CN103056074B - Rolling brush - Google Patents
Rolling brush Download PDFInfo
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- CN103056074B CN103056074B CN201210586943.8A CN201210586943A CN103056074B CN 103056074 B CN103056074 B CN 103056074B CN 201210586943 A CN201210586943 A CN 201210586943A CN 103056074 B CN103056074 B CN 103056074B
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- Prior art keywords
- vertical bar
- groove
- brace
- protecgulum
- strip
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- 238000005096 rolling process Methods 0.000 title abstract 4
- 230000007704 transition Effects 0.000 claims description 12
- 230000000284 resting effect Effects 0.000 claims description 4
- 230000008878 coupling Effects 0.000 claims description 3
- 238000010168 coupling process Methods 0.000 claims description 3
- 238000005859 coupling reaction Methods 0.000 claims description 3
- 238000005516 engineering process Methods 0.000 description 2
- 239000007788 liquid Substances 0.000 description 2
- 238000000034 method Methods 0.000 description 2
- 230000003068 static effect Effects 0.000 description 2
- 230000001680 brushing effect Effects 0.000 description 1
- 239000002360 explosive Substances 0.000 description 1
- 238000010422 painting Methods 0.000 description 1
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- Cleaning In General (AREA)
Abstract
The invention relates to a rolling brush. The rolling brush comprises a brush rod, wherein a plastic wheel for fixing a roller is arranged on the brush rod; the brush rod is divided into a left bracket and a right bracket; the left bracket comprises a first vertical rod and a second vertical rod which are parallel with each other; a first inclined rod is arranged between the first vertical rod and the second vertical rod; the left bracket and the right bracket have the same shape; the left bracket and the right bracket are intersected; and the intersecting point of the left bracket and the right bracket is positioned in the connection position of the second vertical rod and the first inclined rod. The rolling brush also comprises a front cover and a rear cover for fixing the brush rod, wherein a first groove is formed in the front cover; third grooves are formed on the two sides of the first groove; a second groove matched with the first groove is formed in the rear cover; a limiting device is arranged at the lower end of the first groove; reset devices are arranged on the second vertical rod and the fourth vertical rod; and switch devices are arranged at the upper ends of the first groove and the second groove.
Description
Technical field
The present invention relates to a kind of painting tool, particularly relate to a kind of round brush.
Background technology
At present, the round brush of the practical prior art of people is generally brush holder support and is socketed on cylinder, and bristle is attached to the outer surface of cylinder, and brush holder support and cylinder are fixed by nut screw rod.Need round brush to be stained with some liquid during this round brush brushing liquid, be then brushed to required place and go, when cylinder changed by needs, unscrew the screw thread of resting barrel and brush holder support, be inconvenient to like this change cylinder, troublesome poeration.
Summary of the invention
Technical problem to be solved by this invention: a kind of round brush simple, convenient when changing cylinder is provided.
In order to solve the problems of the technologies described above, the present invention is achieved by the following technical solutions: a kind of round brush, it comprises brush holder support, described brush holder support is provided with the plastic wheel for resting barrel, described brush holder support is divided into left socle and right support, described left socle comprises the first vertical bar and the second vertical bar that are parallel to each other, the first brace is provided with between described first vertical bar and the second vertical bar, the described first vertical lower end of bar is connected with one end arc transition of the first brace, the described second vertical upper end of bar is connected with the other end arc transition of the first brace, the lower end of the described first vertical bar is greater than the length of the second vertical bar to the vertical range of the second vertical bar lower end, described right support comprises the 3rd vertical bar and the 4th vertical bar that are parallel to each other, the second brace is provided with between described 3rd vertical bar and the 4th vertical bar, the described 3rd vertical lower end of bar is connected with one end arc transition of the second brace, the described 4th vertical upper end of bar is connected with the other end arc transition of the second brace, the lower end of the described 3rd vertical bar is greater than the length of the 4th vertical bar to the vertical range of the 4th vertical bar lower end, the width of the described second vertical bar is less than the width of the first brace, the width of the described 4th vertical bar is less than the width of the second brace, described left socle and right support are all formed in one, described left socle is identical with right support shape, described left socle intersects with right support, the crosspoint of described left socle and right support is positioned at the junction of the second vertical bar and the first brace, the crosspoint of described left socle and right support is positioned at the junction of the 4th vertical bar and the second brace, it also comprises protecgulum for fixing brush holder support and bonnet, the first groove is provided with in described protecgulum, described first groove both sides are equipped with the 3rd groove, the second groove with the first groove fit is provided with in described bonnet, described second groove both sides are equipped with the 4th groove with the 3rd groove fit, after described protecgulum is connected with bonnet, the first groove and the second groove form the first cavity, described second vertical bar and the 4th vertical bar are positioned at the first cavity, one end of described first brace and one end of the second brace are positioned at the first cavity, described 3rd groove and the 4th groove form the second cavity passed for the first brace and the second brace, the width b of described 3rd groove is greater than the thickness of the first brace, the degree of depth of described 3rd groove is greater than the half of the first brace width, described first groove lower end is provided with stopping means, described second vertical bar and the 4th vertical bar are equipped with resetting means, the upper end of described first groove and the second groove is equipped with switching device.
Adopt said structure, the present invention advantageously: the described second vertical bar and the 4th vertical bar are all positioned at the first groove, and the first groove lower end is provided with stopping means, fixed in one end of left socle and one end of right support; Described left socle intersects with right support, and the second vertical bar and the 4th vertical bar are equipped with resetting means, make the support of brush holder support can get back to original position after opening; The width of described 3rd groove is greater than the thickness of the first brace, the support of brush holder support can be opened, be convenient for changing cylinder, as long as open switching device, the support of round brush is opened, resetted by resetting means after changing cylinder, eliminate the trouble of unscrewing nut screw rod, simple, convenient.
Described first groove lower end is provided with locating dowel, one end of described second vertical bar and one end of the 4th vertical bar all by locating dowel and protecgulum hinged, the thickness that the width b of described 3rd groove is greater than the first brace makes the first brace and the second brace all can swing up and down in the second cavity, one end of described second vertical bar and one end of the 4th vertical bar all can be opened by locating dowel and the hinged brush holder support that makes of protecgulum, structure is simple, easy to operate.
Described second vertical bar and the 4th vertical bar are all socketed with spring, one end of described spring is fixedly connected with each self-corresponding locating dowel respectively, and described spring maintains static, and brush holder support makes spring produce elastic force after opening, be convenient to brush holder support and reply position after replacing cylinder, relatively simple for structure.
Described first groove upper end is provided with strip fixture block and switch underframe, described switch underframe edge is provided with the draw-in groove inserted for strip fixture block, described first groove and the second groove are equipped with for strip fixture block axially across strip through hole, the center line of the projection on protecgulum of the crosspoint of described left socle and right support and strip through hole is on same straight line, described strip through hole extends along protecgulum length direction, described strip fixture block axially runs through protecgulum and bonnet by strip through hole, described strip fixture block slides in strip through hole, described strip fixture block two ends are equipped with switch, described switch end face is provided with the groove inserted for strip fixture block, described strip fixture block is positioned at above the crosspoint of left socle and right support, by pull switch device, strip fixture block is slided in strip through hole, because one end of left socle and right support is all hinged on protecgulum, strip fixture block force left socle and right support all in the second cavity to lower swing, thus brush holder support is opened, change cylinder, structure is simple, easy to operate.
The lower end of described protecgulum and bonnet is respectively equipped with the screw thread of coupling mutually, forms screwed hole after described protecgulum and bonnet grafting, in the process using brush holder support, the height of brush holder support can be lengthened by screwed hole, brush higher position, structure is simple, operates more convenient.
Described plastic wheel respectively bar vertical with first and the second vertical bar is threaded, and install simple, be threaded the size making brush holder support easily change plastic wheel simultaneously, thus meet the requirement of different cylinder.
Accompanying drawing explanation
Fig. 1 is the explosive view of a kind of round brush of the present invention.
Fig. 2 is the structural representation after the bonnet of a kind of round brush of the present invention is opened.
Fig. 3 is the rearview after the bonnet of a kind of round brush of the present invention is opened.
As shown in the figure: 1-left socle, 1.1-first is bar vertically, and 1.2-second is bar vertically, 1.3-the 3rd groove, 2-right support, the vertical bar of 2.1-the 3rd, the vertical bar of 2.2-the 4th, 2.3-the 4th groove, 3-protecgulum, 3.1-first groove, 3.2-the 3rd groove, 4-bonnet, 4.1-second groove, 4.2-the 4th groove, 5-locating dowel, 6-spring, 7-fixture block, 8-switch underframe, 9-switch, 10-strip through hole.
Detailed description of the invention
Below in conjunction with accompanying drawing, the present invention is described further.
A kind of round brush, it comprises brush holder support, described brush holder support is provided with the plastic wheel for resting barrel, described brush holder support is divided into left socle 1 and right support 2, described left socle 1 comprises the first vertical bar 1.1 and the second vertical bar 1.3 be parallel to each other, the first brace 1.2 is provided with between described first vertical bar 1.1 and the second vertical bar 1.3, the lower end of the described first vertical bar 1.1 is connected with one end arc transition of the first brace 1.2, the upper end of the described second vertical bar 1.3 is connected with the other end arc transition of the first brace 1.2, the lower end of the described first vertical bar 1.1 is greater than the length of the second vertical bar 1.3 to the vertical range of the second vertical bar 1.3 lower end, described right support 2 comprises the 3rd vertical bar 2.1 and the 4th vertical bar 2.3 that are parallel to each other, the second brace 2.2 is provided with between described 3rd vertical bar 2.1 and the 4th vertical bar 2.3, the lower end of the described 3rd vertical bar 2.1 is connected with one end arc transition of the second brace 2.2, the upper end of the described 4th vertical bar 2.3 is connected with the other end arc transition of the second brace 2.2, the lower end of the described 3rd vertical bar 2.1 is greater than the length of the 4th vertical bar 2.3 to the vertical range of the 4th vertical bar 2.3 lower end, the width of the described second vertical bar 1.3 is less than the width of the first brace 1.2, the width of the described 4th vertical bar 2.3 is less than the width of the second brace 2.2, described left socle 1 and right support 2 are all formed in one, described left socle 1 is identical with right support 2 shape, described left socle 1 intersects with right support 2, described left socle 1 and the crosspoint of right support 2 are positioned at the junction of the second vertical bar 1.3 and the first brace 1.2, described left socle 1 and the crosspoint of right support 2 are positioned at the junction of the 4th vertical bar 2.3 and the second brace 2.2, it also comprises protecgulum 3 for fixing brush holder support and bonnet 4, the first groove 3.1 is provided with in described protecgulum 3, described first groove 3.1 both sides are equipped with the 3rd groove 3.2, the second groove 4.1 coordinated with the first groove 3.1 is provided with in described bonnet 4, described second groove 4.1 both sides are equipped with the 4th groove 4.2 coordinated with the 3rd groove 3.2, after described protecgulum 3 is connected with bonnet 4, the first groove 3.1 and the second groove 4.1 form the first cavity, described second vertical bar 1.3 and the 4th vertical bar 2.3 are positioned at the first cavity, one end of described first brace 1.2 and one end of the second brace 2.2 are positioned at the first cavity, described 3rd groove 3.2 and the 4th groove 4.2 form the second cavity passed for the first brace 1.2 and the second brace 2.2, the width b of described 3rd groove 3.2 is greater than the thickness of the first brace 1.2, the degree of depth of described 3rd groove 3.2 is greater than the half of the first brace 1.2 width, described first groove 3.1 lower end is provided with stopping means, described second vertical bar 1.3 and the 4th vertical bar 2.3 are equipped with resetting means, the upper end of described first groove 3.1 and the second groove 4.1 is equipped with switching device.
It is be provided with stopping means that described second vertical bar 1.3 and the 4th vertical bar 2.3 are all positioned at the first groove 3.1, first groove 3.1 lower end, is fixed one end of one end of left socle 1 and right support 2; Described left socle 1 intersects with right support 2, and the second vertical bar 1.3 and the 4th vertical bar 2.3 are equipped with resetting means, make the support of brush holder support can get back to original position after opening; The width of described 3rd groove 3.2 is greater than the thickness of the first brace 1.2, the support of brush holder support can be opened, be convenient for changing cylinder, as long as open switching device, the support of round brush is opened, resetted by resetting means after changing cylinder, eliminate the trouble of unscrewing nut screw rod, simple, convenient.
As shown in Figure 1, Figure 2, Figure 3 shows, described first groove 3.1 lower end is provided with locating dowel 5, one end of described second vertical bar 1.3 and one end of the 4th vertical bar 2.3 are all hinged by locating dowel 5 and protecgulum 3, the width b of described 3rd groove 3.2 is greater than the thickness of the first brace 1.2, make the first brace, 1.2 and second brace 2.2 all can swing up and down in the second cavity, one end of described second vertical bar 1.3 and one end of the 4th vertical bar 2.3 all can be opened by locating dowel 5 and the hinged brush holder support that makes of protecgulum 3, structure is simple, easy to operate.
Described second vertical bar 1.3 and the 4th vertical bar 2.3 are all socketed with spring 6, one end of described spring 6 is fixedly connected with each self-corresponding locating dowel 5 respectively, described spring 6 maintains static, brush holder support makes spring 6 produce elastic force after opening, be convenient to brush holder support and reply position after replacing cylinder, relatively simple for structure.
Described first groove 3.1 upper end is provided with strip fixture block 7 and switch underframe 8, described switch underframe 8 edge is provided with the draw-in groove inserted for strip fixture block 7, described first groove 3.1 and the second groove 4.1 are equipped with for strip fixture block 7 axially across strip through hole 10, the center line of the projection on protecgulum 3 of the crosspoint of described left socle 1 and right support 2 and strip through hole 10 is on same straight line, described strip through hole 10 extends along protecgulum 3 length direction, described strip fixture block 7 axially runs through protecgulum 3 and bonnet 4 by strip through hole 10, described strip fixture block 7 slides in strip through hole 10, described strip fixture block 7 two ends are equipped with switch 9, described switch end face is provided with the groove inserted for strip fixture block 7, described strip fixture block 7 is positioned at above the crosspoint of left socle 1 and right support 2, by pull switch device, strip fixture block 7 is slided in strip through hole 10, because one end of left socle 1 and right support 2 is all hinged on protecgulum 3, strip fixture block 7 force left socle 1 and right support 2 all in the second cavity to lower swing, thus brush holder support is opened, be convenient to change cylinder, structure is simple, easy to operate.
The lower end of described protecgulum 3 and bonnet 4 is respectively equipped with the screw thread of coupling mutually, forms screwed hole after described protecgulum 3 and bonnet 4 grafting, in the process using brush holder support, the height of brush holder support can be lengthened by screwed hole, brush higher position, structure is simple, operates more convenient.
Described plastic wheel respectively bar 1.1 vertical with first and the second vertical bar 2.1 is threaded, and structure is simple, and be threaded the size making brush holder support easily change plastic wheel simultaneously, thus meet the requirement of different cylinder.
Be described the present invention and embodiment thereof above, this description does not have restricted, and shown in accompanying drawing is also one of embodiments of the present invention, and actual structure is not limited thereto.If generally speaking those of ordinary skill in the art enlightens by it, when not departing from the invention aim, designing the frame mode similar to this technical scheme and embodiment without creationary, all should protection scope of the present invention be belonged to.
Claims (4)
1. a round brush, it comprises brush holder support, described brush holder support is provided with the plastic wheel for resting barrel, it is characterized in that: described brush holder support is divided into left socle (1) and right support (2), described left socle (1) comprises the first vertical bar (1.1) and the second vertical bar (1.3) that are parallel to each other, the first brace (1.2) is provided with between described first vertical bar (1.1) and the second vertical bar (1.3), the lower end of the described first vertical bar (1.1) is connected with one end arc transition of the first brace (1.2), the upper end of the described second vertical bar (1.3) is connected with the other end arc transition of the first brace (1.2), the lower end of the described first vertical bar (1.1) is greater than the length of the second vertical bar (1.3) to the vertical range of the second vertical bar (1.3) lower end, described right support (2) comprises the 3rd vertical bar (2.1) and the 4th vertical bar (2.3) that are parallel to each other, the second brace (2.2) is provided with between described 3rd vertical bar (2.1) and the 4th vertical bar (2.3), the lower end of the described 3rd vertical bar (2.1) is connected with one end arc transition of the second brace (2.2), the upper end of the described 4th vertical bar (2.3) is connected with the other end arc transition of the second brace (2.2), the lower end of the described 3rd vertical bar (2.1) is greater than the length of the 4th vertical bar (2.3) to the vertical range of the 4th vertical bar (2.3) lower end, the width of the described second vertical bar (1.3) is less than the width of the first brace (1.2), the width of the described 4th vertical bar (2.3) is less than the width of the second brace (2.2), described left socle (1) and right support (2) are all formed in one, described left socle (1) is identical with right support (2) shape, described left socle (1) intersects with right support (2), described left socle (1) is positioned at the junction of the second vertical bar (1.3) and the first brace (1.2) with the crosspoint of right support (2), described left socle (1) is positioned at the junction of the 4th vertical bar (2.3) and the second brace (2.2) with the crosspoint of right support (2), described round brush also comprises protecgulum (3) for fixing brush holder support and bonnet (4), the first groove (3.1) is provided with in described protecgulum (3), described first groove (3.1) both sides are equipped with the 3rd groove (3.2), the second groove (4.1) coordinated with the first groove (3.1) is provided with in described bonnet (4), described second groove (4.1) both sides are equipped with the 4th groove (4.2) coordinated with the 3rd groove (3.2), after described protecgulum (3) is connected with bonnet (4), the first groove (3.1) and the second groove (4.1) form the first cavity, described second vertical bar (1.3) and the 4th vertical bar (2.3) are positioned at the first cavity, one end of described first brace (1.2) and one end of the second brace (2.2) are positioned at the first cavity, described 3rd groove (3.2) and the 4th groove (4.2) form the second cavity passed for the first brace (1.2) and the second brace (2.2), the width b of described 3rd groove (3.2) is greater than the thickness of the first brace (1.2), the degree of depth of described 3rd groove (3.2) is greater than the half of the first brace (1.2) width, described first groove (3.1) lower end is provided with stopping means, described second vertical bar (1.3) and the 4th vertical bar (2.3) are equipped with resetting means, the upper end of described first groove (3.1) and the second groove (4.1) is equipped with switching device,
Described first groove (3.1) lower end is provided with locating dowel (5), and one end of the described second vertical bar (1.3) and one end of the 4th vertical bar (2.3) are all hinged by locating dowel (5) and protecgulum (3);
Described second vertical bar (1.3) and the 4th vertical bar (2.3) are all socketed with spring (6), and one end of described spring (6) is fixedly connected with each self-corresponding locating dowel (5) respectively.
2. a kind of round brush according to claim 1, it is characterized in that: described first groove (3.1) upper end is provided with strip fixture block (7) and switch underframe (8), described switch underframe (8) edge is provided with the draw-in groove inserted for strip fixture block (7), described first groove (3.1) and the second groove (4.1) are equipped with for strip fixture block (7) axially across strip through hole (10), the center line of the projection on protecgulum (3) of the crosspoint of described left socle (1) and right support (2) and strip through hole (10) is on same straight line, described strip through hole (10) extends along protecgulum (3) length direction, described strip fixture block (7) axially runs through protecgulum (3) and bonnet (4) by strip through hole (10), described strip fixture block (7) is slided in strip through hole (10), described strip fixture block (7) two ends are equipped with switch (9), described switch end face is provided with the groove inserted for strip fixture block (7).
3. a kind of round brush according to claim 1, it is characterized in that: the lower end of described protecgulum (3) and bonnet (4) is respectively equipped with the screw thread of coupling mutually, forms screwed hole after described protecgulum (3) and bonnet (4) grafting.
4. a kind of round brush according to claim 1, is characterized in that: described plastic wheel respectively bar (1.1) vertical with first and the second vertical bar (2.1) is threaded.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201210586943.8A CN103056074B (en) | 2012-12-28 | 2012-12-28 | Rolling brush |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201210586943.8A CN103056074B (en) | 2012-12-28 | 2012-12-28 | Rolling brush |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN103056074A CN103056074A (en) | 2013-04-24 |
| CN103056074B true CN103056074B (en) | 2015-04-22 |
Family
ID=48099138
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201210586943.8A Active CN103056074B (en) | 2012-12-28 | 2012-12-28 | Rolling brush |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN103056074B (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP3793749A4 (en) * | 2018-05-14 | 2022-02-09 | True Progression LLC | Universal paint applicator with pivot-arm locking mechanism |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114046022B (en) * | 2021-11-12 | 2023-05-02 | 湖南盛诺装修有限公司 | Wall plastering with telescopic adjusting structure for building construction |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE3606939A1 (en) * | 1986-03-04 | 1987-09-10 | Fritz Deck | Painting roller |
| DE4419672C1 (en) * | 1994-06-07 | 1995-08-17 | Fritz Deck | Painting roller for walls etc. with angled bracket in handle |
| CN1524475A (en) * | 2003-02-27 | 2004-09-01 | 无锡升展五金机电有限公司 | Roller type paint brush structure |
| DE202004014377U1 (en) * | 2003-09-11 | 2005-02-17 | Storch Malerwerkzeuge & Profigeräte GmbH | Roll guide for paint roller brush, comprises bracket with adjustable arms formed by angled parts with cooperating permanent magnet and polarised shoe |
| TWM266763U (en) * | 2004-10-14 | 2005-06-11 | Sheng-Bin Lai | Roller brush |
| CN201172035Y (en) * | 2008-03-27 | 2008-12-31 | 赖升滨 | Roller paint brush-handle with automatic releasing function |
| CN202087495U (en) * | 2011-01-25 | 2011-12-28 | 邬直飞 | Paint brush |
| CN203061393U (en) * | 2012-12-28 | 2013-07-17 | 宁波市鄞州风名工业产品设计有限公司 | Rolling brush |
Family Cites Families (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20040068814A1 (en) * | 2002-10-15 | 2004-04-15 | Pyles Christopher M. | Paint roller apparatus with bar and brush |
| US20070266513A1 (en) * | 2006-05-18 | 2007-11-22 | Halker Nicholas R | Dual mode paint roller |
-
2012
- 2012-12-28 CN CN201210586943.8A patent/CN103056074B/en active Active
Patent Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE3606939A1 (en) * | 1986-03-04 | 1987-09-10 | Fritz Deck | Painting roller |
| DE4419672C1 (en) * | 1994-06-07 | 1995-08-17 | Fritz Deck | Painting roller for walls etc. with angled bracket in handle |
| CN1524475A (en) * | 2003-02-27 | 2004-09-01 | 无锡升展五金机电有限公司 | Roller type paint brush structure |
| DE202004014377U1 (en) * | 2003-09-11 | 2005-02-17 | Storch Malerwerkzeuge & Profigeräte GmbH | Roll guide for paint roller brush, comprises bracket with adjustable arms formed by angled parts with cooperating permanent magnet and polarised shoe |
| TWM266763U (en) * | 2004-10-14 | 2005-06-11 | Sheng-Bin Lai | Roller brush |
| CN201172035Y (en) * | 2008-03-27 | 2008-12-31 | 赖升滨 | Roller paint brush-handle with automatic releasing function |
| CN202087495U (en) * | 2011-01-25 | 2011-12-28 | 邬直飞 | Paint brush |
| CN203061393U (en) * | 2012-12-28 | 2013-07-17 | 宁波市鄞州风名工业产品设计有限公司 | Rolling brush |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP3793749A4 (en) * | 2018-05-14 | 2022-02-09 | True Progression LLC | Universal paint applicator with pivot-arm locking mechanism |
Also Published As
| Publication number | Publication date |
|---|---|
| CN103056074A (en) | 2013-04-24 |
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Inventor after: Zhao Liheng Inventor before: Lu Yusen |
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