Source: http://www.google.com/patents/US6599077
Timestamp: 2016-10-22 16:45:16
Document Index: 337779798

Matched Legal Cases: ['art 6', 'art 6', 'art 6', 'art 6', 'art 6', 'art 6', 'art 6', 'art 6', 'art 6', 'art 6', 'art 6', 'art 6', 'art 6', 'art 6']

Patent US6599077 - Material delivery system for clean room-like environments - Google PatentsSearch Images Maps Play YouTube News Gmail Drive More »Sign inPatentsA material delivery system is disclosed which is particularly useful for filtered environments, such as clean rooms, minienvironments, or the like. In one embodiment, the material delivery system is disposed below a work area in a clean room-like environment to store parts to be used at the work area....http://www.google.com/patents/US6599077?utm_source=gb-gplus-sharePatent US6599077 - Material delivery system for clean room-like environmentsAdvanced Patent SearchTry the new Google Patents, with machine-classified Google Scholar results, and Japanese and South Korean patents.Publication numberUS6599077 B2Publication typeGrantApplication numberUS 10/074,712Publication dateJul 29, 2003Filing dateFeb 12, 2002Priority dateAug 25, 1999Fee statusLapsedAlso published asUS6305500, US6471010, US6648587, US20020007986, US20020074190, WO2001014227A1, WO2001014227A9Publication number074712, 10074712, US 6599077 B2, US 6599077B2, US-B2-6599077, US6599077 B2, US6599077B2InventorsJohn D. McCrandall, Tom McMunigal, Richard E. Rupp, Jr.Original AssigneeMaxtor CorporationExport CitationBiBTeX, EndNote, RefManPatent Citations (29), Referenced by (2), Classifications (7), Legal Events (9) External Links: USPTO, USPTO Assignment, EspacenetMaterial delivery system for clean room-like environments
US 6599077 B2Abstract
What is claimed is: 1. A work station, comprising:
a work zone, wherein said work zone comprises a filtered environment and a work surface that is disposed within said filtered environment, wherein said work surface comprises a work surface opening; a material delivery system disposed within said work zone below said work surface, wherein said material delivery system comprises a material delivery system opening aligned with said work surface opening, as well as a vertically movable platform that is aligned with said material delivery system opening and thereby said work surface opening, wherein access to said material delivery system is limited to through said material delivery system opening. 2. A workstation as claimed in claim 1, further comprising:
a plurality of trays stacked on said platform of said material delivery system, wherein each said tray comprises a plurality of parts. 3. A work station, as claimed in claim 2, wherein:
each said tray is disposable. 4. A work station, as claimed in claim 2, wherein:
said plurality of parts comprise a plurality of disk drive parts. 5. A work station, claimed in claim 1, wherein said material delivery system further comprises:
an enclosure that comprises said material delivery system opening, an interior space, and a bottom that comprises a plurality of perforations and that is disposed opposite said material delivery system opening, wherein said platform is movably disposed within said enclosure. 6. A work station, as claimed in claim 1, further comprising:
a minienvironment that comprises said filtered environment. 7. A work station, as claimed in claim 6, wherein:
said minienvironment comprises a frame, walls defining an at least substantially enclosed space, at least one access to said at least substantially enclosed space from outside said minienvironment, and a filtered gas delivery system fluidly interconnected with said at least substantially enclosed space for directing a gas flow from outside said at least substantially enclosed space to within said at least substantially enclosed space. 8. A work station, as claimed in claim 1, wherein:
said filtered environment is a clean room. 9. A work station, as claimed in claim 1, wherein:
said filtered environment has a cleanliness level of at least a Class 100. 10. A work station, as claimed in claim 1, further comprising:
a portable clean cart that contains said material delivery system and that is parked at said work zone under said work surface. 11. A work station, as claimed in claim 1, wherein:
said material delivery system is fixedly incorporated into said work station. 12. A method for assembling a disk drive, comprising the steps of:
providing a filtered environment for a work surface, wherein said work surface comprises an opening; disposing a material delivery system below said work surface, wherein said disposing step comprising aligning a platform of said material delivery system with said opening in said work surface; disposing a plurality of disk drive parts on said platform of said material delivery system; executing a first raising step comprising raising said platform of said material delivery system to a first position; removing a first plurality of said plurality of disk drive parts from platform of said material delivery system while at said first position; executing a second raising step comprising raising said platform of said material delivery system from said first position to a second position; and removing a second plurality of said plurality of disk drive parts from said platform of said material delivery system while at said second position. 13. A method, as claimed in claim 12, wherein
said disposing a plurality of disk drive parts step comprises stacking a plurality of trays on said platform of said material delivery system. 14. A method, as claimed in claim 13, wherein:
said first plurality are disposed within a first tray and said second plurality are disposed within a second tray, wherein said first tray is disposed on top of said second tray, wherein said method further comprises the step of removing said first tray after said removing a first plurality step, wherein said executing a second raising step is executed after said removing said first tray step. 15. A method, as claimed in claim 14, further comprising the step of:
discarding said first tray after said removing said first tray step. 16. A method, as claimed in claim 12, wherein:
said executing a first and second raising step each comprise positioning said first and second pluralities, respectively, at a desired height relative to said work surface. 17. A method, as claimed in claim 12, further comprising the steps of:
loading said plurality of disk drive parts in a portable clean cart, wherein said portable clean cart comprises said material delivery system; sealing said portable clean cart to maintain cleanliness standards associated with said plurality of parts; and transporting said portable clean cart after said sealing step, wherein said disposing step comprises parking said portable clean cart under said work surface.
This patent application is a continuation of U.S. patent application Ser. No. 09/967,407, filed on Sep. 28, 2001, and entitled “MATERIAL DELIVERY SYSTEM FOR CLEAN ROOM-LIKE ENVIRONMENTS” now U.S. Pat. No. 6,471,010, which is a divisional of U.S. patent application Ser. No. 09/383,002, filed on Aug. 25, 1999, entitled “MATERIAL DELIVERY SYSTEM FOR CLEAN ROOM-LIKE ENVIRONMENTS,” now U.S. Pat. No. 6,305,500, issued Oct. 23, 2001, the entire disclosures of which are incorporated by reference herein.
Smaller-sized openings may be provided in the minienvironment's enclosure to allow an operator to dispose his or her arms therethrough to retrieve parts and/or to execute some type of operation (e.g., assembly) within the minienvironment. Only the operator's hands and possibly a portion of the operator's arms need to meet certain cleanliness requirements with this type of minienvironment. It should be appreciated that these types of minienvironments thereby do not provide for total isolation from the surrounding environment, but instead rely on a higher air pressure within the minienvironment's enclosure to keep particulates and other contaminants which may exist in the surrounding environment from flowing into the minienvironment through the noted fluid interconnections. The above-noted reference to an “enclosure” for a minienvironment would thereby include a shroud, hood, or the like which does not provide for a total enclosure (e.g., a gap may exist along a lower portion of a sidewall of the minienvironment). Some minienvironments may include a glove box or the like to further maintain the cleanliness within the minienvironment and for the above-noted types of purposes. Still other minienvironments have no access for operations personnel during normal operations within the minienvironment, but instead rely on robotic devices within the minienvironment to perform the desired operation(s) therewithin. In both of these later instances, there may be a total isolation of the interior of the minienvironment from the surrounding environment.
Numerous disadvantages exist in relation to known clean carts. One is that these clean carts consume floor space which in some cases may be at a premium. Another is that the operator must manually retrieve parts from the clean cart and provide the same to the subject workstation. Often this involves certain repetitive motions which may subject the operator to injury over time. For instance, an operator positioned on a chair at a minienvironment may have to rotate 90� and bend over to access the parts contained within the clean cart, and thereafter rotate back to the minienvironment with the parts in hand (typically on a tray) to position them into the minienvironment. The alternative would be for the operator to get up and walk over to the clean cart which not only wastes valuable time, but possibly means positioning the clean cart at a location where there may be unanticipated impacts between the clean cart and personnel which would be undesirable in a number of respects.
The present invention generally relates to material delivery systems and, more particularly, to material delivery systems for use in clean room-like environments which include a station. “Stations” for purposes of the present invention include any zone or area where products are stored, assembled, subject to transport, or acted upon by any type of processing apparatus and/or operations personnel. “Clean room-like environments” include clean rooms as well as minienvironments of the type discussed above.
A first aspect of the present invention relates to a material delivery system which may exist as a stand-alone unit (e.g., a portable cart, an enclosure of sorts with wheels, casters, or other transport mechanism) or which may be incorporated into the design of a given station (e.g., by being fixedly interconnected with at least a portion of the station such as a work table or the like). The material delivery system includes at least some type of enclosure which may be defined at least in part by a sidewall assembly. In one embodiment the vertical extent or height of this enclosure is such that it maybe disposed “under” stations of the above-noted type. Positioning the enclosure of the material delivery system of the first aspect of the present invention in this manner reduces the space requirements in the work area at issue by taking advantage of space which is typically wasted in the above-noted types of environments and which is often thought of as being “dirty.” Products (including component parts) used at the station may be stored within the confines of the enclosure. In another embodiment of this first aspect of the present invention, the material delivery system includes an elevator which is disposed at least somewhere within the confines of the enclosure for moving a payload therewithin. Preferably, both of these embodiment are used in combination although such is not required. In the case of the noted combination, a payload may be stored in each of a plurality of trays which are stacked within the confines of the enclosure and raised by the elevator to a suitable height for access by equipment, operations personnel, or both at the station.
In at least certain instances it will be desirable to isolate the product within the upper chamber from the environment in which the enclosure of the material delivery system of the present invention is disposed. In the case where the above-noted perforations are incorporated on a bottom of the enclosure, stated another way preferably there is a way to seal these perforations off from the upper chamber. Consider the case where the material delivery system is a portable cart or the like for providing product to a minienvironment. In this regard, “clean” product likely will be loaded into the upper chamber of the enclosure at a location which is outside of the area in which the minienvironment is located. Attempts will typically be made to maintain the level of cleanliness of these “clean” products during this loading procedure as well. A number of features may be incorporated into the material delivery system of the present invention to attempt to maintain this level of cleanliness during the transport of the material delivery system of the present invention to the minienvironment. One such feature is incorporating a gasket on the above-noted bottom of the enclosure. This gasket may be configured to totally surround the area of the bottom having the above-noted plurality of perforations. An extension then may be interconnected with the platform of the elevator to sealingly engage with this gasket about its entire circumference. Typically, this will be the case only when the elevator is disposed in its lowermost position (e.g., when the enclosure is “full” of product). After the material delivery system is “parked” at the minienvironment, the platform may be raised to provide product in the above-noted manner. This movement of the platform may then disengage the extension from the gasket to allow air flow from the minienvironment to flow into the upper chamber, into the lower chamber, and then out of the enclosure through the now “un-sealed” plurality of perforations.
Preferably the area of the enclosure in which product is stored is at least substantially isolated from the remainder of the material delivery system of the present invention. An additional feature which relates to this issue is how the elevator's platform interconnects with the remainder of the elevator and which is subject to a number of characterizations. Broadly stated, the mechanical interconnection(s) of the platform with the remainder of the elevator is disposed at an elevation which is below that of an uppermost surface of the platform. In one embodiment, at least one and preferably one or more of guide rods, lead screws, or both, are used to advance the platform vertically within the enclosure. The area within the enclosure through which the platform travels may be at least substantially isolated from these guide rods/lead screws. For instance, one or more vertically extending partitions maybe disposed inwardly and spaced from an adjacent portion of the enclosure so as to be disposed between the platform and each guide rod/lead screw. That is, the guide rods/lead screws may be disposed within this space or spaces between a periphery of the platform and the inner surface of the enclosure. Consider an example where the platform is at least substantially rectangular or square. One guide rod, one lead screw, or both may be disposed on one side of the platform, and one guide rod, one lead screw, or both may be disposed on an opposite side of the platform. One partition may be disposed between the platform and guide rod(s) and/or lead screw(s) on one of the noted sides of the platform to provide the desired degree of isolation, and another partition may be disposed between the platform and guide rod(s)/lead screw(s) on the other of the noted platform sides. The structure (e.g., a coupling, bracket, connecting rod, or the like) which connects the platform with a particular guide rod or lead screw may extend through a split seal (e.g., a pliable material with a slit therethrough) formed in the subject partition. In cases where the guide rod(s)/lead screw(s) are vertically disposed, so to will be the corresponding split seal(s).
More than one first latching and camming assembly and more than one second latching and camming assembly may be provided for each cover support surface. For instance and in the case where there are two such cover support surfaces disposed on opposite sides of the body of the cart, two displaced first latching and camming assemblies may be provided on the cover on one side thereof, while two displaced first latching and camming assemblies maybe provided on the opposite side of the cover. Similarly, two second latching and camming assemblies maybe disposed on one side of the body of the cart, and two second latching and camming assemblies may be disposed on the opposite side of the body of the cart. An appropriate linkage may interconnect the second latching and camming assemblies which are located on the same side of the body of the cart. Both of these linkages in turn may be activated by interconnecting these linkages with a common handle which may be pivoted in one direction to seal the cover onto the body, and which may be pivoted in the opposite direction to lift the cover from the body in the above-described manner. The handle may also be used to transport the cart from one locale to another, such as by incorporating wheels on the bottom of the cart.
FIG. 11A is a side view of the material delivery system of FIG. 1 which illustrates in more detail the cover latch/lift assembly.
The material delivery system 2 of FIGS. 1-2 is in the form of a clean cart 6 of sorts having a plurality of wheels 46 to provide the noted portability feature. The cart 6 further generally includes a body 10, a top or cover 50, and a bottom 34 which are appropriately interconnected and collectively define an enclosed space 26, at least part of which may be used for the storage of parts or any other desired payload. Access to this material storage space 26 is provided by having the cover 50 being detachably interconnected with the body 10. Parts or any other payload for that matter may be loaded into the enclosed space 26 and onto a material delivery elevator 100 disposed therein after removal of the cover 50. Once loaded, the cover 50 maybe installed on the body 10 and preferably sealed thereto, for instance to maintain any cleanliness standards associated with parts loaded therein. Thereafter the material delivery system 2 may be readily transported to the desired locale via the rolling action provided by the wheels 46. Parts stored in the material delivery system 2 may then be made available to an operator, relevant equipment (e.g., any device used in the manufacture of disk drives), or both by removing the cover 50 from the body 10. Activation of the material delivery elevator 100 may then be affected to dispose the parts at a desired elevation for access by an operator and/or any appropriate equipment.
Rotation of each of the drive screw rods 176 changes the position of the platform assembly 102 within the cart 6. In this regard, a screw rod pulley 204 is fixed to the lower end of each of the drive screw rods 176 at a location which is disposed below the bottom 34 of the cart 6 as illustrated back in FIGS. 4-5. Each screw rod pulley 204 is rotated by a motor 208. This motor 208 is mounted on the bottom 34 of the cart 6 via a pair of motor mounts 220 and a plurality of fasteners 224 such that its drive shaft 212 extends downwardly through a motor aperture 228 which is recessed in the bottom 34 of the cart 6. Fixed to this drive shaft 212 at a location which is disposed below the bottom 34 is a drive pulley or sprocket 216. Transfer of the rotary motion of the drive shaft 212 of the motor 208 to each of the screw rod pulleys 204 is provided by a drive belt 268 which is in the form of a continuous loop. Other continuous loop drive members could also be utilized. Although a direct interconnection could be utilized, in the illustrated embodiment the drive assembly 136 further includes a tensioning pulley 232 and an idler pulley 252. The tensioning pulley 232 is interconnected with the bottom 34 of the cart 6 by a mounting block 236. The tensioning pulley mounting block 236 is disposed within a recess 248 formed on the lower surface of the bottom 34 of the cart 6 and is interconnected therewith by a plurality of fasteners 244. These fasteners 244 extend through slots 240 formed on the tensioning pulley mounting block 236. At least one of the slots 240 is shaped to allow for at least some modification of the position of the tensioning pulley 232 relative to the bottom 34, to in turn change the tension of the drive belt 268. Similarly, the idler pulley 252 is interconnected with the bottom 34 of the cart 6 by a mounting block 256. The idler pulley mounting block 256 is disposed within a recess 264 formed on the lower surface of the bottom 34 of the cart 6 and is interconnected therewith by a plurality of fasteners 260. These fasteners 260 extend through slots 258 formed on the idler pulley mounting block 256. These slots 258 are not shaped to allow for at least some modification of the position of the idler pulley 252 relative to the bottom 34 in the illustrated embodiment, to in turn change the tension of the drive belt 268, although such could be utilized here as well.
Each first cover latch/lift subassembly 72 is engageable by a second cover latch/lift subassembly 328 of the cover latch/lift assembly 272. Refer now to FIGS. 11A-11D. Generally, the plurality of second cover latch/lift subassemblies 328 (one provided for each first cover latch/lift subassembly 72) is moved between at least two positions to provide the latching and lifting functions. This movement is provided by a pair of latch/lift assembly linkages 300 of the cover latch assembly 272 which are disposed on opposing sides of the cart 6.
When the handle 276 is disposed in the position illustrated in FIG. 11B, each latch 336 of a second latch/lift subassembly 328 is disposed in the slot 78 of its corresponding first latch/lift subassembly 72 to retain the cover 50 on the body 10 of the cart 6. Subsequent movements of the cover latch/lift assembly 272 will principally be directed to FIG. 11B and for purposes of unlatching and then lifting the cover 50, although other drawings may be consulted. When it is desirable to remove the cover 50 to access the upper chamber 28 of the enclosed space 26, the handle 276 is pivoted in the direction of the arrow A. A certain degree of movement of the handle 276 in this direction has no substantial effect on the position of either of the latch/lift assembly linkages 300 due to the slot 306 in each of the first links 304. Engagement of the pins 318 a against an end 307 of the slots 306 will then cause each of the first links 304 to simultaneously pivot relative to the body 10, which in turn simultaneously pivots each of the second links 308 in the direction of the arrow B. Pivotation of the second links 308 in the direction of the arrow B in turn causes the corresponding third links 312 and fourth links 316 of each of the latch/lift assembly linkages 300 to move at least generally axially in the direction of the arrow C. This movement of the third links 312 and fourth links 316 causes the second latch/lift subassemblies 328 interconnected therewith to simultaneously pivot in the direction of the arrow D. Each latch 336 is removed from its corresponding slot 78 by this motion of the second latch/lift subassemblies 328. This motion also directs each of the lift rollers 340 upwardly into engagement with their corresponding roller 74 to “lift” the rollers 74 out of its corresponding roller aperture 20 formed in the cover support plates 19 along an at least substantially vertical path so as to dispose the lower surface of the rollers 74 in at least substantially co-planar relation with the upper surface of the cover support plates 19. In this regard, the second latch/lift subassemblies 328 are pivoted so as to dispose an at least substantially flat surface 341 of each lift roller 340 in at least substantially co-planar relation with the upper surface of the cover support plates 19. As such, there is a relatively smooth surface for rolling the cover 50 off of the body 10 of the cart 6. Having 2 or more second latch/lift subassemblies 328 on a pair of opposing sides of the cover 50 provides a certain stability during this movement (e.g., reduces the potential for a “teeter-totter” effect). When it is desired to reinstall the cover 50 on the body 10 and with the cover latch/lift assembly 272 being in the last referenced position, the handle 276 may be pivoted in the opposite direction to that noted above to move each of the components of the cover latch/lift assembly 272 in the opposite direction to that presented above to reinstall the latch 336 of each second latch/lift assembly 328 in the slot 78 of the corresponding first latch/lift subassembly 72. At this time, the handle 276 also of course maybe used to push the cart 6 for transportation of the same to another locale.
The material delivery system 2 may be used to provide parts to a station for assembly and/or processing of some kind. One embodiment of such an application is illustrated in FIG. 12 in the form of a station 400. The station 400 includes a table 404 which has a plurality of apertures 408 through which trays 428 stacked within a material delivery system 424 maybe disposed. That is, the material delivery system 424 is disposed below the table 404 or at a lower elevation that a work surface of the table 404. In the illustrated embodiment, the material delivery system 424 is not a portable unit, but is instead fixedly interconnected with the station 400. However, the material delivery system 424 includes all other relevant features of the material delivery system 2 discussed above (e.g., a material delivery elevator 100). Part transfer robot 412 many remove one or more parts from one or more of the trays 428 to provide the same to a turntable 416 where such parts may be acted upon by an operator, an assembly robot 420, or both. For instance, the station 400 may be used to assembly an actuator arm assembly stack for a disk drive device.
Either of the stations 400 or 432 (FIGS. 12-13) may be used in combination with the minienvironment 464 of FIG. 14, although certain adaptations maybe required. Moreover, each of the stations 400, 432 may be disposed in a clean room. Clean rooms or minienvironments typically have at least a certain air quality via appropriate filtering, and the use of the material delivery systems disclosed herein does not significantly affect this air quality. In this regard, the filtered environments in which the material delivery system 2 is particularly adapted for use therewith have a low contamination per unit volume, and the material delivery systems doe not have a substantial adverse effect on the cleanliness levels of such environments. Another way of characterizing these filtered environments is in reference to Federal Standard 209. The material delivery system 2 maybe used in a Class 100 environment or cleaner without significantly affecting the air quality. When sealed, the material delivery systems disclosed herein themselves are capable of maintaining a Class 10 environment.
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Ltd.Article storage house in a clean roomFR1330796A Title not availableJPH0590385A Title not availableJPH1074815A Title not availableJPH09162262A Title not availableJPS6010747A * Title not available* Cited by examinerReferenced byCiting PatentFiling datePublication dateApplicantTitleUS7311488 *Oct 18, 2004Dec 25, 2007Dms Co., Ltd.System and method for conveying flat panel displayUS20050089388 *Oct 18, 2004Apr 28, 2005Yong-Seok ParkSystem and method for conveying flat panel display* Cited by examinerClassifications U.S. Classification414/331.11International ClassificationB65G49/07, H01L21/677Cooperative ClassificationY10S414/14, Y10S414/135, H01L21/67775European ClassificationH01L21/677D8Legal EventsDateCodeEventDescriptionJul 30, 2002ASAssignmentOwner name: MAXTOR CORPORATION, COLORADOFree format text: ASSIGNMENT OF ASSIGNORS INTEREST;ASSIGNORS:MCCRANDALL, JOHN D.;MCMUNIGAL, TOM;RUPP, RICHARD E. 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