CN112025275A - Equipment for stably assembling screwdriver - Google Patents
Equipment for stably assembling screwdriver Download PDFInfo
- Publication number
- CN112025275A CN112025275A CN202010873441.8A CN202010873441A CN112025275A CN 112025275 A CN112025275 A CN 112025275A CN 202010873441 A CN202010873441 A CN 202010873441A CN 112025275 A CN112025275 A CN 112025275A
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- rack
- screwdriver
- base
- sliding
- plate
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23P—METAL-WORKING NOT OTHERWISE PROVIDED FOR; COMBINED OPERATIONS; UNIVERSAL MACHINE TOOLS
- B23P19/00—Machines for simply fitting together or separating metal parts or objects, or metal and non-metal parts, whether or not involving some deformation; Tools or devices therefor so far as not provided for in other classes
- B23P19/04—Machines for simply fitting together or separating metal parts or objects, or metal and non-metal parts, whether or not involving some deformation; Tools or devices therefor so far as not provided for in other classes for assembling or disassembling parts
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Automatic Assembly (AREA)
Abstract
The invention relates to an assembling device, in particular to a device for stably assembling a screwdriver. The technical problem to be solved is to provide a device for stably assembling a screwdriver, which can efficiently assemble the screwdriver and can ensure that the screwdriver and a screwdriver handle can be tightly combined together. An apparatus for the secure assembly of a screwdriver comprising: the servo motor is arranged on one side of the top of the base; the first supporting plate is fixedly connected to one side, far away from the servo motor, of the top of the base; the first supporting rods are symmetrically and fixedly connected to one side, close to the top of the base, of the first supporting plate. The screwdriver assembling device has the advantages that the screwdriver can be assembled efficiently, and the screwdriver handle can be tightly combined together.
Description
Technical Field
The invention relates to an assembling device, in particular to a device for stably assembling a screwdriver.
Background
The screwdriver is used for screwing the screw and fixing an object, one end of the screwdriver is provided with a thin wedge-shaped head which can be inserted into a groove at the top of the screw, and the working principle of a lever is applied, so that labor can be saved when the screw is screwed.
At present, when a screwdriver is assembled, people usually assemble the screwdriver manually, one hand of people holds the screwdriver, the other hand holds the screwdriver handle, the screwdriver is inserted into the screwdriver handle, the screwdriver handle can be tightly connected, however, the manual assembly efficiency of the screwdriver is very low, the screwdriver needs the strength of the hands of people to be combined together, and the screwdriver is possibly not firm enough.
Disclosure of Invention
In order to overcome the defects that the efficiency of assembling a screwdriver is low and the screwdriver is assembled by the strength of people, which may cause the screwdriver not to be firm enough in the prior art, the technical problems to be solved are as follows: the equipment for stably assembling the screwdriver is capable of efficiently assembling the screwdriver and ensuring that the screwdriver and a screwdriver handle can be tightly combined together.
The technical scheme is as follows: an apparatus for the secure assembly of a screwdriver comprising: the servo motor is arranged on one side of the top of the base; the first supporting plate is fixedly connected to one side, far away from the servo motor, of the top of the base; the first supporting rods are symmetrically and fixedly connected to one side, close to the first supporting plate, of the top of the base; the first material box is arranged between one sides of the tops of the first supporting rods; the second material box is arranged between the other sides of the tops of the first supporting rods; the clamping mechanism is arranged in the middle of the top of the base; the pushing mechanism is arranged on the first supporting plate; the transmission assembly is connected between the pushing mechanism and the clamping mechanism; the supporting plate is fixedly connected to the lower side of the first material box.
As a preferable aspect of the present invention, the clamping mechanism includes: a first bearing seat mounted intermediate the base top; the first rotating shaft is rotatably arranged in the first bearing seat; the first gear lack is welded on the first rotating shaft; the first sliding rail is arranged in the middle of the top of the base; the first rack is arranged on the first sliding rail in a sliding mode and meshed with the first gear lacking wheel; the mounting seat is fixedly connected to the middle of the top of the base; the mounting shaft is connected to the mounting seat; the shaft sleeve is arranged on the mounting shaft in a sliding mode and is fixedly connected with the first rack; the first spring is connected between the shaft sleeve and the mounting seat; the connecting plates are hinged to two sides of the shaft sleeve; the lower parts of the connecting plates are hinged with the rotating rods; the clamping blocks are rotatably arranged at the upper parts of the rotating rods; the lower parts of the rotating rods are hinged with the sliding rods, and the sliding rods are connected with the mounting seats in a sliding manner; the second supporting plate is fixedly connected to one side of the top of the base; the second rack is slidably arranged on the second supporting plate and is meshed with the first gear lacking wheel; a fourth spring connected between the second rack and the second support plate; the second wedge-shaped block is arranged in the second rack in a sliding mode and is in matched contact with the first rack; a fifth spring connected between the second wedge and the second rack.
As a preferred technical scheme of the invention, the material pushing mechanism comprises: the second rotating shaft is rotatably arranged on the first supporting plate, and the transmission assembly is connected between the second rotating shaft and the first rotating shaft; the second gear lack is welded on the second rotating shaft; the third rotating shaft is rotatably arranged on the upper part of the first supporting plate; the full gear is welded on the third rotating shaft and meshed with the second missing gear; the grooved drum is connected to the middle part of the third rotating shaft; the second sliding rail is arranged on the upper part of the first supporting plate; the sliding plate is arranged in the second sliding rail in a sliding mode, the upper portion of the sliding plate is located in the first material box, and the lower portion of the sliding plate is connected with the groove barrel in a sliding mode.
As a preferred embodiment of the present invention, the present invention further comprises: the ejection plate is fixedly connected to the upper side of the first rack; the second supporting rod is fixedly connected to one side of the top of the base; the third sliding rail is arranged at the upper part of the second supporting rod; the first wedge-shaped block is arranged on the third slide rail in a sliding mode and is in matched contact with the ejector plate; and the third spring is connected between the first wedge block and the third slide rail.
As a preferable technical solution of the present invention, the first material box and the second material box are both connected to the first support rod by bolts.
Has the advantages that: the screwdriver has the advantages that the screwdriver can be efficiently assembled, the screwdriver handle can be tightly combined with the screwdriver handle, and the screwdriver can be stably assembled.
Drawings
Fig. 1 is a schematic perspective view of the present invention.
FIG. 2 is a schematic view of a first partial body structure according to the present invention.
Fig. 3 is a schematic view of a partial explosion in perspective structure according to the present invention.
FIG. 4 is a schematic view of a second partial body structure according to the present invention.
Fig. 5 is a perspective view of a third embodiment of the present invention.
Fig. 6 is a perspective view of a fourth embodiment of the present invention.
Labeled as: a base, 2.. a servomotor, 3.. a clamping mechanism, 30.. a first bearing block, 31.. a first rotating shaft, 32.. a first missing gear, 33.. a first sliding rail, 34.. a first rack, 35.. a mounting seat, 36.. a mounting shaft, 37.. a shaft sleeve, 38.. a connecting plate, 39.. a rotating rod, 310.. a clamping block, 311.. a sliding rod, 312.. a first spring, 4.. a transmission assembly, 5.. a first supporting plate, 6.. a first supporting rod, 7.. a first bin, 8.. a second bin, 9.. a pushing mechanism, 90.. a second rotating shaft, 91.. a second missing gear, 92.. a third rotating shaft, 93.. a gear sliding plate, 94.. a sliding rail, 96.. a second sliding rail, a knock-out plate, 12.. a second support bar, 13.. a third slide rail, 14.. a first wedge block, 15.. a third spring, 16.. a second support plate, 17.. a fourth spring, 18.. a second rack, 19.. a second wedge block, 20.. a fifth spring.
Detailed Description
The invention is described in further detail below with reference to the drawings and the detailed description, but the invention is not limited to the scope of protection and application.
Example 1
The utility model provides an equipment for screwdriver firm assembly, as shown in fig. 1-6, including base 1, servo motor 2, clamping mechanism 3, transmission assembly 4, first backup pad 5, first bracing piece 6, first workbin 7, second workbin 8, pushing equipment 9 and layer board 10, servo motor 2 is installed on base 1 top right side, base 1 top left side fixedly connected with first backup pad 5, base 1 top left side front and back symmetry fixedly connected with first bracing piece 6, be connected with first workbin 7 between the first bracing piece 6 right part, be connected with second workbin 8 between the first bracing piece 6 left part, be equipped with clamping mechanism 3 in the middle of base 1 top, be equipped with pushing equipment 9 on first backup pad 5, be connected with transmission assembly 4 between pushing equipment 9 and the clamping mechanism 3, first workbin 7 right part lower side fixedly connected with layer board 10.
The clamping mechanism 3 comprises a first bearing seat 30, a first rotating shaft 31, a first gear lacking 32, a first sliding rail 33, a first rack 34, an installation seat 35, an installation shaft 36, a shaft sleeve 37, a connecting plate 38, a rotating rod 39, a clamping block 310, a sliding rod 311, a first spring 312, a second supporting plate 16, a fourth spring 17, a second rack 18, a second wedge-shaped block 19 and a fifth spring 20, wherein the first bearing seat 30 is installed in the middle of the top of the base 1, the first rotating shaft 31 is rotatably arranged on the first bearing seat 30, the first gear lacking 32 is welded on the first rotating shaft 31, the first sliding rail 33 is installed in the middle of the top of the base 1, the first rack 34 is slidably arranged on the first sliding rail 33, the first rack 34 is meshed with the first gear lacking 32, the installation seat 35 is fixedly connected to the middle of the top of the base 1, the installation seat 35 is positioned on the left side of the first sliding rail 33, the installation shaft 36 is connected to the installation, the shaft sleeve 37 is fixedly connected with the first rack 34, a first spring 312 is connected between the shaft sleeve 37 and the mounting seat 35, the front side and the rear side of the shaft sleeve 37 are respectively hinged with a connecting plate 38, the lower portion of the connecting plate 38 is respectively hinged with a rotating rod 39, the lower portion of the rotating rod 39 is respectively hinged with a sliding rod 311, the sliding rod 311 is respectively connected with the mounting seat 35 in a sliding manner, the upper portion of the rotating rod 39 is respectively and rotatably provided with a clamping block 310, the front side of the top of the base 1 is fixedly connected with a second supporting plate 16, the second supporting plate 16 is slidably provided with a second wedge 18, the second wedge 18 is meshed with the first gear lacking 32, a fourth spring 17 is connected between the second rack 18 and the second supporting plate 16, the second wedge 18 is internally slidably provided with a second wedge 19, a fifth spring 20 is connected between the second wedge 19 and the second rack 18.
The material pushing mechanism 9 comprises a second rotating shaft 90, a second lacking gear 91, a full gear 93, a third rotating shaft 92, a groove drum 94, a second sliding rail 95 and a sliding plate 96, the right part of the first supporting plate 5 is rotatably provided with the second rotating shaft 90, the second lacking gear 91 is welded on the second rotating shaft 90, a transmission component 4 is connected between the second rotating shaft 90 and the first rotating shaft 31, the left part of the first supporting plate 5 is rotatably provided with the third rotating shaft 92, the right end of the third rotating shaft 92 is welded with the full gear 93, the full gear 93 is meshed with the second lacking gear 91, the middle part of the third rotating shaft 92 is connected with the groove drum 94, the second sliding rail 95 is installed on the upper part of the first supporting plate 5, the sliding plate 96 is arranged in the second sliding rail 95, the upper part of the sliding plate 96 is located in the first material box 7, and the.
When people need to assemble the screwdriver, firstly, a proper amount of screwdriver is placed in the second material box 8, a proper amount of screwdriver handle is placed in the first material box 7, then the servo motor 2 is started, the clamping mechanism 3 is driven to operate, the screwdriver handle at the bottom end of the first material box 7 is clamped, the material pushing mechanism 9 is driven to operate through the transmission assembly 4, the screwdriver in the second material box 8 is pushed to the screwdriver handle, the screwdriver is inserted into the screwdriver handle, then people take out the assembled screwdriver, and finally the servo motor 2 is closed.
When people need to clamp the screwdriver handle through the clamping mechanism 3, the output shaft of the servo motor 2 can drive the first rotating shaft 31 and the first gear rack 32 to rotate anticlockwise, the first gear rack 32 is in contact with the first gear rack 34 and can drive the first gear rack 34 to move downwards, so as to drive the shaft sleeve 37 to move downwards, the first spring 312 is compressed, the shaft sleeve 37 moves downwards and can drive the upper parts of the rotating rods 39 on the front side and the rear side to move inwards through the connecting plate 38, so as to drive the clamping block 310 to move inwards and clamp the screwdriver handle, when the first gear rack 34 moves downwards to a certain position, under the action of the fifth spring 20, the second wedge-shaped block 19 can move backwards and can be clamped into the clamping groove of the first gear rack 34, so as to clamp the first gear rack 34, when the first gear rack 32 rotates to be meshed with the second gear rack 18, the second gear rack 18 can be pushed forwards, and the fourth spring 17 is compressed, therefore, the second wedge block 19 is driven to move forwards, the second wedge block 19 can move out of the clamping groove in the first rack 34 and does not clamp the first rack 34, the shaft sleeve 37 and the first rack 34 can move upwards to reset under the action of the first spring 312, the rotating rod 39 and the clamping block 310 are driven to reset, the screwdriver handle is not clamped any more, the clamping block 310 can clamp the screwdriver handle for a period of time, and the screwdriver can be inserted into the screwdriver handle by the material pushing mechanism 9.
When people need to insert the screwdriver into the screwdriver handle through the pushing mechanism 9, the first rotating shaft 31 rotates anticlockwise to drive the second rotating shaft 90 and the second gear 91 to rotate anticlockwise continuously through the transmission assembly 4, when the second gear 91 rotates to be meshed with the full gear 93, the third rotating shaft 92 and the groove cylinder 94 are driven to rotate clockwise, the sliding plate 96 can slide continuously in the groove cylinder 94, the groove cylinder 94 rotates to drive the sliding plate 96 to move left and right, when the sliding plate 96 moves right, the screwdriver is pushed to the screwdriver handle, the screwdriver handle can be clamped by the clamping block 310 at the moment, the screwdriver handle can be tightly combined together better, when the second gear 91 rotates to be not meshed with the full gear 93, the groove cylinder 94 does not rotate any more, the sliding plate 96 is located at the leftmost end, and the screwdriver can be intermittently inserted into the screwdriver handle.
Example 2
On the basis of embodiment 1, as shown in fig. 1 and 5, the device further includes an ejector plate 11, a second support rod 12, a third slide rail 13, a first wedge block 14 and a third spring 15, the upper side of the right portion of the first rack 34 is fixedly connected with the ejector plate 11, the right side of the top of the base 1 is fixedly connected with the second support rod 12, the third slide rail 13 is installed on the upper portion of the second support rod 12, the third slide rail 13 is slidably provided with the first wedge block 14, the first wedge block 14 is in fit contact with the ejector plate 11, and the third spring 15 is connected between the upper portion of the left side of the first wedge block 14 and the third slide rail 13.
Under initial condition, third spring 15 is in compression state, can drive liftout plate 11 downstream when first rack 34 moves down, make liftout plate 11 no longer block first wedge 14, under the reset action of third spring 15, first wedge 14 can move to the left side, make first wedge 14 left end and screwdriver handle contact, because first wedge 14 left end is equipped with magnet, after the screwdriver assembly finishes, can hold the finished product screwdriver through magnet, later first rack 34 moves up and resets, can promote first wedge 14 right, third spring 15 is compressed, magnet just can take out the screwdriver finished product, later people take out it again can.
The above description is only for the specific embodiments of the present invention, but the scope of the present invention is not limited thereto, and any person skilled in the art can easily conceive of the changes or substitutions within the technical scope of the present invention, and all the changes or substitutions should be covered within the scope of the present invention. Therefore, the protection scope of the present invention shall be subject to the protection scope of the appended claims.
Claims (5)
1. An apparatus for the secure assembly of a screwdriver, comprising:
the servo motor comprises a base (1), wherein a servo motor (2) is installed on one side of the top of the base (1);
the first supporting plate (5), the first supporting plate (5) is fixedly connected to one side of the top of the base (1) far away from the servo motor (2);
the first supporting rods (6), the first supporting rods (6) are symmetrically and fixedly connected to one side, close to the first supporting plate (5), of the top of the base (1);
a first bin (7), wherein the first bin (7) is arranged between the top sides of the first supporting rods (6);
the second material box (8), the second material box (8) is arranged between the other sides of the tops of the first supporting rods (6);
the clamping mechanism (3) is arranged in the middle of the top of the base (1);
the pushing mechanism (9), the said pushing mechanism (9) is set up on the said first supporting plate (5);
the transmission assembly (4), the transmission assembly (4) is connected between the pushing mechanism (9) and the clamping mechanism (3);
the supporting plate (10), the supporting plate (10) is fixedly connected to the lower side of the first material box (7).
2. Device for the steady assembly of a screwdriver according to claim 1, characterized in that the clamping means (3) comprise:
a first bearing seat (30), wherein the first bearing seat (30) is installed at the top middle of the base (1);
a first rotating shaft (31), wherein the first rotating shaft (31) is rotatably arranged in the first bearing seat (30);
a first missing gear (32), the first missing gear (32) being welded to the first rotating shaft (31);
the first sliding rail (33), the first sliding rail (33) is installed in the middle of the top of the base (1);
a first rack (34), wherein the first rack (34) is slidably arranged on the first sliding rail (33), and the first rack (34) is meshed with the first gear (32);
the mounting seat (35) is fixedly connected to the middle of the top of the base (1);
a mounting shaft (36), wherein the mounting shaft (36) is connected to the mounting base (35);
the shaft sleeve (37), the shaft sleeve (37) is arranged on the mounting shaft (36) in a sliding manner, and the shaft sleeve (37) is fixedly connected with the first rack (34);
a first spring (312), the first spring (312) connected between the bushing (37) and the mount (35);
the connecting plate (38), the said connecting plate (38) is articularly connected to both sides of the said axle sleeve (37);
the lower parts of the connecting plates (38) are hinged with the rotating rods (39);
the clamping blocks (310) are arranged on the upper portion of the rotating rod (39) in a rotating mode;
the lower parts of the rotating rods (39) are hinged with the sliding rods (311), and the sliding rods (311) are connected with the mounting seat (35) in a sliding manner;
the second supporting plate (16), the second supporting plate (16) is fixedly connected to one side of the top of the base (1);
a second rack (18), wherein the second rack (18) is slidably arranged on the second support plate (16), and the second rack (18) is meshed with the first gear (32);
a fourth spring (17), the fourth spring (17) being connected between the second rack (18) and the second support plate (16);
the second wedge block (19) is arranged in the second rack (18) in a sliding mode, and the second wedge block (19) is in fit contact with the first rack (34);
a fifth spring (20), the fifth spring (20) being connected between the second wedge block (19) and the second rack (18).
3. Device for the steady assembly of a screwdriver according to claim 2, characterized in that the pushing means (9) comprise:
the second rotating shaft (90) is rotatably arranged on the first supporting plate (5), and the transmission assembly (4) is connected between the second rotating shaft (90) and the first rotating shaft (31);
a second missing gear (91), wherein the second missing gear (91) is welded on the second rotating shaft (90);
the third rotating shaft (92) is rotatably arranged at the upper part of the first supporting plate (5);
the full gear (93), the said full gear (93) welds on the said third spindle (92), the said full gear (93) engages with said second and lacks the gear (91);
the grooved drum (94), the said grooved drum (94) is connected to the middle part of the said third spindle (92);
the second sliding rail (95) is mounted at the upper part of the first supporting plate (5);
the sliding plate (96) is arranged in the second sliding rail (95) in a sliding mode, the upper portion of the sliding plate (96) is located in the first material box (7), and the lower portion of the sliding plate (96) is connected with the groove drum (94) in a sliding mode.
4. The apparatus for securely assembling a screwdriver as defined in claim 3, further comprising:
the ejection plate (11), the ejection plate (11) is fixedly connected to the upper side of the first rack (34);
the second supporting rod (12), the second supporting rod (12) is fixedly connected to one side of the top of the base (1);
the third sliding rail (13) is arranged at the upper part of the second supporting rod (12);
the first wedge-shaped block (14) is arranged on the third slide rail (13) in a sliding mode, and the first wedge-shaped block (14) is in fit contact with the ejector plate (11);
a third spring (15), the third spring (15) being connected between the first wedge block (14) and the third slide rail (13).
5. Device for screwdriver steady assembly according to claim 1, characterized in that said first magazine (7) and said second magazine (8) are each bolted to said first support bar (6).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010873441.8A CN112025275A (en) | 2020-08-26 | 2020-08-26 | Equipment for stably assembling screwdriver |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010873441.8A CN112025275A (en) | 2020-08-26 | 2020-08-26 | Equipment for stably assembling screwdriver |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN112025275A true CN112025275A (en) | 2020-12-04 |
Family
ID=73580057
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202010873441.8A Withdrawn CN112025275A (en) | 2020-08-26 | 2020-08-26 | Equipment for stably assembling screwdriver |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN112025275A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112606182A (en) * | 2020-12-10 | 2021-04-06 | 江西省金三角建筑陶瓷科技协同创新有限公司 | Energy-saving and environment-friendly ceramic glazing equipment |
| CN113232156A (en) * | 2021-05-18 | 2021-08-10 | 安徽鑫生新型建材有限公司 | Special mortar production process and production equipment |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR20030093511A (en) * | 2002-06-03 | 2003-12-11 | 김영인 | Apparatus for coupling screw, and method threrof |
| CN207171446U (en) * | 2017-08-09 | 2018-04-03 | 丽水市蒙泰重柴配件有限公司 | A kind of screw tightness device |
| CN108296735A (en) * | 2018-01-30 | 2018-07-20 | 重庆市长寿区惠峰汽车修理有限公司 | Auto parts machinery winding device |
| CN108436435A (en) * | 2018-03-23 | 2018-08-24 | 岑佰庆 | A kind of screwdriver assembling device |
| CN109693091A (en) * | 2019-03-13 | 2019-04-30 | 潘金彩 | A kind of automatic assembly equipment for screwdriver |
| CN111559088A (en) * | 2020-05-28 | 2020-08-21 | 赵官海 | Queen bee cage manufacturing equipment |
-
2020
- 2020-08-26 CN CN202010873441.8A patent/CN112025275A/en not_active Withdrawn
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR20030093511A (en) * | 2002-06-03 | 2003-12-11 | 김영인 | Apparatus for coupling screw, and method threrof |
| CN207171446U (en) * | 2017-08-09 | 2018-04-03 | 丽水市蒙泰重柴配件有限公司 | A kind of screw tightness device |
| CN108296735A (en) * | 2018-01-30 | 2018-07-20 | 重庆市长寿区惠峰汽车修理有限公司 | Auto parts machinery winding device |
| CN108436435A (en) * | 2018-03-23 | 2018-08-24 | 岑佰庆 | A kind of screwdriver assembling device |
| CN109693091A (en) * | 2019-03-13 | 2019-04-30 | 潘金彩 | A kind of automatic assembly equipment for screwdriver |
| CN111559088A (en) * | 2020-05-28 | 2020-08-21 | 赵官海 | Queen bee cage manufacturing equipment |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112606182A (en) * | 2020-12-10 | 2021-04-06 | 江西省金三角建筑陶瓷科技协同创新有限公司 | Energy-saving and environment-friendly ceramic glazing equipment |
| CN113232156A (en) * | 2021-05-18 | 2021-08-10 | 安徽鑫生新型建材有限公司 | Special mortar production process and production equipment |
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| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
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| WW01 | Invention patent application withdrawn after publication |
Application publication date: 20201204 |
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| WW01 | Invention patent application withdrawn after publication |