Portable suction nozzle and holster therefor

Abstract

A portable suction nozzle for removing layers of fat, oil and grease (FOG), scum, sludge and the like from the surface or bottom of tanks used in water and sewage treatment plants, septic systems and the like. The device can be used by an operator working in such environments, as well as honey wagon operators, oil spill response teams and the like. The device can be held in place by a holster arrangement mounted to a tank to be cleaned.

Claims

1. Process for removing layers of fat, oil, grease and scum floating on water in a treatment tank used in water and sewage treatment plants, septic systems and the like which comprises: (a) providing access to the top of said treatment tank for a standing operator; (b) providing said operator with a handheld suction device the weight of which is born by said operator comprising: (i) a central collar member; (ii) a suction nozzle releasably connected to one side of said collar member having a nozzle end for removing layers of fat, oil, grease and scum floating on the water in said treatment tank, said nozzle having interchangeable, multiple varying lengths to allow the operator to select and connect a length to said collar which will position said nozzle end in a layer of fat, oil, grease and/or scum floating on the water in a treatment tank without extending into the underlying water; (iii) the other side of said collar member being releasably connected to a suction hose which leads to a suction source; (iv) lateral handles extending from opposite sides of said collar member without obstructing suction flow therethrough, said handles comprising a shaft with a resilient sleeve there over, said shaft having tensioning means which prevents rotation of said sleeve or allows it to rotate when a threshold amount of torque is applied by the operator; (v) said collar member and said suction nozzle having a combined length beginning from the extended arms of an operator standing at the top of said treatment tank gripping said handles and extending downward into a layer of fat, oil, grease and/or scum floating on the water in said treatment tank without extending into the underlying water; (vi) said collar member being releasable connected to said nozzle and said suction hose to facilitate disassembly, cleaning and storage of said collar, nozzle and suction hose; and (c) removing said layer of fat, oil, grease and/or scum by applying suction from from said suction source to said nozzle end while directing said nozzle end in said layer of fat, oil, grease and/or scum floating on the water in said treatment tank without extending into the underlying water.

2. Process of claim 1 wherein said nozzle end is cut at about a 45 degree angle to facilitate removal of said layers.

3. Process of claim 1 wherein said nozzle end has a castellated configuration with cutouts to facilitate removal of said layers.

4. Handheld suction device the weight of which can be born by an operator for removing layers of fat, oil, grease and scum floating on water in a treatment tank used in water and sewage treatment plants, septic systems and the like comprising: (a) a central collar member; (b) a suction nozzle releasably connected to one side of said collar member having a nozzle end for removing layers of fat, oil, grease and scum floating on the water in said treatment tank, said nozzle having interchangeable, multiple varying lengths to allow an operator to select and connect a length to said collar which will position said nozzle end in a layer of fat, oil, grease and/or scum floating on the water in a treatment tank without extending into the underlying water; (c) the other side of said collar member being releasably connected to a suction hose which leads to a suction source; (d) lateral handles extending from opposite sides of said collar member without obstructing suction flow therethrough, said handles comprising a shaft with a resilient sleeve there over, said shaft having tensioning means which prevents rotation of said sleeve or allows it to rotate when a threshold amount of torque is applied by the operator; (e) said collar member and said suction nozzle having a combined length beginning from the extended arms of an operator standing at the top of said treatment tank gripping said handles and extending downward into a layer of fat, oil, grease and/or scum floating on the water in said treatment tank without extending into the underlying water; and (f) said collar member being releasable connected to said nozzle and said suction hose to facilitate disassembly, cleaning and storage of said collar, nozzle and suction hose.

5. Device of claim 4 wherein said nozzle end is cut at about a 45 degree angle to facilitate removal of said layers.

6. Device of claim 4 wherein said nozzle end has a castellated configuration with cutouts to facilitate removal of said layers.

Description

BRIEF DESCRIPTION OF THE DRAWINGS

(1) One of the above and other aspects, novel features and advantages of the present invention will become apparent from the following detailed description of a preferred embodiment(s) of the invention, as illustrated in the drawings, in which:

(2) FIG. 1 is a perspective view showing one embodiment of the device of the invention;

(3) FIG. 2 is a perspective view showing a operator demonstrating how the device of FIG. 1 can be deployed;

(4) FIG. 3 is a cross section of a preferred handle assembly for use in the invention;

(5) FIGS. 4A-D are perspective views of a holster arrangement that can be used with the suction nozzle shown in FIG. 1;

(6) FIG. 5 is a cross sectional, top view of the arrangement shown in FIG. 4C showing details of a clamp to hold the nozzle in place while cleaning; and

(7) FIGS. 6A and B are side schematic views showing two nozzle configurations.

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENT(S) OF THE INVENTION

(8) FIG. 1 shows a collar 10 with a threaded female end which receives threaded male member 20 on one side thereof. Nozzle member 22 is threaded or glued into collar 20. Nozzle 22 is typically 3 inch PVC pipe of a desired length to suit the dimensions of a tank being cleaned. As shown in FIG. 6A, nozzle end 23 is preferably cut at about a 45 degree angle at the end 23 to facilitate removal of FOG etc. as shown. FIG. 6B shows an alternate nozzle end having a castellated configuration with cutouts 25, also to facilitate the removal of FOG etc. as shown.

(9) As shown in FIG. 2, lateral handles 18 extend from opposite sides of collar member 10 to enable a standing operator to bear the weight of the portable device consisting of collar 10, fitting 12, member 20 and handles 18, and a portion of suction hose 11 which leads away from the device.

(10) When griping handles 18, a standing operator, as shown in FIG. 2, is able to bear the weight of the device and a portion of the suction hose and direct nozzle 22 and nozzle end 23 into contact with FOG, scum, sludge and the like in a treatment tank to remove same in accordance with the invention.

(11) As further shown in FIG. 2, collar member 20 and suction nozzle 22 have a combined length beginning from the extended arms of a standing operator gripping handles 18 and extending downward to a point in a treatment tank where FOG, scum, sludge and the like are to be removed (see also FIGS. 6A and 6B).

(12) As shown in FIG. 2, lateral handles 18 extend from opposite sides of collar member 10 to enable a standing operator to bear the weight of the portable device consisting of collar 10, fitting 12, member 20 and handles 18, and a portion of suction hose 11 which leads away from the device.

(13) When griping handles 18, a standing operator, as shown in FIG. 2, is able to bear the weight of the device and a portion of the suction hose and direct nozzle 22 and nozzle end 23 into contact with FOG, scum, sludge and the like in a treatment tank to remove same in accordance with the invention.

(14) As further shown in FIG. 2, collar member 20 and suction nozzle 22 have a combined length beginning from the extended arms of a standing operator gripping handles 18 and extending downward to a point in a treatment tank where FOG, scum, sludge and the like are to be removed (see also FIGS. 6A and 6B).

(15) Collar 10 can be cast aluminum or cast stainless steel and can be made in one piece with collar member 20 for holding nozzle member 22.

(16) One the other end of collar 10, suction hose 11, shown in phantom, is attached which leads to a suction source such as a mobile suction pump and residue tank. Collar 10 can include a conventional cam lock fitting 12 for holding the suction hose in place.

(17) As shown in FIGS. 1 and 2, lateral handles 18 extend from both sides of collar 10 for gripping and directing the device by an operator. Handle 18 can include a threaded shaft 14 which is threaded into or bolted thru collar 10. Care should be taken when attaching the handles so as not to obstruct the flow from nozzle 22 thru collar 10 and into the suction hose 11.

(18) A resilient sleeve 19 fits over shaft 14 and is held in place with tension by bolt 16. The amount of tension can be varied by adjusting bolt 14 to prevent rotation of sleeve 19 or allow it to rotate when a threshold amount or torque is applied by the operator. Some degree of rotation can facilitate steering or turning of the device during a cleaning operation. Operators normally wear heavy work gloves when using the device of the invention and the sleeve 19 will preferably have a non-slip surface and a resilient construction to facilitate gripping and operation of the device.

(19) FIG. 3 shows a preferred handle having a threaded carriage bolt 30 screwed into threaded female opening 33 in casting boss 31 of collar 10. Washers 40, 40 are at either end and nut 37 and lock washer 39 are mounted between inboard washer 40 and boss 31. Protective sleeve 32 fits inside rigid sleeve 34 and can be omitted when shaft of bolt 30 is not threaded. Resilient sleeve 42, of rubber for example, fits over rigid sleeve 34 and is tensioned by adjusting integral nut head 35 of bolt 30. It is preferred to compress sleeve 42 to a point that it will not rotate. If desired, nut 35 can be adjusted to allow an operator to turn the handles against some resistance to facilitate turning or steering of the device in use. Bolt 30 and nut 35 can be adjusted to fit the needs a given operator. The head of carriage bolt 30 at the outer end of handless shown in FIG. 3 also protects the handles during rough use and dropping on hard surfaces.

(20) FIGS. 4A and B show one embodiment of a holster 50 having an upper collar 51 which is mounted in a desired location on or in a tank to be cleaned. Right angle bracket 54 can be secured, for example, to the top edge surface 56 of a tank by anchored bolts therein which extend through and holes 55 and are held in place by nuts and washers. Holster 50 is attached to bracket 54 via bolts 53 and U-bolt 56. If desired, anchor bolts can be placed at key locations around or in a tank which allows the holster assembly to be easily located at desired position to deploy the portable nozzle of the invention.

(21) In use, nozzle 22 is inserted into holster 50 until collar 20 rests on collar 51. While shown in a preferred vertical position, holster 50 can be mounted at various angles relative to the tank wall to suit conditions in the tank to be cleaned. Holster 50 allows for hands-free operation to clean a tank to remove FOG etc., as shown, for example in FIGS. 6A and B, thereby freeing the operator to use a high pressure hose or paddle to facilitate the overall cleaning operation.

(22) The vertical position of nozzle 22 in holster 50 can be adjusted to suit tank conditions using spacers S1, S2 or S3 which are placed on collar 51 before inserting nozzle 22 (FIG. 4B) or by using a clamp assembly 52 as shown in detail in FIGS. 4C and D and FIG. 5. Clamp 52 rests on collar 51 and engages nozzle 22 at any desired location as might be dictated by conditions in a tank to be cleaned. Clamp 52 includes U-bracket 64 which partially encircles nozzle 22. U-bracket 64, which can be steel or stainless steel, is secured via bolts 69 to side brackets 60 and clamping pressure is applied via nut 64 on bolt 62 which extends across and thru bracket 64 and side brackets 60. Bolt 62 is held in place by nut and lock washer 65. Spring 70 over the shaft of bolt 62 can be tensioned to assist relieving clamping pressure when it is desired to reposition nozzle 22.

(23) While this invention has been described as having preferred sequences, ranges, steps, materials, structures, shapes, configurations, features, components, or designs, it is understood that it is capable of further modifications, uses and/or adaptations of the invention following in general the principle of the invention, and including such departures from the present disclosure as those come within the known or customary practice in the art to which the invention pertains, and as may be applied to the central features hereinbefore set forth, and fall within the scope of the invention and of the limits of the appended claims.