EP0065496B1 - Rotary tool for high speed machining of wood, plastics or light metals - Google Patents
Rotary tool for high speed machining of wood, plastics or light metals Download PDFInfo
- Publication number
- EP0065496B1 EP0065496B1 EP82830097A EP82830097A EP0065496B1 EP 0065496 B1 EP0065496 B1 EP 0065496B1 EP 82830097 A EP82830097 A EP 82830097A EP 82830097 A EP82830097 A EP 82830097A EP 0065496 B1 EP0065496 B1 EP 0065496B1
- Authority
- EP
- European Patent Office
- Prior art keywords
- clamp body
- insert
- tool
- housing space
- resisting block
- 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.)
- Expired
Links
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Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B27—WORKING OR PRESERVING WOOD OR SIMILAR MATERIAL; NAILING OR STAPLING MACHINES IN GENERAL
- B27G—ACCESSORY MACHINES OR APPARATUS FOR WORKING WOOD OR SIMILAR MATERIALS; TOOLS FOR WORKING WOOD OR SIMILAR MATERIALS; SAFETY DEVICES FOR WOOD WORKING MACHINES OR TOOLS
- B27G13/00—Cutter blocks; Other rotary cutting tools
- B27G13/08—Cutter blocks; Other rotary cutting tools in the shape of disc-like members; Wood-milling cutters
- B27G13/10—Securing the cutters, e.g. by clamping collars
Definitions
- This invention concerns a rotary tool for high-speed machining of wood, plastics or light metals.
- this invention is concerned with the problem of clamping inserts in rotary tools which are employed advantageously for the processing of wood or plastics, or, in any case, in tools which rotate at high speed.
- Clamping means should preferably to provided which align and secure the insert automatically.
- Patent CH-A-619.880 discloses a system for fixture of inserts by which the insert is retained by a clamping element provided with means able to retain the insert positively.
- the clamping element in its turn is thrust by a resisting element with a wedge-wise action.
- the clamping force is provided by an adjustment screw acting between the resisting element and the body of the tool.
- a housing space which has the shape substantially of a truncated cone and which widens towards the middle of the tool holder.
- a suitable seating space for the tool At the side of the housing space is envisaged a suitable seating space for the tool, and such seating is dimensioned and positioned perfectly in relation to the middle of the tool itself so that, when such seating supports the tool or insert, the tool or insert is located perfectly in relation to the middle of the tool holder and therefore in relation to the plurality of other tools or inserts.
- the clamping body has two clamping surfaces that cooperate with resisting blocks on which a regulating or adjusting screw having a righthand thread and a lefthand thread acts.
- the regulating screw comprises in an intermediate position a ring which provides lengthwise anchorage and which can cooperate with an anchorage hollow that may possibly be included in the clamping body. Substitute means can also be visualized.
- Such anchorage ring can cooperate with a safety pin which holds the regulating screw onto the clamping body and which can exert at the same time on the clamping body an outwards thrust that constrains the clamping body to be embedded in the housing space.
- the anchorage ring has an intermediate hollow within which the safety pin is made to pass.
- the opposing surfaces are not linear but have a substantially rounded development so as to reduce to a minimum the necessity for accurate mating.
- the area of contact between the resisting blocks and the opposing wall may possibly be suitably shaped.
- the resisting block cooperates with a screw located in an almost radial position and acting on both the resisting block and the clamping body at the same time.
- the resisting block comprises a slit such that the walls of the block itself are made elastic.
- the invention provides a rotary tool for high-speed machining of wood, plastics or light metals, comprising a tool holder and a plurality of replaceable cutting inserts, the tool holder having a plurality of housing spaces that widen peripherally in the direction of the centre of the tool holder, each housing space including a stepped seating for an insert in the trailing direction relative to the.normal direction of rotation of the tool: a clamp body located in each housing space and cooperating with means to retain each insert positively in the radially outward direction: at least one resisting block located in each housing space: an adjusting screw for providing movement between each resisting block and its associated clamp body such that by reaction with the walls of the housing space there is produced a thrust in the peripheral direction of the tool holder to constrain the resisting block against an opposing wall of the housing space and to constrain the clamp body against the insert; characterized in that each adjusting screw is operable to cause a separating movement between a said clamp body and at least one said resisting block to produce firstly the said thrust and secondly a component
- FIG. 1 gives a vertical section of a possible embodiment of the invention
- a tool holder 10 comprises a housing space 11 with an opposing wall 12 and a supporting wall 13; a lateral seating 14 for a tool is provided in the supporting wall 13.
- the seating 14 for a tool includes a supporting corner 15 and a wall 16 supporting an insert.
- the conformation of the housing 11 substantially like a truncated cone has the effect that, as the wall 16 supporting an insert 23 is substantially parallel to a plane passing through the axis of the tool holder 10, the opposing wall 12 will cut such plane at a position a great deal above the middle of the tool holder 10.
- the wall 16 supporting the insert and the supporting corner of the seating 14 for a tool are positioned perfectly in relation to the centre of rotation of the tool holder 10.
- a clamping body 17 is introduced within the housing 11 and, in the example of Fig. 1, comprises a lengthwise hollow 32 in which are located two resisting blocks 18-118 cooperating with a regulating screw 19 having a righthand and a lefthand thread.
- the regulating or adjusting screw 19 includes a ring 20 for lengthwise anchorage, and such ring 20 cooperates with a hollow 21 for lengthwise anchorage formed in the clamping body 17.
- Opposing surfaces 22 are provided in the lengthwise hollow 32 of the clamping body 17 and cooperate with respective resisting surfaces 122 formed on the resisting blocks 18.
- the resisting blocks 18 are, for instance, drawn towards each other and the respective resisting surfaces 122 press on the opposing surfaces 22 of the clamping body 17.
- the position of the opposing wall 12 conditions the characteristics of the movement of the clamping body 17.
- the tool 23 comprises one or more holes 24 which cooperate with appropriate pins 25 solidly fixed to the clamping body 17.
- This action constrains the insert 23 to rest perfectly against the wall 16 and at the same time against the corner 15 and to be positioned perfectly in relation to the middle of the tool holder 10 and to the other tools.
- the clamping body 17 is advantageously envisaged as comprising a protective outlet 26 which cooperates with the cutting edge of the insert 23 lying against the supporting corner 15.
- the safety pin 27 can be single, as in Fig. 1, or double, as in Fig. 3, or can have other suitable shapes according to the requirements of the design.
- the ring 20 providing lengthwise anchorage and comprised in the regulating screw 19 can have an intermediate hollow 28 within which the safety pin 27 is made to lodge; in this way the hollow 21 providing lengthwise anchorage is rendered unnecessary.
- the embodiment now shown entails a movement substantially parallel to the axis of rotation of the tool holder 10.
- a clamping action can be obtained which is in principle substantially the same as that of Fig. 1 but which is substantially different as an embodiment to be applied.
- the resisting block 218 is thrust towards the opposing wall 12 by screw means 119, which also have a righthand and a lefthand thread and which engage the resisting block 218 and the clamping body 117 at one and the same time.
- clamping body 117 is thrust not only towards the supporting wall 13 but also towards the insert 23 and constrains the insert 23 to rest against the supporting corner 15.
- the twofold inclination permits safer and longer-lasting anchorage in the long term even when there are vibrations.
- the resisting block 318 comprises a hollow which enables the two sides A and B of the block itself to bend in relation to each other, whereby the side B is able to lodge the head 30 of the screw 230, whereas the side A can lodge the threaded part 130 thereof.
- the opposing surfaces 22-122 are rounded or crown-shaped; it can be envisaged that the sliding surfaces 31 between the body 218 and body 217 may possibly have a special shape, and so forth.
Landscapes
- Life Sciences & Earth Sciences (AREA)
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Wood Science & Technology (AREA)
- Forests & Forestry (AREA)
- Clamps And Clips (AREA)
- Automatic Tool Replacement In Machine Tools (AREA)
- Specific Conveyance Elements (AREA)
- Toys (AREA)
- Debarking, Splitting, And Disintegration Of Timber (AREA)
- Hand Tools For Fitting Together And Separating, Or Other Hand Tools (AREA)
- Crushing And Pulverization Processes (AREA)
- Turning (AREA)
- Perforating, Stamping-Out Or Severing By Means Other Than Cutting (AREA)
- Supports Or Holders For Household Use (AREA)
- Mechanical Pencils And Projecting And Retracting Systems Therefor, And Multi-System Writing Instruments (AREA)
Abstract
Description
- This invention concerns a rotary tool for high-speed machining of wood, plastics or light metals.
- In particular, this invention is concerned with the problem of clamping inserts in rotary tools which are employed advantageously for the processing of wood or plastics, or, in any case, in tools which rotate at high speed.
- It is known that the clamping of inserts is a grave problem for the safety of machine operatives and for the accurate alignment and balancing of the tools themselves.
- Lastly, the clamping of the tools is reflected in the quality of the finished product.
- At the speed at which the tools rotate nowadays, their clamping has become an important feature in that the inserts have been standardized and have reached an optimum level of performance.
- The problem to be overcome in up-to-date clamping means are manifold and indeed it is necessary to be able to obtain clamping means which are strong and stable enough to withstand all kinds of vibration.
- It is desirable to provide clamping means which do not need to be removed during assembly and dismantling.
- Clamping means should preferably to provided which align and secure the insert automatically.
- It is desirable to provide clamping means which, owing to their very nature, constrain the insert with an action that opposes centrifugal force.
- It is also desirable to provide clamping means which do not leave their housing even if they have been badly secured.
- Patent CH-A-619.880 discloses a system for fixture of inserts by which the insert is retained by a clamping element provided with means able to retain the insert positively. The clamping element in its turn is thrust by a resisting element with a wedge-wise action. The clamping force is provided by an adjustment screw acting between the resisting element and the body of the tool.
- All these purposes together with further purposes and advantages are pursued by our present invention according to this description.
- According to the invention a housing space is envisaged which has the shape substantially of a truncated cone and which widens towards the middle of the tool holder.
- At the side of the housing space is envisaged a suitable seating space for the tool, and such seating is dimensioned and positioned perfectly in relation to the middle of the tool itself so that, when such seating supports the tool or insert, the tool or insert is located perfectly in relation to the middle of the tool holder and therefore in relation to the plurality of other tools or inserts.
- Into such housing space are introduced at least two bodies which cooperate with each other by means of screw means, whereby the reciprocal action carried out by the screw means is such as to thrust one body towards an opposing wall, whereas the other body, the so-called clamping body, is thrust towards the insert.
- At the same time the insert is pushed by the latter body with a thrust substantially towards the middle of the tool holder.
- According to a first embodiment of the inven- . tion the clamping body has two clamping surfaces that cooperate with resisting blocks on which a regulating or adjusting screw having a righthand thread and a lefthand thread acts.
- By turning the screw such resisting blocks can be brought nearer to or farther from each other.
- The action of the resisting blocks on the opposing surfaces causes a sideways thrust towards the middle of the tool holder. This is so because, by pressing against the opposing wall, such blocks constrain the clamping body to move sideways towards the insert and substantially towards the middle of the tool holder.
- According to this preferred embodiment the regulating screw comprises in an intermediate position a ring which provides lengthwise anchorage and which can cooperate with an anchorage hollow that may possibly be included in the clamping body. Substitute means can also be visualized.
- Such anchorage ring can cooperate with a safety pin which holds the regulating screw onto the clamping body and which can exert at the same time on the clamping body an outwards thrust that constrains the clamping body to be embedded in the housing space.
- According to another embodiment the anchorage ring has an intermediate hollow within which the safety pin is made to pass.
- According to a further embodiment the opposing surfaces are not linear but have a substantially rounded development so as to reduce to a minimum the necessity for accurate mating.
- This makes it possible to maintain at the same time a thrust strong enough to obtain an almost irreversible clamping condition when the forces in question are taken into account.
- Moreover, the area of contact between the resisting blocks and the opposing wall may possibly be suitably shaped.
- According to a further embodiment the resisting block cooperates with a screw located in an almost radial position and acting on both the resisting block and the clamping body at the same time.
- Thus, by acting on such screw the two elements are moved towards each other or one of them is moved in a direction opposite to the other, thus constraining the clamping body to thrust the insert downwards and sideways and keeping it in the right position in relation to the seating of the tool.
- According to yet another embodiment the resisting block comprises a slit such that the walls of the block itself are made elastic.
- When a screw is caused to act on such walls, a union substantially with the shape of a truncated cone between the resisting block and the clamping body forces the clamping body itself to move sideways and downwards and thus constrains the insert to be secured perfectly within the seating of the tool.
- The invention provides a rotary tool for high-speed machining of wood, plastics or light metals, comprising a tool holder and a plurality of replaceable cutting inserts, the tool holder having a plurality of housing spaces that widen peripherally in the direction of the centre of the tool holder, each housing space including a stepped seating for an insert in the trailing direction relative to the.normal direction of rotation of the tool: a clamp body located in each housing space and cooperating with means to retain each insert positively in the radially outward direction: at least one resisting block located in each housing space: an adjusting screw for providing movement between each resisting block and its associated clamp body such that by reaction with the walls of the housing space there is produced a thrust in the peripheral direction of the tool holder to constrain the resisting block against an opposing wall of the housing space and to constrain the clamp body against the insert; characterized in that each adjusting screw is operable to cause a separating movement between a said clamp body and at least one said resisting block to produce firstly the said thrust and secondly a component of force directed generally inwardly towards the middle of the tool holder and applied to the insert by means of at least the retaining means so as positively to retain the insert radially against the step of the stepped seating.
- Let us now see some preferred lay-outs of the invention with the help of the attached figures, which give some non-restrictive examples.
- The figures contain the following:-Fig. 1 gives a vertical section of a possible embodiment of the invention;
- Fig. 2 shows the embodiment of Fig. 1 according to a lengthwise section;
- Fig. 3 shows a variant evolved from Fig. 1;
- Fig. 4 shows an evolutive variant of the regulating screw;
- Fig. 5 shows the embodiment of another variant;
- Fig. 6 shows the embodiment of another variant in relation to Fig. 5;
- Figs. 7 and 8 show a section and a side view of another variant.
- With reference to the figures, a
tool holder 10 comprises ahousing space 11 with anopposing wall 12 and a supportingwall 13; alateral seating 14 for a tool is provided in the supportingwall 13. - The
seating 14 for a tool includes a supportingcorner 15 and awall 16 supporting an insert. - The conformation of the
housing 11 substantially like a truncated cone has the effect that, as thewall 16 supporting aninsert 23 is substantially parallel to a plane passing through the axis of thetool holder 10, theopposing wall 12 will cut such plane at a position a great deal above the middle of thetool holder 10. - The
wall 16 supporting the insert and the supporting corner of theseating 14 for a tool are positioned perfectly in relation to the centre of rotation of thetool holder 10. - A
clamping body 17 is introduced within thehousing 11 and, in the example of Fig. 1, comprises a lengthwise hollow 32 in which are located two resisting blocks 18-118 cooperating with a regulatingscrew 19 having a righthand and a lefthand thread. - The regulating or adjusting
screw 19 includes aring 20 for lengthwise anchorage, andsuch ring 20 cooperates with a hollow 21 for lengthwise anchorage formed in the clampingbody 17. - Opposing surfaces 22 are provided in the lengthwise hollow 32 of the
clamping body 17 and cooperate with respective resisting surfaces 122 formed on the resistingblocks 18. - Thus, when the regulating
screw 19 is turned, the resistingblocks 18 are, for instance, drawn towards each other and the respective resisting surfaces 122 press on the opposing surfaces 22 of theclamping body 17. - This pressure constrains the resisting
blocks 18 to move sideways until they rest against theopposing wall 12. - As soon as the resisting
blocks 18 rest against theopposing wall 12, they constrain the clampingbody 17 to move in its turn. - The position of the opposing
wall 12 conditions the characteristics of the movement of the clampingbody 17. - When the clamping
body 17 moves, it acts on theinsert 23 or tool having a re-usable and replaceable tip. - The
tool 23 comprises one ormore holes 24 which cooperate withappropriate pins 25 solidly fixed to theclamping body 17. - Owing to the action of the resisting
blocks 18 against the clampingbody 17 thepin 25 rests against the bottom of thehole 24 and engages theinsert 23. - This action constrains the
insert 23 to rest perfectly against thewall 16 and at the same time against thecorner 15 and to be positioned perfectly in relation to the middle of thetool holder 10 and to the other tools. - The clamping
body 17 is advantageously envisaged as comprising aprotective outlet 26 which cooperates with the cutting edge of theinsert 23 lying against the supportingcorner 15. - So as to prevent the regulating
screw 19, and therefore the resistingblocks 18, from becoming detached possibly from the clampingbody 17 during movement, it is possible to visualize asafety pin 27 which engages the clampingbody 17 and the regulatingscrew 19. - It is possible- to obtain an auxiliary safety function with the
safety pin 27 if such safety pin protrudes from the lower side of thebody 17 and cooperates with the bottom of thehousing 11. - In such a case, if the
safety pin 27 is elastic enough and is made to work by bending against the bottom of thehousing 11, it will constrain the clampingbody 17 with an outward thrust. - This makes it possible to ensure a grip and security which could not be obtained otherwise in the case of imperfect clamping by the resisting
blocks 18. - The
safety pin 27 can be single, as in Fig. 1, or double, as in Fig. 3, or can have other suitable shapes according to the requirements of the design. - According to a variant the
ring 20 providing lengthwise anchorage and comprised in the regulatingscrew 19 can have an intermediate hollow 28 within which thesafety pin 27 is made to lodge; in this way the hollow 21 providing lengthwise anchorage is rendered unnecessary. - The embodiment now shown entails a movement substantially parallel to the axis of rotation of the
tool holder 10. - With the invention, however, it is also possible to obtain clamping of the
inserts 23 by making use of an action of the resistingblocks 218 in a substantially radial direction. - This too is due to the reciprocal disposition of the
wall 12 andwall 13 in relation to the centre of rotation of thetool holder 10. - Indeed, as can be seen in Figs. 5 and 6, a clamping action can be obtained which is in principle substantially the same as that of Fig. 1 but which is substantially different as an embodiment to be applied.
- According to such variants the resisting
block 218 is thrust towards the opposingwall 12 by screw means 119, which also have a righthand and a lefthand thread and which engage the resistingblock 218 and the clampingbody 117 at one and the same time. - In this way the clamping
body 117 is thrust not only towards the supportingwall 13 but also towards theinsert 23 and constrains theinsert 23 to rest against the supportingcorner 15. - The difference between the lay-outs of Figs. 5 and 6 lies substantially in greater security of the invention in the example of Fig. 6.
- In fact, the twofold inclination permits safer and longer-lasting anchorage in the long term even when there are vibrations.
- Indeed, the reciprocal sliding
wall 31 of Fig. 5 is substantially parallel to thewall 13, Whereas there is an angle between such walls in Fig. 6. - In the examples of Figs. 7 and 8 the resisting
block 318 comprises a hollow which enables the two sides A and B of the block itself to bend in relation to each other, whereby the side B is able to lodge thehead 30 of thescrew 230, whereas the side A can lodge the threadedpart 130 thereof. - When the screw 219 is turned, the two sides A and B of the resisting
block 218 tend to come nearer to each other. - This action is opposed by the presence of the
body 217, which is thrust towards theinsert 23, whereas the resistingblock 318 is thrust towards thewall 12, the twooblique sides 131 acting as wedge means. - We have described herein some preferred embodiments, but variants are possible and it can be seen that some embodiments are suitable for wide tools and others for narrow tools, whereas others again are suitable for very narrow tools.
- Thus, the proportions, sizes and parts can be varied and various parts can be combined together according to the invention, within the scope of the claims.
- It is possible to visualize that the opposing surfaces 22-122 are rounded or crown-shaped; it can be envisaged that the sliding
surfaces 31 between thebody 218 andbody 217 may possibly have a special shape, and so forth.
Claims (8)
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
AT82830097T ATE18367T1 (en) | 1981-05-11 | 1982-04-19 | ROTARY TOOL FOR RAPID CUTTING OF WOOD, PLASTICS OR LIGHT ALLOYS. |
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
IT83378/81A IT1147492B (en) | 1981-05-11 | 1981-05-11 | LOCKING MEANS FOR INSERTS IN ROTARY TOOLS |
IT8337881 | 1981-05-11 |
Publications (3)
Publication Number | Publication Date |
---|---|
EP0065496A2 EP0065496A2 (en) | 1982-11-24 |
EP0065496A3 EP0065496A3 (en) | 1983-05-04 |
EP0065496B1 true EP0065496B1 (en) | 1986-03-05 |
Family
ID=11320991
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP82830097A Expired EP0065496B1 (en) | 1981-05-11 | 1982-04-19 | Rotary tool for high speed machining of wood, plastics or light metals |
Country Status (6)
Country | Link |
---|---|
EP (1) | EP0065496B1 (en) |
AT (1) | ATE18367T1 (en) |
DE (1) | DE3269560D1 (en) |
ES (1) | ES274453Y (en) |
IT (1) | IT1147492B (en) |
PT (1) | PT74867B (en) |
Families Citing this family (6)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
IT1181163B (en) * | 1984-02-08 | 1987-09-23 | Stark Spa | INSERTS FIXING SYSTEM IN ROTARY TOOLS |
FR2564028B1 (en) * | 1984-05-10 | 1988-04-15 | Fontaine Bernard | DEVICE FOR FIXING INTERCHANGEABLE BLADES ON TOOL HOLDER OF WOOD MACHINES |
DE3636618A1 (en) * | 1986-10-28 | 1988-05-05 | Babcock Bsh Ag | KNIFE SHAFT |
DE3915479C2 (en) * | 1989-05-11 | 1997-08-14 | Schrammel Helmut | Knife head, in particular for wood and plastic processing machines with at least one knife or the like, which rests on a clamping surface in a recess in the tool carrier |
FR2744659B1 (en) * | 1996-02-08 | 1998-04-30 | Bridonneau Ets | SYSTEM FOR FIXING A PLATE ON A ROTARY CUTTING TOOL |
AT2192U1 (en) * | 1997-07-22 | 1998-06-25 | Aigner Werkzeuge Ges M B H | KNIFE HEAD FOR A MILLING DEVICE |
Family Cites Families (12)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE229751C (en) * | ||||
DE366560C (en) * | 1919-02-15 | 1923-01-06 | Karl Boellert | Knife attachment to knife shafts and knife heads for woodworking |
US1527650A (en) * | 1922-10-26 | 1925-02-24 | James B Hunt | Rotary cutting tool |
GB393669A (en) * | 1931-12-15 | 1933-06-15 | Philip Harris | Improvements relating to wood-working machines |
DE617874C (en) * | 1935-11-20 | 1936-09-05 | Maschb Leya A G | Device for holding the knife in the knife shaft for planing machines |
DE918710C (en) * | 1949-07-26 | 1954-10-04 | Josef Abele | Slot milling disc for woodworking |
DE839556C (en) * | 1950-06-29 | 1952-05-23 | Boettcher & Gessner | Planer knife shaft for woodworking with wedge clamping |
DE858602C (en) * | 1951-07-05 | 1952-12-08 | Heinrich Gensheimer & Soehne M | Safety knife shaft |
DE1111368B (en) * | 1958-03-21 | 1961-07-20 | Rohde & Doerrenberg | Knife attachment by means of wedge effect in cutting tools with exchangeable knives |
GB890427A (en) * | 1959-09-22 | 1962-02-28 | Womersley & Broadbent Ltd | Rotary cutter blocks for the working of wood, metal and other suitable materials |
DE7602409U1 (en) * | 1976-01-29 | 1976-12-09 | Ledermann + Co, 7240 Horb | BUILT-IN BRACKET FOR A CUTTING TOOL |
DE2917079A1 (en) * | 1979-04-27 | 1980-10-30 | Kloeckner Gmbh & Co Geb | Chopper rotor blade fixing - has thread ended shaft with tightening wedges pressing centrifugal wedge to lock blade |
-
1981
- 1981-05-11 IT IT83378/81A patent/IT1147492B/en active
-
1982
- 1982-04-19 AT AT82830097T patent/ATE18367T1/en not_active IP Right Cessation
- 1982-04-19 DE DE8282830097T patent/DE3269560D1/en not_active Expired
- 1982-04-19 EP EP82830097A patent/EP0065496B1/en not_active Expired
- 1982-05-10 ES ES1982274453U patent/ES274453Y/en not_active Expired
- 1982-05-10 PT PT74867A patent/PT74867B/en unknown
Also Published As
Publication number | Publication date |
---|---|
DE3269560D1 (en) | 1986-04-10 |
PT74867B (en) | 1983-11-22 |
PT74867A (en) | 1982-06-01 |
ATE18367T1 (en) | 1986-03-15 |
IT8183378A0 (en) | 1981-05-11 |
IT1147492B (en) | 1986-11-19 |
EP0065496A2 (en) | 1982-11-24 |
EP0065496A3 (en) | 1983-05-04 |
ES274453U (en) | 1984-10-01 |
ES274453Y (en) | 1985-04-01 |
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