Source: http://www.google.com/patents/US6582205?dq=7,403,220
Timestamp: 2014-09-23 18:30:10
Document Index: 677378592

Matched Legal Cases: ['art 832', 'art 836', 'art 836', 'art 836', 'art 836', 'art 836']

Patent US6582205 - Fluid motivated grease/water pumping and separating system - Google PatentsSearch Images Maps Play YouTube News Gmail Drive More »Sign in<nobr>Advanced Patent Search</nobr>PatentsA grease/water pumping and separating system is provided with a pump mechanism that utilizes a motivating fluid to pump a grease/water mixture. The mixture is sucked into and discharged out of a pumping cavity. A movable biasing boundary, such as a piston, separates the motivating fluid from the grease/water...http://www.google.com/patents/US6582205?utm_source=gb-gplus-sharePatent US6582205 - Fluid motivated grease/water pumping and separating systemAdvanced Patent SearchPublication numberUS6582205 B2Publication typeGrantApplication numberUS 10/242,386Publication dateJun 24, 2003Filing dateSep 12, 2002Priority dateMay 9, 2000Fee statusPaidAlso published asUS6478552, US20030039561, WO2001086147A1Publication number10242386, 242386, US 6582205 B2, US 6582205B2, US-B2-6582205, US6582205 B2, US6582205B2InventorsWilliam C. Batten, Bruce W. KylesOriginal AssigneeThermaco, Inc.Export CitationBiBTeX, EndNote, RefManPatent Citations (32), Non-Patent Citations (10), Referenced by (7), Classifications (21), Legal Events (2) External Links: USPTO, USPTO Assignment, EspacenetFluid motivated grease/water pumping and separating systemUS 6582205 B2Abstract A grease/water pumping and separating system is provided with a pump mechanism that utilizes a motivating fluid to pump a grease/water mixture. The mixture is sucked into and discharged out of a pumping cavity. A movable biasing boundary, such as a piston, separates the motivating fluid from the grease/water mixture. The pump mechanism pumps the grease/water mixture to a separator unit which separates the grease and water components and directs the grease to a retaining tank and the gray water component of the grease/water mixture to an appropriate outlet.
We claim: 1. A system for use in the food preparation or waste water management industry to handle grease/water mixtures, the system comprising:
(a) a source of a grease/water mixture; (b) a separator unit for separating the grease/water mixture into a grease and a gray water, the separator unit comprising a vessel including an inlet, an outlet, an access port, and a section within the vessel for inducing the grease of the grease/water mixture to the access port of the separator unit while diverting the gray water of grease/water mixture to the outlet; (c) a retainer for storing the grease part; (d) an inlet line for transmitting the grease/water mixture from the source to the separator; (e) an outlet line for directing the gray water from the separator unit to a drain or a sewer line; (f) an access line for directing the grease part from the separator unit to the retainer; and (g) a pump for conveying the grease through the access line by supplying and expelling a motivating-fluid, the pump comprising: (i) a body having a cavity, a movable biasing boundary dividing the cavity to define a grease-cell and a motivating-fluid cell, each cell volume variable by the movement of the movable biasing boundary within the cavity, a grease-port in the body for fluid communication with the grease-cell, and a motivating-fluid port in the body for fluid communication with the motivating-fluid-cell; (ii) a grease-circuit including: at least one grease-valve in fluid communication with the grease-port in the body and the access line in fluid communication with the separator and the retainer; and (iii) a motivating-fluid circuit including: at least one motivating-fluid-valve in fluid communication with the motivating-fluid port in the body and a motivating-fluid source. 2. A system according to claim 1, wherein the grease/water mixture source comprises one or more of a sink, a dishwasher, a cooker, a pasteurize, a blancher, an oven, a dryer, and a grille.
3. A system according to claim 2, further comprising at least one additional pump for conveying the grease/water mixture by supplying and expelling a motivating-fluid, the at least one additional pump comprising:
(i) a second body having a second cavity, a second movable biasing boundary dividing the cavity to define a grease/water-cell and a second motivating-fluid cell, each cell volume variable by the movement of the movable biasing boundary within the cavity, a grease/water-port in the second body for fluid communication with the grease/water-cell, and a motivating-fluid port in the second body for fluid communication with the second motivating-fluid cell; (ii) a grease/water-circuit including: at least one grease/water-valve in fluid communication with the grease/water-port in the second-body and the inlet line in fluid communication with the grease/water source and the separator; and (iii) a second motivating-fluid circuit including: at least one second motivating-fluid valve in fluid communication with the second motivating-fluid port in the second body and a motivating-fluid source. 4. A system according to claim 3, wherein the movable biasing boundary of the pump is in communication with the second movable biasing boundary of the additional pump and thereby the second movable biasing boundary of the additional pump biases the movable biasing boundary of the pump and the movable biasing boundary biases the second movable biasing boundary.
5. A system according to claim 1, wherein the motivating-fluid comprises water.
6. A system according to claim 1, further comprising a controller in communication with the valves of the pump for coordinating an opening and a closing of the valves to effect a conveying.
7. A system according to claim 6, wherein the controller comprises a selection mechanism type of at least one of manual, mechanical, electromechanical, and electronic.
8. A system according to claim 6, wherein the controller comprises a programmable logic controller and the valves comprise solenoid actuated valves.
9. A method of conveying a first fluid which is a grease component to be separated from a water component comprising:
directing an effluent having a first fluid grease component and a water component to a container that has a volume large enough to permit the first fluid to float above the water component; providing a unit having a cavity including a movable biasing boundary disposed therein to define a first cell and a second cell, each having a variable volume; directing a second fluid at a pressure into the second cell to act on the movably biasing boundary to expand the second cell until the pressure of the second fluid is substantially balanced by the movable biasing boundary or the second cell has expanded to diminish the first cell volume to a minimum; contracting the second cell through the movement of the movable biasing boundary to discharge the second fluid from the second cell and thereby expanding the first cell drawing the first fluid from a source into the first cell; and repeating the act of directing the second fluid thereby discharging the first fluid from the first cell, thereby conveying it. 10. A method according to claim 9, wherein the first fluid comprises a grease/water mixture and the second fluid comprises water from a municipal water supply.
11. A method according to claim 10, wherein the preselected pressure comprises about nominal city water pressure.
12. A method according to claim 10, wherein the preselected pressure comprises about 30 to about 60 pounds per square inch.
13. A method according to claim 10, wherein the preselected pressure comprises about 40 to about 50 pounds per square inch.
providing a second unit having a second cavity including a second movably biasing boundary disposed therein to define a third cell and a fourth cell, each cell having a variable volume; coupling the movement of the movably biasing boundary and the second movably biasing boundary: directing of the second fluid at a preselected pressure into the unit past the second opening to act on the movably biasing boundary to expand the second cell until the preselected pressure of the second fluid is substantially balanced by the movably biasing boundary corresponds with a permitting the second-second cell to contract through the movement of the second movably biasing boundary to discharge the second fluid from a second opening of the second unit and a drawing the first fluid from a source into a first opening of the second unit in fluid communication with the second-first cell as the second-first cell expands; permitting of the second cell to contract through the movement of the movably biasing boundary to discharge the second fluid from the second opening and thereby drawing the first fluid from a source into a first opening of the unit as the first cell expands the corresponds with a directing of the second fluid at a preselected pressure into the second unit past a second opening therein to act on the second movably biasing boundary to expand the second-second cell until the preselected pressure of the second fluid is substantially balanced by the second movably biasing boundary; and repeating of the directing of the second fluid to discharge the first fluid from the first cell by the first opening and the directing of the first fluid conveying it while a repeating of the directing of the second fluid to discharge the first fluid from the second-first cell by the first opening of the second unit and directing the first fluid thereby conveys it. 15. A method according to claim 14, wherein the second fluid conveyed by the unit is substantially the same as the second fluid conveyed by the second unit.
16. A method according to claim 14, wherein the second fluid conveyed by the unit is substantially different from the second fluid conveyed by the second unit.
17. A method according to claim 9, wherein a pressure by which the second fluid is conveyed is substantially the same as the preselected pressure.
This application is a continuation of U.S. patent application Ser. No. 09/567,778 filed May 9, 2000, which issued as U.S. Pat. No. 6,478,552 on Nov. 12, 2002.
BACKGROUND OF THE INVENTION This invention pertains to a fluid motivated pump that may be used in locations where either it would be preferable not to use a pump having an electric motor or electricity is unavailable. A fluid motivated pump of the present invention may be used with food preparation equipment, wastewater equipment and a unit that separates a mixture of insoluble or immiscible fluids into its parts. For example, when used with food preparation equipment, a pump may deliver a grease/water mixture to a separator unit, a gray water part from the separator to a sewer line, and a grease part from the separator to a storage vessel.
Also, electrical current leaking into water presents a hazard. For example, a unit used to separate a grease/water mixture into a gray water part and a grease part may include one or more pumps. A first pump may be used to transmit the grease part to a storage vessel. A second pump may be used to deliver the gray water part to a sewer line. To satisfy electrical codes, a ground-fault interrupter must protect the electrical lines to the motor of each pump. Watertight electrical boxes may also be required. The electrical lines should be either Type TW wires encased in metal or plastic conduit or Type UF (underground feeder) cable. These precautions are required to prevent electrical shock. Again, a non-electrical alternative would be desirable.
SUMMARY OF THE INVENTION A pump according to the present invention conveys or pumps a fluid (later called a stock fluid) through a motivating fluid provided at a preselected pressure acting against a movable biasing boundary. A pump according to the present invention includes at least one unit having a cavity in fluid communication with at least one valve and at least one additional valve. The at least one valve regulates the providing and discharging of the motivating fluid while the at least one additional valve regulates the drawing or suctioning and discharging of a stock fluid. The movably biasing boundary splits the cavity into a stock-fluid cell and a motivating-fluid cell. Walls of the cavity and at least a portion of the movable biasing boundary define each cell. A motivating-fluid port is in fluid communication with the at least one valve and the motivating-fluid cell. A stock-fluid port is in fluid communication with the at one additional valve and the stock-fluid cell.
DETAILED DESCRIPTION OF PREFERRED EMBODIMENTS Applicants discuss below several embodiments of a fluid motivated pump and an embodiment including fluid motivated pump. After reading this detailed description of the preferred embodiment, those skilled in the art will appreciate that other embodiments for the present invention exist and may be contemplated.
In a like manner, a line 102 supplies the motivating fluid to the motivating-fluid cells 46, 50 of each unit 36, 34 through motivating-fluid ports 66, 64; branches 94, 92; paths 86, 84 of valves 76, 74; and motivating-fluid lines 72, 70. A line 104 disposes of the motivating fluid from the motivating-fluid cells 46, 50 of each unit 36, 34 through motivating-fluid ports 66, 64; motivating-fluid lines 72, 70; paths 82, 80 of valves 76, 74 and branches 100, 96. A tie 90 coordinates the motion of the valves 76, 74 to direct the motivating fluid from branches 94, 92 through paths 86, 84 to motivating-fluid lines 72, 70 and from motivating-fluid lines 72, 70; through paths 82, 80 to and from branches 100, 96 respectively.
Movement of piston 56 from right to left draws stock fluid into stock-fluid cell 52 of the first unit 36 from line 12 along branch 16 through valve 22, bridge 26, stock-fluid line 32 and stock-fluid port 42, while valve 110 remains closed. Movement of piston 56 from left to right pumps stock fluid from stock-fluid cell 52 of the first unit 36 through stock-fluid port 42, stock-fluid line 32, valve 110 and along branch 114 to line 116 for disposal while valve 22 remains closed. Motivating fluid travels to motivating-fluid cell 46 of the first unit 36 from line 102 along branch 94 through path 86 of valve 76, motivating-fluid line 72 and motivating-fluid port 66 while path 82 of valve 76 remains unavailable. Motivating fluid travels from motivating-fluid cell 46 of the first unit 36 through motivating-fluid port 66, motivating-fluid line 72, path 82 of valve 76 and along branch 100 to line 104 for disposal while path 86 of valve 76 remains unavailable.
State Summary for Cycle Steps of FIGS. 1A and 1B
Another embodiment of the present invention shown in FIG. 1C includes two double acting units working together similar to those of FIGS. 1A and 1B except that the piston and cell sizes of the motivating fluid differs from those of the stock fluid. Like items in FIGS. 1A, 1B and 1C have like numbers. A prime symbol �′� is used to designate a variation of an item. FIG. 1C depicts a pump 10′ that includes a first unit 36′ and a second unit 34′. Each unit 36, 34 includes a stock-fluid port 42, 40; a piston 56′, 54′, stock-fluid cell 52′, 44′ and a motivating-fluid cell 46′, 50′; and a motivating-fluid port 66, 64. The motivating-fluid cell 46′, 50′ is larger than the stock-fluid cell 52′, 44′. Piston 56′, 54′ have been modified to adapt to the cell differences. Link 51′ connects piston 54′ within the motivating-fluid cell to a piston 54″ within the stock-fluid cell. An extension 53′ of piston 56′ within stock-fluid cell connects piston 56′ to a piston 56″. A link 108 coordinates the motion of the pistons 56′, 56″, 54′ and 54″ within the respective cells of each unit 36′, 34′. Each piston 56′, 56″, 54′ and 54″ may include a seal 62″, 62′, 60′, and 60″ at a perimeter of each piston contacting the cell wall of its respective cell within unit 36′, 34′ to prevent the contamination of the motivating fluid by the stock fluid and vice versa. An advantage of pump 10′ includes the ability to pump the stock-fluid to a higher pressure proportional to the ratio of the areas of the pistons in the motivating-fluid cell and the stock-fluid cell. Another advantage of pump 10′ that is shared with pump 10 and pump having a similar design includes the pump's ability to suction and pump stock fluid at a reasonable operating pressure while not being negatively effected by the operating pressure of the motivating fluid.
Movement of piston 256 from right to left draws stock fluid into stock-fluid cell 252 of unit 236 from line 212 through valve 222, bridge 226, stock-fluid line 232 and stock-fluid port 242, while valve 310 remains closed. Movement of piston 256 from left to right pumps stock fluid from stock-fluid cell 252 of unit 236 through stock-fluid port 242, stock-fluid line 232 and valve 310 to line 316 for disposal while valve 222 remains closed. Motivating fluid travels to motivating-fluid cell 246 of the unit 236 from line 302 along branch 294 through path 286 of valve 276, motivating-fluid line 272 and motivating-fluid port 266 while path 282 of valve 276 remains unavailable. Motivating fluid travels from motivating-fluid cell 246 of the unit 236 through motivating-fluid port 266, motivating-fluid line 272, path 282 of valve 276 and along branch 300 to line 304 for disposal while path 286 of valve 276 remains unavailable.
Step 1 of the cycle includes the suctioning of stock fluid into unit 236 from a stock-fluid source through line 212. Referring to the unit 236 in FIG. 2A, the circuits from motivating-fluid cell 246 to discharge motivating fluid line 304 is open. Also, the circuit from line 212 to draw stock fluid into stock-fluid cell 252 are open. As biasing element 244 contracts, it acts through link 308 to move piston 256 of unit 236. As piston 256 moves, the expansion of stock-fluid cell 252 creates suction in the open circuit to line 212 to draw stock fluid into stock-fluid cell 252. Motivating-fluid cell 246 contracts as piston 256 moves from right to left. Step I ends when stock-fluid cell 252 expands to its greatest volumes; motivating-fluid cell 246 contracts to its smallest volume and biasing element 244 contracts to its shortest length. Then, path 282 makes way for path 286 in valve 276; valve 222 closes; and valve 310 opens. Valve 272 may have its paths make way by a fie 290 as shown in FIG. 2A. Alternatively, valves 276 may be arranged in a manner similar to valves 222 and 310 and visa versa. Once the path and valve states are changed, step 2 of the cycle begins.
Alternative embodiments to those of FIGS. 2A and 2B include, for example, placing the biasing element within the cavity of the unit as shown in FIG. 2C and replacing the piston and biasing element with a polymeric membrane or bladder as shown in FIG. 2D. Like items in FIGS. 2A, 2B, 2C and 2D have like numbers. A prime symbol �′� is used to designate a variation of an item in FIG. 2C while a double a prime symbol �″� is used to designate a variation of an item in FIG. 2D.
Yet another embodiment of the present invention includes a plurality of double acting units working together. FIG. 3A depicts a pump 410 including eight units 401, 402, 403, 404, 405, 405, 407 and 408 arranged in a circle. FIG. 3B depicts a pump 610 including eight units 601, 602, 603, 604, 605, 605, 607 and 608 arranged in two lines. To minimize clutter, only selected items have been numbered in each of FIGS. 3A and 3B. Is will apparent to those skilled in the art that items having similar appearance perform similar functions.
The valves of the motivating-fluid circuit may be any types that achieve the goal of a pump according to the present invention. A particularly useful valve type is a solenoid valve. A solenoid valve may be placed in the motivating-fluid circuit to direct the flow of motivating fluid into the motivating-fluid cell to drive a piston while pumping the stock fluid. Also, a solenoid valve may be actuated in the motivating-fluid circuit to bleed the motivating fluid from the motivating fluid cell while suctioning the stock-fluid into the stock-fluid cell. Solenoid valves appropriate for use in a pump of the preset invention include those commercially available from industrial suppliers such as W. W. Grainger, Inc.
A further aspect of the present invention provides an application of the pump of any of the previous embodiments. FIG. 4 shows a system 810 including a first pump 822 and a second pump 842 according the present invention. The first pump 822 is used to transmit a grease/water mixture 820 from an appliance to a collection line 826 of a separator unit 830. The second pump 842 is used to transmit a grease part 832 separated in the separator unit 830 to a holding tank 844. Both pumps 822, 842 are useful in commercial food preparation operations. As will become apparent, the water used as the motivating fluid is preferably hot water for pump 842.
Referring to appliance 814 that includes pump 822, it may be any of the type used in commercial food preparation operations. Such appliances may include any equipment or process that produces or results in a grease/water mixture. Examples of equipment that perform processes that might result in grease/water mixtures include a sink, a dishwasher, a cooker, pasteurizer, a blancher, an oven, a dryer, a grille etc. The appliance may include a tank 816 containing a grease/water mixture 820 that is a stock fluid to be pumped. A line 812 of the pump 822 communicates with the grease/water mixture 820. A line 902 provides the pump 822 potable water as the motivating fluid at about nominal water pressure (e.g., ranging from about 30 to about 60 pounds per square inch (psi) and more typically from about 40 to about 50 psi). Also, the pump 822 includes a grease/water discharge line 916 and a potable water discharge line 904, both shown to communicate with collection 826 through line 824. To remove grease/water mixture from tank 816 to separator 836, pump 822 is run, and both the grease/water mixture 820 and the potable water are transmitted to separator 830.
Referring to separator 830 that includes pump 842, it may be any of the type used in commercial food preparation operations. Such separators may include any equipment or process that separates a grease/water mixture into a grease part and a gray water part. A particularly popular and effective separator has been the Big Dipper� separator sold by Thermaco, Inc. of Asheboro, N.C., USA. One model of the Big Dipper� separator uses a rotating oleophilic wheel to pull grease from the top of a body of a grease/water mixture to be scraped off by a blade. Another separator is that described in U.S. patent application Ser. No. 09/439,900, filed Nov. 12, 1999, entitled �Readily Serviceable Separator Unit with a Focusing Plate.� This separator 830 includes a focusing plate 832 that separates a grease/water mixture 834 into a grease part 836 and a gray water part that than passes through the separator 830 in to a sewer line 840. The grease part 836 is transmitted from the surface of the grease/water mixture 834 to a holding tank 844 for later appropriate disposal. A line 912 of the pump 842 communicates with the grease part 836. A line 902 communicates with the pump 842 to provide potable water as the motivating fluid at about nominal city water pressure (e.g., ranging from about 40 to about 50 psi). Preferably, the potable water is hot water that can be directed into the separator 830 to add heat to the mixture 834 so the grease stays liquid. Also, the pump 842 includes a grease part discharge line 917 and a potable water discharge line 905. When pump 842 is run, the grease part 836 is transmitted to the holding tank 844 and the potable water is transmitted to separator 830 just below the grease part 836.
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SolomonMobile heat pumpUS20110100641 *Nov 3, 2009May 5, 2011Stephane BriquetDownhole piston pump and method of operation* Cited by examinerClassifications U.S. Classification417/393, 210/800, 210/513, 417/53, 417/403, 417/401International ClassificationF04B43/113, F04B9/111, F04B9/115, F04B9/107, F04B9/135Cooperative ClassificationF04B9/115, F04B9/135, F04B9/1115, F04B9/107, F04B43/113European ClassificationF04B9/135, F04B43/113, F04B9/107, F04B9/115, F04B9/111ALegal EventsDateCodeEventDescriptionJul 27, 2010FPAYFee paymentYear of fee payment: 8Oct 18, 2006FPAYFee paymentYear of fee payment: 4RotateOriginal ImageGoogle Home - Sitemap - USPTO Bulk Downloads - Privacy Policy - Terms of Service - About Google Patents - Send FeedbackData provided by IFI CLAIMS Patent Services©2012 Google