CN106637554B - Spherical Yarn Brake for two-for-one twisting spindles - Google Patents

Spherical Yarn Brake for two-for-one twisting spindles Download PDF

Info

Publication number
CN106637554B
CN106637554B CN201611114138.XA CN201611114138A CN106637554B CN 106637554 B CN106637554 B CN 106637554B CN 201611114138 A CN201611114138 A CN 201611114138A CN 106637554 B CN106637554 B CN 106637554B
Authority
CN
China
Prior art keywords
yarn
face ring
brake
spring
feeding pipe
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
Application number
CN201611114138.XA
Other languages
Chinese (zh)
Other versions
CN106637554A (en
Inventor
乔治·海嫩
J·奇施斯基
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
If the cable technology & Limited by Share Ltd
Original Assignee
Saurer Germany GmbH and Co KG
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 Saurer Germany GmbH and Co KG filed Critical Saurer Germany GmbH and Co KG
Publication of CN106637554A publication Critical patent/CN106637554A/en
Application granted granted Critical
Publication of CN106637554B publication Critical patent/CN106637554B/en
Active legal-status Critical Current
Anticipated expiration legal-status Critical

Links

Classifications

    • DTEXTILES; PAPER
    • D01NATURAL OR MAN-MADE THREADS OR FIBRES; SPINNING
    • D01HSPINNING OR TWISTING
    • D01H13/00Other common constructional features, details or accessories
    • D01H13/10Tension devices
    • D01H13/104Regulating tension by devices acting on running yarn and not associated with supply or take-up devices
    • D01H13/106Regulating tension by devices acting on running yarn and not associated with supply or take-up devices for double-twist spindle

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Textile Engineering (AREA)
  • Spinning Or Twisting Of Yarns (AREA)
  • Braking Arrangements (AREA)

Abstract

The present invention relates to a kind of spherical Yarn Brake for two-for-one twisting spindles, the brake casing including tubulose is made of upper housing section and the lower case section being threaded togather with it;The yarn feeding pipe that can be mounted on to coaxial rotating in upper housing section;Corresponding to the upper braking face ring of yarn feeding pipe, its height is adjusted by rotating yarn feeding pipe;With the detent ball of braking face ring interaction;Piston guide, axially movable is sealed in lower case section, which carries lower braking face ring on the outside for the bottom that it is pointed up, and can use suction and the power of return spring is overcome axially downwardly to adjust;It is arranged in the holding meanss that detent ball is used between two braking face rings;Act on the braking force adjustment device that the brake unit that face ring and detent ball are constituted is braked by two, which is characterized in that the holding meanss for detent ball are arranged in the lower end for carrying the sleeve of upper braking face ring.

Description

Spherical Yarn Brake for two-for-one twisting spindles
Technical field
The present invention relates to a kind of spherical Yarn Brakes.
Background technique
In two-for-one twister, enter before rotary spindle to twist yarn, it is necessary to be applied certain yarn pulling force.It must fit When selection yarn pulling force, to guarantee stable twisting process within the whole service time of bobbin.The mark of required yarn tension It is quasi- are as follows: bobbin does not allow during the whole service on twisting spindle yarn storage disk lower than minimum yarn storage amount, so that air ring is kept It is stable shaped.If yarn storage amount is lower than the value, when there is small interference, (quality fluctuation in air ring has on bobbin Link) when, air ring has just had the tendency of temporary flat contracting.Air ring will be will appear at this time surprisingly to contact with ingot tank edge, it may It is impaired until broken yarn to will lead to yarn.Furthermore if plying raw yarn, in order to support yarn movement, additionally using can be rotated freely Flier, raw yarn is passed through into flier and is supplied to yarn feeding pipe and the Yarn braking that is placed in inside bobbin via guide eye Device.Flier rotates in the case, and also causes a degree of Yarn braking (pre- other than real Yarn Brake Tension), this can also be changed by additional bob-weight.
It was verified that so-called capsule brake (Kapselbremsen) is well suited as Yarn Brake.These brakings The chief component of device is the braking capsule being clamped between two braking face rings (usually two ceramic guide eyes), The braking capsule is made of top, lower part and the spring clamped therebetween, and the spring will brake capsule spherical crown towards braking Face ring squeezes.Yarn passes through between two clamping points.For common embodiment, adjust between two braking face rings Spring clamp effect can be adjusted, to the normal force of yarn application and thus to the braking action of yarn in distance.Thus usually The height of adjustable yarn feeding pipe, on the one hand for space reasons, on the other hand because yarn enters the angulation change in yarn feeding pipe, Therefore it is not intended to adjustment height.
The adjustment carries out before twisting process starts, and remains unchanged during winder.It is different in order to be directed to Yarn, material and spindle size cover in general common yarn tension range, there is of some springs with different dynamics Power capsule, or have it is some can according to required brake force replace tension force of spring capsule.This way is more troublesome, because one Aspect replacement capsule will spend the time, on the other hand need a variety of capsule types.The latter can cause operating element expense to improve, and And in the case where not identifying capsule in a manner of not confusing, then it may result in and obscure capsule.
Need to penetrate raw yarn in these brakes and its yarn guide or using corresponding auxiliary entry tool (such as Long plastic wire) it penetrates by hand, or pneumatic entry device is utilized, wherein passing through yarn automatically by gas using suction airflow The open channel of dynamic effect.
Describe a kind of spherical yarn that can use spring force adjustment according to claim 1 in 2 336 408 B1 of EP Linear brake, with upper braking face ring, lower braking face ring and the detent ball between the two braking face rings.Brake force tune Whole spring is clamped or is acted between the top surface and spring element support of braking face ring, this is assembling and/or is maintaining It may result in difficulty when Yarn Brake.Spring force is adjusted by way of adjusting yarn feeding pipe height step by step, to change work Power for upper braking face ring.When pneumatically passing inside or through yarn or yarn, using negative pressure lower braking surface ring is moved downward, To the open path for passing through brake for air-flow, so that the yarn for being adjacent to yarn feeding pipe upper end passes through entire brake.Braking Ball is avoided at this time or laterally or is adjacent on the receiving element for constituting brake casing component part, thus for yarn or Yarn opens path.When for example in order to generally maintained or cleaning and when opening the shell of brake, there are detent balls The danger for falling off and losing.
Summary of the invention
Task of the invention lies in a kind of spherical Yarn Brake is designed, to guarantee that detent ball is being maintained and cleaned It will not fall off from brake casing when work.
In order to prevent detent ball from staying in lower braking when adjustment in pneumatic entry and therefore under caused lower braking surface circumferential direction In face ring, is braked at two and be provided with the braking ball capturing device form that can be worked during pneumatic entry between face ring Detent ball holding meanss are arranged on the lower end for braking the sleeve of face ring in carrying, and the design of its structure is the present invention the The theme of two aspects.
It is described according to a second aspect of the present invention in order to avoid yarn feeding pipe height adjusts (in order to adjust brake force), the present invention Extended core thought be, merely by the rotation of yarn feeding pipe cause adjust brake force.Upper braking face ring is incorporated into thus The rotary motion of yarn feeding pipe can be transformed into the element of the axial movement of upper braking face ring.
Detailed description of the invention
It will be described in detail in accordance with the accompanying drawings the present invention below:
Fig. 1 shows the axial section of Yarn Brake of the invention in the first adjustment position;
Fig. 2 shows the axial sections according to Fig. 1, but are in the position for having rotated 90 ° relative to Fig. 1;
Fig. 3 and Fig. 4 shows the axial section according to Fig. 1 and Fig. 2, and Yarn Brake is in second adjustment position;
Fig. 5 shows axial direction of the Yarn Brake of the present invention during pneumatic entry in the first adjustment position and cuts open Face corresponds to Fig. 1 and the first adjustment position shown in Fig. 2;
Fig. 6 shows the axial section of Yarn Brake shown in Fig. 5, and Yarn Brake is in be had rotated relative to Fig. 5 In 90 ° of position;
Fig. 7 and Fig. 8 shows the axial section according to Fig. 5 and Fig. 6, is in second adjustment position;
Fig. 9 shows the amplification axial section of the lower part of Yarn Brake shown in Fig. 4;
Figure 10 shows the amplification axial section on the top of Yarn Brake shown in Fig. 4;And
Figure 10 B shows the radial section splitted according to the B-B in the cutting line A-A or Figure 10 in Fig. 9.
Reference signs list
1 brake casing
2 upper housing sections
2.1 lock groove
2.3 lock ring
2.4 window
3 lower case sections
3.1 support lug
4 yarn feeding pipes
4.1 lock ring
4.2 arm
4.3 protrusion
4.4 locking lugs
5 have the sleeve of the slot or sliding slot guiding device that are arranged on outside
5.1 spiral helicine slots or sliding slot guiding device
5.2 flange ring
5.3 locking lugs
Face ring (ceramic guide eye) is braked on 6
7 detent balls
8 holding elements
9 working pistons
9.1 piston base
9.2 pipe fitting
10 lower brakings face ring (ceramic guide eye)
11 spring guide sleeves
12 return springs
13 spring support sleeves
13.1 arms
13.2 locking lug
The braking force adjustment device of 14 brake force adjustment form of springs
Specific embodiment
Fig. 1 and Yarn Brake shown in Fig. 2 basically comprise following part:
The brake casing 1 of tubulose, it is by a upper housing section 2 and one in a manner of releasable and upper housing portion The connected lower case section 3 of section 2 is constituted,
It is co-axially inserted yarn feeding pipe 4 in upper housing section 2, rotatably installing, which utilizes to evagination Out, be joined to and (be placed in upper housing section 2) lock ring 4.1 in lock groove 2.1 prevent yarn feeding pipe move axially,
Arm 4.2 on yarn feeding pipe, extending laterally in yarn feeding pipe is disposed or formed in, is mounted on the lower end of arm It is directed toward the protrusion 4.3 of inside;
The sleeve 5 of rotation is prevented, there is the spiral helicine slot being arranged on outside or sliding slot (Kulissen) guiding Device 5.1, the constant or non-constant screw pitch with spiral path, the protrusion 4.3 of yarn feeding pipe 4 are joined to these spiral roads Among diameter.
The length of sleeve 5 determines the length for braking the adjustment stroke of face ring 6, and can be according to required application range Appropriate selection.Sleeve 5 has flange ring 5.2 in its lower end, and the flange ring is according to preferably there are two mutually opposed for tool shown in Fig. 9 Locking lug 5.3 is joined in lock groove that is not shown in the figure, being arranged on 2 inner wall of upper housing section, to prevent sleeve 5 Rotation.
It can be connected through a screw thread, two shell parts are fixed to each other by clip or bayonet connection.
In the lower end of the upper braking face ring 6 insertion sleeve 5 of ceramic guide eye form.
Further, it would be desirable to provide:
The detent ball 7 for the upper braking face ring 6 that reclines;
It is arranged in 5.2 lower section of flange ring of sleeve 5, formation capture device the holding meanss for detent ball 7;It should Holding meanss have at least two mutually opposed, aduncate holding elements 8, and free end is lower than the master of detent ball 7 below Diameter, so as to as it is following also by description as pneumatically open brake when prevent detent ball 7 from falling off;
Sealing guidance, axially movable piston 9 is mounted in lower case section 3, which points up at it Bottom 9.1 outside on carry preferably in ceramic guide eye form, lower braking face ring 10 for detent ball 7.
Lower case section 3 its lower end have be directed toward on the inside of support lug 3.1, for piston 9, preferably in pretightning force The spring guide sleeve 11 of return spring 12 under effect is supported in the support lug.Downwardly directed pipe fitting 9.2 connects To the inside of piston base 9.1, the pipe fitting is wrapped by the spring support sleeve 13 that can be moved axially relative to pipe fitting 9.2 It encloses.Spring support sleeve 13 is held on it has support lug 13.1 outwardly directed, for 12 upper end of return spring.The spring Splicing sleeve 13 within the scope of its top side have towards piston base 9.1 inside be pressed against, in brake force adjust 14 form of spring Braking force adjustment device, depending on the required application range of Yarn Brake, the brake force adjustment spring have accordingly sets The spring rate of meter.If upper braking face ring 6 is fixed in the final position of top, when Yarn Brake is in shown in Fig. 3 and Fig. 4 When adjusting in position, brake force adjustment spring 14 will occupy its position almost to relax.It is adjusted shown in fig. 1 and 2 In whole position, when braking face ring 6 in downward adjustment, brake force adjustment spring 14 will be in its shape almost compressed In state, thus brake force adjustment spring 14 applies highest brake force to the yarn continued through.
In order to further increase brake force, can preferably be continued in adjustment downwards by correspondingly designing the size of sleeve 5 Face ring 6 is braked, so that return spring 12 is also loaded and equally plays the role of brake force adjustment spring.
Arm 13.1 with outwardly directed locking lug 13.2 is arranged on the lower end of spring support sleeve 13, the locking Lug can be contacted with the stop collar 11.1 on the inside of the direction of spring guide sleeve 11.
A kind of Advantageous embodiments according to the present invention can save brake force adjustment spring 14, and act on piston 9 Return spring 12 individual play brake force adjustment spring effect, brake force adjustment spring is preferably for example in its length range The interior section different with spring rate.
It can be between Fig. 1 and Fig. 2 and Fig. 3 and extreme operating position shown in Fig. 4 and in Fig. 5 and Fig. 6 and Fig. 7 and figure It extremely entrys shown in 8 and adjusts Yarn Brake of the present invention between position.
In order to penetrate into or through yarn or yarn, negative pressure is applied by the central opening to lower case section 3, so that lower work Plug 9 overcomes the power of return spring 12 to drop to position of entrying from operating position, and detent ball 7 is kept the holding element of device at this time 8 capture or hold, and release the connection with yarn feeding pipe 4, so as to be clamped in 4 upper end of yarn feeding pipe using sucking air Yarn pass through Yarn Brake.
Outwardly directed spring-loaded locking lug 4.4 is arranged on yarn feeding pipe 4, the locking lug engagement to cloth It sets among the retainer of the lock ring 2.3 on 2 inner periphery of upper housing section.It is mounted on yarn feeding pipe 4 and prolongs in circumferencial direction (not shown in the figure) numeric scale (can be seen by the window being arranged in upper housing section 2) stretched, so as to root The corresponding rotation position of yarn feeding pipe 4 is read according to bonding station of the locking lug 4.4 in lock ring 2.3, and is identified with this The brake force braking the height and position of face ring (6) and adjusting accordingly.
In order to obtain very big brake force range using known capsule-type Yarn Brake, it is so far as previously described It only needs with trouble and therefore unfavorable mode uses a variety of capsules with different braking power range, because each individual Capsule depends particularly on the spring force of the spring in capsule, can only be respectively for limited brake force range.
The disadvantage is eliminated using spherical Yarn Brake of the present invention, wherein the brake force of brake force is caused to adjust Device is arranged in lower 10 lower section of braking face ring, and
14 form of spring is adjusted in brake force as modification A;
As modification B, 14 form of spring is adjusted in the brake force assisted by return spring 12, or
As modification C, in simple 12 form of return spring.

Claims (11)

1. a kind of spherical Yarn Brake for two-for-one twisting spindles, the spherical shape Yarn Brake include:
The brake casing (1) of tubulose, the brake casing is by upper housing section (2) and can be with the upper housing section can release The lower case section (3) that the mode of putting connects is constituted;
The yarn feeding pipe (4) that can be installed to coaxial rotating in the upper housing section (2);
The upper braking face ring (6) for corresponding to the yarn feeding pipe (4), the height adjustment that face ring is braked on this are fed by the way that rotation is described Spool (4) is realized;
With the detent ball (7) of upper braking face ring (6) interaction;
Piston (9) sealing guidance in the lower case section (3), can moving axially, the piston
Lower braking face ring (10) is carried on the outside of the bottom that it is pointed up (9.1), and
In order to which yarn or the pneumatic of yarn pass through, the power of return spring (12) can be overcome to adjust downwards in the axial direction using suction,
The holding meanss for the detent ball being arranged between described two braking face rings,
The braking force adjustment device for the brake unit being made of described two braking face rings and the detent ball is acted on,
It is characterized in that,
The holding meanss for the detent ball (7) are arranged in the sleeve (5) for carrying upper braking face ring (6) On lower end, the holding meanss have at least two mutually opposed, aduncate holding elements (8), the holding element from As the plane where holding the diameter being horizontally situated lower than the detent ball (7).
2. spherical shape Yarn Brake according to claim 1, which is characterized in that the yarn feeding pipe (4) is to prevent axial shifting Dynamic mode rotates installation, and the element by making rotary motion become axial movement acts on the upper braking face ring (6).
3. spherical shape Yarn Brake according to claim 1 or 2, which is characterized in that brake force adjusts spring (14) installation On the spring support sleeve (13) that can be moved axially in the piston (9), the return spring (12) is in the lower braking It exerts a force on the direction of face ring to the spring support sleeve.
4. spherical shape Yarn Brake according to claim 3, which is characterized in that the spring support sleeve (13) is held on it Support lug with the outwardly directed upper end for the return spring (12), the lower end of the return spring (12) is by referring to Support lug (3.1) inwardly is supported at the lower end of the lower case section (3).
5. spherical shape Yarn Brake according to claim 3, which is characterized in that the piston (9), which is equipped, is connected to institute State the inside pipe fitting (9.2) of the opening of piston base (9.1) and lower braking face ring (10), the spring support sleeve (13) It is directed axially on pipe fitting on the inside of this.
6. spherical shape Yarn Brake according to claim 3, which is characterized in that equipped with being arranged in the lower case section (3) in and the spring guide sleeve (11) of the support return spring (12), the spring support sleeve (13) are oriented in the spring It is guided in sleeve, the spring support sleeve is equipped with outwardly directed locking lug (13.2), is used for and the spring-loaded Cover the stop flange interaction on the inside of the direction of (13).
7. spherical shape Yarn Brake according to claim 2, which is characterized in that the element is can be in the upper housing Sleeve (5) move axially in section (2), anti-rotational, the sleeve have spiral helicine sliding slot guiding device on the outside (5.1), the protrusion (4.3) for being directed toward inside is joined in the sliding slot guiding device, and the protrusion is the yarn feeding pipe (4) Component.
8. spherical shape Yarn Brake according to claim 7, which is characterized in that equipped with being arranged laterally on the yarn feeding pipe (4) the forked arm (4.2) on, the protrusion (4.3) are placed on these arms.
9. spherical shape Yarn Brake according to claim 7 or 8, which is characterized in that the upper braking face ring (6) is arranged in At the lower end of the sleeve (5).
10. spherical shape Yarn Brake according to claim 1, which is characterized in that equipped with being arranged on the yarn feeding pipe (4) , outwardly directed locking lug (4.4), the locking lug engagement is to being arranged on the inner wall of the upper housing section (2) Lock ring (2.3) in, the lock ring have protruding radially inward retainer.
11. spherical shape Yarn Brake according to claim 10, which is characterized in that equipped with being placed in upper housing section (2) In window (2.4), the window is for checking the numeric scale being disposed in a circumferential direction at yarn feeding pipe (4), the numeric scale The corresponding rotation position of the yarn feeding pipe (4) is indicated according to bonding station of the locking lug (4.4) in lock ring (2.3), and And thereby indicate that depend on the brake force of the setting of the height and position of upper braking face ring (6).
CN201611114138.XA 2015-11-04 2016-11-01 Spherical Yarn Brake for two-for-one twisting spindles Active CN106637554B (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE102015118878.3A DE102015118878B3 (en) 2015-11-04 2015-11-04 Ball thread brake for a double-twisting spindle
DE102015118878.3 2015-11-04

Publications (2)

Publication Number Publication Date
CN106637554A CN106637554A (en) 2017-05-10
CN106637554B true CN106637554B (en) 2019-04-30

Family

ID=57240865

Family Applications (1)

Application Number Title Priority Date Filing Date
CN201611114138.XA Active CN106637554B (en) 2015-11-04 2016-11-01 Spherical Yarn Brake for two-for-one twisting spindles

Country Status (4)

Country Link
EP (1) EP3168343B1 (en)
CN (1) CN106637554B (en)
DE (1) DE102015118878B3 (en)
ES (1) ES2744196T3 (en)

Family Cites Families (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
BE492203A (en) * 1949-01-12
DE1923309U (en) * 1965-05-29 1965-09-09 Berliner Maschb Actien Ges Vor THREAD BRAKE FOR TWISTING MACHINES.
DE2830265C2 (en) * 1978-07-10 1983-01-13 Palitex Project-Company Gmbh, 4150 Krefeld Two-for-one twisting spindle
DE3104748C2 (en) * 1981-02-11 1984-11-08 Palitex Project-Company Gmbh, 4150 Krefeld Thread brake that can be threaded through pneumatically, especially for a two-for-one twisting spindle
DE3134763C2 (en) * 1981-09-02 1983-12-01 Palitex Project-Company Gmbh, 4150 Krefeld Thread brake for a two-for-one twisting spindle
JPS5940372U (en) * 1982-09-07 1984-03-15 村田機械株式会社 ring tensor
DE3243157C2 (en) * 1982-11-23 1985-01-24 Palitex Project-Company Gmbh, 4150 Krefeld Thread brake with associated threading device operated by compressed air, especially for two-for-one twisting spindles
DE3336715C2 (en) * 1983-10-08 1986-03-20 Palitex Project-Company Gmbh, 4150 Krefeld Thread brake
DE4010019A1 (en) * 1990-03-29 1991-10-02 Palitex Project Co Gmbh Yarn folding machinery - has yarn directional guides suitable for hollow spindles
DE102007023143B4 (en) * 2007-05-16 2021-05-12 Saurer Technologies GmbH & Co. KG Spring-loaded thread brake
DE102009058979A1 (en) * 2009-12-18 2011-06-22 Oerlikon Textile GmbH & Co. KG, 42897 Yarn brake for a double twisting spindle

Also Published As

Publication number Publication date
EP3168343B1 (en) 2019-06-12
DE102015118878B3 (en) 2017-03-16
ES2744196T3 (en) 2020-02-24
CN106637554A (en) 2017-05-10
EP3168343A1 (en) 2017-05-17

Similar Documents

Publication Publication Date Title
CN107299422B (en) Carpet yarn twisting machine
US4281508A (en) Yarn brake mechanism
CN106637554B (en) Spherical Yarn Brake for two-for-one twisting spindles
US4468920A (en) Pneumatically threadable yarn brake and a two-for-one twisting spindle equipped therewith
JP2005112632A (en) Winding device
CN106637555B (en) Ball-type Yarn Brake for two-for-one twisting spindles
US5626302A (en) Sewing machine cone spool to spindle adapter
US6347505B2 (en) Yarn brake and a two-for-one twisting spindle having such a yarn brake
CN101638820B (en) Low-tension yarn unwinding device of double-twist spindle
CN1978719B (en) Open-end spinning device with an exchangeable twist congesting element
CN102102251B (en) Yarn tension device for a double-strand twisting spindle
EP0498077B1 (en) Two-for-one twisting spindle
CN107074478B (en) Doffer clamper with two-part shell
US3783597A (en) Thread-twisting apparatus with dual thread guide
US3895484A (en) Spinning apparatus
CN116427070A (en) Yarn conveying device
US20020033012A1 (en) Method and apparatus for the simultaneous centralized control of the yarn brakes of twist spindles of a two-for-one twisting machine
CN101654825B (en) Clamping device
CZ279949B6 (en) Spindle for making yarn
US6401443B2 (en) Yarn brake and a two-for-one twisting spindle having such a yarn brake
KR20170139445A (en) Thread clamping device
US5581988A (en) Yarn brake especially for two-for-one twisting spindles
US4711081A (en) Thread brake mechanism for a spindle assembly of a thread processing machine
CN201120649Y (en) Connecting mechanism for plastics circular weaving machine projector rotor and bobbin
US4302930A (en) Self-threading yarn brake mechanism

Legal Events

Date Code Title Description
PB01 Publication
PB01 Publication
SE01 Entry into force of request for substantive examination
SE01 Entry into force of request for substantive examination
GR01 Patent grant
GR01 Patent grant
TR01 Transfer of patent right

Effective date of registration: 20191216

Address after: Crayfield, Germany

Patentee after: If the cable technology & Limited by Share Ltd

Address before: Lei Xian

Patentee before: Saurer Germany GmbH & Co KG

TR01 Transfer of patent right