US20220047972A1 - Strainer and an associated pumping method - Google Patents
Strainer and an associated pumping method Download PDFInfo
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- US20220047972A1 US20220047972A1 US17/512,532 US202117512532A US2022047972A1 US 20220047972 A1 US20220047972 A1 US 20220047972A1 US 202117512532 A US202117512532 A US 202117512532A US 2022047972 A1 US2022047972 A1 US 2022047972A1
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- strainer
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- hose
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Images
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D29/00—Filters with filtering elements stationary during filtration, e.g. pressure or suction filters, not covered by groups B01D24/00 - B01D27/00; Filtering elements therefor
- B01D29/11—Filters with filtering elements stationary during filtration, e.g. pressure or suction filters, not covered by groups B01D24/00 - B01D27/00; Filtering elements therefor with bag, cage, hose, tube, sleeve or like filtering elements
- B01D29/31—Self-supporting filtering elements
- B01D29/33—Self-supporting filtering elements arranged for inward flow filtration
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16L—PIPES; JOINTS OR FITTINGS FOR PIPES; SUPPORTS FOR PIPES, CABLES OR PROTECTIVE TUBING; MEANS FOR THERMAL INSULATION IN GENERAL
- F16L55/00—Devices or appurtenances for use in, or in connection with, pipes or pipe systems
- F16L55/24—Preventing accumulation of dirt or other matter in the pipes, e.g. by traps, by strainers
Definitions
- the present invention relates to a strainer that may be attached to the end of a hose into which liquid is to be pumped and an associated pumping method.
- Embodiments of the present invention find application, though not exclusively, in contexts such as mining and firefighting.
- a strainer it is known to attach a strainer to the inlet of a hose when attempting to pump liquids such as water, which may be muddy and may also be contaminated with foreign objects such as rocks and stones, etc.
- liquids such as water, which may be muddy and may also be contaminated with foreign objects such as rocks and stones, etc.
- the end of the hose to which the strainer is attached is immersed within the liquid that is to be pumped.
- the purpose of the strainer is to strain out larger contaminants so that the water that is sucked by the pump into the hose only contains contaminants that are small enough to pass through the strainer.
- prior art strainers typically suffer from a number of disadvantages such as difficulties associated with the unclogging of contaminants and a vulnerability to crushing or breakage.
- the latter of these issues is particularly prevalent in a mining contexts, such as coal mining by way of non-limiting example, in which there is an appreciable risk of the strainer being run over and crushed by heavy machinery.
- a strainer for attachment to an inlet of a hose, the strainer including: a body defining a plurality of inlet holes, each of the inlet holes being in fluid communication with a hollow internal chamber; and an outlet being in fluid communication with the hollow internal chamber, the outlet being to attach to the inlet of the hose; wherein the body is formed from a resilient deformable material configured to bring opposed sides of the internal chamber into contact with each other in response to application of a compressive force prior to the body resiliently returning substantially to its pre-deformation shape when the compressive force is no longer applied; and wherein each of the holes defines a perimeter and wherein each of the holes is extensible so as to extend the perimeter by at least 20%.
- the resilient deformable material is, or includes, an elastomeric polymer. In another embodiment the resilient deformable material is, or includes, a rubber, synthetic rubber or rubber-like material. In yet another embodiment the resilient deformable material is, or includes, polychloroprene. In yet another embodiment the resilient deformable material is, or includes, nitrile.
- a method of pumping a liquid including: providing a pump attached to a hose, the hose having a distal end defining an inlet; providing a strainer including: a body defining a plurality of inlet holes, each of the inlet holes being in fluid communication with a hollow internal chamber; and an outlet being in fluid communication with the hollow internal chamber, the outlet being for attachment to the inlet of the hose; wherein the body is formed from a resilient deformable material to bring opposed sides of the internal chamber into contact with each other in response to the application of a compressive force prior to the body resiliently returning substantially to its pre-deformation shape when the force is no longer applied and wherein each of the holes defines a perimeter and wherein each of the holes is extensible so as to extend the perimeter by at least 20%; attaching the outlet of the strainer to the inlet of the hose; operating the pump to suck the liquid into the plurality of holes, through the hollow chamber, out the outlet, and into the hose; and periodically
- the method includes periodically reversing the flow direction of the pump such that liquid is pumped out of the holes so as to dislodge contaminants clogging the holes.
- FIG. 1 is a plan view of a first embodiment of the strainer
- FIG. 2 is a cross sectional view of the first embodiment of the strainer, with the cross section taken through line A-A of FIG. 1 ;
- FIG. 3 is a cross sectional view of the first embodiment of the strainer, with the cross section taken through line B-B of FIG. 1 ;
- FIG. 4 is a perspective view of a second embodiment of the strainer
- FIG. 5 is a plan view of the second embodiment of the strainer
- FIG. 6 is a plan view of the second embodiment of the strainer showing some hidden detail
- FIG. 7 is a cross sectional plan view of the second embodiment, with the cross section being taken through line 7 - 7 of FIG. 5 ;
- FIG. 8 is a rear view depicting the proximal end of the second embodiment
- FIG. 9 is a front view depicting the distal end of the second embodiment.
- FIG. 10 is a front view of the second embodiment showing some hidden detail comprising the positions of the holes 3 .
- the first embodiment of the strainer 1 has a body 2 that defines a plurality of inlet holes 3 .
- Each of the inlet holes 3 is in fluid communication with a hollow internal chamber 4 .
- the circular outlet 5 of the strainer is in fluid communication with the hollow internal chamber 4 .
- the strainer 1 is immersed within a liquid that is desired to be pumped. Suction is then provided by a pump (not illustrated) so as to suck the liquid through the plurality of holes 3 , thereby straining out larger contaminants, such as rocks and stones. The liquid flows through the holes 3 , into the hollow internal chamber 4 and then out the outlet 5 .
- the outlet 5 is typically attached to the inlet of the hose (not illustrated) that is connected to the pump.
- a coupling component in the form of metal ring 7 that is made from 304-316 stainless steel, is embedded within the material that forms the outlet 5 and the remainder of the strainer 1 .
- Connection of the strainer's outlet 5 to the hose is achieved via a hose coupling device (not illustrated), which defines a boss that is shaped to receive the outlet 5 of the strainer 1 .
- a pair of cams are disposed on opposite sides of the boss such that, once the outlet 5 of the strainer 1 has been inserted into the boss, the cams are rotated so as to impinge into a groove 6 that extends circumferentially around the strainer 1 immediately adjacent to the embedded metal ring 7 .
- the impinging cams retain the metal ring 7 within the boss, thereby connecting the strainer 1 to the hose coupling device.
- the cams are rotated in the opposite direction so as to provide clearance for the outlet 5 and its embedded metal ring 7 to be withdrawn from the boss.
- the hose coupling device has a shaft that is sized so as to be inserted into the hose.
- the shaft includes a plurality of ridges that are shaped so as to resist withdrawal of the hose.
- a screw thread is formed adjacent the outlet of the strainer. This allows the outlet of the strainer to be screwed into a corresponding screw thread that is provided within a boss of a hose connection device.
- the body 2 and indeed the entire strainer 1 with the exception of the metal ring 7 , is formed from a resilient deformable material.
- the deformability of the material is such that opposed sides 8 and 9 of the internal chamber 4 can be brought into contact with each other in response to the application of a compressive force. Once the force is no longer being applied, the resilience of the material allows the body 2 to resiliently return to substantially its pre-deformation shape.
- the embodiment has passed a test that involved the application of a 100 tonne compressive force.
- the application of a 100 tonne compressive force causes the hollow internal chamber to be crushed substantially flat prior to the body resiliently returning substantially to its pre-deformation shape when the compressive force is no longer applied.
- the strainer 1 is capable of surviving the application of the type of substantial compressive force that may be experienced in a mining context, such as being run over by a heavy hauling mining vehicle.
- the prior art strainers of which the applicant is aware which would be crushed and rendered unusable by the application of such a compressive force.
- the prior art strainers are typically made from either metal or a hard plastics material.
- the resilient deformable material of the embodiment has a Young's modulus of less than a Young's modulus of metal or a Young's modulus of a hard plastics material.
- the reduced risk of damaging the embodiment gives rise to practical benefits such as longer service life and reduced labour costs and down time associated with the repair or replacement of broken strainers. Additionally, the reduced risk of damaging the embodiment reduces the risk that broken parts of the strainer 1 may be sucked into the hose and then into the pump, which advantageously reduces the risk of damaging the pump.
- the resilient deformable material from which the strainer 1 is made includes an elastomeric polymer such as a rubber, synthetic rubber or rubber-like material. More particularly, in one embodiment the material is formed from a combination of: standard Malaysian rubber, such as SMR10; an activator such as zinc oxide and/or stearic acid; an accelerator such as N-cyclohexyl-2-benzothiazole sulphonamide (which is also known by those skilled in the art as CBS); a crosslinking agent such as sulphur; a processing aid such as Struktol A 60 (which is used to reduce viscosity); process oil such as a paraffinic oil; a wax such as a paraffinic wax; an antioxidant and antiozonant such as N-(1,3-Dimethylbutyl)-N′-phenyl-p-phenylenediamine (which is also known by those skilled in the art as 6PPD) and/or N-Isoprop
- the resilient deformable material includes polychloroprene (which is also referred to by those skilled in the art as neoprene). More particularly, in this embodiment the resilient deformable material is formed from a combination of: polychloroprene; a cure system and crosslinking agent such as zinc oxide and/or Ethylene thiourea (which is also known by those skilled in the art as ETU) and/or Tetramethylthiuram disulfid (which is also known by those skilled in the art as TMTD); a processing aid such as stearic acid and/or Struktol WB212 (which is used as an emulsion plasticizer dispersing and processing additive); a flame retardant such as antimony trioxide and/or chlorinated polyethylene and/or alumina trihydrate and/or zinc borate; an acid acceptor such as magnesium oxide; an antioxidant and antiozonant such as N-(1,3-Dimethylbutyl)-N′-phenyl-p-pheny
- the resilient deformable material is, or includes, nitrile, which is an organic compound that has a functional group.
- the material must be soft enough to deform in response to compressive forces; however hard enough to resist collapsing due to the vacuum created by the pump.
- the resilient deformable material preferably has a Shore A hardness of between 45 and 70 and the embodiment has a Shore A hardness of 55.
- the material it is preferable for the material to be UV resistant, petrochemical resistant, heat resistant, fire retardant and to have antistatic properties. With regard to petrochemical resistance, the natural rubber material has fairly poor properties. However, the polychloroprene-based material has good to excellent petrochemical resistance. Additionally, the material may be operated in ambient temperatures ranging from ⁇ 66° C. to +100° C.
- the natural rubber-based material has a tensile strength of approximately 19 Mpa and can be extended by up to 450% before breakage.
- the polychloroprene-based material has a tensile strength of approximately 16.9 Mpa and can be extended by up to 375% before breaking.
- the embodiment of the strainer 1 is formed using an injection moulding process using an ENGEL 150 Tonne Clamp injection moulding machine, which has two cavities.
- the cavities hold dies that are shaped in the negative form of the strainer 1 and each die includes a central post that forms the hollow internal chamber 4 of the strainer 1 .
- a metal ring 7 Prior to injection of the material, a metal ring 7 is placed into each of the cavities so as to rest on the central post and the metal rings are retained in position by clipping onto studs. If using the natural rubber-based material, then it is heated to 170° C. prior to injection. Alternatively, if the polychloroprene-based material is being used, then it is heated to a pre-injection temperature of 175° C.
- the heated material is then injected into each of the cavities to make two of the strainers 1 . If using the natural rubber-based material, then 0.976 litres of material per unit is injected into each cavity. Alternatively, if the polychloroprene-based material is being used, then 0.965 litres of material per unit is injected into each cavity.
- the strainer 1 is of a unitary construction, which allows for quicker connection of the strainer 1 onto the hose as compared to the prior art strainers of which the applicant is aware. More particularly, the prior art strainer are formed in two parts which must be screwed together when being installed in situ. The embodiment dispenses with the requirement for the installer to screw two separate parts together, which helps minimise the labour costs associated with installing and replacing the strainers.
- the combined cross sectional area of the plurality of holes 3 is preferably between 2 and 14 times the cross sectional area of the outlet 5 . Such a ratio is desirable to provide the strainer 1 with a suitable resistance against blockage.
- the first embodiment has a total of 240 holes, which are arranged in 10 rows, each having 24 holes. Each of the holes 3 is 5 mm in diameter and therefore has a cross sectional area of 19.635 mm 2 . Hence, the total cross sectional area of the plurality of holes 3 is 4712 mm 2 . At its narrowest (i.e. at a cross section taken in the middle of the groove 6 ), the outlet is 38 mm in diameter, which gives the outlet a cross sectional area of 1134 mm 2 . Hence, in the first embodiment the total cross sectional areas of the plurality of holes is 4.15 times the cross sectional area of the outlet 5 .
- the light weight of the embodiment is another advantage as compared to typical prior art strainers.
- the embodiment of the strainer 1 weighs less than 1 kg. More specifically, the weight of the embodiment is approx. 370 grams; whereas the prior art metal strainers typically weigh about 2.5 kg
- the body 2 is in the form of a cylindrical shaft defining a distal end 10 and a proximal end 11 .
- a tapered head 12 is disposed at the distal end 10 .
- the outlet 5 is at the proximal end 11 .
- the tapered head 12 improves the resistance of strainer 1 against the vacuum created by the pump as compared to the resistance that would be provided by a squared off head. That is, the tapered head 12 provides support to maintain the distal end 10 of the body 5 in a cylindrical configuration despite the vacuum created by the pump. This support also helps the strainer to return to its shape quicker after the body 5 has been deformed by a compressive force.
- Another advantage associated with the tapered head is that it lessens the risk of the strainer 1 being folded in on itself by the vacuum created by the pump.
- the tapered head defines an included angle of between 40° and 70° and in the embodiment this angle is 56°.
- the embodiment does not have any sharp edges. This, in addition to the deformability of the material from which the embodiment is predominantly made, helps improve safety for the personnel and reduce the risk of damage to the equipment in the work place in which the strainer 1 is being used.
- the method of using the strainer 1 when pumping a liquid typically involves attaching a proximal end of a hose to a pump, with the distal end of the hose defining an inlet.
- the outlet 5 of the strainer 1 is attached to the inlet of the hose and then the strainer is immersed within the liquid that is to be pumped.
- the pump is then operated so as to suck the liquid into the plurality of holes 3 , through the hollow chamber 4 , out the outlet 5 and into the hose.
- the flow direction of the pump is reversed so as to pump an amount of liquid, which is typically between 2 to 10 litres, out of the holes 3 and thereby dislodge any contaminants that may be clogging the holes 3 .
- the operator may periodically detach the strainer 1 and impact it against a solid object so as to dislodge any contaminants that may be clogging the holes 3 .
- the impacting of the strainer 1 against a solid object is unlikely to damage either the strainer 1 , or the object, due to the deformability of the material from which the strainer 1 is formed.
- Each of the holes 3 has a perimeter of 15.7 mm Preferably each of these perimeters is extensible by at least 20%. As mentioned above, this degree of extensibility is easily achieved by the material from which the embodiment is made, which has been tested to withstand extension by up to 450% in the case of the natural rubber-based material and up to 375% in the case of the polychloroprene-based material.
- the deformability and extensibility of the holes 3 is advantageous because it facilitates the methods outlined in the preceding paragraph for unclogging of the holes 3 if they get clogged with contaminants such as stones, etc.
- the deformability and extensibility of the material allows the holes 3 to expand and re-shaped themselves as required to help eject the contaminants in response to either a reversal of the direction of flow of the pump or in response to impacting of the strainer 1 against a solid object.
- the stiffness of the holes in the prior art strainers can render them substantially more difficult to unclog.
- FIGS. 4 to 9 A second embodiment of the strainer 13 is shown in FIGS. 4 to 9 . Portions of the second embodiment that are similar to those described above in relation to the first embodiment have been labelled with the same reference numerals as used in FIGS. 1 to 3 .
- the second embodiment differs in that it is longer than that of the first embodiment.
- the length of the strainer 13 is 370 mm from the proximal end 11 to the distal end 10 (compared to 325 mm in the first embodiment). It will, of course, be appreciated that other embodiments may have differing dimensions.
- each of the holes 3 of the second embodiment are 8 mm in diameter (compared to 5 mm in the first embodiment).
- the second embodiment has a total of 230 holes.
- the total cross sectional area of the plurality of holes 3 in the second embodiment is 11,561 mm 2 , which is substantially greater than the 4,712 mm 2 of the first embodiment.
- the dimensions of the outlet 5 of the second embodiment are identical to those of the first embodiment. That is, at its narrowest, the outlet 5 is 38 mm in diameter, which gives the outlet a cross sectional area of 1134 mm 2 .
- the total cross sectional area of the plurality of holes is 10.2 times the cross sectional area of the outlet 5 .
- the second embodiment is less likely to become clogged to such an extent that the total flow through the strainer 13 is appreciably reduced.
- the second embodiment has ten projections 14 spaced equally around the body 2 .
- the projections 14 are respectively positioned between each of the rows of holes 3 .
- Each of the projections 14 is in the form of a rib that extends radially away from the centre of the cylindrical body 2 . This maintains a clearance gap between the lowermost holes 3 and a surface upon which the strainer 13 is resting.
- the strainer 13 typically rests upon the bottom of a body of water with at least two of the ribs 13 making contact with the bottom. Hence, those two ribs hold the lowermost holes 3 up from the bottom of the body of water. This helps to avoid the restriction to the flow through the lowermost holes 3 that would otherwise occur if the lowermost holes 3 were allowed to rest directly against the bottom of the body of water.
- ribs 14 Another advantage associated with the ribs 14 is their contribution to increasing the structural integrity of the strainer 13 and in particular the ribs 14 provide the strainer 13 with further resistance against being sucked inside-out by the pumping vacuum. Additionally, the presence of the ribs 14 helps to keep any larger objects that may be floating within the body of water away from the inlet holes 3 . That is, the presence of the ribs 14 ensures that only objects that are smaller than the gap between two adjacent ribs 14 can get close to the holes 3 , as shown for example in FIG. 10 .
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- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Chemical & Material Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Filtration Of Liquid (AREA)
- Structures Of Non-Positive Displacement Pumps (AREA)
- Filtering Materials (AREA)
- Reciprocating Pumps (AREA)
- Investigating Or Analysing Biological Materials (AREA)
Abstract
As shown for example in FIG. 5, the strainer 13 has a body 2 that defines a plurality of inlet holes 3 each having a perimeter that is extensible by at least 20%. Each of the inlet holes 3 is in fluid communication with a hollow internal chamber. In use, liquid is sucked through the holes 3, thereby straining out larger contaminants such as rocks and stones, into the hollow internal chamber and then out the outlet. The majority of the strainer 13 is formed from a resilient deformable material that allows opposed sides of the internal chamber to be brought into contact with each other in response to the application of a compressive force. Once the force is no longer being applied, the resilience of the material allows the body 2 to resiliently return to substantially its pre-deformation shape.
Description
- This application is a continuation of pending U.S. patent application Ser. No. 15/561,020, filed Sep. 22, 2017, entitled “A Strainer and an Associated Pumping Method”, which claims the benefit of PCT Application Number AU2016/050160, filed Mar. 8, 2016, which claims the benefit of Australian Patent Application Number 2015901050, filed Mar. 24, 2015 and Australian Patent Application Number 2015902356, filed Jun. 19, 2015. The aforementioned applications are hereby incorporated herein by reference.
- The present invention relates to a strainer that may be attached to the end of a hose into which liquid is to be pumped and an associated pumping method. Embodiments of the present invention find application, though not exclusively, in contexts such as mining and firefighting.
- Any discussion of documents, acts, materials, devices, articles or the like which has been included in this specification is solely for the purpose of providing a context for the present invention. It is not to be taken as an admission that any or all of these matters form part of the prior art base or were common general knowledge in the field relevant to the present invention as it existed in Australia or elsewhere before the priority date of this application.
- It is known to attach a strainer to the inlet of a hose when attempting to pump liquids such as water, which may be muddy and may also be contaminated with foreign objects such as rocks and stones, etc. The end of the hose to which the strainer is attached is immersed within the liquid that is to be pumped. The purpose of the strainer is to strain out larger contaminants so that the water that is sucked by the pump into the hose only contains contaminants that are small enough to pass through the strainer.
- The inventors of the present application have appreciated that prior art strainers typically suffer from a number of disadvantages such as difficulties associated with the unclogging of contaminants and a vulnerability to crushing or breakage. The latter of these issues is particularly prevalent in a mining contexts, such as coal mining by way of non-limiting example, in which there is an appreciable risk of the strainer being run over and crushed by heavy machinery.
- It is an object of the present invention to overcome, or substantially ameliorate, one or more of the disadvantages of the prior art, or to provide a useful alternative.
- In one aspect of the present invention there is provided a strainer for attachment to an inlet of a hose, the strainer including: a body defining a plurality of inlet holes, each of the inlet holes being in fluid communication with a hollow internal chamber; and an outlet being in fluid communication with the hollow internal chamber, the outlet being to attach to the inlet of the hose; wherein the body is formed from a resilient deformable material configured to bring opposed sides of the internal chamber into contact with each other in response to application of a compressive force prior to the body resiliently returning substantially to its pre-deformation shape when the compressive force is no longer applied; and wherein each of the holes defines a perimeter and wherein each of the holes is extensible so as to extend the perimeter by at least 20%.
- In one embodiment the resilient deformable material is, or includes, an elastomeric polymer. In another embodiment the resilient deformable material is, or includes, a rubber, synthetic rubber or rubber-like material. In yet another embodiment the resilient deformable material is, or includes, polychloroprene. In yet another embodiment the resilient deformable material is, or includes, nitrile.
- According to another aspect of the present invention there is provided a method of pumping a liquid including: providing a pump attached to a hose, the hose having a distal end defining an inlet; providing a strainer including: a body defining a plurality of inlet holes, each of the inlet holes being in fluid communication with a hollow internal chamber; and an outlet being in fluid communication with the hollow internal chamber, the outlet being for attachment to the inlet of the hose; wherein the body is formed from a resilient deformable material to bring opposed sides of the internal chamber into contact with each other in response to the application of a compressive force prior to the body resiliently returning substantially to its pre-deformation shape when the force is no longer applied and wherein each of the holes defines a perimeter and wherein each of the holes is extensible so as to extend the perimeter by at least 20%; attaching the outlet of the strainer to the inlet of the hose; operating the pump to suck the liquid into the plurality of holes, through the hollow chamber, out the outlet, and into the hose; and periodically detaching the strainer and impacting the strainer against a solid object to dislodge contaminants clogging the holes.
- Preferably the method includes periodically reversing the flow direction of the pump such that liquid is pumped out of the holes so as to dislodge contaminants clogging the holes.
- The features and advantages of the present invention will become further apparent from the following detailed description of embodiments, provided by way of example only, together with the accompanying drawings.
-
FIG. 1 is a plan view of a first embodiment of the strainer; -
FIG. 2 is a cross sectional view of the first embodiment of the strainer, with the cross section taken through line A-A ofFIG. 1 ; -
FIG. 3 is a cross sectional view of the first embodiment of the strainer, with the cross section taken through line B-B ofFIG. 1 ; -
FIG. 4 is a perspective view of a second embodiment of the strainer; -
FIG. 5 is a plan view of the second embodiment of the strainer; -
FIG. 6 is a plan view of the second embodiment of the strainer showing some hidden detail; -
FIG. 7 is a cross sectional plan view of the second embodiment, with the cross section being taken through line 7-7 ofFIG. 5 ; -
FIG. 8 is a rear view depicting the proximal end of the second embodiment; -
FIG. 9 is a front view depicting the distal end of the second embodiment; and -
FIG. 10 is a front view of the second embodiment showing some hidden detail comprising the positions of theholes 3. - With reference to
FIGS. 1 to 3 , the first embodiment of thestrainer 1 has abody 2 that defines a plurality ofinlet holes 3. Each of theinlet holes 3 is in fluid communication with a hollowinternal chamber 4. Thecircular outlet 5 of the strainer is in fluid communication with the hollowinternal chamber 4. In use, thestrainer 1 is immersed within a liquid that is desired to be pumped. Suction is then provided by a pump (not illustrated) so as to suck the liquid through the plurality ofholes 3, thereby straining out larger contaminants, such as rocks and stones. The liquid flows through theholes 3, into the hollowinternal chamber 4 and then out theoutlet 5. - In use, the
outlet 5 is typically attached to the inlet of the hose (not illustrated) that is connected to the pump. A coupling component, in the form ofmetal ring 7 that is made from 304-316 stainless steel, is embedded within the material that forms theoutlet 5 and the remainder of thestrainer 1. Connection of the strainer'soutlet 5 to the hose is achieved via a hose coupling device (not illustrated), which defines a boss that is shaped to receive theoutlet 5 of thestrainer 1. A pair of cams are disposed on opposite sides of the boss such that, once theoutlet 5 of thestrainer 1 has been inserted into the boss, the cams are rotated so as to impinge into agroove 6 that extends circumferentially around thestrainer 1 immediately adjacent to the embeddedmetal ring 7. The impinging cams retain themetal ring 7 within the boss, thereby connecting thestrainer 1 to the hose coupling device. To release thestrainer 1, the cams are rotated in the opposite direction so as to provide clearance for theoutlet 5 and its embeddedmetal ring 7 to be withdrawn from the boss. At the opposite end to the boss, the hose coupling device has a shaft that is sized so as to be inserted into the hose. The shaft includes a plurality of ridges that are shaped so as to resist withdrawal of the hose. - Other embodiments of the invention utilise varying means to connect the strainer to the hose. For example, in another embodiment (not illustrated) a screw thread is formed adjacent the outlet of the strainer. This allows the outlet of the strainer to be screwed into a corresponding screw thread that is provided within a boss of a hose connection device.
- The
body 2, and indeed theentire strainer 1 with the exception of themetal ring 7, is formed from a resilient deformable material. The deformability of the material is such that opposedsides internal chamber 4 can be brought into contact with each other in response to the application of a compressive force. Once the force is no longer being applied, the resilience of the material allows thebody 2 to resiliently return to substantially its pre-deformation shape. - The embodiment has passed a test that involved the application of a 100 tonne compressive force. As will be appreciated by those skilled in the art, the application of a 100 tonne compressive force causes the hollow internal chamber to be crushed substantially flat prior to the body resiliently returning substantially to its pre-deformation shape when the compressive force is no longer applied. Hence, in use, the
strainer 1 is capable of surviving the application of the type of substantial compressive force that may be experienced in a mining context, such as being run over by a heavy hauling mining vehicle. This compares favourably with the prior art strainers of which the applicant is aware, which would be crushed and rendered unusable by the application of such a compressive force. This is because the prior art strainers are typically made from either metal or a hard plastics material. Advantageously, the resilient deformable material of the embodiment has a Young's modulus of less than a Young's modulus of metal or a Young's modulus of a hard plastics material. - The reduced risk of damaging the embodiment gives rise to practical benefits such as longer service life and reduced labour costs and down time associated with the repair or replacement of broken strainers. Additionally, the reduced risk of damaging the embodiment reduces the risk that broken parts of the
strainer 1 may be sucked into the hose and then into the pump, which advantageously reduces the risk of damaging the pump. - In one embodiment the resilient deformable material from which the
strainer 1 is made (with the exception of the metal ring 7) includes an elastomeric polymer such as a rubber, synthetic rubber or rubber-like material. More particularly, in one embodiment the material is formed from a combination of: standard Malaysian rubber, such as SMR10; an activator such as zinc oxide and/or stearic acid; an accelerator such as N-cyclohexyl-2-benzothiazole sulphonamide (which is also known by those skilled in the art as CBS); a crosslinking agent such as sulphur; a processing aid such as Struktol A 60 (which is used to reduce viscosity); process oil such as a paraffinic oil; a wax such as a paraffinic wax; an antioxidant and antiozonant such as N-(1,3-Dimethylbutyl)-N′-phenyl-p-phenylenediamine (which is also known by those skilled in the art as 6PPD) and/or N-Isopropyl-N′-phenyl-p-phenylenediamine (which is also known by those skilled in the art as IPPD and which is used to protect the rubber); and semi re-enforcing carbon black such as N774 (which is used to increase tensile strength). - In another embodiment the resilient deformable material includes polychloroprene (which is also referred to by those skilled in the art as neoprene). More particularly, in this embodiment the resilient deformable material is formed from a combination of: polychloroprene; a cure system and crosslinking agent such as zinc oxide and/or Ethylene thiourea (which is also known by those skilled in the art as ETU) and/or Tetramethylthiuram disulfid (which is also known by those skilled in the art as TMTD); a processing aid such as stearic acid and/or Struktol WB212 (which is used as an emulsion plasticizer dispersing and processing additive); a flame retardant such as antimony trioxide and/or chlorinated polyethylene and/or alumina trihydrate and/or zinc borate; an acid acceptor such as magnesium oxide; an antioxidant and antiozonant such as N-(1,3-Dimethylbutyl)-N′-phenyl-p-phenylenediamine (which is also known by those skilled in the art as 6PPD); and semi re-enforcing carbon black such as N330.
- In another embodiment the resilient deformable material is, or includes, nitrile, which is an organic compound that has a functional group.
- It will be appreciated that the material must be soft enough to deform in response to compressive forces; however hard enough to resist collapsing due to the vacuum created by the pump. The resilient deformable material preferably has a Shore A hardness of between 45 and 70 and the embodiment has a Shore A hardness of 55. Additionally, it is preferable for the material to be UV resistant, petrochemical resistant, heat resistant, fire retardant and to have antistatic properties. With regard to petrochemical resistance, the natural rubber material has fairly poor properties. However, the polychloroprene-based material has good to excellent petrochemical resistance. Additionally, the material may be operated in ambient temperatures ranging from −66° C. to +100° C.
- The natural rubber-based material has a tensile strength of approximately 19 Mpa and can be extended by up to 450% before breakage. The polychloroprene-based material has a tensile strength of approximately 16.9 Mpa and can be extended by up to 375% before breaking.
- The embodiment of the
strainer 1 is formed using an injection moulding process using an ENGEL 150 Tonne Clamp injection moulding machine, which has two cavities. The cavities hold dies that are shaped in the negative form of thestrainer 1 and each die includes a central post that forms the hollowinternal chamber 4 of thestrainer 1. Prior to injection of the material, ametal ring 7 is placed into each of the cavities so as to rest on the central post and the metal rings are retained in position by clipping onto studs. If using the natural rubber-based material, then it is heated to 170° C. prior to injection. Alternatively, if the polychloroprene-based material is being used, then it is heated to a pre-injection temperature of 175° C. The heated material is then injected into each of the cavities to make two of thestrainers 1. If using the natural rubber-based material, then 0.976 litres of material per unit is injected into each cavity. Alternatively, if the polychloroprene-based material is being used, then 0.965 litres of material per unit is injected into each cavity. - If desired, it is also possible to add colouring agents to the material so that the
strainer 1 may be made in a selected colour. - The
strainer 1 is of a unitary construction, which allows for quicker connection of thestrainer 1 onto the hose as compared to the prior art strainers of which the applicant is aware. More particularly, the prior art strainer are formed in two parts which must be screwed together when being installed in situ. The embodiment dispenses with the requirement for the installer to screw two separate parts together, which helps minimise the labour costs associated with installing and replacing the strainers. - The combined cross sectional area of the plurality of
holes 3 is preferably between 2 and 14 times the cross sectional area of theoutlet 5. Such a ratio is desirable to provide thestrainer 1 with a suitable resistance against blockage. The first embodiment has a total of 240 holes, which are arranged in 10 rows, each having 24 holes. Each of theholes 3 is 5 mm in diameter and therefore has a cross sectional area of 19.635 mm2. Hence, the total cross sectional area of the plurality ofholes 3 is 4712 mm2. At its narrowest (i.e. at a cross section taken in the middle of the groove 6), the outlet is 38 mm in diameter, which gives the outlet a cross sectional area of 1134 mm2. Hence, in the first embodiment the total cross sectional areas of the plurality of holes is 4.15 times the cross sectional area of theoutlet 5. - The light weight of the embodiment is another advantage as compared to typical prior art strainers. The embodiment of the
strainer 1 weighs less than 1 kg. More specifically, the weight of the embodiment is approx. 370 grams; whereas the prior art metal strainers typically weigh about 2.5 kg - The
body 2 is in the form of a cylindrical shaft defining adistal end 10 and aproximal end 11. A taperedhead 12 is disposed at thedistal end 10. Theoutlet 5 is at theproximal end 11. The taperedhead 12 improves the resistance ofstrainer 1 against the vacuum created by the pump as compared to the resistance that would be provided by a squared off head. That is, the taperedhead 12 provides support to maintain thedistal end 10 of thebody 5 in a cylindrical configuration despite the vacuum created by the pump. This support also helps the strainer to return to its shape quicker after thebody 5 has been deformed by a compressive force. Another advantage associated with the tapered head is that it lessens the risk of thestrainer 1 being folded in on itself by the vacuum created by the pump. Preferably the tapered head defines an included angle of between 40° and 70° and in the embodiment this angle is 56°. - As can be seen in the figures, the embodiment does not have any sharp edges. This, in addition to the deformability of the material from which the embodiment is predominantly made, helps improve safety for the personnel and reduce the risk of damage to the equipment in the work place in which the
strainer 1 is being used. - The method of using the
strainer 1 when pumping a liquid typically involves attaching a proximal end of a hose to a pump, with the distal end of the hose defining an inlet. Theoutlet 5 of thestrainer 1 is attached to the inlet of the hose and then the strainer is immersed within the liquid that is to be pumped. The pump is then operated so as to suck the liquid into the plurality ofholes 3, through thehollow chamber 4, out theoutlet 5 and into the hose. Periodically the flow direction of the pump is reversed so as to pump an amount of liquid, which is typically between 2 to 10 litres, out of theholes 3 and thereby dislodge any contaminants that may be clogging theholes 3. Alternatively, or additionally, the operator may periodically detach thestrainer 1 and impact it against a solid object so as to dislodge any contaminants that may be clogging theholes 3. Advantageously, the impacting of thestrainer 1 against a solid object is unlikely to damage either thestrainer 1, or the object, due to the deformability of the material from which thestrainer 1 is formed. - Each of the
holes 3 has a perimeter of 15.7 mm Preferably each of these perimeters is extensible by at least 20%. As mentioned above, this degree of extensibility is easily achieved by the material from which the embodiment is made, which has been tested to withstand extension by up to 450% in the case of the natural rubber-based material and up to 375% in the case of the polychloroprene-based material. The deformability and extensibility of theholes 3 is advantageous because it facilitates the methods outlined in the preceding paragraph for unclogging of theholes 3 if they get clogged with contaminants such as stones, etc. That is, the deformability and extensibility of the material allows theholes 3 to expand and re-shaped themselves as required to help eject the contaminants in response to either a reversal of the direction of flow of the pump or in response to impacting of thestrainer 1 against a solid object. In comparison, the stiffness of the holes in the prior art strainers can render them substantially more difficult to unclog. - A second embodiment of the
strainer 13 is shown inFIGS. 4 to 9 . Portions of the second embodiment that are similar to those described above in relation to the first embodiment have been labelled with the same reference numerals as used inFIGS. 1 to 3 . - The second embodiment differs in that it is longer than that of the first embodiment. In the second embodiment, the length of the
strainer 13 is 370 mm from theproximal end 11 to the distal end 10 (compared to 325 mm in the first embodiment). It will, of course, be appreciated that other embodiments may have differing dimensions. - Another difference between the first and second embodiments is that each of the
holes 3 of the second embodiment are 8 mm in diameter (compared to 5 mm in the first embodiment). The second embodiment has a total of 230 holes. Hence, the total cross sectional area of the plurality ofholes 3 in the second embodiment is 11,561 mm2, which is substantially greater than the 4,712 mm2 of the first embodiment. This allows the second embodiment to have a flow rate of up to 850 litres per minute. The dimensions of theoutlet 5 of the second embodiment are identical to those of the first embodiment. That is, at its narrowest, theoutlet 5 is 38 mm in diameter, which gives the outlet a cross sectional area of 1134 mm2. Hence, in the second embodiment the total cross sectional area of the plurality of holes is 10.2 times the cross sectional area of theoutlet 5. Hence, as compared to the first embodiment, the second embodiment is less likely to become clogged to such an extent that the total flow through thestrainer 13 is appreciably reduced. - The other main difference between the first and second embodiments is that the second embodiment has ten
projections 14 spaced equally around thebody 2. Theprojections 14 are respectively positioned between each of the rows ofholes 3. Each of theprojections 14 is in the form of a rib that extends radially away from the centre of thecylindrical body 2. This maintains a clearance gap between thelowermost holes 3 and a surface upon which thestrainer 13 is resting. In use, thestrainer 13 typically rests upon the bottom of a body of water with at least two of theribs 13 making contact with the bottom. Hence, those two ribs hold thelowermost holes 3 up from the bottom of the body of water. This helps to avoid the restriction to the flow through thelowermost holes 3 that would otherwise occur if thelowermost holes 3 were allowed to rest directly against the bottom of the body of water. - Another advantage associated with the
ribs 14 is their contribution to increasing the structural integrity of thestrainer 13 and in particular theribs 14 provide thestrainer 13 with further resistance against being sucked inside-out by the pumping vacuum. Additionally, the presence of theribs 14 helps to keep any larger objects that may be floating within the body of water away from the inlet holes 3. That is, the presence of theribs 14 ensures that only objects that are smaller than the gap between twoadjacent ribs 14 can get close to theholes 3, as shown for example inFIG. 10 . - While a number of embodiments have been described, it will be appreciated by persons skilled in the art that numerous variations and/or modifications may be made to the invention without departing from the spirit or scope of the invention as broadly described. The present embodiments are, therefore, to be considered in all respects as illustrative and not restrictive.
Claims (20)
1. A strainer for attachment to an inlet of a hose, the strainer including:
a body defining a plurality of inlet holes, each of the inlet holes being in fluid communication with a hollow internal chamber; and
an outlet being in fluid communication with the hollow internal chamber, the outlet being to attach to the inlet of the hose;
wherein the body is formed from a resilient deformable material configured to bring opposed sides of the internal chamber into contact with each other in response to application of a compressive force prior to the body resiliently returning substantially to its pre-deformation shape when the compressive force is no longer applied; and
wherein each of the holes defines a perimeter and wherein each of the holes is extensible so as to extend the perimeter by at least 20%.
2. A strainer according to claim 1 , wherein the resilient deformable material is, or includes, any one of: an elastomeric polymer, a rubber, synthetic rubber, rubber-like material, polychloroprene or nitrile.
3. A strainer according to claim 1 , wherein the resilient deformable material has a Young's modulus of less than a Young's modulus of a metal.
4. A strainer according to claim 1 , wherein the resilient deformable material has a Young's modulus of less than a Young's modulus of a hard plastics material.
5. A strainer according to claim 1 , wherein a coupling component is disposed adjacent the outlet and wherein the coupling component is a metal ring.
6. A strainer according to claim 5 , wherein the metal ring is embedded within the material.
7. A strainer according to claim 1 , wherein the strainer is formed by injection moulding.
8. A strainer according to claim 1 , wherein the strainer is of a unitary construction.
9. A strainer according to claim 1 , wherein the material is formed from a combination of: standard Malaysian rubber; an activator; an accelerator; a crosslinking agent, a processing aid; process oil; a wax; an antioxidant and antiozonant; and semi re-enforcing carbon black.
10. A strainer according to claim 9 , wherein:
the Standard Malaysian Rubber is SMR10;
the activator is zinc oxide and/or stearic acid;
the accelerator is N-cyclohexyl-2-benzothiazole sulphonamide;
the crosslinking agent is sulphur;
the processing aid is a viscosity reducer;
the process oil is a paraffinic oil;
the wax is paraffinic wax;
the antioxidant and antiozonant is N-(1,3-Dimethylbutyl)-N′-phenyl-p-phenylenediamine and/or N-Isopropyl-N′-phenyl-p-phenylenediamine; and
the semi re-enforcing carbon black is N774.
11. A strainer according to claim 1 , wherein the material is formed from a combination of:
polychloroprene; a cure system and crosslinking agent; a processing aid; a flame retardant; an acid acceptor; an antioxidant and antiozonant; and semi re-enforcing carbon black.
12. A strainer according to claim 11 , wherein:
the cure system and crosslinking agent is zinc oxide and/or Ethylene thiourea and/or Tetramethylthiuram disulfid;
the processing aid is stearic acid and/or an emulsion plasticizer dispersing and processing additive;
the flame retardant is antimony trioxide and/or chlorinated polyethylene and/or alumina trihydrate and/or zinc borate;
the acid acceptor is magnesium oxide;
the antioxidant and antiozonant is N-(1,3-Dimethylbutyl)-N′-phenyl-p-phenylenediamine; and
the semi re-enforcing carbon black is N330.
13. A strainer according to claim 1 , wherein the combined cross sectional area of the plurality of holes is between 2 and 6 times the cross sectional area of the outlet.
14. A strainer according to claim 1 , wherein the combined cross sectional area of the plurality of holes is between 6 and 14 times the cross sectional area of the outlet.
15. A strainer according to claim 1 , wherein the strainer has a weight of less than 1 kg.
16. A strainer according to claim 1 , wherein the body is a cylindrical shaft defining a distal end and a proximal end and wherein a tapered head is disposed at the distal end and wherein the outlet is at the proximal end.
17. A strainer according to claim 16 , wherein the tapered head defines an included angle of between 40° and 70°.
18. A strainer according to claim 1 , wherein the body is deformable upon the application of the compressive force, configured to crush the hollow internal chamber substantially flat prior to the body resiliently returning substantially to its pre-deformation shape when the compressive force is no longer applied.
19. A method of pumping a liquid including:
providing a pump attached to a hose, the hose having a distal end defining an inlet;
providing a strainer including: a body defining a plurality of inlet holes, each of the inlet holes being in fluid communication with a hollow internal chamber; and an outlet being in fluid communication with the hollow internal chamber, the outlet being for attachment to the inlet of the hose; wherein the body is formed from a resilient deformable material to bring opposed sides of the internal chamber into contact with each other in response to the application of a compressive force prior to the body resiliently returning substantially to its pre-deformation shape when the force is no longer applied and wherein each of the holes defines a perimeter and wherein each of the holes is extensible so as to extend the perimeter by at least 20%;
attaching the outlet of the strainer to the inlet of the hose;
operating the pump to suck the liquid into the plurality of holes, through the hollow chamber, out the outlet, and into the hose; and
periodically detaching the strainer and impacting the strainer against a solid object to dislodge contaminants clogging the holes.
20. A method according to claim 19 , including periodically reversing the flow direction of the pump such that liquid is pumped out of the holes to dislodge contaminants clogging the holes.
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Citations (11)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US3163229A (en) * | 1962-06-25 | 1964-12-29 | Clifford A Salisbury | Plastic screen for water well foot valves |
US3323536A (en) * | 1964-06-11 | 1967-06-06 | Jack E O Connor | Siphon tube trash guard |
US5063959A (en) * | 1990-07-17 | 1991-11-12 | Peterson David T | Method and apparatus for free-standing water removal from roof and siphon head therefore |
EP2056011A2 (en) * | 2007-10-30 | 2009-05-06 | Aquatechnik S.p.A. | Threaded pipe connector of plastic material with reinforcing metal ring |
US20100036038A1 (en) * | 2008-08-08 | 2010-02-11 | Michael Brendan Rodgers | Elastomeric Compositions Having Improved Properties |
US20100297452A1 (en) * | 2008-01-30 | 2010-11-25 | Daiso Co., Ltd. | Vulcanized rubber laminate |
US8128719B1 (en) * | 2009-08-21 | 2012-03-06 | Cummins Filtration Ip Inc. | Filter element with percussion band |
US20120277365A1 (en) * | 2011-04-29 | 2012-11-01 | American Biltrite Ltd. | Surface covering materials and products |
US20120329920A1 (en) * | 2010-09-28 | 2012-12-27 | Toray Industries, Inc. | Thermoplastic resin composition and molded item formed from same |
EP2662402A1 (en) * | 2012-05-11 | 2013-11-13 | Continental Reifen Deutschland GmbH | Rubber compound |
US20140031468A1 (en) * | 2011-07-11 | 2014-01-30 | T.G.L. S.P. Industries Ltd. | Nanoclay hybrids and elastomeric composites containing same |
Family Cites Families (13)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
GB388247A (en) | 1932-04-20 | 1933-02-23 | Henry Thomas Durant | Improvements in and relating to elements for use in filters and the like |
US2173256A (en) * | 1938-10-01 | 1939-09-19 | Us Rubber Co | Method and apparatus for filtering |
US3421631A (en) * | 1965-10-22 | 1969-01-14 | Charles K Hirsch | Strainer gasket for sanitary piping systems |
US3817390A (en) * | 1972-08-18 | 1974-06-18 | A Maruniak | Non-metallic, one-piece filter strainer head |
US4647374A (en) * | 1985-06-11 | 1987-03-03 | Ziaylek Michael P | Floating intake head for water hoses |
US4973405A (en) | 1989-06-01 | 1990-11-27 | Kozey Gregory P | Floating suction head assembly |
JP2536541Y2 (en) | 1991-12-27 | 1997-05-21 | 株式会社ニフコ | Filter for in-tank pump of automobile fuel tank |
SE470377B (en) * | 1993-02-11 | 1994-02-07 | Gambro Dialysatoren | Drip and / or expansion chamber with built-in filter and method for making one |
US6006829A (en) * | 1996-06-12 | 1999-12-28 | Oiltools International B.V. | Filter for subterranean use |
US5803179A (en) * | 1996-12-31 | 1998-09-08 | Halliburton Energy Services, Inc. | Screened well drainage pipe structure with sealed, variable length labyrinth inlet flow control apparatus |
US6468427B1 (en) * | 1998-09-29 | 2002-10-22 | Gambro, Inc. | Fluid filter for use in extracorporeal blood processing |
JP2001120920A (en) * | 1999-10-21 | 2001-05-08 | Gp Daikyo Corp | Oil strainer |
US8834713B1 (en) | 2011-04-07 | 2014-09-16 | Stanley L. Merrett | Intake strainer for a hose |
-
2016
- 2016-03-07 MA MA041824A patent/MA41824A/en unknown
- 2016-03-08 AU AU2016236826A patent/AU2016236826B2/en active Active
- 2016-03-08 BR BR112017020241A patent/BR112017020241A2/en not_active Application Discontinuation
- 2016-03-08 RU RU2017134432A patent/RU2017134432A/en not_active Application Discontinuation
- 2016-03-08 WO PCT/AU2016/050160 patent/WO2016149741A1/en active Application Filing
- 2016-03-08 CA CA2979575A patent/CA2979575C/en active Active
- 2016-03-08 CN CN201680026190.1A patent/CN107530603A/en active Pending
- 2016-03-08 US US15/561,020 patent/US11202977B2/en active Active
- 2016-03-08 PE PE2017001587A patent/PE20171484A1/en unknown
- 2016-03-08 NZ NZ735731A patent/NZ735731A/en unknown
- 2016-03-08 EP EP16767518.0A patent/EP3274067B1/en active Active
- 2016-09-02 MX MX2017012271A patent/MX2017012271A/en unknown
-
2017
- 2017-09-21 CL CL2017002369A patent/CL2017002369A1/en unknown
- 2017-10-18 ZA ZA2017/07055A patent/ZA201707055B/en unknown
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2021
- 2021-10-27 US US17/512,532 patent/US20220047972A1/en active Pending
-
2022
- 2022-01-31 AU AU2022200596A patent/AU2022200596A1/en not_active Abandoned
-
2024
- 2024-02-09 AU AU2024200840A patent/AU2024200840A1/en active Pending
Patent Citations (12)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US3163229A (en) * | 1962-06-25 | 1964-12-29 | Clifford A Salisbury | Plastic screen for water well foot valves |
US3323536A (en) * | 1964-06-11 | 1967-06-06 | Jack E O Connor | Siphon tube trash guard |
US5063959A (en) * | 1990-07-17 | 1991-11-12 | Peterson David T | Method and apparatus for free-standing water removal from roof and siphon head therefore |
EP2056011A2 (en) * | 2007-10-30 | 2009-05-06 | Aquatechnik S.p.A. | Threaded pipe connector of plastic material with reinforcing metal ring |
US20100297452A1 (en) * | 2008-01-30 | 2010-11-25 | Daiso Co., Ltd. | Vulcanized rubber laminate |
US20100036038A1 (en) * | 2008-08-08 | 2010-02-11 | Michael Brendan Rodgers | Elastomeric Compositions Having Improved Properties |
US8128719B1 (en) * | 2009-08-21 | 2012-03-06 | Cummins Filtration Ip Inc. | Filter element with percussion band |
US20120329920A1 (en) * | 2010-09-28 | 2012-12-27 | Toray Industries, Inc. | Thermoplastic resin composition and molded item formed from same |
US20120277365A1 (en) * | 2011-04-29 | 2012-11-01 | American Biltrite Ltd. | Surface covering materials and products |
US20140031468A1 (en) * | 2011-07-11 | 2014-01-30 | T.G.L. S.P. Industries Ltd. | Nanoclay hybrids and elastomeric composites containing same |
EP2662402A1 (en) * | 2012-05-11 | 2013-11-13 | Continental Reifen Deutschland GmbH | Rubber compound |
US9328227B2 (en) * | 2012-05-11 | 2016-05-03 | Continental Reifen Deutschland Gmbh | Rubber mixture |
Also Published As
Publication number | Publication date |
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US11202977B2 (en) | 2021-12-21 |
AU2016236826A1 (en) | 2017-10-05 |
PE20171484A1 (en) | 2017-10-17 |
US20180050287A1 (en) | 2018-02-22 |
EP3274067A1 (en) | 2018-01-31 |
CA2979575A1 (en) | 2016-09-29 |
EP3274067A4 (en) | 2018-11-07 |
AU2024200840A1 (en) | 2024-02-29 |
RU2017134432A (en) | 2019-04-25 |
BR112017020241A2 (en) | 2018-06-05 |
CA2979575C (en) | 2019-07-23 |
AU2016236826B2 (en) | 2021-12-16 |
EP3274067B1 (en) | 2021-12-08 |
MX2017012271A (en) | 2018-02-09 |
WO2016149741A1 (en) | 2016-09-29 |
AU2022200596A1 (en) | 2022-02-24 |
ZA201707055B (en) | 2019-12-18 |
CN107530603A (en) | 2018-01-02 |
NZ735731A (en) | 2021-12-24 |
CL2017002369A1 (en) | 2018-05-11 |
MA41824A (en) | 2018-01-30 |
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