Earth working – Convertible; or changeable by disassembly or assembly – Changeable by disassembly or assembly
Patent
1996-08-26
1998-09-15
Melius, Terry Lee
Earth working
Convertible; or changeable by disassembly or assembly
Changeable by disassembly or assembly
172817, 37407, 414912, A01B 6300
Patent
active
058066071
DESCRIPTION:
BRIEF SUMMARY
The invention relates to a device for skimming, particularly of a layer of skimmable material from a substrate such as a slow sand filter over which the device is in use traversed.
Slow sand filters are a well-established means of removing impurities from raw feed water, both "clean" and "dirty". They have however a high capital cost and require extensive land. Moreover, sand filters often become "clogged" with algae, debris and the like, and it is accordingly necessary to be able to clean the filter with as little disruption as possible. It is also necessary to be able to remove surplus sand from a filter, and granulated activated carbon where the filter comprises a "sandwich" of that material and sand.
According to a first aspect of the invention there is provided a device for skimming a layer from a substrate over which the device is in use traversed, characterised by a body defining an edge for skimming the substrate, a collector for material skimmed, and means for controlling the thickness of skim.
There may be a blade of the body defining the edge for skimming and the means for controlling the thickness of skim may comprise adjustable means for adjusting the position of the blade in relation to a fixed part of the device. This provides a relatively simple yet effective construction.
The fixed part of the device may comprise a rear wall of the device and the rear wall may be separated from a floor of the device by a gap through which skimmed material can pass. This provides a compact construction which is efficient for collectively skimmed material.
The blade may be mounted on a forward surface of the rear wall, or, alternatively the blade may be mounted on a rear surface of the rear wall of the device. Either construction is effective in skimming and adjusting the depth of skim.
The adjustable means may comprise an arrangement of a series of holes and a bolt means for passing through aligned holes. This is a simple yet effective mounting means.
The adjusting means may alternatively comprise a lifting arrangement for moving the blade bodily upwardly or downwardly, particularly a manually operable rotatable shaft and gear box arrangement.
The device may comprise an undersurface with a high slip surface, particularly a surface of a stainless steel skid part of the body of the device. This provides for ease of traverse over a substrate and tends to obviate any ploughing tendency.
The body may have pivot means for pivotal movement of the device in relation to a dozer blade.
There may be releasable clamping means whereby the device is releasably mountable on apparatus for moving the device. This provides for the device being an independent unit.
The apparatus may comprise a dozer having a dozer blade, and the clamping means may comprise toggle means for clamping to the blade.
There may be inter-slidable blocks for effecting clamping at at least one edge.
One block may be mountable in a hole in the dozer blade.
There may be a clamp plate adapted to clamp a part of the dozer blade opposite the clamp blocks.
The body may comprise a substantially U-shaped member the limbs and web of which comprise the collector and a lower (in use) edge of the web comprising the skimming edge.
There may be a skid or a plurality of skids mounted on a leading edge of the device.
There may be a plurality of forwardly projecting tines for collecting weed. This provides a particularly efficient construction.
According to a further aspect, the invention provides in combination, a dozer blade and a device as hereinbefore defined.
According to a further aspect, the invention provides a dozer, including a combination as hereinbefore defined.
Devices embodying the invention are hereinafter described, by way of example, with reference to the accompanying drawings.
FIG. 1 is a schematic perspective view from the rear of a device according to the invention mounted on a dozer blade;
FIG. 2 is, to an enlarged scale, a perspective view of in front of the device shown in FIG. 1;
FIG. 3 is a side elevational view of the device of FIGS. 1 and 2,
REFERENCES:
patent: 2309223 (1943-01-01), Staring
patent: 2428857 (1947-10-01), Smith
patent: 2613912 (1952-10-01), Jordan
patent: 2824391 (1958-02-01), Roemer
patent: 2896343 (1959-07-01), Raby
patent: 3034238 (1962-05-01), McGee
patent: 3163945 (1965-01-01), Dooley
patent: 3209475 (1965-10-01), Salna
patent: 3258864 (1966-07-01), Beyers
patent: 4179227 (1979-12-01), Child, Jr. et al.
patent: 4201000 (1980-05-01), Stanford
patent: 4241525 (1980-12-01), Mann
patent: 4372063 (1983-02-01), Work
patent: 4597205 (1986-07-01), Guest
patent: 4655297 (1987-04-01), Bourgeois, Jr.
patent: 5191943 (1993-03-01), Minor et al.
patent: 5273375 (1993-12-01), Plourde
patent: 5367796 (1994-11-01), Bowers et al.
patent: 5397200 (1995-03-01), Seal
patent: 5416990 (1995-05-01), Otwell
patent: 5526591 (1996-06-01), Otwell
Batson Victor
Melius Terry Lee
Thames Water Utilities Limited
LandOfFree
Device for skimming does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Device for skimming, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Device for skimming will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-78807