WO2015192851A1 - Levelling device with sleeve and limited spindle thread length and use - Google Patents

Levelling device with sleeve and limited spindle thread length and use Download PDF

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Publication number
WO2015192851A1
WO2015192851A1 PCT/DK2015/050143 DK2015050143W WO2015192851A1 WO 2015192851 A1 WO2015192851 A1 WO 2015192851A1 DK 2015050143 W DK2015050143 W DK 2015050143W WO 2015192851 A1 WO2015192851 A1 WO 2015192851A1
Authority
WO
WIPO (PCT)
Prior art keywords
sleeve
spindle
thread
end surface
levelling device
Prior art date
Application number
PCT/DK2015/050143
Other languages
French (fr)
Inventor
Tomas Hecht OLSEN
Original Assignee
Ngi A/S
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Ngi A/S filed Critical Ngi A/S
Publication of WO2015192851A1 publication Critical patent/WO2015192851A1/en

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Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16M—FRAMES, CASINGS OR BEDS OF ENGINES, MACHINES OR APPARATUS, NOT SPECIFIC TO ENGINES, MACHINES OR APPARATUS PROVIDED FOR ELSEWHERE; STANDS; SUPPORTS
    • F16M7/00—Details of attaching or adjusting engine beds, frames, or supporting-legs on foundation or base; Attaching non-moving engine parts, e.g. cylinder blocks
    • A—HUMAN NECESSITIES
    • A47—FURNITURE; DOMESTIC ARTICLES OR APPLIANCES; COFFEE MILLS; SPICE MILLS; SUCTION CLEANERS IN GENERAL
    • A47B—TABLES; DESKS; OFFICE FURNITURE; CABINETS; DRAWERS; GENERAL DETAILS OF FURNITURE
    • A47B91/00—Feet for furniture in general
    • A47B91/02—Adjustable feet
    • A47B91/022—Adjustable feet using screw means
    • A47B91/024—Foot attached to a rotating bolt supported in an internal thread

Definitions

  • the invention relates to a levelling device for levelling and support of items, such as machines, which levelling device includes a top part for fastening in an item such as a machine and a lower part for contact against a base such as a floor and where there in the top part is included a spindle, which includes a thread, a lower end surface at the lower part and a center axis and a sleeve, which includes a lower end surface closest to the lower part, an upper end surface in the opposite end of the sleeve.
  • the invention relates to the use of the levelling device.
  • Sleeve in this connection technically describes a thread shielding.
  • the sleeve is mounted from above, since the sleeve is typically mounted subsequently to the top part being connected with the lower part.
  • the sleeve could also be mounted from below if it occurs before the top part is connected with the lower part and if the spindle is designed for it.
  • the thread on the spindle must be covered with a shielding, since cleaning a thread with small edges and sharp corners is very difficult. It is
  • the thread on the spindle is shielded in connection with achieving authority approvals of the levelling device, including USDA, EHEDG and 3A approvals.
  • This sleeve seals with a lower sealing item lowermost towards the spindle below the spindle's thread and uppermost with an upper sealing item towards the underside of an item, such as a machine, which is to be supported by the levelling device, such that there can not get filth and bacteria into the thread on the spindle.
  • DE102007057382 describes a levelling device of the in the introduction stated. It thus includes a sleeve for shielding a spindle. The sleeve is however not constructed such that a shielding of the spindle is always ensured.
  • a levelling device of the in the introduction to claim 1 stated type which is characterized in that the levelling device includes an external cylindrical surface between the thread and the lower end surface and an internal thread in an area at the upper end surface, designed to go in mesh with the thread on the spindle and that the distance from the sleeve's upper end surface to the sleeve's lower end surface is larger than the length of the spindle's thread.
  • the levelling device which with its other construction details can be used in locations with high requirements for hygiene, can thus in the future also be approved by USDA, 3A and EHEDG if it is implemented as requirement at the respective authorities that the spindle's thread can not be exposed by screwing the sleeve too high up.
  • a levelling device should in this context be understood an adjustable construction element including an adjustable machine foot for supporting machines.
  • the levelling device can also include an adjustable leg, which supports a machine.
  • the adjustment of the device entails that the, on the device resting machine, can be adjusted level or in a desired angle depending on the conditions.
  • the levelling device includes that the top part includes a lower sealing item designed to go in mesh with a track on the sleeve in an area at the sleeve's lower end surface, which lower sealing item is designed to form contact with the cylindrical surface on the spindle and is limited in the center axis' direction by an upper sealing plane and a lower sealing plane on the sleeve.
  • the levelling device includes that the lower sealing item is an O-ring.
  • the lower sealing item can be provided with a standard component.
  • the levelling device includes that the lower sealing item is manufactured in a polymeric material.
  • the levelling device includes that there on the lower part of the cylindrical surface on the spindle are two tracks, which include a first screw wrench surface and another screw wrench surface placed symmetrically around the center axis, designed to form contact with a screw wrench, which two tracks are limited in the center axis' direction by an upper screw wrench plane and a lower screw wrench plane, which lower screw wrench plane is placed closer to the lower end surface on the spindle than the upper screw wrench plane. It is hereby achieved that the spindle can be turned or held fixed with a screw wrench.
  • the levelling device includes that the internal thread in the sleeve is limited in direction towards the sleeve's first end surface by a lower limitation, which lower limitation is provided by transition between the sleeve's thread and a mostly smooth inner surface. It is hereby achieved that the sleeve's internal thread only has the necessary length.
  • the levelling device includes that the spindle's thread is limited in direction towards the spindle's lower end surface by a lower limitation, which lower limitation is provided by transition between the spindle's thread and the external cylindrical surface on the spindle.
  • the levelling device includes that the distance between the lower limitation on the sleeve's internal thread and the sleeve's lower sealing plane is shorter than the distance from the lower limitation on the spindle's thread to the upper screw wrench plane on the spindle. It is hereby achieved that the lower sealing item on the sleeve can not be led down past the two tracks in the cylindrical surface and it is thereby ensured that there does not occur a leakage if the sleeve is screwed fully to the bottom.
  • the levelling device includes that the distance from the sleeve's upper end surface to the sleeve's lower end surface, and subtracted the length of the sleeve's internal thread, is larger than the length of the spindle's thread.
  • Fig. 1 shows an assembled levelling device.
  • Fig. 2 shows an assembled top part according to the invention
  • Fig. 3 shows a cut through the top part along the line A-A shown in fig. 2
  • Fig. 4 shows an exploded top part according to the invention
  • Fig. 5 shows a cut through the top part along the line B-B shown in fig. 4
  • Fig. 6 shows an assembled levelling device where the sleeve is screwed fully up
  • Fig. 1 shows a levelling device 1 including a top part 3 and a lower part 2.
  • the top part 3 is typically fixed to a machine while the lower part 2 is the support against a base.
  • the top part 3 includes a spindle 4 and a, around the spindle 4 mounted, sleeve 6.
  • the spindle 4 is in the upper part, closest to the machine, provided with a thread 5
  • fig. 3 is a sectional view of the in fig. 2 stated along the line AA and where fig. 5 is a sectional view of the in fig. 4 stated along the line BB.
  • the spindle 4 is upwards limited by an upper end surface 26 and opposite this by a lower end surface 25. Closest to the upper end surface 26, the spindle is provided with the thread 5.
  • the spindle 4 is a rod shaped cylindrical item around which the sleeve 6 is placed.
  • the sleeve 6 is likewise a cylindrical item including an upper end surface 16 closest to the spindle's 4 upper end surface 26 and an opposite placed and limiting lower end surface 15 closest to the spindle's 4 lower end surface 25
  • the spindle's 4 thread 5 is in direction towards the lower end surface 25 on the spindle 4 limited by a lower limitation 9, which occurs by a transition between the spindle's 4 thread 5 and an external cylindrical surface 10 on the spindle 4.
  • the external cylindrical surface 10 proceeds from limitation 9 and in direction towards the lower end surface 25 on the spindle 4, where the cylindrical surface 10 in the area at the lower end surface 25 on the spindle proceeds over in a surface with a larger circumference.
  • the external cylindrical surface 10 includes a first track 1 1 and another track 12 closest to the lower end surface 25 on the spindle 4.
  • These two tracks 1 1 ,12 include two plane parallel surfaces 1 1 a, 12a, which are designed to form contact with a screw wrench and are placed
  • the tracks 1 1 ,12 are limited in direction towards the upper end surface 26 on the spindle 4 by an upper screw wrench plane 22 and in direction towards the lower end surface 25 of a lower screw wrench plane 23.
  • the two tracks 1 1 1 ,12 which include the two surfaces 1 1 a, 12a are not limited to the design shown here, but can have other designs including that they can consist of several plane surfaces.
  • fig. 2 is shown that the cylindrical spindle 4 has a center axis 24 and also in fig. 2 is with 18 indicated a line AA, which indicates the cut, which is depicted in fig. 3.
  • fig. 4 is with 19 marked a line BB, which indicates the cut, which is depicted in fig. 5.
  • the thread 7 is in direction towards the lower end surface 15 on the sleeve 6 limited by a lower limitation 8, which occurs by a transition between the sleeve's 6 thread 7 and a mostly smooth inner surface on the sleeve 6. This thread 7 is designed to go in mesh with the spindle's 4 thread 5.
  • the top part 3 furthermore includes an upper sealing item 13 and a lower sealing item 14.
  • the upper sealing item 13 is mounted on a sleeve 6 in the area at the sleeve's 6 upper end surface 16 and is designed to seal between the machine, which is to be supported and the sleeve 6 such that there can not enter filth and bacteria in to the spindle's 4 thread 5 in this area.
  • the lower sealing item 14 is mounted on the sleeve 6 in the area at the sleeve's 6 lower end surface 15 and is designed to seal between the external cylindrical surface 10 on the spindle 4 and the sleeve 6 such that there can not enter filth and bacteria in to the spindle's 4 thread 5 in this area.
  • the lower sealing item 14 will typically be an O-ring placed in the sleeve's 6 track 16, but is not limited to this and can in an alternative embodiment have other designs, including being a ring-shaped item with an elongation on each side of the lower end surface 15 on the sleeve 6, designed to seal towards the spindle's 4 cylindrical surface 10 and towards the sleeve 6, where the maximum elongation is limited in direction towards the upper end surface 16 on the sleeve by an upper sealing plane 20 and in the opposite direction of a lower sealing plane 21 .
  • the upper sealing plane 20 and the lower sealing plane 21 are placed relative in relation to the lower end surface 15 on the sleeve 6 and thereby follow the sleeve's 6 movement.
  • the upper screw wrench plane 22 on the spindle 4 has influence on the shielding function when the sleeve 6 is screwed fully down. If the lower sealing item 14 is thus led down past the upper screw wrench plane 22 and is thereby opposite the two tracks 1 1 ,12, there is risk of that there is no longer a sealed washer towards the cylindrical surface 10 on the spindle 4 and thereby that there can enter filth and bacteria in under the sleeve 6 and into the spindle's 4 thread 5.
  • the spindle 4 is not limited to the design shown here with having a larger circumference at the lower end surface 25, but can in another embodiment be designed such that the cylindrical surface 10 on the spindle is limited downwards by the lower end surface 25 on the spindle and thereby defines the largest circumference on the spindle 4 between the spindle's 4 thread 5 and the lower end surface 25.
  • the sleeve 6 can hereby be alternatively mounted from below before the top part 3 is connected to the lower part 2.
  • a levelling device 1 it is thus not possible to expose the whole or parts of the lowermost of the spindle's 4 thread 5 by a mistake, when the sleeve 6 is screwed up in order to seal against the item, which is to be supported.
  • the described levelling device 1 is used in locations with high requirements for hygiene such as locations for processing of foodstuffs or manufacturing of medicine.

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  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Closures For Containers (AREA)
  • Machine Tool Units (AREA)

Abstract

The invention includes a levelling device (1), which includes a top part (3) and a lower part (2) where there in the top part (3) is included a spindle (4), which includes a thread (5) and an external cylindrical surface. (10) and where there in the top part (3) is included a sleeve (6) with a lower sealing item (14) mounted where the sleeve (6) is longer than the spindle's (4) thread (5). With the invention it is achieved that it is possible to manufacture a levelling device (1) where the sleeve (6), as a result of the sleeve (6) being longer than the spindle's (4) thread (5), can not be screwed so high up that parts of the thread (5) on the spindle (4) are exposed.

Description

Levelling device with sleeve and limited spindle thread length and use
The invention relates to a levelling device for levelling and support of items, such as machines, which levelling device includes a top part for fastening in an item such as a machine and a lower part for contact against a base such as a floor and where there in the top part is included a spindle, which includes a thread, a lower end surface at the lower part and a center axis and a sleeve, which includes a lower end surface closest to the lower part, an upper end surface in the opposite end of the sleeve.
Furthermore, the invention relates to the use of the levelling device.
On existing levelling devices for use in locations with high requirements for hygiene, is today typically used a sleeve, which is mounted from above around the spindle to shield the thread on the spindle.
Sleeve in this connection technically describes a thread shielding.
The sleeve is mounted from above, since the sleeve is typically mounted subsequently to the top part being connected with the lower part.
The sleeve could also be mounted from below if it occurs before the top part is connected with the lower part and if the spindle is designed for it. The thread on the spindle must be covered with a shielding, since cleaning a thread with small edges and sharp corners is very difficult. It is
furthermore a requirement that the thread on the spindle is shielded in connection with achieving authority approvals of the levelling device, including USDA, EHEDG and 3A approvals.
This sleeve seals with a lower sealing item lowermost towards the spindle below the spindle's thread and uppermost with an upper sealing item towards the underside of an item, such as a machine, which is to be supported by the levelling device, such that there can not get filth and bacteria into the thread on the spindle.
It will be described in a mounting instruction that one must now screw the sleeve so high up that the lowermost part of the thread on the spindle becomes visible.
There are, however, certain drawbacks of the known technology, including that it is' possible to screw the sleeve so far up that the lowermost sealing item is led with the sleeve up over the thread on the spindle and the thread on the spindle is hereby partially exposed and filth and bacteria can enter into the thread and also up under the sleeve, since the lowermost sealing item can not seal against the thread itself on the spindle. This occurs despite of it being described in the mounting instruction that the sleeve must not be screwed so high up.
Furthermore, it is expected that the authority approvals of the levelling device, including at USDA, will require that neither the whole thread nor parts of the thread on the spindle can be exposed by a potential faulty use. DE102007057382 describes a levelling device of the in the introduction stated. It thus includes a sleeve for shielding a spindle. The sleeve is however not constructed such that a shielding of the spindle is always ensured.
It is therefore an object of the invention to show a levelling device without the above mentioned drawbacks or at least provide a useful alternative.
The object of the invention is achieved by a levelling device of the in the introduction to claim 1 stated type, which is characterized in that the levelling device includes an external cylindrical surface between the thread and the lower end surface and an internal thread in an area at the upper end surface, designed to go in mesh with the thread on the spindle and that the distance from the sleeve's upper end surface to the sleeve's lower end surface is larger than the length of the spindle's thread.
In this way it thus becomes possible to manufacture a levelling device where the sleeve can not be screwed so high up that the whole, or parts of the lowermost of the spindle's thread, is exposed. It is ensured with the invention that the spindle's thread is always shielded by the sleeve as long as there is free thread in the top of the spindle for fastening in an item, which is to be supported.
The levelling device, which with its other construction details can be used in locations with high requirements for hygiene, can thus in the future also be approved by USDA, 3A and EHEDG if it is implemented as requirement at the respective authorities that the spindle's thread can not be exposed by screwing the sleeve too high up.
By adjusting the length of the spindle's thread, such that it is shorter than the length of the sleeve with the lower sealing item mounted, it is hereby ensured that the whole or parts of the thread on the spindle can not be exposed by a mistake.
By a levelling device should in this context be understood an adjustable construction element including an adjustable machine foot for supporting machines.
The levelling device can also include an adjustable leg, which supports a machine.
The adjustment of the device entails that the, on the device resting machine, can be adjusted level or in a desired angle depending on the conditions.
Further preferred embodiments of the levelling device are stated in the additional claims. By an additional aspect of the invention, the levelling device includes that the top part includes a lower sealing item designed to go in mesh with a track on the sleeve in an area at the sleeve's lower end surface, which lower sealing item is designed to form contact with the cylindrical surface on the spindle and is limited in the center axis' direction by an upper sealing plane and a lower sealing plane on the sleeve.
It is hereby achieved that there is sealed between the sleeve and the cylindrical surface on the spindle in the area at the sleeve's lower end surface, which lower sealing plane is placed closer to the lower end surface on the sleeve than the upper sealing plane. By an additional aspect of the invention, the levelling device includes that the lower sealing item is an O-ring.
It is hereby achieved that the lower sealing item can be provided with a standard component. By an additional aspect of the invention, the levelling device includes that the lower sealing item is manufactured in a polymeric material.
It is hereby achieved that there can be provided suiting sealing between spindle and sealing item and between sleeve and sealing item. By an additional aspect of the invention, the levelling device includes that there on the lower part of the cylindrical surface on the spindle are two tracks, which include a first screw wrench surface and another screw wrench surface placed symmetrically around the center axis, designed to form contact with a screw wrench, which two tracks are limited in the center axis' direction by an upper screw wrench plane and a lower screw wrench plane, which lower screw wrench plane is placed closer to the lower end surface on the spindle than the upper screw wrench plane. It is hereby achieved that the spindle can be turned or held fixed with a screw wrench.
By an additional aspect of the invention, the levelling device includes that the internal thread in the sleeve is limited in direction towards the sleeve's first end surface by a lower limitation, which lower limitation is provided by transition between the sleeve's thread and a mostly smooth inner surface. It is hereby achieved that the sleeve's internal thread only has the necessary length. By an additional aspect of the invention, the levelling device includes that the spindle's thread is limited in direction towards the spindle's lower end surface by a lower limitation, which lower limitation is provided by transition between the spindle's thread and the external cylindrical surface on the spindle.
It is hereby achieved that there can be a cylindrical surface below the limitation on the spindle, suited for sealing against. By an additional aspect of the invention, the levelling device includes that the distance between the lower limitation on the sleeve's internal thread and the sleeve's lower sealing plane is shorter than the distance from the lower limitation on the spindle's thread to the upper screw wrench plane on the spindle. It is hereby achieved that the lower sealing item on the sleeve can not be led down past the two tracks in the cylindrical surface and it is thereby ensured that there does not occur a leakage if the sleeve is screwed fully to the bottom.
By an additional aspect of the invention, the levelling device includes that the distance from the sleeve's upper end surface to the sleeve's lower end surface, and subtracted the length of the sleeve's internal thread, is larger than the length of the spindle's thread.
By measurement of the length is understood the length measured in axial direction parallel to the center axis.
As mentioned, the invention also relates to the use of the above mentioned levelling device in locations with high requirements for hygiene such as locations for processing of foodstuffs or manufacturing of medicine. The invention also relates to use of the above mentioned levelling device for support of a machine placed in areas with risk of earthquake. The invention will now be explained more fully with reference to the drawings, on which: Fig. 1 shows an assembled levelling device.
Fig. 2 shows an assembled top part according to the invention
Fig. 3 shows a cut through the top part along the line A-A shown in fig. 2
Fig. 4 shows an exploded top part according to the invention
Fig. 5 shows a cut through the top part along the line B-B shown in fig. 4 Fig. 6 shows an assembled levelling device where the sleeve is screwed fully up
Fig. 1 shows a levelling device 1 including a top part 3 and a lower part 2. The top part 3 is typically fixed to a machine while the lower part 2 is the support against a base. The top part 3 includes a spindle 4 and a, around the spindle 4 mounted, sleeve 6. The spindle 4 is in the upper part, closest to the machine, provided with a thread 5
The top part 3 will be described further with reference to fig. 2, fig. 3, fig. 4 and fig. 5, where fig. 3 is a sectional view of the in fig. 2 stated along the line AA and where fig. 5 is a sectional view of the in fig. 4 stated along the line BB.
The spindle 4 is upwards limited by an upper end surface 26 and opposite this by a lower end surface 25. Closest to the upper end surface 26, the spindle is provided with the thread 5. The spindle 4 is a rod shaped cylindrical item around which the sleeve 6 is placed. The sleeve 6 is likewise a cylindrical item including an upper end surface 16 closest to the spindle's 4 upper end surface 26 and an opposite placed and limiting lower end surface 15 closest to the spindle's 4 lower end surface 25
The spindle's 4 thread 5 is in direction towards the lower end surface 25 on the spindle 4 limited by a lower limitation 9, which occurs by a transition between the spindle's 4 thread 5 and an external cylindrical surface 10 on the spindle 4. The external cylindrical surface 10 proceeds from limitation 9 and in direction towards the lower end surface 25 on the spindle 4, where the cylindrical surface 10 in the area at the lower end surface 25 on the spindle proceeds over in a surface with a larger circumference.
The external cylindrical surface 10 includes a first track 1 1 and another track 12 closest to the lower end surface 25 on the spindle 4.
These two tracks 1 1 ,12 include two plane parallel surfaces 1 1 a, 12a, which are designed to form contact with a screw wrench and are placed
symmetrically around the spindle's 4 center axis 24.
The tracks 1 1 ,12 are limited in direction towards the upper end surface 26 on the spindle 4 by an upper screw wrench plane 22 and in direction towards the lower end surface 25 of a lower screw wrench plane 23.
The two tracks 1 1 ,12, which include the two surfaces 1 1 a, 12a are not limited to the design shown here, but can have other designs including that they can consist of several plane surfaces. In fig. 2 is shown that the cylindrical spindle 4 has a center axis 24 and also in fig. 2 is with 18 indicated a line AA, which indicates the cut, which is depicted in fig. 3.
In fig. 4 is with 19 marked a line BB, which indicates the cut, which is depicted in fig. 5. The sleeve 6, where there is shown internal details in the sectional views fig. 3 and fig. 5, includes an internal thread 7, placed in the area closest to the upper end surface 16 on the sleeve 6.
The thread 7 is in direction towards the lower end surface 15 on the sleeve 6 limited by a lower limitation 8, which occurs by a transition between the sleeve's 6 thread 7 and a mostly smooth inner surface on the sleeve 6. This thread 7 is designed to go in mesh with the spindle's 4 thread 5.
The top part 3 furthermore includes an upper sealing item 13 and a lower sealing item 14.
The upper sealing item 13 is mounted on a sleeve 6 in the area at the sleeve's 6 upper end surface 16 and is designed to seal between the machine, which is to be supported and the sleeve 6 such that there can not enter filth and bacteria in to the spindle's 4 thread 5 in this area.
The lower sealing item 14 is mounted on the sleeve 6 in the area at the sleeve's 6 lower end surface 15 and is designed to seal between the external cylindrical surface 10 on the spindle 4 and the sleeve 6 such that there can not enter filth and bacteria in to the spindle's 4 thread 5 in this area.
In the sleeve 6, there is in the area at the lower end surface 15 an internal track 17, which is designed to form contact with the lower sealing item 14, such that the lower sealing item 14 can be mounted on the sleeve and follow the sleeve's 6 movement.
The lower sealing item 14 will typically be an O-ring placed in the sleeve's 6 track 16, but is not limited to this and can in an alternative embodiment have other designs, including being a ring-shaped item with an elongation on each side of the lower end surface 15 on the sleeve 6, designed to seal towards the spindle's 4 cylindrical surface 10 and towards the sleeve 6, where the maximum elongation is limited in direction towards the upper end surface 16 on the sleeve by an upper sealing plane 20 and in the opposite direction of a lower sealing plane 21 . The upper sealing plane 20 and the lower sealing plane 21 are placed relative in relation to the lower end surface 15 on the sleeve 6 and thereby follow the sleeve's 6 movement.
According to the invention, the upper screw wrench plane 22 on the spindle 4 has influence on the shielding function when the sleeve 6 is screwed fully down. If the lower sealing item 14 is thus led down past the upper screw wrench plane 22 and is thereby opposite the two tracks 1 1 ,12, there is risk of that there is no longer a sealed washer towards the cylindrical surface 10 on the spindle 4 and thereby that there can enter filth and bacteria in under the sleeve 6 and into the spindle's 4 thread 5.
The spindle 4 is not limited to the design shown here with having a larger circumference at the lower end surface 25, but can in another embodiment be designed such that the cylindrical surface 10 on the spindle is limited downwards by the lower end surface 25 on the spindle and thereby defines the largest circumference on the spindle 4 between the spindle's 4 thread 5 and the lower end surface 25. The sleeve 6 can hereby be alternatively mounted from below before the top part 3 is connected to the lower part 2.
In fig. 6 is shown that when the sleeve 6 is screwed fully up on the spindle 4, such that there is not free thread 5 at the top of the spindle 4, then the whole spindle's 4 thread 5 is shielded by the sleeve 6.
In a levelling device 1 according to the invention, it is thus not possible to expose the whole or parts of the lowermost of the spindle's 4 thread 5 by a mistake, when the sleeve 6 is screwed up in order to seal against the item, which is to be supported. By adjusting the length of the spindle's 4 thread 5 such that it is shorter than the total length of the sleeve 6, it is ensured that the spindle's 4 thread 5 is shielded as long as there is thread 5 at the top of the spindle 4 for fixing an item, which is to be supported.
Thereby, the expected future requirements from the authorities can be met and the authority approvals, including from USDA are achieved.
It is a part of the invention that the described levelling device 1 is used in locations with high requirements for hygiene such as locations for processing of foodstuffs or manufacturing of medicine.

Claims

P A T E N T C L A I M S
1 . Levelling device (1 ) for levelling and support of items, such as machines, which levelling device (1 ) includes a top part (3) for fastening in an item such as a machine and a lower part (2) for contact against a base such as a floor and where there in the top part (3) is included a spindle (4), which includes a thread (5), a lower end surface (25) at the lower part (2) and a center axis (24) and a sleeve (6), which includes a lower end surface (15) closest to the lower part (2), an upper end surface (16) in the opposite end of the sleeve (6), characterized in that the levelling device includes an external cylindrical surface (10) between the thread (5) and the lower end surface (25) and an internal thread (7) in an area at the upper end surface (16), designed to go in mesh with the thread (5) on the spindle (4) and that the distance from the sleeve's (6) upper end surface (16) to the sleeve's (6) lower end surface (15) is larger than the length of the spindle's (4) thread (5).
2. Levelling device (1) according to claim 1 characterized in that the top part (3) includes a lower sealing item (14) designed to go in mesh with a track ( 7) on the sleeve (6) in an area at the sleeve's (6) lower end surface (15), which lower sealing item (14) is designed to form contact with the cylindrical surface (10) on the spindle (4) and is limited in the center axis' (24) direction by an upper sealing plane (20) and a lower sealing plane (21 ) on the sleeve (6), which lower sealing plane (21 ) is placed closer to the lower end surface (15) on the sleeve (6) than the upper sealing plane (20).
3. Levelling device (1 ) according to claim 2 characterized in that the lower sealing item (14) is an O-ring.
4. Levelling device (1 ) according to one or more of claims 2 to 3 characterized in that the lower sealing item (14) is made in a polymeric material.
5. Levelling device (1 ) according to one or more of claims 1 to 4
characterized in that there on the lower part of the cylindrical surface (10) on the spindle (4) are two tracks (1 1 , 12), which include a first screw wrench surface (1 1a) and another screw wrench surface (12a) placed symmetrically around the center axis (24), designed to form contact with a screw wrench, which two tracks
(1 1 ,12) are limited in the center axis' (24) direction by an upper screw wrench plane (22) and a lower screw wrench plane (23), which lower screw wrench plane (23) is placed closer to the lower end surface (25) on the spindle (4) than the upper screw wrench plane (22)
6. Levelling device (1 ) according to one or more of claims 1 to 5 characterized in that the internal thread (7) in the sleeve (6) is limited in direction towards the sleeve's (6) first end surface (15) by a lower limitation (8), which lower limitation (8) is provided by transition between the sleeve's (6) thread (7) and a mostly smooth inner surface.
7. Levelling device (1 ) according to one or more of claims 1 to 6 characterized in that the spindle's (4) thread (5) is limited in direction towards the spindle's lower end surface (25) by a lower limitation (9), which lower limitation (9) is provided by transition between the spindle's (4) thread (5) and the external cylindrical surface (10) on the spindle (4).
8. Levelling device (1 ) according to claim 6 or 7 characterized in that the distance between the lower limitation (8) on the sleeve's (6) internal thread (7) and the sleeve's (6) lower sealing plane (21 ) is shorter than the distance from the lower limitation (9) on the spindle's (4) thread (5) to the upper screw wrench plane (22) on the spindle (4)
9. Levelling device (1 ) according to any of the previous claims characterized in that the distance from the sleeve's (6) upper end surface (16) to the sleeve's (6) lower end surface (15), and subtracted the length of the sleeve's (6) internal thread (7), is larger than the length of the spindle's (4) thread (5).
10. Use of levelling device (1 ) according to one or more of claims 1 to 9 in locations with high requirements for hygiene such as locations for processing of foodstuffs or manufacturing of medicine.
1 1 . Use of a levelling device (1 ) according to one or more of claims 1 - 10 for support of a machine placed in areas with risk of earthquake.
PCT/DK2015/050143 2014-06-20 2015-06-03 Levelling device with sleeve and limited spindle thread length and use WO2015192851A1 (en)

Applications Claiming Priority (2)

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DK201400326A DK178232B1 (en) 2014-06-20 2014-06-20 Leveling unit with sleeve and limited spindle thread length and use
DKPA201400326 2014-06-20

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WO2015192851A1 true WO2015192851A1 (en) 2015-12-23

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Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20170245640A1 (en) * 2016-02-26 2017-08-31 Jenny Cheng Telescoping Adjustable Leg
KR20200059100A (en) * 2018-11-20 2020-05-28 이인환 Adjust the height adjustment tool

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DK201670138A1 (en) * 2015-12-15 2016-12-19 Ngi As Sealing ring for use in environments with special requirements for cleanability

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Publication number Priority date Publication date Assignee Title
US2940784A (en) * 1956-06-06 1960-06-14 William B Fell Precision threaded adjustment
EP0503701A1 (en) * 1991-02-26 1992-09-16 CAMAR S.p.A. Levelling device, particularly for furniture
US20050066472A1 (en) * 2003-09-30 2005-03-31 Thomas Graham Caster leg assembly with adjustment locking means
US20060091269A1 (en) * 2004-11-02 2006-05-04 Michael Hanson Furniture leg extension and leveling device and method for use
DE102007057382A1 (en) 2007-11-27 2009-06-04 Rittal Gmbh & Co. Kg leveling

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Publication number Priority date Publication date Assignee Title
FR2176623A1 (en) * 1972-03-24 1973-11-02 Saint Omer Fonderies
ITMI20072089A1 (en) * 2007-10-30 2009-04-30 Leonardo Srl PERFECTED LEVELER DEVICE.

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2940784A (en) * 1956-06-06 1960-06-14 William B Fell Precision threaded adjustment
EP0503701A1 (en) * 1991-02-26 1992-09-16 CAMAR S.p.A. Levelling device, particularly for furniture
US20050066472A1 (en) * 2003-09-30 2005-03-31 Thomas Graham Caster leg assembly with adjustment locking means
US20060091269A1 (en) * 2004-11-02 2006-05-04 Michael Hanson Furniture leg extension and leveling device and method for use
DE102007057382A1 (en) 2007-11-27 2009-06-04 Rittal Gmbh & Co. Kg leveling

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20170245640A1 (en) * 2016-02-26 2017-08-31 Jenny Cheng Telescoping Adjustable Leg
US11051617B2 (en) * 2016-02-26 2021-07-06 Component Hardware Group, Inc Telescoping adjustable leg
KR20200059100A (en) * 2018-11-20 2020-05-28 이인환 Adjust the height adjustment tool
KR102161355B1 (en) * 2018-11-20 2020-09-29 이인환 Adjust the height adjustment tool

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