US20040069731A1 - Automated storage and retrieval system - Google Patents
Automated storage and retrieval system Download PDFInfo
- Publication number
- US20040069731A1 US20040069731A1 US10/268,177 US26817702A US2004069731A1 US 20040069731 A1 US20040069731 A1 US 20040069731A1 US 26817702 A US26817702 A US 26817702A US 2004069731 A1 US2004069731 A1 US 2004069731A1
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- United States
- Prior art keywords
- chain
- parts
- sprockets
- trays
- frame
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- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
- B65G—TRANSPORT OR STORAGE DEVICES, e.g. CONVEYORS FOR LOADING OR TIPPING, SHOP CONVEYOR SYSTEMS OR PNEUMATIC TUBE CONVEYORS
- B65G1/00—Storing articles, individually or in orderly arrangement, in warehouses or magazines
- B65G1/02—Storage devices
- B65G1/04—Storage devices mechanical
- B65G1/12—Storage devices mechanical with separate article supports or holders movable in a closed circuit to facilitate insertion or removal of articles the articles being books, documents, forms or the like
- B65G1/127—Storage devices mechanical with separate article supports or holders movable in a closed circuit to facilitate insertion or removal of articles the articles being books, documents, forms or the like the circuit being confined in a vertical plane
Definitions
- This invention relates generally to storage and retrieval systems and, more specifically, to automated parts storage and retrieval systems.
- the present invention provides an automated parts storage and retrieval system.
- the system of present invention more efficiently stores large numbers of parts in a single unit that is easy to access, maintains clean parts, and is easy to move about a factory floor with existing equipment.
- One embodiment of the system includes a frame, a plurality of trays configured to hold a plurality of parts, and a movement system attached to the frame and arranged to move the plurality of trays in a serpentine pattern for retrieval and storage of the plurality of parts.
- the movement system includes a plurality of sprockets arranged within the frame in a zigzag pattern, at least one chain toothedly engaged within the plurality of sprockets, and a drive motor configured to drive one of the plurality of sockets.
- the plurality of trays are rotatably attached to the at least one chain.
- Another aspect of the system includes a computer system for controlling the drive motor based on a selection using a parts selection component and position information sent by a position sensor.
- FIG. 1 is a perspective view of the present invention
- FIG. 3 is a perspective skeletal view of the present invention.
- FIG. 4 is a perspective view of the drive mechanisms for the present invention.
- FIG. 5 is a perspective view of drive shaft supports
- FIG. 6 is a side view of a portion of the present invention.
- FIG. 8 illustrates a graphical user interface formed in accordance with the present invention.
- FIG. 1 illustrates a perspective view of an automated storage and retrieval device 20 .
- the device 20 includes a main housing 60 that includes the chains, sprockets, and trays. Adjacent to the main housing 60 is a smaller housing section 64 that stores the encoder 34 , the drive motor 36 , the controller 32 , and the computer 30 . On top of the section 64 , suitably at a comfortable standing position for user interaction, is a display 48 and a user interface 46 .
- the device 20 includes forklift footings 88 attached to the base of the housing 60 that are sized to receive forklift forks. Lifting hooks (not shown) are attached to the top of the housing 60 .
- a parts selection window 80 is located on a front face of the housing 60 . Upon selection of a part using the computer 30 , the tray containing the part is moved to the window 80 .
- the computer 30 is preprogrammed to identify what parts are located on what tray within the system 20 .
- the encoder 34 provides a position signal that indicates the position of the trays within the chain and sprocket tray movement system 40 .
- the computer 30 receives the position signal from the encoder 34 .
- the user using the user interface 46 , makes a request for a part by interacting with the user interface 46 and the display 48 .
- the processor 44 sends a control signal to the controller 32 based on the request and the position signal.
- the controller 32 converts the control signal from the processor 44 into electrical signals for the drive motor 36 .
- the drive motor 36 then moves the chain accordingly.
- FIG. 3 illustrates a skeletal view of the housing 60 .
- the housing 60 is suitably formed of a welded aluminum internal frame 100 that supports the sprockets. In FIG. 3, trays are not shown for clarity purposes.
- the housing 60 includes first and second chain/sprocket sections 102 a and 102 b .
- the first and second chain/sprocket sections 102 a and 102 b are located on opposing sides of the frame 100 .
- the first side of the frame 100 includes a forward vertical beam 103 a and an aft vertical beam 104 a .
- the second side of the frame 100 includes a forward vertical beam 103 b and an aft vertical beam 104 b .
- a drive shaft 106 passes through the forward vertical beams 103 a,b and are attached to drive sprockets 108 a,b near the beams 103 a,b , respectively.
- Upper forward sprockets 110 a,b are rotatably mounted to an upper portion of the forward vertical beams 103 a,b , respectively.
- Upper aft sprockets 120 a,b (b is hidden by the frame 100 ) are rotatably attached to the aft beams 104 a,b , respectively, at approximately the same height as the sprockets 110 a,b.
- Upper middle sprockets 124 a,b (b is hidden by the frame 100 ) are rotatably attached to the frame 100 between the sprockets 110 a,b and sprockets 120 a,b , respectively.
- Middle aft sprockets 130 a,b are rotatably attached to the frame 100 slightly below the upper middle sprockets 124 a,b and slightly closer to the aft beam 104 a,b , respectively.
- Lower middle sprockets 134 a,b are rotatably attached to the frame 100 directly below the upper middle sprockets 124 a,b , below Middle aft sprockets 130 a,b , and above the drive sprockets 108 a,b .
- Lower aft sprockets 140 a,b are rotatably attached to the aft beam 104 a,b at the same height as the drive sprockets 108 a,b.
- Chains 146 a,b run through each set of sprockets in the following order: 108 a,b , 110 a,b , 120 a,b , 124 a,b , 130 a,b , 134 a,b , 140 a,b , then back to 108 a,b .
- the location of the sprockets is optimized based on the size of the trays that will connect to the chains.
- the chains and sprockets guide the trays through the housing 60 in a pattern that most efficiently uses the volume of space within the housing 60 .
- An example pattern is a zigzag or serpentine pattern that moves the trays through the volume of the housing 60 without running into other trays.
- the housing 60 holds a large amount of parts without occupying too much floor space or extending too high vertically.
- FIG. 4 illustrates a dampening device 150 that attaches between the shaft 106 and a shaft 152 from a drive motor 36 a .
- the shaft 106 passes through an encoder 34 a , then through a pillow block bearing assembly 156 mounted in the beam 103 a .
- the dampening device 150 dampens any sudden movements created by the motor 36 a thereby smoothly starting and stopping the shaft 106 .
- the encoder 36 a detects rotations of the shaft 106 and sends that information to the computer 30 through a data port.
- a non-limiting example of the drive motor 36 a is an Alling-Lander DC motor.
- a non-limiting example of the dampening device 150 is a Zero-max coupler.
- a non-limiting example of the encoder 34 a is a Dynapar encoder.
- the shaft 106 is supported between the drive sprockets 108 a,b by a pair of bearing shaft supports 180 and 182 .
- the shaft supports 180 and 182 are attached to the frame 100 (not shown).
- FIG. 6 illustrates a side view of the chain and sprocket tray movement system 40 .
- Trays 200 rotatably hang from opposing pins on each of the chains 124 a,b .
- Each tray 200 is attached at opposite ends to the chains 124 a,b in order to be level.
- the rotatably attached trays 200 are spaced apart enough to allow free-hanging motion throughout the travel of the chains 124 a,b .
- the chains 124 a,b moves around the sprockets, the trays 200 move about the space within the frame 100 .
- Bins 204 rest on the trays 200 .
- FIG. 7 illustrates attachment of each tray 200 to the chains 124 a,b .
- Each tray 200 includes a base 202 (FIG. 6) and end walls 206 that attach to the base 202 .
- An opening 210 in the end walls 204 receives a bolt 214 that attaches to a pin in the chain or is an extension of the pin in the chain.
- a spacer 212 is placed between the end walls 206 and the chains 124 a,b . The spacer 212 allows movement of the tray 200 about the bolt 214 , thereby allowing the tray to hang from the bolt 214 .
- the Chains 146 a,b are suitably standard ANSI 60 chains of equal length with ⁇ fraction (1/4) ⁇ inch integrated rivet/pin for attaching the trays.
- the trays are suitably made of stainless steel and the bins are made of plastic.
- FIG. 8 illustrates a user interface display window 250 that is presented on the display 48 .
- the user interface window 250 includes a pull-down scrollable window 256 that allows a user using a user interface device 46 to select parts that are stored within the system 20 .
- the computer 30 Once the user selects the parts from the list presented in the window 256 , the computer 30 generates a control signal that ends up causing the chain and sprocket tray movement system to rotate to present the tray that includes the selected part within the window 80 of the housing 60 .
Abstract
An automated parts storage and retrieval method is provided. The method includes a frame, a plurality of trays configured to hold a plurality of parts, and a movement method attached to the frame and arranged to move the plurality of trays in a serpentine pattern for retrieval and storage of the plurality of parts. The movement method includes a plurality of sprockets arranged within the frame in a zigzag pattern, at least one chain toothedly engaged within the plurality of sprockets, and a drive motor configured to drive one of the plurality of sockets. The plurality of trays are rotatably attached to the at least one chain. The method includes a computer method for controlling the drive motor based on a selection using a parts selection component and position information sent by a position sensor.
Description
- This invention relates generally to storage and retrieval systems and, more specifically, to automated parts storage and retrieval systems.
- Many manufacturing processes entail steps that include a choice of a great number of different kinds or types of parts. The parts must be readily available to the people performing the manufacturing process steps in order for the manufacturing process to be as efficient as possible.
- Many times, due to the vast amounts of different types of parts, the parts can be difficult to find because they are stored in various bins located in several places on a factory floor. The more time that is spent looking for parts, the longer it takes to manufacture the product, thereby increasing the cost of the product. Also, facilities that are used for holding vast amounts of parts take up valuable floor space. The parts are stored in opened containers, thus exposing the parts to a factory floor environment and requiring the parts to be cleaned before use. Cleaning of parts causes even more delays as well as unnecessarily exposing employees to cleaning solvents.
- An example of this manufacturing process is presented by aircraft manufacturing. For example, over 900 different, prefabricated shims are stored in cardboard boxes on roller racks on a factory floor. The shims get dirty due to being exposed to a machine shop-like factory floor environment and must be cleaned thoroughly before application. The roller racks that hold the cardboard boxes take up hundreds of square feet of floor space.
- Various proposals have been presented for more efficiently storing and retrieving parts. However, in a manufacturing process that entails extremely large numbers of parts, the storage and retrieval device that have been proposed take up large areas of floor space or are very tall and bulky. It is difficult and expensive to redesign a factory floor to accommodate a storage and retrieval device that is tall and bulky. Further, it is very difficult to move such a device easily and efficiently around the factory floor.
- Therefore, there exists an unmet need for an automated storage and retrieval system that takes up less space, keeps parts clean, aides in organizing and stabilizing inventory, and is easily movable about a factory floor.
- The present invention provides an automated parts storage and retrieval system. The system of present invention more efficiently stores large numbers of parts in a single unit that is easy to access, maintains clean parts, and is easy to move about a factory floor with existing equipment.
- One embodiment of the system includes a frame, a plurality of trays configured to hold a plurality of parts, and a movement system attached to the frame and arranged to move the plurality of trays in a serpentine pattern for retrieval and storage of the plurality of parts. The movement system includes a plurality of sprockets arranged within the frame in a zigzag pattern, at least one chain toothedly engaged within the plurality of sprockets, and a drive motor configured to drive one of the plurality of sockets.
- According to an aspect of the invention, the plurality of trays are rotatably attached to the at least one chain.
- Another aspect of the system includes a computer system for controlling the drive motor based on a selection using a parts selection component and position information sent by a position sensor.
- The preferred and alternative embodiments of the present invention are described in detail below with reference to the following drawings.
- FIG. 1 is a perspective view of the present invention;
- FIG. 2 is a block diagram of an automated storage and retrieval system formed in accordance with the present invention;
- FIG. 3 is a perspective skeletal view of the present invention;
- FIG. 4 is a perspective view of the drive mechanisms for the present invention;
- FIG. 5 is a perspective view of drive shaft supports;
- FIG. 6 is a side view of a portion of the present invention;
- FIG. 7 is a perspective view of a connection between a chain and a parts tray; and
- FIG. 8 illustrates a graphical user interface formed in accordance with the present invention.
- FIG. 1 illustrates a perspective view of an automated storage and
retrieval device 20. Thedevice 20 includes amain housing 60 that includes the chains, sprockets, and trays. Adjacent to themain housing 60 is asmaller housing section 64 that stores theencoder 34, thedrive motor 36, thecontroller 32, and thecomputer 30. On top of thesection 64, suitably at a comfortable standing position for user interaction, is adisplay 48 and auser interface 46. Thedevice 20 includesforklift footings 88 attached to the base of thehousing 60 that are sized to receive forklift forks. Lifting hooks (not shown) are attached to the top of thehousing 60. - A
parts selection window 80 is located on a front face of thehousing 60. Upon selection of a part using thecomputer 30, the tray containing the part is moved to thewindow 80. - FIG. 2 illustrates a block diagram of the non-limiting example automated storage and
retrieval system 20 that stores and provides automated access to large amounts of parts in a small space. Thesystem 20 includes acomputer 30 that is suitably coupled to acontroller 32. Thecontroller 32 and thesystem 20 are coupled to a chain and sprockettray movement system 40. The chain and sprockettray movement system 40 include anencoder 34 and adrive motor 36. The chain and sprockettray movement system 40 also includes one or more chains that serpentine around sprockets. The chains support trays that support part bins. The chain, sprockets, trays, and bins are shown in the following figures. Thecomputer 30 includes aprocessor 44 that is coupled to theuser interface 46, and adisplay 48. Thecomputer 30 is suitably a programmable logic controller (PLC), such as that produced by Allen-Bradley, Inc. - In one non-limiting embodiment, the
computer 30 is preprogrammed to identify what parts are located on what tray within thesystem 20. Theencoder 34 provides a position signal that indicates the position of the trays within the chain and sprockettray movement system 40. Thecomputer 30 receives the position signal from theencoder 34. The user, using theuser interface 46, makes a request for a part by interacting with theuser interface 46 and thedisplay 48. Theprocessor 44 sends a control signal to thecontroller 32 based on the request and the position signal. Thecontroller 32 converts the control signal from theprocessor 44 into electrical signals for thedrive motor 36. Thedrive motor 36 then moves the chain accordingly. - The following figures illustrate a non-limiting example embodiment of the automated storage and
retrieval system 20. FIG. 3 illustrates a skeletal view of thehousing 60. Thehousing 60 is suitably formed of a welded aluminuminternal frame 100 that supports the sprockets. In FIG. 3, trays are not shown for clarity purposes. Thehousing 60 includes first and second chain/sprocket sections sprocket sections frame 100. The first side of theframe 100 includes a forwardvertical beam 103 a and an aftvertical beam 104 a. The second side of theframe 100 includes a forwardvertical beam 103 b and an aftvertical beam 104 b. Adrive shaft 106 passes through the forwardvertical beams 103 a,b and are attached to drivesprockets 108 a,b near thebeams 103 a,b, respectively. Upperforward sprockets 110 a,b are rotatably mounted to an upper portion of the forwardvertical beams 103 a,b, respectively. Upperaft sprockets 120 a,b (b is hidden by the frame 100) are rotatably attached to theaft beams 104 a,b, respectively, at approximately the same height as thesprockets 110 a,b. - Upper
middle sprockets 124 a,b (b is hidden by the frame 100) are rotatably attached to theframe 100 between thesprockets 110 a,b andsprockets 120 a,b, respectively. Middleaft sprockets 130 a,b are rotatably attached to theframe 100 slightly below the uppermiddle sprockets 124 a,b and slightly closer to theaft beam 104 a,b, respectively. Lowermiddle sprockets 134 a,b are rotatably attached to theframe 100 directly below the uppermiddle sprockets 124 a,b, below Middle aftsprockets 130 a,b, and above thedrive sprockets 108 a,b. Loweraft sprockets 140 a,b are rotatably attached to theaft beam 104 a,b at the same height as thedrive sprockets 108 a,b. -
Chains 146 a,b run through each set of sprockets in the following order: 108 a,b, 110 a,b, 120 a,b, 124 a,b, 130 a,b, 134 a,b, 140 a,b, then back to 108 a,b. The location of the sprockets is optimized based on the size of the trays that will connect to the chains. The chains and sprockets guide the trays through thehousing 60 in a pattern that most efficiently uses the volume of space within thehousing 60. An example pattern is a zigzag or serpentine pattern that moves the trays through the volume of thehousing 60 without running into other trays. Thus, thehousing 60 holds a large amount of parts without occupying too much floor space or extending too high vertically. - FIG. 4 illustrates a dampening
device 150 that attaches between theshaft 106 and ashaft 152 from adrive motor 36 a. Theshaft 106 passes through anencoder 34 a, then through a pillowblock bearing assembly 156 mounted in thebeam 103 a. The dampeningdevice 150 dampens any sudden movements created by themotor 36 a thereby smoothly starting and stopping theshaft 106. Theencoder 36 a detects rotations of theshaft 106 and sends that information to thecomputer 30 through a data port. A non-limiting example of thedrive motor 36 a is an Alling-Lander DC motor. A non-limiting example of the dampeningdevice 150 is a Zero-max coupler. A non-limiting example of theencoder 34 a is a Dynapar encoder. - As shown in FIG. 5, the
shaft 106 is supported between thedrive sprockets 108 a,b by a pair of bearing shaft supports 180 and 182. The shaft supports 180 and 182 are attached to the frame 100 (not shown). - FIG. 6 illustrates a side view of the chain and sprocket
tray movement system 40.Trays 200 rotatably hang from opposing pins on each of thechains 124 a,b. Eachtray 200 is attached at opposite ends to thechains 124 a,b in order to be level. The rotatably attachedtrays 200 are spaced apart enough to allow free-hanging motion throughout the travel of thechains 124 a,b. As thechains 124 a,b moves around the sprockets, thetrays 200 move about the space within theframe 100.Bins 204 rest on thetrays 200. - FIG. 7 illustrates attachment of each
tray 200 to thechains 124 a,b. Eachtray 200 includes a base 202 (FIG. 6) and endwalls 206 that attach to thebase 202. Anopening 210 in theend walls 204 receives abolt 214 that attaches to a pin in the chain or is an extension of the pin in the chain. Aspacer 212 is placed between theend walls 206 and thechains 124 a,b. Thespacer 212 allows movement of thetray 200 about thebolt 214, thereby allowing the tray to hang from thebolt 214. In one non-limiting example, theChains 146 a,b are suitablystandard ANSI 60 chains of equal length with {fraction (1/4)} inch integrated rivet/pin for attaching the trays. The trays are suitably made of stainless steel and the bins are made of plastic. - FIG. 8 illustrates a user
interface display window 250 that is presented on thedisplay 48. Theuser interface window 250 includes a pull-downscrollable window 256 that allows a user using auser interface device 46 to select parts that are stored within thesystem 20. Once the user selects the parts from the list presented in thewindow 256, thecomputer 30 generates a control signal that ends up causing the chain and sprocket tray movement system to rotate to present the tray that includes the selected part within thewindow 80 of thehousing 60. - While the preferred embodiment of the invention has been illustrated and described, as noted above, many changes can be made without departing from the spirit and scope of the invention. Accordingly, the scope of the invention is not limited by the disclosure of the preferred embodiment. Instead, the invention should be determined entirely by reference to the claims that follow.
Claims (14)
1. An automated parts storage and retrieval system, comprising:
a frame;
a plurality of trays configured to hold a plurality of parts; and
a movement system attached to the frame and arranged to move the plurality of trays in a serpentine pattern for retrieval and storage of the plurality of parts.
2. The system of claim 1 , wherein the movement system includes a chain and sprocket drive system.
3. The system of claim 2 , wherein the chain and sprocket system includes:
a plurality of sprockets arranged within the frame in a zigzag pattern;
at least one chain toothedly engaged within the plurality of sprockets; and
a drive motor configured to drive one of the plurality of sockets.
4. The system of claim 3 , wherein the plurality of trays are rotatably attached to the at least one chain.
5. The system of claim 3 , further comprising a computer system for controlling the drive motor.
6. The system of claim 5 , wherein the computer system includes a parts selection component for allowing a user to select from a list of parts included in the system.
7. The system of claim 6 , wherein the chain and sprocket system includes a position determining component for sending position information to the computer system.
8. The system of claim 7 , wherein the computer system generates a drive motor control signal based on a selection using the parts selection component and the sent position information.
9. An automated parts storage and retrieval system, comprising:
a frame;
a plurality of trays configured to hold a plurality of parts; and
a movement system including:
a drive motor;
a chain and sprockets configured to support the plurality of trays,
wherein the sprockets are rotatably attached to the frame,
wherein the chain is toothedly attached to the sprockets in a serpentine pattern for retrieval and storage of the plurality of parts;
a position determining component for determining the position of the chain;
a computer system including a user interface for selecting a part,
wherein the computer system controls the drive motor based on the determined position of the chain and a selected part.
10. An automated parts storage and retrieval method, comprising:
supporting a plurality of trays on one or more chain;
toothedly attaching the one or more chain to a plurality of sprockets that are rotatably attached to a frame in a zigzag pattern;
driving at least one of the sprockets with a drive motor.
11. The method of claim 10 , further comprising sensing the position of the one or more chains.
12. The method of claim 11 , further comprising programming a controller to associate a part located on a tray with a position of the one or more chains.
13. The method of claim 12 , further comprising selecting a part.
14. The method of claim 13 , further comprising controlling the drive motor based on the selected part, the sensed position, and the programmed controller.
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US10/268,177 US6729482B1 (en) | 2002-10-09 | 2002-10-09 | Automated storage and retrieval system |
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US10/268,177 US6729482B1 (en) | 2002-10-09 | 2002-10-09 | Automated storage and retrieval system |
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US6729482B1 US6729482B1 (en) | 2004-05-04 |
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Cited By (4)
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WO2007034197A1 (en) * | 2005-09-22 | 2007-03-29 | Airbus Uk Limited | Assembly of aircraft components |
EP2234213A1 (en) | 2009-03-26 | 2010-09-29 | Mbd S.R.L. | Joint for transmitting and distributing electric power, electric signals, or several pressurised fluids, particularly adapted for machines for calibrating and smoothing stone materials |
CN103565175A (en) * | 2013-11-21 | 2014-02-12 | 陈雪婵 | Worm type commodity display cabinet provided with inner spline rings and position sensors |
US20180300920A1 (en) * | 2017-04-14 | 2018-10-18 | Gulfstream Aerospace Corporation | Systems and methods for providing a virtual aircraft build process |
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GB0519324D0 (en) * | 2005-09-22 | 2005-11-02 | Michael Sheridan & Company Ltd | Display unit |
US20110014017A1 (en) * | 2009-07-14 | 2011-01-20 | Pflow Industries, Inc. | Storage retrieval machine |
US8650042B2 (en) * | 2011-09-30 | 2014-02-11 | Mckesson Automation Inc. | Case and medication tracking |
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US4676560A (en) * | 1985-02-08 | 1987-06-30 | Bellheimer Metallwerk Gmbh | Circulating rack |
US6170929B1 (en) * | 1998-12-02 | 2001-01-09 | Ronald H. Wilson | Automated medication-dispensing cart |
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US3970349A (en) * | 1974-05-03 | 1976-07-20 | Sperry Rand Corporation | Gravity stabilized internesting carrier system for mechanized filing and storage cabinets |
US3955267A (en) * | 1974-08-26 | 1976-05-11 | Fadal Engineering Company, Inc. | Attachment for automating milling machines |
US4650264A (en) * | 1983-12-12 | 1987-03-17 | Spacesaver Corporation | Control system for vertical storage equipment |
US4676560A (en) * | 1985-02-08 | 1987-06-30 | Bellheimer Metallwerk Gmbh | Circulating rack |
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Publication number | Priority date | Publication date | Assignee | Title |
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WO2007034197A1 (en) * | 2005-09-22 | 2007-03-29 | Airbus Uk Limited | Assembly of aircraft components |
US20080256788A1 (en) * | 2005-09-22 | 2008-10-23 | Airbus Uk Limited | Assembly of Aircraft Components |
EP2216248A1 (en) * | 2005-09-22 | 2010-08-11 | Airbus Operations Limited | Assembly of aircraft components |
US8479394B2 (en) | 2005-09-22 | 2013-07-09 | Airbus Operations Limited | Assembly of aircraft components |
EP2234213A1 (en) | 2009-03-26 | 2010-09-29 | Mbd S.R.L. | Joint for transmitting and distributing electric power, electric signals, or several pressurised fluids, particularly adapted for machines for calibrating and smoothing stone materials |
CN103565175A (en) * | 2013-11-21 | 2014-02-12 | 陈雪婵 | Worm type commodity display cabinet provided with inner spline rings and position sensors |
US20180300920A1 (en) * | 2017-04-14 | 2018-10-18 | Gulfstream Aerospace Corporation | Systems and methods for providing a virtual aircraft build process |
US10672166B2 (en) * | 2017-04-14 | 2020-06-02 | Gulfstream Aerospace Corporation | Systems and methods for providing a virtual aircraft build process |
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US6729482B1 (en) | 2004-05-04 |
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