevation view of the support frame
  • Figure 8 is a section taken on A-A in Figure 5: and.
  • Figure 9 is a section taken of B-B in Figure 5.
  • a road gritter device which is designated generally by reference 10, and which forms a unit which can be mounted onto a loading platform 11 of any suitable truck for use during the winter months, but which can be dismounted and kept in storage during the remainder of the year, thereby releasing the truck for other duties.
  • the device 10 may be constructed as an integral part of a specially designed vehicle. In either situation, the device 10 will be operated in order to distribute gritter material over the surface of a road when required.
  • This gritter material will usually comprise a mixture of a "salt" which serves to melt icy patches on the road, and grit or sand material which will improve tyre adhesion with the road surface.
  • the device 10 comprises a hopper body 12 which is assembled from a number of separately formed plates, at least some of which are made of rigid plastics material and which are releasably coupled together for replacement when required.
  • the entire wall structure of the hopper body 12 is assembled from separately formed plates of rigid plastics material which are releasably coupled together.
  • One practical embodiment of hopper body is shown in more detail in Figures 2 to 4.
  • a spinner disc assembly 13 which comprises a spinner disc 14 which is rotatable in a substantially horizontal plane in order to distribute laterally gritter material supplied thereto from the hopper body 12.
  • An endless conveyor 15 having an endless conveyor band 16 which runs through a longitudinal discharge slot formed in the bottom of the hopper body 12, and conveys gritter material from the hopper body 12 to the spinner disc 14.
  • a sheet of plastics material 17 is arranged below the conveyor 15 and is intended to shield the loading platform 11 of the truck from contact with any corrosive material present in the . ritter material.
  • the spinner disc 14 is carried at the lower end of a vertical shaft 18 which is driven so that gritter material falling onto the spinner disc 14 is discharged laterally by centrifugal action.
  • the upper surface of the spinner disc 14 may be provided with suitable radiating guide arms to promote the discharging action applied to the gritter material .
  • the separately formed plates from which the hopper body 12 is assembled are made of any suitable rigid plastics material which can withstand the arduous conditions to which the hopper body will be exposed, and one preferred material is a rigid plastics material supplied by Macpherson Polymers under the trade mark POLYETHER 2874/206.
  • the endless band 16 of the conveyor 15 may be formed of elastomeric material, or of plastics material, such as POLYETHER 2874/206, and serves to convey the gritter material to the spinner disc assembly 13. Any components of the conveyor 15 which are liable to become exposed in service to the action of the corrosive salt present in the gritter material may also be constructed of elastomeric or plastics material, such components including drive rollers and any idler rollers which may be provided.
  • the spinner disc 14 is also made of rigid plastics material, and so also may be the carrying shaft 18, so that these components will not be adversely affected by the gritter material.
  • Figure 1 is a schematic illustration of a road gritter device 10 which forms a unit or assembly which is readily mountable on, or can be dismounted from a loading platform of any suitable truck.
  • the device 10 can be fabricated as an integral part of a specially designed road gritter vehicle.
  • FIG. 2 to 4 Detailed structural features of one practicle construction of hopper body 12 is shown in Figures 2 to 4, in which reference A denotes upper side panels, reference B lower side panels, reference C side support panels, reference D end bottom corner panels, reference E end top corner panels and reference F front end centre panels.
  • FIGS. 5 to 9 illustrate detailed component parts of a rigid support frame for carrying the hopper body.

Abstract

There is disclosed a road gritter device (10) which forms a unit which can be mounted onto a loading platform (11) of a truck for use during the winter months, and which comprises a hopper body (12) assembled from a number of separately formed plates of rigid plastics material which are releasably coupled together for replacement when required. An endless conveyor (15) is arranged to convey gritter material from the hopper body (12) to a spinner disc assembly (13) which comprises a spinner disc (14) rotatable in a substantially horizontal plane in order to distribute laterally gritter material supplied thereto. The endless conveyor (15) has an endless conveyor band (16) made of plastics or elastomeric material, and preferably also the spinner disc (14) also is made of plastics material. Therefore, the major components of the road gritter device are made of plastics material which is not adversely affected by usual road gritter material incorporating 'salt', which otherwise can cause serious corrosion damage to existing designs of gritter devices fabricated from metal sheet and having metal spinner discs. By making the hopper body of an assembly of separate rigid sheets or plates of plastics material, damaged or worn sheets can readily be replaced.

Description

ROAD GRITTER DEVICE
This invention relates to a road gritter device which forms part of. or is adapted to be mounted on a transport vehicle, and which is operable to distribute particulate material over the surface of a road when required during icy conditions.
As is well known, the particulate material distributed over icy patches on roads usually comprises a suitable form of soluble "salt" which helps to melt any icy patches on a road, and sand or grit which improves vehicle tyre grip with icy and melting ice patches on the road. The material applied to roads in icy conditions is very effective and is a major contribution to road safety in the winter. However, the salt content of the distributed material is corrosive, and this is both a problem to road users in that it causes unseen underbody corrosion which can only be mitigated by regular underbody washing, and is also and more seriously a problem to the operators of the gritter devices.
Existing gritter devices generally comprise a storage hopper for the gritter material, a rotary grit distributor in the form of a spinner disc, and an endless conveyor for transferring the material from the hopper to the distributor. The entire device may form an integral part of a specially designed road gritter vehicle, or may form a de- ountable assembly which can be mounted onto a loading platform of any suitable truck for use during the winter months, but which can be dismounted and kept in storage during the remainder of the year, thereby releasing the truck for other duties.
The hopper is fabricated from metal plate or sheet, and the grit distributor is also made of metal, taking the form of a spinner disc which rotates in a horizontal plane and which is driven by a vertical shaft on which it is carried. .Given that the metal components of the existing gritter devices are exposed to direct and continuous contact with the corrosive salt content of the gritter material, these components are subjected to accelerated corrosive attack, when compared with the corrosive action applied to the vehicles bodies of road users, and this therefore involves substantial refurbishment of the component parts before each winter season commences.
Highway authorities employ considerable fleets of gritters, and the material and labour cost of each annual refurbishment amounts to a substantial amount.
There is therefore a clear need to provide a novel construction of road gritter device which is less susceptible to corrosive attack from the constituents of the gritter material which it is intended to distribute.
According to one aspect of the invention there is provided a road gritter device which forms part of, or is adapted to be mounted on a transport vehicle, and which is operable to distribute gritter material over the surface of a road when required, in which the device comprises: a hopper body for gritter material which is assembled from a plurality of separately formed plates, at least some of which are made of rigid plastics material and which are releasably coupled together for replacement when required; a spinner disc which is rotatable in a substantially horizontal plane in order to distribute laterally gritter material supplied thereto from the hopper; and, an endless conveyor arranged to convey gritter material from the hopper to the spinner disc.
According to a further aspect of the invention there is provided a road gritter device which forms part of, or is adapted to be mounted on a transport vehicle, and which is operable to distribute gritter material over the surface of a road when required, in which the device comprises: a hopper body for gritter material; a spinner disc which is rotatable in a substantially horizontal plane in order to distribute laterally gritter material supplied thereto from the hopper, the disc being made of a rigid. plastics material: and. an endless conveyor arranged to convey gritter material from the hopper to the spinner disc.
According to another aspect of the invention there is provided a road gritter device which forms part of. or is adapted to be mounted on a transport vehicle, and which is operable to distribute gritter material over the surface of a road when required, in which the device comprises: a hopper body for gritter material which is assembled from a plurality of separately formed plates, at least some of v/hich are releasably coupled together for replacement when required; a spinner disc which is rotatable in a substantially horizontal plane in order to distribute laterally gritter material supplied thereto from the hopper; and, an endless conveyor arranged to convey gritter material from the hopper to the spinner disc, an endless conveyor band of the conveyor being made of plastics or elastomeric material.
A road gritter device according to any of the above aspects of the invention is therefore better able to withstand the corrosive action of the usual "salt" which is present in road gritter material used in this country, since at least some of the component parts of the device are made of plastics material.
There is now available on the market a new type of plastics material which is rigid and robust, and which is capable of withstanding the arduous conditions to which it will be exposed in service as component parts of a road gritter device according to the invention.
A particular preferred material is a newly available plastics material obtainable from Macpherson Polymers under the trade name POLYETHER 2874/206. However, it is envisaged that there will be other types of plastics material which have sufficient resilience to withstand the arduous conditions to which they will be exposed, and yet which has sufficient rigidity to be fabricated into suitably robust form for long service. The use of plastics material in the fabrication of some or all of the major components of the road gritter device enables the device to function sa isfactorily and without any corrosive action from the contents of the gritter material.
Preferably, the hopper body is entirely fabricated from separately formed sheets or plates of rigid plastics material which are releasably coupled together, and in the event of any excessive wear occuring in service, or more usually in the event of impact damage by careless use, replacement sheets can readily be installed with only minimal "down time" of the gritter device.
The spinner disc is preferably carried at the lower end of a rotatable vertical shaft, and the entire disc will usually be made of suitable rigid plastics material, and so also may be the carrying shaft.
The endless conveyor may have most of its major components made of plastics material, such as the endless conveyor band, drive rollers and idle rollers, so as to minimise the opportunity for corrosive attack to take place.
A road gritter device according to the invention may form an integral component of a specially designed and constructed road gritter vehicle, but preferably will be formed as a demountable assembly which can be installed on a loading platform of any suitable truck which will be used for other duties during the seasons other than winter.
To prevent, or at least minimise the risks of corrosive attack upon the metal components of the loading platform, an underlying sheet of plastics material may be arranged below the gritter device and between it and the loading platform. Then, if any of the "salt" falls downwardly, either in powder form, or in solution following rain falling on the contents of the hopper, the underlying sheet will tend to shield the loading platform from contact with this corrosive medium.
When the hopper body is assembled entirely from plastics sheets coupled together, it will be preferable for the hopper body to be given additional rigidity by the provision of a rigid supporting frame which engages the upper edge margins of the side walls of the hopper body. This supporting frame may be fabricated from suitable metal sections which are rigidly assembled to form the required frame shape, and a usual mesh screen may be supported by this frame through which the gritter material will be loaded by bucket-mounted loaders.
The interior of the hopper body may also be provided with a spreader frame arranged near the lower part of the hopper body. This spreader frame will tend to bear part of the load of the gritter material, and also will facilitate smooth discharge of the material from the lower part of the hopper body onto the underlying endless conveyor.
A road gritter device according to the invention will now be described in detail, by way of example only, with reference to the accompanying drawings, in which:
Figure 1 is a diagrammatic side illustration of a road gritter device assembly mounted as a unit on a loading platform of a truck;
Figure 2 is a side view, to an enlarged scale, of a detailed embodiment of hopper body of the gritter device;
Figure 3 is a composite end elevational view of the hopper body;
Figure 4 is a cross sectional view through the hopper body;
Figure 5 is a plan view of a support frame for the hopper body;
Figure 6 is an end elevation of the support frame;
Figure 7 is a side elevation view of the support frame;
Figure 8 is a section taken on A-A in Figure 5: and. Figure 9 is a section taken of B-B in Figure 5.
Referring first to Figure 1 of the drawings, there is shown schematically a road gritter device according to the invention which is designated generally by reference 10, and which forms a unit which can be mounted onto a loading platform 11 of any suitable truck for use during the winter months, but which can be dismounted and kept in storage during the remainder of the year, thereby releasing the truck for other duties. However, as an alternative, the device 10 may be constructed as an integral part of a specially designed vehicle. In either situation, the device 10 will be operated in order to distribute gritter material over the surface of a road when required. This gritter material will usually comprise a mixture of a "salt" which serves to melt icy patches on the road, and grit or sand material which will improve tyre adhesion with the road surface.
The device 10 comprises a hopper body 12 which is assembled from a number of separately formed plates, at least some of which are made of rigid plastics material and which are releasably coupled together for replacement when required. Conveniently, the entire wall structure of the hopper body 12 is assembled from separately formed plates of rigid plastics material which are releasably coupled together. One practical embodiment of hopper body is shown in more detail in Figures 2 to 4.
A spinner disc assembly 13 is provided which comprises a spinner disc 14 which is rotatable in a substantially horizontal plane in order to distribute laterally gritter material supplied thereto from the hopper body 12.
An endless conveyor 15 having an endless conveyor band 16 which runs through a longitudinal discharge slot formed in the bottom of the hopper body 12, and conveys gritter material from the hopper body 12 to the spinner disc 14. A sheet of plastics material 17 is arranged below the conveyor 15 and is intended to shield the loading platform 11 of the truck from contact with any corrosive material present in the . ritter material.
The spinner disc 14 is carried at the lower end of a vertical shaft 18 which is driven so that gritter material falling onto the spinner disc 14 is discharged laterally by centrifugal action. The upper surface of the spinner disc 14 may be provided with suitable radiating guide arms to promote the discharging action applied to the gritter material .
The separately formed plates from which the hopper body 12 is assembled are made of any suitable rigid plastics material which can withstand the arduous conditions to which the hopper body will be exposed, and one preferred material is a rigid plastics material supplied by Macpherson Polymers under the trade mark POLYETHER 2874/206. The endless band 16 of the conveyor 15 may be formed of elastomeric material, or of plastics material, such as POLYETHER 2874/206, and serves to convey the gritter material to the spinner disc assembly 13. Any components of the conveyor 15 which are liable to become exposed in service to the action of the corrosive salt present in the gritter material may also be constructed of elastomeric or plastics material, such components including drive rollers and any idler rollers which may be provided.
The spinner disc 14 is also made of rigid plastics material, and so also may be the carrying shaft 18, so that these components will not be adversely affected by the gritter material.
Figure 1 is a schematic illustration of a road gritter device 10 which forms a unit or assembly which is readily mountable on, or can be dismounted from a loading platform of any suitable truck. Alternatively, the device 10 can be fabricated as an integral part of a specially designed road gritter vehicle.
Detailed structural features of one practicle construction of hopper body 12 is shown in Figures 2 to 4, in which reference A denotes upper side panels, reference B lower side panels, reference C side support panels, reference D end bottom corner panels, reference E end top corner panels and reference F front end centre panels.
Figures 5 to 9 illustrate detailed component parts of a rigid support frame for carrying the hopper body.

Claims

1. A road gritter device which forms part of, or is adapted to be mounted on a transport vehicle, and which is operable to distribute gritter material over the surface of a road when required, in which the device comprises: a hopper body for gritter material which is assembled from a plurality of separately formed plates, at least some of which are made of rigid plastics material and which are releasably coupled together for replacement when required; a spinner disc which is rotatable in a substantially horizontal plane in order to distribute laterally gritter material supplied thereto from the hopper: and, an endless conveyor arranged to convey gritter material from the hopper to the spinner disc.
2. A road gritter device which forms part of, or is adapted to be mounted on a transport vehicle, and which is operable to distribute gritter material over the surface of a road when required, in which the device comprises: a hopper body for gritter material; a spinner disc which is rotatable in a substantially horizontal plane in order to distribute laterally gritter material supplied thereto from the hopper, the disc being made of a rigid plastics material: and, an endless conveyor arranged to convey gritter material from the hopper to the spinner disc.
3. A road gritter device which forms part of, or is adapted to be mounted on a transport vehicle, and which is operable to distribute gritter material over the surface of a road when required, in which the device comprises: a hopper body for gritter material which is assembled from a plurality of separately formed plates, at least some of which are releasably coupled together for replacement when required; a spinner disc which is rotatable in a substantially horizontal plane in order to distribute laterally gritter material supplied thereto from the hopper; and. an endless conveyor arranged to convey gritter material from the hopper to the spinner disc, an endless conveyor band of the conveyor being made of plastics or elastomeric material.
4. A road gritter device according to any one of Claims 1 to 3, in which the hopper body is entirely fabricated from separately formed sheets or plates of rigid plastics material which are releasably coupled together.
5. A road gritter device according to any one of Claims 1 to 4, in which the spinner disc is carried at the lower end of a rotatable vertical shaft.
6. A road gritter device according to Claim 5, in which the entire disc is made of rigid plastics material.
7. A road gritter device according to Claim 5 ot 6, in which the carrying shaft is made of rigid plastics material .
8. A road gritter device according to any one of Claims 1 to 7, in which the endless conveyor band, drive rollers and idle rollers of the endless conveyor are made of plastics material.
9. A road gritter device according to any one of Claims 1 to 8, in which the device is formed as a demountable assembly which can be installed on a loading platform of a truck.
10. A road gritter device according to Claim 9 and mounted on the loading platform of a truck, in which an underlying sheet of plastics material is arranged below the gritter device and between the device and the loading platform.
11. A road gritter device according to Claim 4, in which additional rigidity is given to the hopper body by provision of a rigid supporting frame which engages the upper edge margins of the side walls of the hopper body.
12. A road gritter device according to Claim 11. in which the supporting frame is fabricated from metal sections, and a mesh screen is supported by this frame through which the gritter material can be loaded.
13. A road gritter device according to any one of Claims 1 to 12, in which the interior of the hopper body is provided with a spreader frame arranged near the lower part of the hopper body so as to bear part of the load of the gritter material, and to facilitate discharge of the material from the lower part of the hopper body onto the underlying endless conveyor.
PCT/GB1990/000350 1989-03-28 1990-03-08 Road gritter device WO1990011409A1 (en)

Priority Applications (4)

Application Number Priority Date Filing Date Title
CA002055603A CA2055603A1 (en) 1989-03-28 1990-03-08 Road gritter device
NO91913755A NO913755L (en) 1989-03-28 1991-09-25 ROAD SANDWRITING DEVICE.
GB9120482A GB2248759B (en) 1989-03-28 1991-09-26 Road gritter device
FI914570A FI914570A0 (en) 1989-03-28 1991-09-27 ANORDNING FOER ATT SANDA VAEG.

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
GB898906957A GB8906957D0 (en) 1989-03-28 1989-03-28 Road gritter device
GB8906957.9 1989-03-28

Publications (1)

Publication Number Publication Date
WO1990011409A1 true WO1990011409A1 (en) 1990-10-04

Family

ID=10654047

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/GB1990/000350 WO1990011409A1 (en) 1989-03-28 1990-03-08 Road gritter device

Country Status (6)

Country Link
EP (1) EP0465499A1 (en)
JP (1) JPH05500245A (en)
CA (1) CA2055603A1 (en)
FI (1) FI914570A0 (en)
GB (2) GB8906957D0 (en)
WO (1) WO1990011409A1 (en)

Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR1357788A (en) * 1963-02-28 1964-04-10 Anciens Etablissements Sadon Large capacity tank for corrosive products
US4124167A (en) * 1977-04-11 1978-11-07 Coleman Robert E Material spreader for mounting on a vehicle
US4253612A (en) * 1979-08-24 1981-03-03 Schulze Clayton E Spreader for cinders and the like
AU535023B2 (en) * 1979-10-09 1984-03-01 Incitec Investments Ltd. Tubular conveyor
EP0149274A1 (en) * 1984-01-03 1985-07-24 Nido-Universal Machines B.V. Dosing device comprising a tiltable crusher plate
NL8503375A (en) * 1985-12-06 1987-07-01 Terberg Machines Salt spreader for icy road surfaces - is removably mounted on truck load platform, and equipped for parking conditions
DE8709321U1 (en) * 1987-07-07 1987-08-27 Gummi-Stricker Paul-H. Stricker Gmbh & Co Kg, 4400 Muenster, De

Family Cites Families (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB8900767D0 (en) * 1989-01-13 1989-03-08 Transport Engineering Limited Vehicle mounted spreader

Patent Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR1357788A (en) * 1963-02-28 1964-04-10 Anciens Etablissements Sadon Large capacity tank for corrosive products
US4124167A (en) * 1977-04-11 1978-11-07 Coleman Robert E Material spreader for mounting on a vehicle
US4253612A (en) * 1979-08-24 1981-03-03 Schulze Clayton E Spreader for cinders and the like
AU535023B2 (en) * 1979-10-09 1984-03-01 Incitec Investments Ltd. Tubular conveyor
EP0149274A1 (en) * 1984-01-03 1985-07-24 Nido-Universal Machines B.V. Dosing device comprising a tiltable crusher plate
NL8503375A (en) * 1985-12-06 1987-07-01 Terberg Machines Salt spreader for icy road surfaces - is removably mounted on truck load platform, and equipped for parking conditions
DE8709321U1 (en) * 1987-07-07 1987-08-27 Gummi-Stricker Paul-H. Stricker Gmbh & Co Kg, 4400 Muenster, De

Also Published As

Publication number Publication date
EP0465499A1 (en) 1992-01-15
GB2248759A (en) 1992-04-22
GB9120482D0 (en) 1991-12-04
GB8906957D0 (en) 1989-05-10
FI914570A0 (en) 1991-09-27
GB2248759B (en) 1994-02-23
JPH05500245A (en) 1993-01-21
CA2055603A1 (en) 1990-09-29

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