CN101357407B - Saw blade clamping device - Google Patents
Saw blade clamping device Download PDFInfo
- Publication number
- CN101357407B CN101357407B CN2007100257788A CN200710025778A CN101357407B CN 101357407 B CN101357407 B CN 101357407B CN 2007100257788 A CN2007100257788 A CN 2007100257788A CN 200710025778 A CN200710025778 A CN 200710025778A CN 101357407 B CN101357407 B CN 101357407B
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- Prior art keywords
- saw blade
- host cavity
- clamping apparatus
- steel ball
- action bars
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- 229910000831 Steel Inorganic materials 0.000 claims abstract description 68
- 239000010959 steel Substances 0.000 claims abstract description 68
- 238000005520 cutting process Methods 0.000 claims abstract description 4
- 230000000694 effects Effects 0.000 claims description 6
- 238000010586 diagram Methods 0.000 description 3
- 238000003825 pressing Methods 0.000 description 3
- 239000012467 final product Substances 0.000 description 2
- 238000004519 manufacturing process Methods 0.000 description 2
- 230000007812 deficiency Effects 0.000 description 1
- 230000009977 dual effect Effects 0.000 description 1
- 238000000034 method Methods 0.000 description 1
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Abstract
The invention discloses a saw blade clamping device (1, 1', 100) which is used for clamping and fixing a saw blade (3, 4) with a stop block on a reciprocating lever (2) for reciprocating cutting. The saw blade clamping device comprises a connecting section (10) connected on the reciprocating lever, a holding cavity (20, 20', 200) used for holding the saw blade and an operating lever (30, 30', 300) arranged on the holding cavity by a pin (28, 28', 280). The operating lever comprises a handle (31, 310) and a cam surface (32, 320). The pin is provided with a pivotal axis Y so as to ensure that the operating lever can rotate along the pivotal axis Y. The saw blade clamping device is characterized in that: the holding cavity is internally provided with a steel ball (26, 260) which is contacted with the cam surface and moves up along the direction vertical to a saw blade plane responding for the action of the cam surface. When being stopped and adapted with the stop block of the saw blade, the saw blade is fastened and fixed corresponding to the reciprocating lever. The device has simple structure and convenient use; the clamping and the quick change of the saw blade can be carried out easily.
Description
Technical field
The invention discloses a kind of saw blade clamping apparatus, particularly a kind of saw blade clamping apparatus that is applicable to sweep-saw and reciprocating saw.
Background technology
Sweep-saw and reciprocating saw are common saw class power tools, mainly are to utilize reciprocating lever to drive saw blade to move reciprocatingly with cut workpiece, and the saw blade here generally is to be fixedly connected on the reciprocating lever by saw blade clamping apparatus.
Such saw blade clamping apparatus has number of different types at present, disclose a kind of saw blade clamping apparatus as Chinese patent CN94103545.X, this clamping device is arranged on the free end of reciprocating lever, its inside is provided with two relative receiving spaces, can produce the steel ball that moves radially and contain in this receiving space.When saw blade is inserted in this saw blade clamping apparatus, the lug of saw blade is crossed steel ball with in the vertical direction, at this moment, the operator rotates this saw blade clamping apparatus, forcing the steel ball that is arranged in receiving space to produce moves radially, and further be resisted against the lower edge of saw blade lug, be able to saw blade is clamped and unlikely coming off.Otherwise when this saw blade clamping apparatus of operator's reverse rotation, steel ball will lose by receiving space and bring its chucking power and can produce mobile that the footpath makes progress, and at this moment, by the spring action that is arranged in reciprocating lever, saw blade will be ejected.
Such structure is not only applicable in the sweep-saw, and has obtained application in the reciprocating saw field yet.As described in U.S. Pat 5575071, a kind of saw blade clamping apparatus of reciprocating saw, it is arranged on the free end of reciprocating lever, and inside has a receiving space that forces steel ball to produce and move radially equally.After this saw blade clamping apparatus rotates, steel ball will be pushed to reciprocating lever inner mobile, and until the fixing hole that falls into the saw blade that is inserted into reciprocating lever inside, thereby blade holder is fastened on reciprocating lever.When needs were changed saw blade, the operator only needed this saw blade clamping apparatus of reverse rotation to get final product.
But above-mentioned dual mode, internal structure are comparatively complicated, and the accuracy of manufacture of having relatively high expectations, thereby are unfavorable for manufacturing.
Another U.S. Pat 6112420 has provided a kind of new solution, a kind of saw blade clamping apparatus, the host cavity that comprises a saw blade, on the base plate of host cavity, be provided with projection, be used for the fixing hole on the buckle connection saw blade, then a pressing plate is arranged on the saw blade, again by a cam handle clamping platen.Like this, saw blade is just by the projection in the host cavity and pressing plate acting in conjunction and be fixedly clamped in this saw blade clamping apparatus.When needing to change saw blade, at first pull the cam handle rotation, then lift pressing plate gently, promptly saw blade can be taken off from the base plate upper protruding block, and take out saw blade.But, though such scheme is simple in structure, need be undertaken by instrument, use comparatively inconvenience.
For this reason, prior art is necessary further improvement in fact.
Summary of the invention
The present invention is directed to the deficiencies in the prior art, purpose is to provide saw blade clamping apparatus a kind of simple in structure, easy to use.
The object of the present invention is achieved like this: a kind of saw blade clamping apparatus, be applicable to that the blade holder that will have retainer is tightly fixed on the work of back and forth cutting on the reciprocating lever, described saw blade clamping apparatus comprises the connecting portion that is connected on the reciprocating lever, be used to accommodate the host cavity of saw blade, and be arranged on action bars on the host cavity by a pin, described action bars further comprises handle and cam surface, described pin has a pivot axis Y, described action bars can be rotated around pivot axis Y, described host cavity also has top board, the axis X that is parallel to pivot axis Y in described top board upper edge is furnished with two holes, also be provided with two steel balls in the described host cavity, each described steel ball is corresponding with a described hole, and described steel ball contacts with cam surface, and be subjected to the cam surface effect and along perpendicular to moving on the direction on saw blade plane of living in, when the retainer backstop with saw blade connected, saw blade was locked with respect to reciprocating lever.
As to one of improvement of the technical scheme, the retainer of described saw blade is a lug, and when saw blade was locked with respect to reciprocating lever, described steel ball was resisted against the lower edge of lug; Described host cavity comprises a base plate, from base plate relatively two steel balls in two side of extending of dual-side between the base plate of each self-corresponding hole and host cavity; The diameter of described hole and steel ball is suitable, and steel ball is moved along the hole; Extension is provided with a bracing frame on the top board of described host cavity, and described action bars is installed on the bracing frame by the torsion spring that is located in the pin on the bracing frame and be set on the pin; The fixedly connected host cavity of one end of described torsion spring, the then fixedly connected action bars of the other end; Corresponding steel ball also is provided with arc groove on the cam surface of described action bars.
As to two of improvement of the technical scheme, the retainer of described saw blade is a lug, and when saw blade was locked with respect to reciprocating lever, described steel ball was resisted against the lower edge of lug; Described host cavity comprises a base plate, from the base plate dual-side two side of extending and with respect to a top board of base plate relatively, offers two holes on top board, corresponding these two holes, and two steel balls are between the base plate of each self-corresponding hole and host cavity; The diameter of described hole and steel ball is suitable, and steel ball is moved along the hole; Described two holes are arranged along the axis X that is parallel to pivot axis Y; Extend the two side of described host cavity pair of supporting, and described action bars is installed on the bracing frame by the torsion spring that is located in the pin on the bracing frame and be set on the pin; One end of described torsion spring is fixedly connected on the bracing frame, and the other end then is fixedly connected on the action bars; Corresponding steel ball also is provided with arc groove on the cam surface of described action bars.
As to three of improvement of the technical scheme, the retainer of described saw blade is a fixing hole, and when saw blade was locked with respect to reciprocating lever, described steel ball fell into fixing hole; The afterbody of described host cavity and saw blade adapts, and only on the top board of host cavity, is provided with a hole, and described steel ball is corresponding with the hole; The diameter of described hole and steel ball is suitable, and steel ball is moved along the hole; Also be provided with bracing frame on the top board of described host cavity, described action bars is installed on the bracing frame by the torsion spring that is located in the pin on the bracing frame and be set on the pin; The pivot axis Y of described pin is parallel to the direction that saw blade inserts host cavity.
Compared with prior art, helpfulness effect of the present invention is:
The present invention compresses steel ball by cam handle, relends with the retainer on steel ball and the saw blade to connect with the moving of restriction saw blade, thereby blade holder is fastened on reciprocating lever.Such mode makes the present invention simple in structure, and easy to use, is easy to carry out the clamping quick change of saw blade.
Description of drawings
Below in conjunction with drawings and the specific embodiments the present invention is described in further detail.
Fig. 1 is the schematic diagram of the embodiment of the invention one;
Fig. 2 is A-A view of Fig. 1;
Fig. 3 is B-B view of Fig. 1;
Fig. 4 is the user mode reference diagram of embodiment one;
Fig. 5 is C-C view of Fig. 4;
Fig. 6 is the schematic diagram of the embodiment of the invention two;
Fig. 7 is the stereogram of the embodiment of the invention three;
Wherein, the related elements reference numeral is listed as follows:
1,1 '-saw blade clamping apparatus; 2-reciprocating lever; 3-jig saw blade; 301-sawtooth portion; 302-afterbody; 303-lug; The saw blade of 4-reciprocating saw; 401-sawtooth portion; 402-afterbody; 403-fixing hole; 404-guide portion; 10-connecting portion; 20,20 '-host cavity; 21-base plate; 22,23-sidewall; 24-top board; 25-hole; 26-steel ball; 27,27 '-bracing frame; 28,28 '-pin; 29,29 '-torsion spring; 30,30 '-action bars; 31-handle; 32-cam surface; 33-arc groove; 100-saw blade clamping apparatus; 200-host cavity; 240-top board; 250-hole; 260-steel ball; 270-bracing frame; 280-pin; 290-torsion spring; 300-action bars; 310-handle; 320-cam surface.
The specific embodiment
Fig. 1 to Fig. 5 has disclosed the first embodiment of the present invention, here to be applicable to that the jig saw blade clamping device is that specific embodiment describes.
See also Fig. 1, the invention discloses a kind of saw blade clamping apparatus 1, its be installed in sweep-saw vertically on the free end of the reciprocating lever 2 that moves reciprocatingly, one saw blade 3 is gripped by this saw blade clamping apparatus 1, under the motor driving of (figure does not show), reciprocating lever 2 drives saw blades 3 and does reciprocating motion on the vertical direction, thereby makes the saw blade 3 can cut workpiece.
Need to prove that the saw blade 3 that is adopted is the standard blade of industry here, comprise sawtooth portion 301, afterbody 302 and the lug 303 that extends along the relative dual-side in saw blade 3 planes of living in.
See also Fig. 2 and Fig. 3,, comprise the connecting portion 10 on the free end that is socketed in reciprocating lever 2 and be used to accommodate the host cavity 20 of saw blade 3, and be arranged on the action bars 30 on the host cavity 20 by the saw blade clamping apparatus 1 of the fixedly connected reciprocating lever 2 of lock pin.As shown in Figure 3, host cavity 20 is by a base plate 21, from the base plate 21 dual-side two side 22,23 of extending relatively, constitutes with respect to a top board 24 of base plate 21.Like this, host cavity 20 integral body just form the chamber of a perforation, and the opening of its perforation is then over against the inside of reciprocating lever 2, thereby the opening of saw blade 3 along this perforation can be inserted, and promptly insert along the direction of a shown in Fig. 1, and extend in the reciprocating lever 2 always.Please continue to consult Fig. 2 and Fig. 3, on top board 24, offer two holes of arranging along an axis X 25.Corresponding these 25, two steel balls 26 in two holes also are housed in this host cavity 20, and promptly two steel balls 26 are between the base plate 21 of each self-corresponding hole 25 and host cavity 20.Here, hole 25 is suitable with the diameter of steel ball 26, and steel ball 26 25 is moved along the hole.
Between two holes 25, extension is provided with a bracing frame 27 on this top board 24.Action bars 30 is installed on the bracing frame 27 by a pin 28 and a torsion spring 29.This action bars 30 comprises handle 31 and cam surface 32, and this cam surface 32 contacts with steel ball 26.This pin 28 has a pivot axis Y, and axis X is parallel to pivot axis Y.The fixedly connected host cavity 20 of one end of this torsion spring 29, the then fixedly connected action bars 30 of the other end rotates thereby make action bars 30 can overcome the elastic force effect of torsion spring 29 and center on pivotal axis Y.In addition, corresponding two steel balls 26 are provided with arc groove 33 on cam surface 32.Because the cam surface 32 on the action bars 30, make this cam surface 32 and the contact portion of steel ball 26 form at least one high position and low level, on a described high position, steel ball 26 is bigger with the distance of pivot axis Y, and on described low level, steel ball 26 is relative with the distance of pivot axis Y less.
Above-mentionedly be the concrete structure of saw blade clamping apparatus 1 of the present invention, saw blade 3 is used to be fixedly clamped.Under the nature, when promptly saw blade 3 also was not fixedly clamped by this saw blade clamping apparatus 1, the high position of cam surface 32 was resisted against moving with restriction steel ball 26 on the steel ball 26.See also Fig. 4 to Fig. 5, when needs installings saw blade 3, the operator at first pulls the elastic force that action bars 30 overcomes torsion spring 29 and rotates around pivot axis Y.At this moment, cam surface 32 also will gradually become low level by a high position with the contact site of steel ball 26, and reserve the activity space of steel ball 26.Then, the operator inserts saw blade 3 along the opening of host cavity 20, and the afterbody 302 of saw blade 3 is deep in the reciprocating lever 2, and the lug 303 of saw blade 3 will promote steel ball 26 and move along the hole on the host cavity 20 25, be inserted into suitable position until saw blade 3.So-called suitable position is meant that lug 303 in the vertical directions of saw blade 3 have crossed steel ball 26.At this moment, operator's unclamp operation bar 30, action bars 30 will rotate back to initial position under the effect of torsion spring 29, to be cam surface 32 with the contact portion of steel ball 26 become again gradually from low level again is a high position, and further compressing steel ball 26 towards perpendicular to moving on the direction on saw blade plane of living in, the lower edge of the lug 303 of final and saw blade 3 is abutted together.Because the lug 303 of saw blade 3 is limited by steel ball 26, saw blade 3 is fixed and can not be broken away from host cavity 20.Like this, saw blade 3 will be fixed to clamp free end at reciprocating lever 2 by this saw blade clamping apparatus 1, and then can be to operations such as workpiece cut.
Change saw blade 3 if desired, the operator only need pull action bars 30 and rotate around pivot axis Y, make the cam surface 32 and the contact site of steel ball 26 become low level by a high position, and reserve the space that steel ball 26 can move, the operator outwards pulls out saw blade 3 along host cavity 20 again.Because steel ball 26 can move along the hole on the host cavity 20 25, can not limit moving of saw blade 3 again, so the operator only needs slightly firmly promptly saw blade 3 to be pulled out, then change operations such as saw blade again.
Simultaneously, because this saw blade clamping apparatus 1 has adopted the design of host cavity 20, can allow the saw blade 3 of different-thickness to install.When the saw blade 3 with different-thickness is inserted in the host cavity 20, along with the operator pulls action bars 30 rotations, the diverse location of cam surface 32 all can adapt to the saw blade 3 of these different-thickness, and, on cam surface 32, also be provided with arc groove 33 at steel ball 26, that is to say, here arc groove 33 can provide maximum cam low level, makes steel ball 26 can obtain maximum mobile space, thereby also makes this host cavity 20 can accommodate the saw blade 3 of clamping maximum ga(u)ge.
Fig. 6 has disclosed the second embodiment of the present invention, here still to be applicable to that the jig saw blade clamping device is that specific embodiment describes.Be not both with first embodiment, the action bars 30 ' of the saw blade clamping apparatus 1 ' here is by the bracing frame 27 ' fixed support that extends along the two side 22,23 of host cavity 20, be that action bars 30 ' is installed on the bracing frame 27 ' by pin 28 ' and the torsion spring 29 ' that is located on the bracing frame 27 ', torsion spring 29 ' one end is fixedly connected on the bracing frame 27 ', and the other end then is fixedly connected on the action bars 30 '.Like this, the operator still can be by pulling action bars 30 ', and make cam surface compress steel ball 26 and further clamping saw blades 3.
Because in the present embodiment, action bars 30 ' supports two bracing frames 27 ' that are set in the present embodiment by a bracing frame among the embodiment one 27, its stability is good than embodiment one.
Fig. 7 has disclosed the third embodiment of the present invention, is that specific embodiment describes with the saw blade clamping apparatus that is applicable to reciprocating saw here.Need to prove that there is some difference with jig saw blade 3 for the saw blade of reciprocating saw 4, its size is bigger and thicker, does not therefore have the lug that extends along both sides, saw blade plane.The saw blade 4 of the reciprocating saw of standard generally includes sawtooth portion 401, afterbody 402, the fixing hole 403 that wears on afterbody 402 and the guide portion 404 of extending along blade direction.
Saw blade clamping apparatus 100 in the present embodiment is fixedly connected on the reciprocating lever (figure does not show) by lock pin, comprise a host cavity 200 and the action bars 300 that is positioned on the host cavity 200, this host cavity 200 adapts with the afterbody 402 of saw blade 4, only on the top board 240 of host cavity 200, be provided with a hole 250, to should hole 250, contain steel ball 260 in the host cavity 200.When saw blade 4 was inserted in the host cavity 200, this hole 250 was corresponding with fixing hole 403 on the saw blade 4, and makes steel ball 260 can fall into this fixing hole 403.On the top board 240 of host cavity 200, also be provided with bracing frame 270, one action bars 300 and be installed on the bracing frame 270 by pin 280 and torsion spring 290.Need to prove that the pivot axis Y of the pin 280 here is parallel to the direction that saw blade 4 inserts host cavity 200, i.e. a direction shown in Fig. 7.In addition, this action bars 300 is identical with action bars 30 among the embodiment one, has handle 310 and cam surface 320 equally.
The operating process of this saw blade clamping apparatus 100 is similar to saw blade clamping apparatus 1 among the embodiment one, all be the operator by pulling action bars 300, make cam surface 320 compress steel ball 260, and steel ball 260 moved towards saw blade 4 residing planes.Here, steel ball 260 will move along the hole on the host cavity 200 250, in the fixing hole 403 on falling into saw blade 4, thereby saw blade 4 will be fixedly clamped.Like this, saw blade 4 just can carry out cutting operation to workpiece under the reciprocating motion of reciprocating lever.
If change saw blade 4, the operator only need pull action bars 300 rotations, makes cam surface 320 discharge the mobile space of steel balls 260, and the operator outwards pulls out saw blade 4 and gets final product then.
In above-mentioned two embodiment, all adopted the steel ball that will be arranged in the host cavity to compress mobile to saw blade plane of living in by cam-operated bar, thereby with the retainer on steel ball and the saw blade (is lug in the sweep-saw, be fixing hole in the reciprocating saw) connect locking to be fixedly clamped saw blade, such embodiment is simple in structure, and the handled easily person uses.
Claims (9)
1. saw blade clamping apparatus, be applicable to that the blade holder that will have retainer is tightly fixed on the work of back and forth cutting on the reciprocating lever, described saw blade clamping apparatus comprises the connecting portion that is connected on the reciprocating lever, be used to accommodate the host cavity of saw blade, and be arranged on action bars on the host cavity by a pin, described action bars further comprises handle and cam surface, described pin has a pivot axis Y, described action bars can be rotated around pivot axis Y, it is characterized in that: described host cavity also has top board, the axis X that is parallel to pivot axis Y in described top board upper edge is furnished with two holes, also be provided with two steel balls in the described host cavity, each described steel ball is corresponding with a described hole, and described steel ball contacts with cam surface, and be subjected to the cam surface effect and along perpendicular to moving on the direction on saw blade plane of living in, when the retainer backstop with saw blade connected, saw blade was locked with respect to reciprocating lever.
2. saw blade clamping apparatus as claimed in claim 1 is characterized in that: the retainer of described saw blade is a lug, and when saw blade was locked with respect to reciprocating lever, described steel ball was resisted against the lower edge of lug.
3. saw blade clamping apparatus as claimed in claim 2 is characterized in that: described host cavity comprises a base plate, from base plate relatively two steel balls in two side of extending of dual-side between the base plate of each self-corresponding hole and host cavity.
4. saw blade clamping apparatus as claimed in claim 3 is characterized in that: the diameter of described hole and steel ball is suitable, and steel ball is moved along the hole.
5. saw blade clamping apparatus as claimed in claim 4 is characterized in that: extension is provided with a bracing frame on the top board of described host cavity, and described action bars is installed on the bracing frame by the torsion spring that is located in the pin on the bracing frame and be set on the pin.
6. saw blade clamping apparatus as claimed in claim 5 is characterized in that: the fixedly connected host cavity of an end of described torsion spring, the then fixedly connected action bars of the other end.
7. saw blade clamping apparatus as claimed in claim 4 is characterized in that: extend the two side of described host cavity pair of supporting, and described action bars is installed on the bracing frame by the torsion spring that is located in the pin on the bracing frame and be set on the pin.
8. saw blade clamping apparatus as claimed in claim 7 is characterized in that: an end of described torsion spring is fixedly connected on the bracing frame, and the other end then is fixedly connected on the action bars.
9. as claim 6 or 8 described saw blade clamping apparatus, it is characterized in that: corresponding steel ball also is provided with arc groove on the cam surface of described action bars.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2007100257788A CN101357407B (en) | 2007-08-01 | 2007-08-01 | Saw blade clamping device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2007100257788A CN101357407B (en) | 2007-08-01 | 2007-08-01 | Saw blade clamping device |
Related Child Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2010105392650A Division CN102000881B (en) | 2007-08-01 | 2007-08-01 | Saw blade clamping device |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN101357407A CN101357407A (en) | 2009-02-04 |
| CN101357407B true CN101357407B (en) | 2011-12-07 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2007100257788A Expired - Fee Related CN101357407B (en) | 2007-08-01 | 2007-08-01 | Saw blade clamping device |
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| Country | Link |
|---|---|
| CN (1) | CN101357407B (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102699434A (en) * | 2012-06-15 | 2012-10-03 | 宁波黑松工具有限公司 | Quick assembly and disassembly structure for saw blade of reciprocating saw |
Families Citing this family (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103862106B (en) * | 2012-12-14 | 2016-08-03 | 苏州宝时得电动工具有限公司 | Saw blade clamping apparatus |
| PT3077144T (en) | 2013-12-02 | 2020-03-31 | Rosjoh Pty Ltd | Method, system and device for changing of cutting tools |
| CN104173091B (en) * | 2014-08-21 | 2016-08-24 | 舒捷医疗科技（苏州）有限公司 | The chuck structure of medical saw |
-
2007
- 2007-08-01 CN CN2007100257788A patent/CN101357407B/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102699434A (en) * | 2012-06-15 | 2012-10-03 | 宁波黑松工具有限公司 | Quick assembly and disassembly structure for saw blade of reciprocating saw |
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| Publication number | Publication date |
|---|---|
| CN101357407A (en) | 2009-02-04 |
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Assignee: POSITEC MACHINERY (CHINA) Co.,Ltd. Assignor: POSITEC POWER TOOLS (SUZHOU) Co.,Ltd. Contract record no.: 2012320010029 Denomination of invention: Saw blade clamp device for a reciprocating saw Granted publication date: 20111207 License type: Exclusive License Open date: 20090204 Record date: 20120307 |
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| CF01 | Termination of patent right due to non-payment of annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20111207 |