US3317947A - Pneumatic cleaning installation - Google Patents

Pneumatic cleaning installation Download PDF

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Publication number
US3317947A
US3317947A US409692A US40969264A US3317947A US 3317947 A US3317947 A US 3317947A US 409692 A US409692 A US 409692A US 40969264 A US40969264 A US 40969264A US 3317947 A US3317947 A US 3317947A
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carriage
pressure
machinery
chambers
pneumatic cleaning
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US409692A
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Jacobi Ernst
Beck Heinz
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    • 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
    • F16L—PIPES; JOINTS OR FITTINGS FOR PIPES; SUPPORTS FOR PIPES, CABLES OR PROTECTIVE TUBING; MEANS FOR THERMAL INSULATION IN GENERAL
    • F16L41/00—Branching pipes; Joining pipes to walls
    • F16L41/18—Branching pipes; Joining pipes to walls the branch pipe being movable
    • D—TEXTILES; PAPER
    • D01—NATURAL OR MAN-MADE THREADS OR FIBRES; SPINNING
    • D01H—SPINNING OR TWISTING
    • D01H11/00—Arrangements for confining or removing dust, fly or the like
    • D01H11/005—Arrangements for confining or removing dust, fly or the like with blowing and/or suction devices
    • D01H11/006—Arrangements for confining or removing dust, fly or the like with blowing and/or suction devices travelling along the machines
    • D—TEXTILES; PAPER
    • D03—WEAVING
    • D03J—AUXILIARY WEAVING APPARATUS; WEAVERS' TOOLS; SHUTTLES
    • D03J1/00—Auxiliary apparatus combined with or associated with looms
    • D03J1/002—Climatic conditioning or removing lint or dust

Definitions

  • the invention concerns a pneumatic cleaning installation employing a carriage adapted to travel above a textile machine and having blowing and suction members dependent therefrom.
  • Known travelling pneumatic installations of this type usually employ a carriage which can travel over a textile machine or line thereof under the action of driving means, for example, an electric motor, incorporated on the carriage, the same or different driving means serving for the drive of a fan or fans for the production of the suction and blowing air currents, filter means and a storage chamber for collected dust, fly, lint or the like also being mounted on the carriage.
  • driving means for example, an electric motor, incorporated on the carriage, the same or different driving means serving for the drive of a fan or fans for the production of the suction and blowing air currents, filter means and a storage chamber for collected dust, fly, lint or the like also being mounted on the carriage.
  • struction primarily because its Working parts must be disposed in close relationship.
  • the pneumatic cleaning device includes at least one carriage adapted for movement over a line of textile machinery which carriage substantially carries only blowing and/ or suction cleaning members communicating with pressure and or suction chambers on the carriage, there being pressure and/or suction pipes connecting said chambers with a stationary fan-filter unit, said pipes being of a type which permit movement of the carriage.
  • FIG. 1 is a side elevation of a first embodiment for operation on a single line of textile machinery
  • FIG. 2 is a top view of the embodiment of FIG. 1;
  • FIG. 3 shows a top plan view of an installation incorporating several carriages, each similar to that of the arrangement of FIG. 1, for operation on several lines of textile machinery;
  • FIG. 4 shows a side elevation of a slightly modified installation seen on FIG. 3 in a direction corresponding with that of the arrow IV;
  • FIG. 5 shows an elevation of the installation of FIG. 4 in the direction of the arrows V on FIG. 4;
  • FIG. 6 shows a variation which may be applied to any of the arrangements of FIGS. 1-5;
  • FIG. 7 shows a compensating device
  • FIG. 8 shows side elevation of an embodiment utilizing a telescopic pipe
  • FIG. 9 shows a section of telescopic connection point of the embodiment of FIG. 8.
  • double line rail track 13, 13' is provided and located on supports 12 above a ring spinning machine 11.
  • a substantially rectangular box shaped carriage 14 is provided and adapted to run on the rail track 13, 13.
  • a number of walls For example, as can be seen in FIG. 2, two dividing walls 16 and 16' are provided so that one suction chamber 17 and two pressure chambers 18 and 18 result.
  • the chamber 18 communicates with the chamber 18' by means of a connection (not shown).
  • Pressure hoses 19 and 19' having blowing nozzles 20 and 20' depend on each side in known manner from the pressure chambers 18 and 18' respectively.
  • Suction hoses 21 having suction nozzles 22 depend on each side from the suction chamber 17, and the nozzles 22 terminate adjacent the floor 23.
  • a fixed fan-filter unit 24 is located at or adjacent one end of the spinning frame 11.
  • the unit 24 (shown schematically) essentially comprises a box which is divided into a pressure chamber 26 and suction chamber 27 by an intermediate wall 25 formed from a perforated sheet, thereby to constitute a filter.
  • a fan 28 is disposed in the chamber 26 and air flows through the filter wall 25 in the direction of the arrow 29.
  • the suction chamber 27 which is of substantially L-shaped cross-section also serves as a collection chamber for fly or the like, and can be emptied at any time by the opening of a flap 30. Automatic or semi-automatic emptying is also possible if desired by provision of a suction pipe communicating with the chamber 27 via suitable means at a central position, the closure means'being opened periodically or non-periodically, automatically or manually.
  • the carriage 14 is connected to the fan-filter-unit 24 by two expandable airtight pipes 31 and '32 each of cou certina-type construction.
  • the pipe 31 connects the pressure chambers 18 and 18 of the carriage 14 with the pressure chamber 26 of the unit 24, and the pipe 32 forms a connection between the suction chamber 27 of the unit 24 and the suction chamber 17 of the carriage 14.
  • Drive means is provided consisting of an endless cable 33 which is led over pulleys 34 and 34', arranged adjacent to the ends of the spinning frame so that the carriage 14 can move to and fro over the whole length of the frame.
  • the pulley 34' is driven by a belt 35 extending over a pulley 36 Which is driven from any suitable part of the mechanism of the spinning frame.
  • the carriage 14 is releasably linked or coupled onto the cable 33 by a pivoted or otherwise articulated member, in such manner that it is towed continuously to and fro by the cable or rope 33 in the direction of arrows 37 and 37' (FIG. 2), the carriage running to and fro from one end of the spinning frame to the other as indicated by the double arrow 38.
  • the pipes 31 and 32 which are constructed as coil hoses shorten or lengthen appropriately.
  • the pipes 31 and 32 have a diameter of 20 cm., and are tightly connected by their ends to the appropriate chambers.
  • blowing air flows out of the pressure chamber 26 through the pipe 31 into the pressure chambers 18 and 18' of the carriage and thence through the blowing hoses 19 and 19' and nozzles 20 and 20' onto parts of the spinning machinery, which can be selected as desired, by adjusting the lengths of the hoses 19 and 19: and the type of nozzle 20 and 20
  • suction air which is drawn through the suction pipes and nozzles 21 and 22 and is laden with fly (fibrous dust) flows through the pipe 32 in the direction of the arrow 40 and enters the suction chamber 27 and thence passes as shown by arrow 29 through the filter wall into the pressure chamber 26 whence it is passed out through the pipe 31 as blowing air.
  • a substantially closed air flow results which is only modified by the distances between the nozzles 20 and 20 on the one hand and 22 on the other. The same amount of air is always sucked up as shown by the arrow as is blown out as shown by arrow 39.
  • Scrapers or the like, blowers, brushers or similar devices can be provided at 25, to convey the fly from the filter wall 25 in the direction indicated by arrow 41 into the lower part of the suction chamber 27. From there the dust and fly can be removed through the flap 30 or by other means as already stated.
  • Carriages 14a, 14b, 14c are in each case arranged on the rails 13a, 13b, 13b, 13c, 13c, on, for example, six spinning machines set up parallel to one another and at the normal distance apart.
  • Each carriage has two concertina-type pipes 31a, 32a, 31b, 32b, The carriages are shown in various positions of travel.
  • the position of carriage 14b is substantially one of the end positions wherein the pipes 31b and 32b are greatly compressed.
  • the position of carriage Me is substantially the other end position wherein the pipes 31c and 320 are fully expanded.
  • suction chamber 27 of the arrangement of FIGS. 1 and 2 is here extended into a suction channel 27:: which is as long as the total length of the group of machines.
  • pressure chamber 26 of the arrangement of FIGS. 1 and 2 is extended to a pressure channel 26a which is as long as the channel 27a. Both channels are closed at one end by end walls 42 and 43. At the other end a curved connector 44 is provided which incorporates the fan 28 and filter wall '25.
  • the fan 28 is preferably arranged behind the filter 25 in the direction of flow, since the fan will forward air which is already filtered.
  • All the pipes 32a, 32b, 32c, of the carriages 14a, 14b, 140 are attached to the suction channel 27a, and all the pipes 31a, 31b, 31c are attached to the pressure channel 26a. From this it results that all the pressure chambers 1-8 and 18' of all the carriages 14 are fed with air from the pressure channel 26a and that all the suction chambers 17 of the carriages 1-4 supply fly laden air to the suction channel 27a.
  • the pipes 31, 32a it is convenient for the pipes 31, 32a, to run substantially at right angles to the channels 26a and 27a. This is not however absolutely essential and is largely determined by constructional conditions. Thus, the angle may be other than a right angle for an installation in a room having inclined walls.
  • the channel 26a can be disposed in downwardly inclined relationship with respect to the channel 27a. In this case it is convenient to provide a rigid pipe 45 between each pipe 31 and the channel 26a.
  • the suction channel 27a may for example, if desired also have a square cross-section.
  • a filter 47 in the form of an endless band is provided in place of the Wall 25, and is positioned in front of the fan 28 seen in the direction of air flow 46.
  • the filter 47 is adapted to revolve continuously and is scraped at a suitable position by a scraper 48 so that the fly collected thereon falls into the suck or similar container 49 and deposits itself therein as indicated at 50.
  • the waste container 49 is removable for emptying purposes, but may be arranged for automatic emptying if desired.
  • a feature which favours good operation of the cleaning installation and also the spinning process is the addition of a dampening member 51, which, seen in the direction of flow is advantageously located after or behind the fan 28 and correctly conditions the blowing air by spraying in liquid 52.
  • an air heating or air cooling device may be provided in addition, at any suitable position, such as for example at positions 53 or 53 in the pressure channel 26a. It can also be arranged that the liquid or water spray 52 and/or the heating or cooling of the air 53 is adjusted or regulated in proportion to one or more predetermined or desired values.
  • the units 24 may be suspended substantially centrally above the machines 11, for example, from the ceiling of the spinning room so that the pipes 31 and 32 swing to and fro in the fashion of a pendulum as the carriage travels to and fro along the track, lengthening and shortening correspondingly.
  • Such an arrangement may also be used for a group of machines as in FIG. 3.
  • each fan-filter unit 24 is fixed to the ceiling of the spinning room.
  • the chambers 26 and 27 of the unit 24 are connected with concertina-type flexible pipes 31 and 32 which leads in the manner already described.
  • the difference here as against the embodiments previously described is that the pipes 31 and 32 enter the box or casing of the carriage 14 from above. In this case too, the carriage 14 is moved to and fro, by a cable 3 3, along the track rails 13 and 13.
  • FIG. 7 shows how any lateral force exerted on the carriage 14 by the pipes 31 and 32 in extension or compression thereof may be compensated.
  • a counter spring 54 may be provided which is turned to the resilient forces of the pipes 31 and 32.
  • FIGS. 8 and 9 show an embodiment wherein the expandable pipes are of telescopic construction.
  • FIG. 8 shows, by way of example, an arrangement substantially as that of FIGS. 1 and 2, but wherein the pipes 31 and 32 are replaced by telescopic units.
  • the carriage 14 which may be designed and built in the manner already described runs on a rail 13 which is located adjacent to or above the spinning machine 11.
  • Telescopic pipe units are arranged between the carriage 14 and the chambers 26 and 27, of the fan-filter unit 24.
  • Each pipe consists of a plurality of individual telescopic pipes 80" and so on which can be pushed into and drawn out of one another, the telescopic pieces 80 on the extreme left (FIG. 8) being secured to the chambers 26 and 27 and the pieces 80" at the extreme right being attached to the carriage 14.
  • the individual telescopic pieces 80', 80" push into one another, and conveniently and advantageously support rollers 81', 81 are arranged on the ends of same or all of the telescopic pieces 80', 80" etc.
  • the support rollers may run on the rail 13 or on a separate rail, which is present in any case and ensures the alignment of the individual telescopic pieces 80', 80".
  • a connection between the telescopic pieces 80', 80" is shown by way of example in detail in FIG. 9 on an enlarged scale. Such connection points are in each case present between adjacent telescopic pieces.
  • the inter-embracing ends 82 and 83 of the telescopic pieces 80' and 80 can be formed with corrugations.
  • the difference in diameter between the pieces 80' and 80" substantially corresponding with the Weight of the corrugations.
  • the end 82 carries at a suitable position on the periphery thereof a sliding seal ring '84, consisting of a flexible, resilient material for example a rubber of suitable shore-hardness, or a plastic.
  • the sealring 84 is in sliding contract with the inner wall of the piece 80' and moreover in the uncorrugated part thereof.
  • the end 83 carries an inner seal-ring 85 which is adapted to slide on the uncorrugated part of the outer wall of the piece 80.
  • a suificient seal is thus produced by these seal-rings 84 and '85.
  • other methods of sealing may of course be used.
  • the working will however generally be such that, for example, with a pendulating the textile machine will only be sucked (with full closure), or sucked and blown to a lesser degree, during one direction of travel and only blown (with complete closure), or (with partial closure) blown and sucked to a lesser degree during the opposite direction of travel.
  • the new principle of using or making available the high and low pressures in the pipes for the movement of the carriage can be employed when the pipes are of a type which have a tendency to bulge out or move out laterally, in which case guides to keep the pipes straight should be provided.
  • a travelling pneumatic cleaning installation for textile machinery and the like comprising in combination, at least one carriage adapted to be moved over a line of the machinery to be cleaned; at least two chambers on said carriage; a fixed stationary fan-filter unit in the vicinity of said machinery, said fan-filter unit having a suction inlet end and a pressure outlet end; at least two collapsible and extensible pipe means, one of said pipe means being permanently connected at one end thereof to said suction inlet end of said unit and at the other end thereof with one of said chambers and the other of said pipe means being permanently connected at one end thereof to said pressure outlet end of said unit and at the other end thereof with the other of said chambers, whereby said chambers are held at a pressure different from atmospheric pressure and the pressure in one chamber different from the pressure in the other chamber; and a number of ducts communicating at one end thereof with said chambers, respectively, and each having an other open end directed towards said machinery so as to produce between said open ends of said ducts currents of air for cleaning purposes.
  • a travelling pneumatic cleaning installation according to claim 3 wherein support rollers are provided on at least some of said pieces.
  • a travelling pneumatic cleaning installation according to claim 4 wherein the ends of said telescopically interconnecting pieces are formed with corrugations.
  • a travelling pneumatic cleaning installation according to claim 5 wherein external and internal sealing rings are provided for each said piece, said rings being capable of sliding on the uncorrugated areas of the corresponding inner and outer surfaces of said pieces, respectively, thereby to form an airtight seal therebetween.
  • a travelling pneumatic leaning installation accord ing to claim 6 wherein an annular sealing lip is provided on one end of each said piece, said lip projecting substantially thereover, the free end of said lip being adapted to slide to form a resilient seal on the outer surface of the following telescopically interconnecting piece of smaller diameter, the lip consisting of a resilient material.
  • a travelling pneumatic cleaning installation accordng to claim 3 wherein the ends of said telescopically interconnecting pieces are formed with corrugations.
  • a travelling pneumatic cleaning installation according to claim 8 wherein external and internal sealing rings are provided for each said piece, said rings being capable of sliding on the uncorrugated areas of the corresponding inner and outer surface of said pieces, respectively, thereby to form an airtight seal therebetween.
  • a travelling pneumatic cleaning installation according to claim 9 wherein an annular sealing lip is provided on one end of each said piece, said lip projecting substantially thereover, the free end of said lip being adapted to slide to form a resilient seal on the outer surface of the following telescopically interconnecting piece of smaller diameter, the lip consisting of a resilient material.
  • each said pipe means is of resilient concertina-type coiled construction.
  • a travelling pneumatic cleaning installation according to claim 12, wherein at least one blowing pipe means and at least one suction pipe means is provided, and including means for periodically restricting at least to some extent the air flow in each said pipe means alternately, whereby the carriage is caused to move to and fro over the line of machinery under pneumatic action.
  • Travelling pneumatic cleaning installation according to claim 13 and adapted to operate on a plurality of lines of textile machinery, arranged in parallel, there being one said carriage for each said line, and including two air channels one of which is connected to said suction inlet and the other of which is connected to said pressure outlet of said fan-filter and extending from the same in a line substantially at right angles to the direction of said lines of machinery, said pipe means connecting said carriages with said channels.
  • Travelling pneumatic cleaning installation according to claim 11 and adapted to operate on a plurality of lines of textile machinery, arranged in parallel, there being one said carriage for each said line, and including two air channels one of which is connected to said suction inlet and other of which is connected to said pressure outlet of said fan-filter unit and extending from the same in a line substantially at right angles to the direction of said lines of machinery, said pipe means connecting said carriages with said channels.
  • Travelling pneumatic cleaning installation according to claim 16, and adapted to operate on a plurality of lines of textile machinery, arranged in parallel, there being one said carriage for each said line, and including two air channels one of which is connected to said suction inlet and the other of which is connected to said pressure outlet of said fan-filter unit and extending from the same in a line substantially at right angles to the direction of said lines of machinery, said pipe means connecting said carriages with said channels.
  • a travelling pneumatic cleaning installation including a towing cable in the form of an endless band mounted above said line of machinery, an articulated connection between said carriage and said towing cable, and means to drive said cable, whereby said carriage moves to and fro over said line of machinery.
  • Travelling pneumatic cleaning installation according to claim 19 wherein said towing cable is arranged to be driven from the motion of said textile machinery.
  • a travelling pneumatic cleaning installation including a towing cable in the form of an endless band mounted above said line of machinery, an articulated connection between said carriage and said towing cable, and means to drive said cable, whereby said carriage moves to and fro over said line of machinery.
  • a travelling pneumatic cleaning installation including a towing cable in the form of an endless band mounted above said line of machinery, an articulated connection between said carriage and said towing cable, and means to drive said cable, whereby said carriage moves to and fro over said line of machinery.
  • a travelling pneumatic cleaning installation according to claim 1 wherein the filter of said fan-filter unit is disposed on the suction side of said fan, and including a receptacle which may be emptied by suitable means to collect material gathered on said filter.
  • a travelling pneumatic cleaning installation according to claim 25 including means for scraping material collected on said filter and delivering same to said receptacle.
  • a travelling pneumatic cleaning installation according to claim 1 and adapted to operate on a plurality of lines of textile machinery, arranged in parallel, there being one said carriage for each said line, and including two air channels one of which is connected to said suction inlet and the other of which is connected to said pressure outlet of said fan-filter unit and extending from the same in a line substantially at right angles to the direction of said lines of machinery, said pipe means connecting said carriages with said channels.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Textile Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Spinning Or Twisting Of Yarns (AREA)
US409692A 1963-11-12 1964-11-09 Pneumatic cleaning installation Expired - Lifetime US3317947A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DEJ24732A DE1291668B (de) 1963-11-12 1963-11-12 Pneumatische Reinigungsanlage fuer Spinnmaschinen od. dgl.

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CH (1) CH429524A (de)
DE (1) DE1291668B (de)
GB (1) GB1015070A (de)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4484434A (en) * 1981-03-04 1984-11-27 Sohler Airtex Gmbh Movable cleaning apparatus for drafting mechanism of spinning and twisting machines
CN105133158A (zh) * 2015-09-10 2015-12-09 湖州乐而达纺织有限公司 一种纺织机双面除尘装置
US11419466B2 (en) 2020-03-25 2022-08-23 Milwaukee Electric Tool Corporation Dust collector assembly

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* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5279105A (en) * 1990-01-31 1994-01-18 Kabushiki Kaisha Toyoda Jidoshokki Seisakusho Roving chip collecting system for roving bobbin replacing apparatus
DE4020421A1 (de) * 1990-06-27 1992-01-02 Rieter Ag Maschf Vorrichtung zum spinnen eines fadens
CN108193334B (zh) * 2018-03-28 2023-11-21 湖北天门纺织机械股份有限公司 一种环锭细纱机新型吸棉装置
CN109208128A (zh) * 2018-11-23 2019-01-15 嘉兴学院 一种具有湿度调节功能的清洁型纺织设备
CN118147809B (zh) * 2024-05-11 2024-07-12 南通蔚鑫色织有限公司 一种纺织用纺织机纺织隔热集尘罩

Citations (9)

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Publication number Priority date Publication date Assignee Title
GB190903113A (en) * 1909-02-09 1910-01-27 Vernon Heywood Stott Improvements in the Method of Exhausting or Removing Dust from Machines or Apparatus particularly applicable for Exhausting Dust from Carding Engines during the Process of Stripping and Grinding.
US1630972A (en) * 1926-05-24 1927-05-31 Schmid Karl Suction device for removing waste and dust
US2000112A (en) * 1933-03-30 1935-05-07 Wheller Harry Stewart Heater
US2431726A (en) * 1945-09-12 1947-12-02 Pneumafil Corp Pneumatic collection and air conditioning for textile spinning frames
US2830510A (en) * 1954-04-13 1958-04-15 Nazzareno J Mariani Machine for distributing road building materials
US3003177A (en) * 1958-07-15 1961-10-10 Nippon Spindle Mfg Co Ltd Nozzle construction for textile machinery cleaning apparatus
US3018503A (en) * 1956-12-27 1962-01-30 Nippon Spindle Mfg Co Ltd Frame cleaning device utilizing exhaust air from a suction cleaner in spinning and like operations
US3045274A (en) * 1959-07-15 1962-07-24 Sohler Hubert Traveling suction cleaner for textile mills
GB907545A (en) * 1959-02-10 1962-10-10 Sulzer Ag Air conditioning apparatus for textile machines

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* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3055038A (en) * 1961-08-01 1962-09-25 Parks Cramer Co Traveling cleaning apparatus

Patent Citations (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB190903113A (en) * 1909-02-09 1910-01-27 Vernon Heywood Stott Improvements in the Method of Exhausting or Removing Dust from Machines or Apparatus particularly applicable for Exhausting Dust from Carding Engines during the Process of Stripping and Grinding.
US1630972A (en) * 1926-05-24 1927-05-31 Schmid Karl Suction device for removing waste and dust
US2000112A (en) * 1933-03-30 1935-05-07 Wheller Harry Stewart Heater
US2431726A (en) * 1945-09-12 1947-12-02 Pneumafil Corp Pneumatic collection and air conditioning for textile spinning frames
US2830510A (en) * 1954-04-13 1958-04-15 Nazzareno J Mariani Machine for distributing road building materials
US3018503A (en) * 1956-12-27 1962-01-30 Nippon Spindle Mfg Co Ltd Frame cleaning device utilizing exhaust air from a suction cleaner in spinning and like operations
US3003177A (en) * 1958-07-15 1961-10-10 Nippon Spindle Mfg Co Ltd Nozzle construction for textile machinery cleaning apparatus
GB907545A (en) * 1959-02-10 1962-10-10 Sulzer Ag Air conditioning apparatus for textile machines
US3045274A (en) * 1959-07-15 1962-07-24 Sohler Hubert Traveling suction cleaner for textile mills

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4484434A (en) * 1981-03-04 1984-11-27 Sohler Airtex Gmbh Movable cleaning apparatus for drafting mechanism of spinning and twisting machines
CN105133158A (zh) * 2015-09-10 2015-12-09 湖州乐而达纺织有限公司 一种纺织机双面除尘装置
CN105133158B (zh) * 2015-09-10 2018-03-30 浙江品创知识产权服务有限公司 一种纺织机双面除尘装置
US11419466B2 (en) 2020-03-25 2022-08-23 Milwaukee Electric Tool Corporation Dust collector assembly

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Publication number Publication date
GB1015070A (en) 1965-12-31
DE1291668B (de) 1969-03-27
CH429524A (de) 1967-01-31

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