EP2132004B1 - Vacuum plate - Google Patents
Vacuum plate Download PDFInfo
- Publication number
- EP2132004B1 EP2132004B1 EP08715603.0A EP08715603A EP2132004B1 EP 2132004 B1 EP2132004 B1 EP 2132004B1 EP 08715603 A EP08715603 A EP 08715603A EP 2132004 B1 EP2132004 B1 EP 2132004B1
- Authority
- EP
- European Patent Office
- Prior art keywords
- aperture
- vacuum
- air
- plate
- vacuum plate
- Prior art date
- 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.)
- Active
Links
- 230000008878 coupling Effects 0.000 claims description 14
- 238000010168 coupling process Methods 0.000 claims description 14
- 238000005859 coupling reaction Methods 0.000 claims description 14
- 230000003584 silencer Effects 0.000 claims description 10
- 238000011144 upstream manufacturing Methods 0.000 claims description 5
- 239000000463 material Substances 0.000 claims description 4
- 238000004891 communication Methods 0.000 claims description 3
- 229920001971 elastomer Polymers 0.000 claims 2
- 229920000642 polymer Polymers 0.000 claims 1
- 229920001296 polysiloxane Polymers 0.000 claims 1
- 229920002635 polyurethane Polymers 0.000 claims 1
- 239000004814 polyurethane Substances 0.000 claims 1
- 238000010276 construction Methods 0.000 description 5
- XUIMIQQOPSSXEZ-UHFFFAOYSA-N Silicon Chemical compound [Si] XUIMIQQOPSSXEZ-UHFFFAOYSA-N 0.000 description 3
- 230000000694 effects Effects 0.000 description 3
- 229910052710 silicon Inorganic materials 0.000 description 3
- 239000010703 silicon Substances 0.000 description 3
- 239000012530 fluid Substances 0.000 description 2
- 238000003754 machining Methods 0.000 description 2
- 238000000034 method Methods 0.000 description 2
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 description 1
- 229910052799 carbon Inorganic materials 0.000 description 1
- 239000003575 carbonaceous material Substances 0.000 description 1
- 238000004140 cleaning Methods 0.000 description 1
- 239000000428 dust Substances 0.000 description 1
- 239000003344 environmental pollutant Substances 0.000 description 1
- 239000000696 magnetic material Substances 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- 229910052751 metal Inorganic materials 0.000 description 1
- 150000002739 metals Chemical class 0.000 description 1
- 231100000719 pollutant Toxicity 0.000 description 1
- 239000002861 polymer material Substances 0.000 description 1
- -1 shavings Substances 0.000 description 1
Images
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B25—HAND TOOLS; PORTABLE POWER-DRIVEN TOOLS; MANIPULATORS
- B25B—TOOLS OR BENCH DEVICES NOT OTHERWISE PROVIDED FOR, FOR FASTENING, CONNECTING, DISENGAGING OR HOLDING
- B25B11/00—Work holders not covered by any preceding group in the subclass, e.g. magnetic work holders, vacuum work holders
- B25B11/005—Vacuum work holders
Definitions
- the present invention provides a vacuum plate for releasably fastening workpieces.
- magnets and vacuum plates are used as an alternative to mechanical fastening means as clamps, bolts and the like.
- magnets only work when the workpiece to be machined is made from a magnetic material this invariably limits its use for other materials, such as for example certain light metals, carbon or polymer materials.
- the prior art vacuum plate see for example a vacuum plate disclosed in GB2403680 which comprises a number of suction apertures which are connected to a source of vacuum.
- This arrangement besides being very expensive due to the cost of a suitable source of vacuum, having the necessary power to be able to fix the work pieces, also has a number of drawbacks.
- the suction action is directed to the suction apertures in the vacuum plate. When the work piece is smaller than the plate, some of the suction apertures are not covered. This, in addition to create noise, also makes it possible for material, such as shavings, dust or other pollution may enter the suction channels/ducts, which connect the suction aperture to the source of vacuum.
- DE 101 24 315 C1 discloses a vacuum clamping system comprising a plurality of individually movable suction clamps for releasably fastening items to be worked on to surfaces of said suction clamps, wherein each suction clamp comprises a coupling for allowing a source of pressurised air to be connected to the respective suction clamp and a box structure, wherein the top surface of the box structure is provided with a single aperture which is connected to the coupling and wherein the volume enclosed by the box structure comprises a single air duct connecting the coupling to the single aperture, such that an airflow may be created past the aperture, and wherein upstream in relation to the aperture in the air duct a venturi is arranged, and downstream from said aperture an air outlet is provided, and wherein further the aperture is in communication with the air duct, at the venturi.
- Document DE 101 51 635 A1 shows a vacuum plate in which the vacuum is generated with pressurized air.
- the invention addresses this by providing a vacuum plate according to claim 1.
- the present invention connects to a source of pressurised air which is a much cheaper device than a vacuum device and at the same time for most work shops a source of pressurised air is available at most work stations. Therefore, in order to implement the present invention at a number of work stations it is not necessary to change the constructions surrounding the work stations, but simply by adding a side pipe connection to the existing source of pressurised air it becomes possible to drive the vacuum plate according to the invention.
- a silencer is provided in the air duct downstream of the aperture and upstream of the outlet.
- Pressurised air may when the air flow is altered create a relatively loud noise, but this noise may be contained by guiding the air flow into a silencer, for example an enlarged section inside the vacuum plate where the energy is dissipated from the pressurised air and thereby the noise is contained inside the vacuum plate.
- one common silencer is provided down stream of the apertures and connected to all air ducts, and where one common outlet is connected to the silencer.
- This may be advantageous in that a relatively large silencer room may be provided in each vacuum plate. In addition to creating a cheaper construction due to less machining of the vacuum plate, this also provides for a lighter construction which will be easier to handle and more work-friendly.
- the air pressure of the source of pressurised air is in the range of 4 bars to 12 bars, more preferred 6 bars to 8 bars, and where 20 to 80 litres air per minute are supplied, more preferred 30 to 60 litres per minute, and most preferred 40 to 50 litres per minute.
- the relatively low pressures in combination with the relatively low amount of air being used per minute create a relatively strong vacuum due to the sign of the venturi and at the same time makes it possible to utilize commonly available sources or pressurised air such that in order to implement the present invention it is not necessary to purchase expensive equipment in order to create the necessary pressurised air flow.
- the vacuum plate may in a further advantageous embodiment have a size and construction where the air ducts are integral with the bottom or top plate, and the vacuum plate is 500 mm by 1000 mm, more preferred 600 mm by 400 mm and between 20 mm to 60 mm thick.
- more preferred 4 and 8 apertures are provided in the top plate.
- the apertures are the points where the vacuum is created in the top plate and therefore also the points where the piece to be worked on are attached to the vacuum plate, and according to the size of the vacuum plate and the size of the work piece to be machined any number of apertures may be implemented in the top plate with corresponding air ducts provided underneath inside the box structure, but for many purposes between 2 and 10 apertures will provide a vacuum plate which is able to address most purposes.
- the invention uses pressurised air as the source for creating the necessary underpressure which will be referred to as vacuum. It is acknowledged that the scientific term vacuum is not corresponding to the term within this patent, but within this context vacuum is designated to mean sufficient underpressure in order to releasably fasten a workpiece to the apparatus according to the invention.
- the Venturi effect is a special case of Bernoulli's principle, in the case of fluid or air flow through a tube or pipe with a constriction in it.
- the fluid must speed up in the restriction, reducing its pressure and producing a partial vacuum via the Bernoulli effect. It is named after Giovanni Battista Venturi, (1746-1822), an Italian physicist.
- the vacuum created by the venturi is used in order to create the desired holding of the workpiece on the vacuum plate.
- FIG 1 is illustrated a vacuum plate 1 arranged in a tool holder 2 in a grinding machine.
- the fact that it is a grinding machine is not important relating to the vacuum plate in that any type of machine where it is desirable to fixate objects in order to work on these objects are suitable to be used with the vacuum plate according to the invention.
- the vacuum plate 1 comprises a top plate 3 which in this embodiment is provided with a pattern (relief) such that the debris, shavings and the like will be lodged in the lower part of the relief pattern whereby the work piece to be worked on touches the uppermost parts of the relief pattern in order to achieve a stable support.
- the work piece may be positioned anywhere on the vacuum plate 1. In this example however the workpiece may be positioned overlapping the white line representing a silicon seal 4.
- the work piece will in this illustration be placed substantially central on the top plate 3 of the vacuum plate 1.
- the silicon seal delimits an area and will abut against the underside of the work piece to be worked on as will be evident from figure 3 and will thereby limit a space formed by the top plate 3, the silicon seal 4 and the underside of the work piece (not illustrated).
- an aperture 5 Centrally in this limited area is an aperture 5 which aperture when a source of pressurised air is attached to the vacuum plate will create a vacuum as will be explained below.
- a plurality of apertures 5' is illustrated and any number according to the purpose may be provided.
- a source of pressurised air 6 is connected for example by a rapid coupling device 7 to the vacuum plate. Rapid coupling devices are in widespread use is workshops and do not require any special skills of the operator, so that it is easy for any user to attach the source of pressurised air 6 by means of a rapid coupling device 7 to the vacuum plate 1 according to the invention.
- FIG 2 a cross section through the vacuum plate 1 is illustrated.
- the pressurised air will be supplied through the coupling 7 in the direction of the arrow 10.
- an air duct 8 which air duct is partly constricted upstream from the aperture 5 being connected to the air duct.
- the constriction creates the venturi effect (see above).
- the venturi 9 will as explained above create a partial vacuum downstream from the constriction such that due to the connection to the aperture 5 a vacuum will be present between the work piece 11 and the top plate 3 of the vacuum plate according to the invention.
- a silencer 12 is provided downstream of the aperture 5 in order to dissipate the energy in the air supplied by the source of pressurised air and thereby taking the noise out of the air which after passing the silencer may be dissipated to the surroundings through the outlet 13.
- FIG 3 the top plate is illustrated in a plane view where an arbitrary number of apertures 5' are illustrated.
- the coupling for allowing the source of pressurised air 6 to be connected to the vacuum plate is also illustrated.
- air ducts are connecting the coupling 7 with each aperture 5' either in a way such that each aperture 5' is connected by a separate air duct connecting the coupling 7 to that particular aperture or that a limited number of air ducts connects one or more apertures.
- vacuum plates having a size fitting into the tool holders 2 of common machines where these types of vacuum plates are applicable are most desired.
- the air ducts 8, the venturis 9, the silencers 12 and the outlets 13 may be machined into the bottom plate 15 of the vacuum plate 1.
- the bottom plate 15 is separated from the top plate by a dashed line 16 in this example such that the top plate is very thin and the bottom plate 15 is relatively thick, but other divisions may also be feasible.
- the top plate 3 may be provided with a bottom plate and an intermediate plate corresponding to the plate 15 wherein the air ducts are integrated.
- a further alternative may include a construction where the air ducts are in the shape of pipes such that the top plate and the bottom plate create a box shape together with a side member .
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Treatment Of Fiber Materials (AREA)
- Machine Tool Units (AREA)
- Jet Pumps And Other Pumps (AREA)
Description
- The present invention provides a vacuum plate for releasably fastening workpieces.
- In the art of machining work pieces it is well known to fasten the material piece to be worked on to the machine. For example when desiring to drill, mill or grind objects these are usually by means of clamps, bolts or the like fastened to the machine. Thereafter the working process may be carried out and afterwards the work piece may be released from the machine.
- As an alternative to mechanical fastening means as clamps, bolts and the like, magnets and vacuum plates are used.
- As magnets only work when the workpiece to be machined is made from a magnetic material this invariably limits its use for other materials, such as for example certain light metals, carbon or polymer materials.
- The prior art vacuum plate, see for example a vacuum plate disclosed in
GB2403680 -
DE 101 24 315 C1 discloses a vacuum clamping system comprising a plurality of individually movable suction clamps for releasably fastening items to be worked on to surfaces of said suction clamps, wherein each suction clamp comprises a coupling for allowing a source of pressurised air to be connected to the respective suction clamp and a box structure, wherein the top surface of the box structure is provided with a single aperture which is connected to the coupling and wherein the volume enclosed by the box structure comprises a single air duct connecting the coupling to the single aperture, such that an airflow may be created past the aperture, and wherein upstream in relation to the aperture in the air duct a venturi is arranged, and downstream from said aperture an air outlet is provided, and wherein further the aperture is in communication with the air duct, at the venturi. - Document
DE 101 51 635 A1 shows a vacuum plate in which the vacuum is generated with pressurized air. - It is consequently an object of the present invention to alleviate the disadvantages with the prior art devices and at the same time provide an apparatus which will not be polluted and thereby clog up and be the cause of down time and costly cleaning processes and which is easy and cheap to use.
- The invention addresses this by providing a vacuum plate according to
claim 1. - Instead of connecting the vacuum plate to a source of vacuum the present invention connects to a source of pressurised air which is a much cheaper device than a vacuum device and at the same time for most work shops a source of pressurised air is available at most work stations. Therefore, in order to implement the present invention at a number of work stations it is not necessary to change the constructions surrounding the work stations, but simply by adding a side pipe connection to the existing source of pressurised air it becomes possible to drive the vacuum plate according to the invention. By arranging an air duct under the aperture and communicating with an aperture in the top side of the top plate, i.e. on the surface on which the pieces to be worked on are meant to be releasably fastened, it becomes possible to create an underpressure immediately adjacent the aperture just below the surface of the top plate. This is done by creating an increased air speed by means of a venturi right before the aperture's communication with the air duct and allowing this pressurised air through the venturi to propagate outside the vacuum plate. In this manner even if polluting items such as shaves, chips or the like enter the aperture and thereby the air duct, the pressurised air and the air flow created by the pressurised air will blow the pollutants out through the opposite end of the vacuum plate as there need not be any restrictions to the air flow once the air flow has passed the venturi and thereby created the underpressure adjacent the aperture in the top plate.
- In a further advantageous embodiment of the invention a silencer is provided in the air duct downstream of the aperture and upstream of the outlet.
- Pressurised air may when the air flow is altered create a relatively loud noise, but this noise may be contained by guiding the air flow into a silencer, for example an enlarged section inside the vacuum plate where the energy is dissipated from the pressurised air and thereby the noise is contained inside the vacuum plate.
- In a still further advantageous embodiment of the invention one common silencer is provided down stream of the apertures and connected to all air ducts, and where one common outlet is connected to the silencer. This may be advantageous in that a relatively large silencer room may be provided in each vacuum plate. In addition to creating a cheaper construction due to less machining of the vacuum plate, this also provides for a lighter construction which will be easier to handle and more work-friendly.
- In a still further advantageous embodiment the air pressure of the source of pressurised air is in the range of 4 bars to 12 bars, more preferred 6 bars to 8 bars, and where 20 to 80 litres air per minute are supplied, more preferred 30 to 60 litres per minute, and most preferred 40 to 50 litres per minute. The relatively low pressures in combination with the relatively low amount of air being used per minute create a relatively strong vacuum due to the sign of the venturi and at the same time makes it possible to utilize commonly available sources or pressurised air such that in order to implement the present invention it is not necessary to purchase expensive equipment in order to create the necessary pressurised air flow.
- In order to foresee different working situations the vacuum plate may in a further advantageous embodiment have a size and construction where the air ducts are integral with the bottom or top plate, and the vacuum plate is 500 mm by 1000 mm, more preferred 600 mm by 400 mm and between 20 mm to 60 mm thick. These sizes of vacuum plates make it possible that the plates are handled by a single worker in that the weight of such a device is relatively low, i.e. from about 10-20 kilos and therefore may easily be handled by a worker without any lifting aids.
- In a still further advantageous embodiment between 2 and 10 apertures, more preferred 4 and 8 apertures are provided in the top plate. The apertures are the points where the vacuum is created in the top plate and therefore also the points where the piece to be worked on are attached to the vacuum plate, and according to the size of the vacuum plate and the size of the work piece to be machined any number of apertures may be implemented in the top plate with corresponding air ducts provided underneath inside the box structure, but for many purposes between 2 and 10 apertures will provide a vacuum plate which is able to address most purposes.
- The invention will now be explained with reference to the accompanying figures, wherein
- Fig. 1
- illustrates a vacuum plate according to the invention arranged in a machine tool holder;
- Fig. 2
- illustrates a cross section through a vacuum plate
- Fig. 3
- illustrates a perspective view of a corner of a work plate
- The invention uses pressurised air as the source for creating the necessary underpressure which will be referred to as vacuum. It is acknowledged that the scientific term vacuum is not corresponding to the term within this patent, but within this context vacuum is designated to mean sufficient underpressure in order to releasably fasten a workpiece to the apparatus according to the invention.
- This is achieved by arranging a venturi in the air flow channel inside the device. A venture is a partial constriction of the airflow channel, whereby the so-called venture-effect occurs.
- The Venturi effect is a special case of Bernoulli's principle, in the case of fluid or air flow through a tube or pipe with a constriction in it. The fluid must speed up in the restriction, reducing its pressure and producing a partial vacuum via the Bernoulli effect. It is named after Giovanni Battista Venturi, (1746-1822), an Italian physicist.
- The vacuum created by the venturi is used in order to create the desired holding of the workpiece on the vacuum plate.
- In
figure 1 is illustrated avacuum plate 1 arranged in a tool holder 2 in a grinding machine. The fact that it is a grinding machine is not important relating to the vacuum plate in that any type of machine where it is desirable to fixate objects in order to work on these objects are suitable to be used with the vacuum plate according to the invention. - The
vacuum plate 1 comprises atop plate 3 which in this embodiment is provided with a pattern (relief) such that the debris, shavings and the like will be lodged in the lower part of the relief pattern whereby the work piece to be worked on touches the uppermost parts of the relief pattern in order to achieve a stable support. The work piece may be positioned anywhere on thevacuum plate 1. In this example however the workpiece may be positioned overlapping the white line representing asilicon seal 4. The work piece will in this illustration be placed substantially central on thetop plate 3 of thevacuum plate 1. The silicon seal delimits an area and will abut against the underside of the work piece to be worked on as will be evident fromfigure 3 and will thereby limit a space formed by thetop plate 3, thesilicon seal 4 and the underside of the work piece (not illustrated). Centrally in this limited area is an aperture 5 which aperture when a source of pressurised air is attached to the vacuum plate will create a vacuum as will be explained below. In the illustrated embodiment a plurality of apertures 5' is illustrated and any number according to the purpose may be provided. - A source of pressurised air 6 is connected for example by a
rapid coupling device 7 to the vacuum plate. Rapid coupling devices are in widespread use is workshops and do not require any special skills of the operator, so that it is easy for any user to attach the source of pressurised air 6 by means of arapid coupling device 7 to thevacuum plate 1 according to the invention. - Turning to
figure 2 a cross section through thevacuum plate 1 is illustrated. The pressurised air will be supplied through thecoupling 7 in the direction of thearrow 10. Inside thevacuum plate 1 is provided an air duct 8 which air duct is partly constricted upstream from the aperture 5 being connected to the air duct. The constriction creates the venturi effect (see above). The venturi 9 will as explained above create a partial vacuum downstream from the constriction such that due to the connection to the aperture 5 a vacuum will be present between thework piece 11 and thetop plate 3 of the vacuum plate according to the invention. - In this embodiment a
silencer 12 is provided downstream of the aperture 5 in order to dissipate the energy in the air supplied by the source of pressurised air and thereby taking the noise out of the air which after passing the silencer may be dissipated to the surroundings through theoutlet 13. - Turning to
figure 3 the top plate is illustrated in a plane view where an arbitrary number of apertures 5' are illustrated. The coupling for allowing the source of pressurised air 6 to be connected to the vacuum plate is also illustrated. In the vacuum plate air ducts are connecting thecoupling 7 with each aperture 5' either in a way such that each aperture 5' is connected by a separate air duct connecting thecoupling 7 to that particular aperture or that a limited number of air ducts connects one or more apertures. - As is evident from the explanation above there are many variations possible for a vacuum plate according to the invention, but preferably vacuum plates having a size fitting into the tool holders 2 of common machines where these types of vacuum plates are applicable are most desired.
- The air ducts 8, the venturis 9, the
silencers 12 and theoutlets 13 may be machined into thebottom plate 15 of thevacuum plate 1. - Turning to
figure 2 thebottom plate 15 is separated from the top plate by a dashedline 16 in this example such that the top plate is very thin and thebottom plate 15 is relatively thick, but other divisions may also be feasible. Alternatively, thetop plate 3 may be provided with a bottom plate and an intermediate plate corresponding to theplate 15 wherein the air ducts are integrated. A further alternative may include a construction where the air ducts are in the shape of pipes such that the top plate and the bottom plate create a box shape together with a side member .
Claims (9)
- Vacuum plate for releasably fastening items to be worked on to a surface of said plate (1), wherein said plate (1) comprises a coupling (7) for allowing a source of pressurised air to be connected to the vacuum plate (1) and a box structure having a bottom plate (15), four sides and a top plate (3), wherein the top plate (3) is provided with a plurality of apertures (5; 5'), each aperture (5; 5') connected to the coupling (7), and wherein the volume enclosed by the box structure comprisesa) for each aperture (5) a separate air duct (8) passing under the aperture (5) and connecting the coupling (7) to that particular aperture (5), orb) a limited number of air ducts (8) connecting a plurality of apertures (5') to the coupling (7),and wherein all air ducts (8) are connected to the source of pressurised air, such that an airflow may be created past the aperture (5; 5'), and wherein upstream in relation to the aperture (5; 5') in each air duct (8) a venturi (9) is arranged, and downstream from said aperture (5; 5') an air outlet (13) is provided, and wherein further the aperture (5; 5') is in communication with the air duct (8), between the venturi (9) and the outlet (13).
- Vacuum plate according to claim 1 wherein a silencer (12) is provided in the air duct (8) downstream of the aperture (5; 5') and upstream of the outlet (13).
- Vacuum plate according to claim 1 or 2 wherein one common silencer (12) is provided downstream of the apertures (5; 5') and connected to all air ducts (8), and where one common outlet (13) is connected to the silencer (12).
- Vacuum plate according to any preceding claim wherein the air pressure of the source of pressurized air is in the range of 4 bars to 12 bars, more preferred 6 bars to 8 bars, and wherein 20 to 80 litres air per minute are supplied, more preferred 30 to 60 litres per minute, and most preferred 40 to 50 litres per minute.
- Vacuum plate according to any preceding claim wherein the air ducts (8) are integral with the bottom plate (15) or the top plate (3), and the vacuum plate (1) is 500 mm by 1000 mm, more preferred 600 mm by 400 mm and between 20 mm to 60 mm thick.
- Vacuum plate according to any preceding claim wherein between 2 and 10 apertures (5; 5'), more preferred 4 and 8 apertures (5; 5'), are provided in the top plate (3).
- Vacuum plate according to claim 1 wherein a seal (4) is placed surrounding the aperture (5; 5') at a distance and in contact with the top plate (3), in order to delimit an area, when an item to be worked is placed on the top plate (3), such that between the item, the top plate (3) and the seal (4) a vacuum volume is delimited.
- Vacuum plate according to claim 7 wherein the seal (4) is made from one of the following materials: silicone, polyurethane, rubber, modified rubber, modified polymer.
- Vacuum plate according to any preceding claim wherein the top plate (3) is provided with a relief pattern such that the debris, shavings and the like will be lodged in the lower part of the relief pattern whereby the item to be worked on touches the uppermost parts of the relief pattern in order to achieve a stable support.
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DKPA200700512 | 2007-04-02 | ||
PCT/DK2008/000126 WO2008119355A1 (en) | 2007-04-02 | 2008-04-01 | Vacuum plate |
Publications (2)
Publication Number | Publication Date |
---|---|
EP2132004A1 EP2132004A1 (en) | 2009-12-16 |
EP2132004B1 true EP2132004B1 (en) | 2019-08-14 |
Family
ID=39577684
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP08715603.0A Active EP2132004B1 (en) | 2007-04-02 | 2008-04-01 | Vacuum plate |
Country Status (3)
Country | Link |
---|---|
EP (1) | EP2132004B1 (en) |
ES (1) | ES2754574T3 (en) |
WO (1) | WO2008119355A1 (en) |
Families Citing this family (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
EP2182549B1 (en) | 2008-11-03 | 2015-02-25 | Eurotron B.V. | Mobile table and lamination system comprising such table |
Family Cites Families (6)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE2848684C3 (en) * | 1978-11-09 | 1981-07-09 | Censor Patent- und Versuchs-Anstalt, 9490 Vaduz | Vacuum workpiece holder |
US5807034A (en) * | 1996-07-19 | 1998-09-15 | Mcdonnell Douglas Corporation | Vacuum drill plate |
DE10124315C1 (en) | 2001-05-17 | 2002-07-11 | Klessmann Ima Gmbh Holzbearbei | Vacuum workpiece clamping system, for stationary machine tools, has an injector jet operated by compressed air at each suction clamp with a vacuum switch to monitor the underpressure level |
DE10151635B4 (en) * | 2001-10-17 | 2007-12-06 | J. Schmalz Gmbh | Vacuum holder |
US7665717B2 (en) | 2003-07-11 | 2010-02-23 | Martin John Lenzini | Vacuum hold-down |
US7540309B2 (en) * | 2005-07-11 | 2009-06-02 | Delaware Capital Formation, Inc. | Auto-release vacuum device |
-
2008
- 2008-04-01 ES ES08715603T patent/ES2754574T3/en active Active
- 2008-04-01 WO PCT/DK2008/000126 patent/WO2008119355A1/en active Application Filing
- 2008-04-01 EP EP08715603.0A patent/EP2132004B1/en active Active
Non-Patent Citations (1)
Title |
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None * |
Also Published As
Publication number | Publication date |
---|---|
WO2008119355A1 (en) | 2008-10-09 |
ES2754574T3 (en) | 2020-04-20 |
EP2132004A1 (en) | 2009-12-16 |
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