DK201700302A1 - Linear actuator and cabinet - Google Patents

Linear actuator and cabinet Download PDF

Info

Publication number
DK201700302A1
DK201700302A1 DKPA201700302A DKPA201700302A DK201700302A1 DK 201700302 A1 DK201700302 A1 DK 201700302A1 DK PA201700302 A DKPA201700302 A DK PA201700302A DK PA201700302 A DKPA201700302 A DK PA201700302A DK 201700302 A1 DK201700302 A1 DK 201700302A1
Authority
DK
Denmark
Prior art keywords
spindle
linear actuator
axis
actuator according
teeth
Prior art date
Application number
DKPA201700302A
Other languages
Danish (da)
Inventor
Brønd Anders
Hanquist Lorenzen Stefan
Original Assignee
Linak 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 Linak A/S filed Critical Linak A/S
Priority to DKPA201700302A priority Critical patent/DK201700302A1/en
Priority to PCT/DK2018/000013 priority patent/WO2018210384A1/en
Publication of DK201700302A1 publication Critical patent/DK201700302A1/en

Links

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
    • F16H—GEARING
    • F16H25/00—Gearings comprising primarily only cams, cam-followers and screw-and-nut mechanisms
    • F16H25/18—Gearings comprising primarily only cams, cam-followers and screw-and-nut mechanisms for conveying or interconverting oscillating or reciprocating motions
    • F16H25/20—Screw mechanisms
    • F16H25/24—Elements essential to such mechanisms, e.g. screws, nuts
    • 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
    • F16H—GEARING
    • F16H25/00—Gearings comprising primarily only cams, cam-followers and screw-and-nut mechanisms
    • F16H25/18—Gearings comprising primarily only cams, cam-followers and screw-and-nut mechanisms for conveying or interconverting oscillating or reciprocating motions
    • F16H25/20—Screw mechanisms
    • 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
    • A47B51/00—Cabinets with means for moving compartments up and down
    • 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
    • F16H—GEARING
    • F16H25/00—Gearings comprising primarily only cams, cam-followers and screw-and-nut mechanisms
    • F16H25/18—Gearings comprising primarily only cams, cam-followers and screw-and-nut mechanisms for conveying or interconverting oscillating or reciprocating motions
    • F16H25/20—Screw mechanisms
    • F16H25/2025—Screw mechanisms with means to disengage the nut or screw from their counterpart; Means for connecting screw and nut for stopping reciprocating movement
    • 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
    • F16D—COUPLINGS FOR TRANSMITTING ROTATION; CLUTCHES; BRAKES
    • F16D11/00—Clutches in which the members have interengaging parts
    • F16D11/14—Clutches in which the members have interengaging parts with clutching members movable only axially
    • 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
    • F16H—GEARING
    • F16H25/00—Gearings comprising primarily only cams, cam-followers and screw-and-nut mechanisms
    • F16H25/18—Gearings comprising primarily only cams, cam-followers and screw-and-nut mechanisms for conveying or interconverting oscillating or reciprocating motions
    • F16H25/20—Screw mechanisms
    • F16H2025/2037—Actuator supports or means for fixing piston end, e.g. flanges

Landscapes

  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Transmission Devices (AREA)

Abstract

A linear actuator is described comprising a spindle (6) connected to drive means, rotatable about an axis, and in threaded engagement with a spindle nut arrangement (8) which is connected to a driven element (7). Such a linear actuator (5) should have a simple squeeze protection. To this end the spindle nut arrangement (8) comprises a first part (9) and a second part (10), the first part (9) being in engagement with the spindle (6) and the second part (10) being connected to the driven element (7), wherein the first part (9) and the second part (10) are movable relatively to each other in a direction parallel to the axis between a driving position in which the second part (10) prevents rotation of the first part (9) and a squeeze protection position in which the first part (9) is released from the second part (10).

Description

(19) DANMARK (1°) DK 2017 00302 A1
Figure DK201700302A1_D0001
(12)
PATENTANSØGNING
Patent- og Varemærkestyrelsen
Int.CI.: F16H 25/20 (2006.01)
Ansøgningsnummer: PA 2017 00302
Indleveringsdato: 2017-05-15
Løbedag: 2017-05-15
Aim. tilgængelig: 2018-11-16
Publiceringsdato: 2018-11-23
Ansøger:
Linak A/S, Smedevænget 8 Guderup, 6430 Nordborg, Danmark
Opfinder:
Anders Brønd, Sjellerupvej 28, 6430 Nordborg, Danmark
Stefan Hanquist Lorenzen, Åløkke 1c, 6372 Bylderup-Bov, Danmark
Fuldmægtig:
LINAK A/S Patent Department, P.O. Box 238,9100 Aalborg, Danmark
Titel: Linear actuator and cabinet
Fremdragne publikationer:
WO 2011/072686 A1
WO 2006/024346 A1
US 2014/0202271 A1
EP 2891826 A2
WO 2017/037088 A1
Sammendrag:
A linear actuator is described comprising a spindle (6) connected to drive means, rotatable about an axis, and in threaded engagement with a spindle nut arrangement (8) which is connected to a driven element (7). Such a linear actuator (5) should have a simple squeeze protection. To this end the spindle nut arrangement (8) comprises a first part (9) and a second part (10), the first part (9) being in engagement with the spindle (6) and the second part (10) being connected to the driven element (7), wherein the first part (9) and the second part (10) are movable relatively to each other in a direction parallel to the axis between a driving position in which the second part (10) prevents rotation of the first part (9) and a squeeze protection position in which the first part (9) is released from the second part (10).
Fortsættes...
DK 2017 00302 A1
Figure DK201700302A1_D0002
Figure DK201700302A1_D0003
Fis 3
DK 2017 00302 A1
Linear actuator and cabinet
The present invention relates to a linear actuator comprising a spindle connected to drive means, rotatable about an axis, and in threaded engagement with a spindle nut arrangement which is connected to a driven element.
Furthermore, the invention relates to a cabinet comprising a fixed section and a vertically moveable section at its back side.
In the following, a cabinet with a vertically moveable section at its back side is used as an example for an application of the linear actuator.
When, for example, a cabinet is mounted on a wall at a given height, it can be difficult to reach goods stored at the topmost shelves in the back of the cabinet. Therefore, in many cases this part of the cabinet is not used for storing goods. It is therefore advantageous to use this space for a separate part or section of the cabinet which is moveable downwards at the back side. In this case the cabinet itself has a smaller depth, i.e. the space within the cabinet is smaller in a direction perpendicular to the wall on which the cabinet is mounted. The remaining space is used to accommodate the moveable part. When the moveable part is in the lowered position, it is open and goods can be stored in this part. Thereafter, the moveable part can again be moved upwards into an upper position where it is closed again.
The moveable section of the cabinet is moved using a linear actuator. The linear actuator comprises a spindle which is rotated by drive means. The spindle nut arrangement is threaded on the spindle and connected in a non-rotatable manner to the moveable section of the cabinet. When the spindle is rotated, the spindle nut arrangement is moved upwards and downwards, depending on the direction of rotation of the spindle.
DK 2017 00302 A1
-2However, as items can be positioned in the moving path of the moveable part of the cabinet there is a risk of the moveable section hitting an item during its movement in the downwards direction, with the resulting risk that the cabinet or the item is damaged. It is an even greater concern that a person’s fingers are squeezed between the cabinet and the item.
It is an object of the invention to provide a linear actuator with a simple squeeze protection.
This object is solved with a linear actuator comprising a spindle, drive means for driving the spindle rotatable about an axis, a spindle nut arrangement in threaded engagement with the spindle and a driven element connected to the spindle nut arrangement, and the linear actuator further comprises a spindle nut arrangement comprising a first part and a second part, the first part being in engagement with the spindle and the second part being connected to the driven element, wherein the first part and the second part are moveable relative to each other in a direction parallel to the axis between a driving position in which the second part prevents rotation of the first part and a squeeze protection position in which the first part is released from the second part.
In the driving position the first part and the second part are connected in rotational interlocking manner. This means that rotation of the spindle causes a movement of the spindle nut arrangement parallel to the axis, and thereby also movement of the driven element. When, however, the driven element, for example, the moveable section of the cabinet, touches an obstacle, the first part of the spindle nut arrangement upon rotation of the spindle moves further while the second part of the spindle nut arrangement does not. The result is that the rotational interlocking
DK 2017 00302 A1
-3connection between the first part and the second part is released and the first part can rotate together with the spindle without generating a driving force. As soon as the obstacle is removed the second part is moved downwardly by gravity and the rotational interlocking connection between the first part and the second part is established again. Rotation of the spindle now again causes a movement of the spindle nut arrangement and thereby the driven element. Such a squeeze protection does not require any sensor. It operates exclusively mechanically. By adding the spindle nut arrangement to the linear actuator a simple and compact solution is obtained.
In an embodiment of the invention in the driving position the first part and the second part are in form-fit engagement. The form-fit engagement is stable enough to transmit the necessary forces or torques, in particular when moving the driven part against gravity.
In an embodiment of the invention the first part and the second part of the spindle nut arrangement comprises a teeth and groove arrangement having teeth and grooves adapted to receive the teeth. When the teeth arrangement is moved out of the groove arrangement there is no rotational interlocking connection between the first part and the second part. When the teeth arrangement has been inserted into the groove arrangement, the rotational interlocking connection is established.
In an embodiment of the invention at least one of the teeth arrangement and the groove arrangement comprises curved walls. The curved walls facilitate the separation of the first part and the second part when the driven part is stopped by an obstacle.
DK 2017 00302 A1
-4In an embodiment of the invention in a circumferential direction around the axis the teeth have a first width and the grooves have a second width, wherein the first width is smaller than the second width. This as well facilitates the separation of the first part and the second part when the driven element comes into contact with an obstacle.
In an embodiment of the invention at least one of the teeth and the grooves comprise a length in a direction parallel to the axis which is at most equal to a quarter of a thread pitch of the thread of the spindle. In other words, when the movement of the second part of the spindle nut arrangement has been stopped and the spindle has been rotated by 90° or less the rotational interlocking connection between the first part and the second part of the spindle nut arrangement is released and is thereby in the squeeze protection position. In a preferred embodiment the rotational interlocking connection is released after stopping of the second part when the spindle has been rotated by 40° or by 50°.
In an embodiment of the invention the second part forms a housing accommodating the first part. Such a construction facilitates mounting of the linear actuator.
In an embodiment of the invention the housing of the second part of the spindle nut arrangement limits the movement of the first part of the spindle nut arrangement parallel to the axis of the spindle in the squeeze protection position, where the first part is released from the second part.
In an embodiment of the invention in a circumferential direction around the axis the housing of the second part comprises only one mounting opening which is large enough for the first part to pass through. For mounting it is possible to position the second part so that the mounting opening is
DK 2017 00302 A1
-5directed upwardly. The first part can then be inserted into the mounting opening and cannot fall out of the housing of the second part since there is no further opening which is large enough to allow the first part to pass through.
In an embodiment of the invention in a circumferential direction of the axis the housing comprises an opening for each groove. In this way, the second part can be formed (for example) by injection molding wherein the mold can have a simple form.
In an embodiment of the invention the second part of the spindle nut arrangement comprises an outer contour in form of a polygon surrounding the axis. The polygon form can cover the total height of the second part,
i.e. the polygon form can extend parallel to the axis over the entire second part. It is, however, also possible that the polygon form is present only over a part of the height of the second part. The polygon form is a simple way to achieve an unrotatable connection between the second part and the driven element.
In an embodiment of the invention the first part comprises at least one flat surface between two teeth. This saves material. Furthermore, the flat surface allows gripping of the first part with automatic tools.
The invention furthermore comprises a cabinet as described at the outset. A vertically moveable section of the cabinet is connected to a linear actuator as described above.
An embodiment of the invention will now be described in more detail with reference to a drawing, wherein:
DK 2017 00302 A1
-6Fig. 1 shows a front perceptive of a cabinet,
Fig. 2 shows a perspective of the cabinet from the rear,
Fig. 3 shows a side view of a spindle nut arrangement,
Fig. 4 shows a perspective view of the spindle nut arrangement in a driving position,
Fig. 5 shows a perspective view of the spindle nut arrangement in a squeeze protection position and
Fig. 6 shows a perspective view of the first part of the spindle nut arrangement.
Fig. 1 schematically shows a cabinet 1 comprising a fixed section 2 and a vertically moveable section 3. The vertically moveable section 3 is positioned at a back side 4 of the cabinet. A rear wall of the fixed section 2 of the cabinet 1 has been removed in order to show parts of a linear actuator 5 which is used to drive the moveable section 3 up and down. In the position shown in Fig. 1 the moveable section 3 is in its lowermost position. In Fig. 2 the moveable section 3 of the schematically shown cabinet 1 is in its uppermost position.
The linear actuator 5 comprises a spindle 6 which is used to drive a driven element 7. In the present case the driven element 7 is a tube having a square or rectangular section. The spindle 6 itself is rotated by means of drive means 26, for example, by means of an electric motor. If necessary a gear or transmission can be arranged between the electric motor and the spindle 6.
DK 2017 00302 A1
-7A spindle nut arrangement 8 is mounted in the driven element 7.
The spindle nut arrangement 8 comprises a first part 9 and a second part
10. The first part 9 (Fig. 6) is a spindle nut, which comprises a throughgoing bore 11 having an inner thread 12. The inner thread 12 is threaded on an outer thread of the spindle 6. When the spindle 6 is rotated and the first part 9 is fixed against rotation, the first part 9 is moved in a direction parallel to the axis of the spindle 6, wherein the direction of movement depends on the direction of rotation of the spindle 6.
As can be seen in Fig. 6, the first part 9 comprises a teeth arrangement having four teeth 13 which are evenly distributed in circumferential direction. A flat surface 14 is arranged between two teeth 13. In the present embodiment, four flat surfaces 14 are present, i.e. a flat surface between each pair of teeth 13.
Further, the first part 9 comprises a circumferential surface 15 in form of a circular cylinder.
The second part 10 (cf. Fig. 4 and 5) is a spindle nut housing having side walls 16, 17 and a rear wall 18. A large mounting opening 19 is provided at the front side of the second part 10. This mounting opening 19 is large enough for the first part 9 to pass through so that the first part 9 can be inserted into a hollow 20 of the second part 10.
The second part 10 comprises a groove arrangement having four grooves 21. In any case, the number of grooves 21 of the groove arrangement may correspond to the number of teeth 13 of the teeth arrangement of the first part 9.
DK 2017 00302 A1
-8As can be seen in Fig. 2, in circumferential direction the teeth 13 have a first width and the grooves 21 have a second width, wherein the first width is smaller than the second width.
Furthermore, the teeth 13 comprise curved walls 22 and the grooves 21 comprise curved walls 23. The teeth 13 and the grooves 21 comprise a length in a direction parallel to the axis of the spindle 6 which is at most equal to a quarter of a thread pitch of the thread 12 of the spindle 6. Preferably, the height is smaller and corresponds to 40° to 50° of the rotation of the spindle 6.
In the position shown in Fig. 3 and 4, (the driving position), the teeth 13 have entered the grooves 21 so that a rotational interlocking connection between the first part 9 and the second part 10 is established. The second part 10 is fixed against rotation by means of the driven element 7. When therefore the spindle 6 is rotated the first part 9 is moved up or down depending on the direction of rotation of the spindle 6. The second part 10 is held in contact with first part 9 by means of gravity. Alternatively or additionally a weak spring could be used. When the spindle 6 is rotated, the moveable part 3 of the cabinet 1 is moved up or down depending on the direction of rotation.
When during such a movement the moveable part 3 of the cabinet 1 touches an obstacle, it is stopped. However, the rotation of spindle 6 can continue. Such a rotation causes a further downward movement of the first part 9 so that the teeth 13 are moved out of the grooves 21. Since the height, i.e. the length in a direction parallel to the axis, of the teeth 13 and of the grooves 21 is limited, as outlined above, the teeth 13 are released from the grooves 21 after a quarter of a rotation of the spindle 6.
DK 2017 00302 A1
-9When the teeth 13 are free from the grooves 21, the first part 9 can rotate freely in the second part 10. Consequently, no driving force is transmitted to the driven element 7 and the risk of squeezing something between the moveable section 3 of the cabinet 1 and an obstacle is avoided or at least minimized.
When the obstacle is removed, the moveable section 3 of the cabinet 1 moves downwardly under the effect of gravity or any other force, like a spring-force, and the teeth 13 will again reach into the grooves 21 so that the first part 9 is held against rotation by the second part 10. Further rotation of the spindle 6 causes a movement of the moveable section 3 of the cabinet 1 as previously described.
Each of the walls 16, 17, 18 comprises an opening 24. The opening 24 is related to the corresponding groove 21 .When the second part 10 is formed by injection molding (for example), a mounting tool can be passed through the opening 24.
It is possible to make the width of the opening 19 a little bit smaller than the diameter of the cylindrical wall 15 of the first part 9. The hollow 20 comprises a width enlargement 25 which enlargement 25 is wide enough to accommodate the cylindrical part 15 so that the first part 9 can be pressed into the second part 10.
Fig. 5 shows a second position of the first part 9 relative to the second part 10, i.e. the squeeze protection position. It can be seen that the teeth 13 have been released from engagement with the grooves 21.
DK 2017 00302 A1

Claims (2)

Claims
1/6
Figure DK201700302A1_C0001
3Z
DK 2017 00302 A1
1. Linear actuator (5) comprising a spindle (6), drive means for driving the spindle (6), rotatable about an axis, a spindle nut arrangement (8) in threaded engagement with the spindle (6), and a driven element (7) connected to the spindle nut arrangement (8), characterized in that the spindle nut arrangement (8) comprises a first part (9) and a second part (10), the first part (9) being in engagement with the spindle (6) and the second part (10) being connected to the driven element (7), wherein the first part (9) and the second part (10) are movable relatively to each other in a direction parallel to the axis of the spindle (6) between a driving position in which the second part (10) prevents rotation of the first part (9) and a squeeze protection position in which the first part (9) is released from the second part (10).
2. Linear actuator according to claim 1, characterized in that in the driving position the first part (9) and the second part (10) are in formfit engagement.
3. Linear actuator according to claim 1 or 2, characterized in that the first part (9) and the second part (10) of the spindle nut arrangement (8) comprises a teeth and groove arrangement.
4. Linear actuator according to claim 3, characterized in that the teeth arrangement and the groove arrangement comprises curved walls (22, 23).
DK 2017 00302 A1
5. Linear actuator according to claim 3 or 4, characterized in that in a circumferential direction around the axis the teeth (13) have a first width and the grooves (21) have a second width, wherein the first width is smaller than the second width.
6. Linear actuator according to any of claims 3 to 5, characterized in that at least one of the teeth (13) and the grooves (21) comprise a length in a direction parallel to the axis which is at most equal to a quarter of a thread pitch of the thread of the spindle (6).
7. Linear actuator according to any of claims 1 to 6, characterized in that the second part (10) forms a housing accommodating the first part (9).
8. Linear actuator according to claim 7, characterized in that the housing of the second part (10) limits the movement of the first part (9) parallel to the axis of the spindle in the squeeze protection position, where the first part is released from the second part (10).
9. Linear actuator according to claim 7, characterized in that in a circumferential direction around the axis the housing of the second part (10) comprises only one mounting opening (19) which is large enough for the first part (9) to pass through.
10. Linear actuator according to claim 9, characterized in that in a circumferential direction around the axis the housing comprises an opening (19, 24) for each groove (21).
11. Linear actuator according to any of claims 1 to 10, characterized in that the second part (10) comprises an outer contour in form of a polygon surrounding the axis.
DK 2017 00302 A1
12. Linear actuator according to any of claims 1 to 11, characterized in that the first part (9) comprises at least one flat (14) surface between two teeth (13).
5 13. Cabinet (1) comprising a fixed section (2) and a vertically movable section (3) at its back side (4), characterized in that the vertically movable section (3) is connected to a linear actuator (5) according to any of claims 1 to 12.
DK 2017 00302 A1
2/6
Figure DK201700302A1_C0002
DKPA201700302A 2017-05-15 2017-05-15 Linear actuator and cabinet DK201700302A1 (en)

Priority Applications (2)

Application Number Priority Date Filing Date Title
DKPA201700302A DK201700302A1 (en) 2017-05-15 2017-05-15 Linear actuator and cabinet
PCT/DK2018/000013 WO2018210384A1 (en) 2017-05-15 2018-05-15 Linear actuator and cabinet

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DKPA201700302A DK201700302A1 (en) 2017-05-15 2017-05-15 Linear actuator and cabinet

Publications (1)

Publication Number Publication Date
DK201700302A1 true DK201700302A1 (en) 2018-11-23

Family

ID=62630879

Family Applications (1)

Application Number Title Priority Date Filing Date
DKPA201700302A DK201700302A1 (en) 2017-05-15 2017-05-15 Linear actuator and cabinet

Country Status (2)

Country Link
DK (1) DK201700302A1 (en)
WO (1) WO2018210384A1 (en)

Family Cites Families (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2009146709A2 (en) * 2008-06-06 2009-12-10 Linak A/S Adjustable article of furniture
SE539553C2 (en) * 2015-09-01 2017-10-10 Nobia Ab Safety clutch connected to a pull down unit for a cabinet

Also Published As

Publication number Publication date
WO2018210384A1 (en) 2018-11-22

Similar Documents

Publication Publication Date Title
CA3002727C (en) Assembly for moving a door of a piece of furniture
DK2641502T3 (en) Linear actuator and height adjustable desk
UA101498C2 (en) Medication delivery device
US8794086B2 (en) Linear actuator and safety mechanism for the same
EP3936731A2 (en) Barrel for a barrel joint for parts of furniture and furnishing items
DK201700302A1 (en) Linear actuator and cabinet
DE202009014890U1 (en) Screw-receptive receiving device for a screwdriver
JP6976435B2 (en) Furniture fittings
RU2017134649A (en) LOCK HOUSING
RU2413444C2 (en) Adjuster
KR101084559B1 (en) Table Lift
CN210566085U (en) Screw-nut pair, safety transmission device and lifting mechanism
US11719314B2 (en) Nut structure for electric pushing rod
CN210848662U (en) Tapping machine for machining
KR102198389B1 (en) Electric driver
CN105883176B (en) A kind of packing box set of automatic open close
CN110067832B (en) Pre-tightening device for piezoelectric ceramic driver
EP3344092A1 (en) Safety clutch connected to a pull down unit for a cabinet
KR20140009668A (en) Refrigerator
JP6132612B2 (en) Electric motor device, wiper drive electric motor device
JP6986931B2 (en) Vehicle door switchgear
EP4041232B1 (en) Apparatus for opening and closing of two-part material containers, preferably capsules
JP2017001173A (en) Ratchet wrench
EP2769698B1 (en) Dental appliance for machining a dental work piece
JP6987771B2 (en) Leading thread valve

Legal Events

Date Code Title Description
PAT Application published

Effective date: 20181116

PHB Application deemed withdrawn due to non-payment or other reasons

Effective date: 20180914