CN114412368A - Drilling machine - Google Patents
Drilling machine Download PDFInfo
- Publication number
- CN114412368A CN114412368A CN202210192460.3A CN202210192460A CN114412368A CN 114412368 A CN114412368 A CN 114412368A CN 202210192460 A CN202210192460 A CN 202210192460A CN 114412368 A CN114412368 A CN 114412368A
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- CN
- China
- Prior art keywords
- drill bit
- drill
- rod
- joint
- driving part
- 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.)
- Pending
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Classifications
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- E—FIXED CONSTRUCTIONS
- E21—EARTH DRILLING; MINING
- E21B—EARTH DRILLING, e.g. DEEP DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
- E21B15/00—Supports for the drilling machine, e.g. derricks or masts
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- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02D—FOUNDATIONS; EXCAVATIONS; EMBANKMENTS; UNDERGROUND OR UNDERWATER STRUCTURES
- E02D3/00—Improving or preserving soil or rock, e.g. preserving permafrost soil
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- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02D—FOUNDATIONS; EXCAVATIONS; EMBANKMENTS; UNDERGROUND OR UNDERWATER STRUCTURES
- E02D5/00—Bulkheads, piles, or other structural elements specially adapted to foundation engineering
- E02D5/22—Piles
- E02D5/34—Concrete or concrete-like piles cast in position ; Apparatus for making same
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- E—FIXED CONSTRUCTIONS
- E21—EARTH DRILLING; MINING
- E21B—EARTH DRILLING, e.g. DEEP DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
- E21B10/00—Drill bits
- E21B10/42—Rotary drag type drill bits with teeth, blades or like cutting elements, e.g. fork-type bits, fish tail bits
- E21B10/43—Rotary drag type drill bits with teeth, blades or like cutting elements, e.g. fork-type bits, fish tail bits characterised by the arrangement of teeth or other cutting elements
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- E—FIXED CONSTRUCTIONS
- E21—EARTH DRILLING; MINING
- E21B—EARTH DRILLING, e.g. DEEP DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
- E21B17/00—Drilling rods or pipes; Flexible drill strings; Kellies; Drill collars; Sucker rods; Cables; Casings; Tubings
- E21B17/02—Couplings; joints
- E21B17/04—Couplings; joints between rod or the like and bit or between rod and rod or the like
- E21B17/046—Couplings; joints between rod or the like and bit or between rod and rod or the like with ribs, pins, or jaws, and complementary grooves or the like, e.g. bayonet catches
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- E—FIXED CONSTRUCTIONS
- E21—EARTH DRILLING; MINING
- E21B—EARTH DRILLING, e.g. DEEP DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
- E21B19/00—Handling rods, casings, tubes or the like outside the borehole, e.g. in the derrick; Apparatus for feeding the rods or cables
- E21B19/02—Rod or cable suspensions
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- E—FIXED CONSTRUCTIONS
- E21—EARTH DRILLING; MINING
- E21B—EARTH DRILLING, e.g. DEEP DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
- E21B3/00—Rotary drilling
- E21B3/02—Surface drives for rotary drilling
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- E—FIXED CONSTRUCTIONS
- E21—EARTH DRILLING; MINING
- E21B—EARTH DRILLING, e.g. DEEP DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
- E21B41/00—Equipment or details not covered by groups E21B15/00 - E21B40/00
Abstract
A drilling machine comprises a front end drill bit, a pipe body, a plurality of inclined rods with a plurality of alloy cutter heads, a drill bit with a lower circular ring and an upper joint, a plurality of sections of drill rods with the upper joint, the lower joint and a rod body, a driving part with a gear box, two lifting pulley blocks, two guide frames and a slurry feeding pipe, and a rack with a top pulley block, a lateral pulley block and two guide rails; the driving part is respectively arranged on two guide rails of the inner cavity of the frame through the guide frames at the left end and the right end; the upper end of a drill rod output shaft of the driving part is fixedly provided with a rotary joint and then is connected with a slurry feeding pipe, and the other end of the slurry feeding pipe is connected with an external slurry feeding and air feeding pipeline system; the lower end of the drill rod output shaft of the driving part is connected with a plurality of sections of drill rods and drill bits. The drilling machine has the characteristics of low net height of equipment, flexible movement, convenient assembly and disassembly and the like, realizes simultaneous cutting drilling and stirring pile formation by the alloy cutter heads on the front end drill bit and the inclined rod, meets the construction requirement of a construction area with limited height, and effectively improves the construction efficiency of a cast-in-place pile and the foundation treatment efficiency.
Description
Technical Field
The invention belongs to the technical field of construction machinery, and particularly relates to a drilling machine.
Background
With the rapid development of the construction of the national traffic infrastructure, the construction problem of a plurality of pile foundation projects in the areas limited by the surrounding environment, such as urban rail traffic, urban centers and the like, and particularly when a structure exists above a construction site and a high-voltage power facility is met, the traditional walking type drilling machine cannot enter the construction site due to the fact that a mast is tall and large and occupies a large area. Therefore, the method is particularly important for selecting a proper construction process and proper pile foundation construction equipment according to local conditions in the face of complex surrounding environment, wherein the fender pile in the high-voltage line influence range is designed into a manual hole digging pile, but the pile length is larger, the pile diameter is smaller, the soil layer is clay with micro-expansion characteristics, the volume is rapidly expanded after soaking, hole collapse is easy to occur, the safety risk of manual hole digging is high, the construction difficulty is large, the implementation is difficult, and a large amount of manpower and capital cost are consumed. Therefore, a drilling machine is needed to be developed, so that the drilling machine is convenient to disassemble and butt-joint quickly between the drill rod and the end part of the output shaft of the power head, between the drill rod and between the drill rod and the drill bit, and the hole forming quality is ensured, so that the drilling machine is suitable for the areas with limited height in construction places and large influence from the surrounding environment to carry out bored concrete pile construction and foundation reinforcement treatment construction.
Disclosure of Invention
The invention mainly aims to overcome the defects in the prior art, and provides a drilling machine which is convenient to move, simple in structure, convenient to butt joint and reliable in hole forming, so that the output shafts of a drill rod and a driving part, the drill rod and the drill bit are firmly butted, the alloy cutter heads on the drill bit at the front end and each inclined rod can simultaneously cut, drill and stir to form a pile, meanwhile, a lower circular ring on the drill bit can be used for forming an effective hole wall, the quick drilling and stirring construction can be realized in a construction area with limited height and limited surrounding environment, and the operation efficiency of hole forming and foundation reinforcement treatment of a cast-in-place pile is improved.
The invention is realized by the following technical scheme:
a drilling machine comprises a drilling head comprising a front end drilling head, a pipe body, a plurality of inclined rods with a plurality of alloy cutter heads, a lower circular ring and an upper joint, a plurality of sections of drilling rods comprising an upper joint, a lower joint and a rod body, a driving part comprising a gearbox, two groups of hoisting pulley blocks, two groups of guide frames and a slurry feeding pipe, and a rack comprising a top pulley block, a lateral pulley block and two guide rails;
the method is characterized in that:
the frame is a frame structure with a rectangular section; the guide rails are respectively arranged on the inner walls of the left side and the right side of the inner cavity of the rack along the vertical direction of the rack; the top pulley block is arranged at the top of the frame body, and the lateral pulley block is arranged on the left side of the top of the frame;
the driving part is arranged in the inner cavity of the frame and is arranged on two guide rails of the inner cavity of the frame through guide frames at the left end and the right end of the driving part; the left end and the right end of the gearbox of the driving part are respectively and fixedly provided with a guide frame, and the guide frames are respectively arranged on a left guide rail and a right guide rail of the inner cavity of the frame through guide wheels arranged on the outer side surfaces of the guide frames; the gearbox of the driving part is provided with a hollow output shaft which penetrates through the gearbox, and the upper end of the hollow output shaft is fixedly provided with a rotary joint and then is connected with a slurry feeding pipe; the other end of the slurry feeding pipe is connected with an external slurry feeding and air feeding pipeline system; the lower end of a hollow output shaft of the gearbox is fixedly provided with a connecting disc; the hoisting pulley blocks are fixedly arranged at the front side and the rear side of the end surface of the gearbox, and a steel wire rope led out from an external winch penetrates through the lateral pulley block at the upper end of the rack, the top pulley block and the two hoisting pulley blocks of the driving part;
the drill rod is fixedly arranged below a connecting disc at the lower end of a hollow output shaft of the gearbox; the outer end face of the lower joint of the drill rod is provided with a straight lug and a plurality of uniformly distributed through holes; the outer end face of the upper connector of the drill rod is provided with a straight groove and a plurality of uniformly distributed screw holes; after the straight groove of the upper joint of the drill rod enters the straight bump of the connecting disc at the lower end of the hollow output shaft of the gearbox, the fastening screw penetrates through each through hole of the connecting disc and is screwed on each screw hole of the upper joint, and the connection of the drill rod and the connecting disc is completed;
the drill bit is fixedly arranged below the section of the drill rod at the lowest part; the outer end face of the upper joint of the drill bit is provided with a straight groove and a plurality of uniformly distributed screw holes; the straight groove of the upper joint of the drill bit enters the straight convex block of the lower joint of the drill rod, and the fastening screw passes through each through hole of the lower joint of the drill rod and is screwed on each screw hole of the upper joint of the drill bit to complete the connection of the drill bit and the drill rod; the front end drill bit of the drill bit is a plate-shaped drill bit with a bevel edge and a drill point provided with a wear-resistant layer, and the front end drill bit is inserted into the front end part of the pipe body through a U-shaped groove of the front end drill bit and is welded and fixed with the pipe body; the inclined rods of the drill bit are positioned between the front end drill bit and the lower circular ring and are obliquely arranged in a geometric symmetrical mode in the radial direction of the drill bit, one ends of the inclined rods are respectively fixed on the outer wall of the pipe body above the front end drill bit, and the other ends of the inclined rods are respectively fixed on the lower end face of the lower circular ring; the alloy cutter heads are arranged on one side of each inclined rod at intervals along the length direction of each inclined rod; the lower ring of the drill bit is fixed with the outer wall of the pipe body through a plurality of spokes.
The guide wheels on the outer side surface of the guide frame can be arranged into two or three along the vertical direction.
The invention also can ensure that the fit clearance between the straight grooves of the upper joint of the drill bit and the drill rod and the straight lugs of the connecting disc and the lower joint of the drill rod is 0.20-0.30 mm.
The invention can also be that the inclined rods of the drill bit are obliquely arranged into two, three, four or six in a geometric symmetry mode in the radial direction of the drill bit.
Drawings
FIG. 1 is a schematic structural view of the drilling rig of the present invention;
FIG. 2 is a left side view of FIG. 1;
FIG. 3 is a top view of FIG. 1;
FIG. 4 is a schematic view of the construction of the drill bit of the drilling rig of the present invention;
FIG. 5 is a top view of FIG. 4;
FIG. 6 is a bottom view of FIG. 4;
FIG. 7 is a sectional view taken along line A-A of FIG. 5;
FIG. 8 is an enlarged view of a portion B of FIG. 7;
FIG. 9 is a schematic view of the construction of the drive section of the drill of the present invention;
fig. 10 is a left side view of fig. 9.
Detailed Description
The drilling tool of the drilling machine of the present invention will be further described with reference to fig. 1-10.
A drilling machine comprises a drilling head 1 comprising a front end drilling head 11, a pipe body 12, a plurality of inclined rods 13 with a plurality of alloy cutter heads 138, a lower circular ring 14 and an upper joint 66, a plurality of sections of drilling rods 2 comprising the upper joint 66, a lower joint 66' and a rod body 22, a driving part 3 comprising a gearbox 31, two lifting pulley blocks 32, two guide frames 34 and a slurry feeding pipe 33, and a frame 4 comprising a top pulley block 42, a lateral pulley block 48 and two guide rails 44; wherein:
the frame 4 is a frame structure with a rectangular section; the guide rails 44 are respectively arranged on the inner walls of the left and right sides of the inner cavity of the rack along the vertical direction of the rack 4; the top pulley block 42 is arranged at the top of the frame body 4, and the lateral pulley block 48 is arranged at the left side of the top of the frame 4.
The driving part 3 is arranged in the inner cavity of the frame 4 and is arranged on two guide rails 44 of the inner cavity of the frame 4 through the guide frames 34 at the left end and the right end; the left end and the right end of the gearbox 31 of the driving part 3 are respectively fixedly provided with a guide frame 34 which is respectively arranged on the left guide rail 44 and the right guide rail 44 of the inner cavity of the frame 4 through a guide wheel 344 arranged on the outer side surface of the guide frame; the guide wheels 344 on the outer side surface of the guide frame 34 are provided in two or three in the vertical direction. Therefore, the driving part 3 can move up and down stably in the inner cavity of the frame 4, and the pile forming quality of the drilling machine construction is ensured, so that the drilling and digging operation efficiency is further improved. The gearbox 31 of the driving part 3 is provided with a hollow output shaft which penetrates through the gearbox 31 to be arranged, and the upper end of the hollow output shaft is fixedly provided with a rotary joint and then is connected with the slurry feeding pipe 33; the other end of the slurry feeding pipe 33 is connected with an external slurry feeding and air feeding pipeline system; the lower end of the hollow output shaft of the gearbox 31 is fixedly provided with a connecting disc 311; the hoisting pulley blocks 32 are fixedly arranged at the front side and the rear side of the end surface of the gear box 31, and a steel wire rope led out from an external winch penetrates through the lateral pulley block 48 at the upper end of the rack 4, the top pulley block 42 and the two hoisting pulley blocks 32 of the driving part 3.
The drill rod 2 is fixedly arranged below a connecting disc 311 at the lower end of the hollow output shaft of the gearbox 31; the outer end surfaces of the connecting disc 311 and the lower joint 66 'of the drill rod 2 are provided with straight convex blocks 664' and a plurality of uniformly distributed through holes; the outer end surface of the upper joint 66 of the drill rod 2 is provided with a straight groove 664 and a plurality of uniformly distributed screw holes; after the straight groove 664 of the upper joint 66 of the drill rod 2 enters the straight protruding block 664' of the connecting disc 311 at the lower end of the hollow output shaft of the gearbox 31, fastening screws are screwed on the screw holes of the upper joint 66 after passing through the through holes of the connecting disc 311, and the connection of the drill rod 2 and the connecting disc 311 is completed.
The drill bit 1 is fixedly arranged below the section of drill rod 2 at the lowest part; the outer end face of the upper joint 66 of the drill bit 1 is provided with a straight groove 664 and a plurality of uniformly distributed screw holes; the straight groove 664 of the upper joint 66 of the drill bit 1 enters the straight bump 664 ' of the lower joint 66 ' of the drill rod 2, and a fastening screw is screwed into each screw hole of the upper joint 66 of the drill bit 1 through each through hole of the lower joint 66 ' of the drill rod 2, so that the connection of the drill bit 1 and the drill rod 2 is completed; . The fit clearance between the straight groove 664 of the upper joint 66 of the drill bit 1 and the drill rod 2 and the straight convex block 664 'of the connecting disc 311 and the lower joint 66' of the drill rod 2 is 0.20-0.30 mm. Therefore, the drill bit 1, the drill rod 2 and the connecting disc 311 are connected reliably and tightly, the power torque of the driving part 3 is effectively transmitted, great shaking in the rotating process of the drilling tool is avoided, and the vertical precision of drilling and pile forming is further improved. The front end drill bit 11 of the drill bit 1 is a plate-shaped drill bit with a bevel edge and a wear-resistant layer at the drill tip, and is inserted into the front end part of the pipe body 12 through a U-shaped groove 114 of the front end drill bit and is welded and fixed with the front end part; the inclined rod 13 of the drill bit 1 is positioned between the front end drill bit 11 and the lower circular ring 14 and is obliquely arranged in a geometric symmetrical mode in the radial direction of the drill bit 1, one end of the inclined rod 13 is respectively fixed on the outer wall of the pipe body 12 above the front end drill bit 11, and the other end of the inclined rod 13 is respectively fixed on the lower end face of the lower circular ring 14; the alloy cutter heads 138 are arranged on one side of each inclined rod 13 at intervals along the length direction of the inclined rod; the inclined rods 13 of the drill bit 1 are arranged in a geometrically symmetrical manner in the radial direction and are inclined in two, three, four or six directions. Therefore, in the rotating process of the plurality of inclined rods 13 of the drill bit 1, the alloy cutter head 138 on the inclined rods and the inclined edge and the drill point of the front end drill bit 11 drill and cut soil simultaneously, and the drilling capacity and the construction efficiency of the drilling machine are effectively improved. The lower ring 14 of the drill bit 1 is secured to the outer wall of the tubular body 12 by a plurality of spokes 77. When the drill bit of the drilling machine is pressed downwards, drilled upwards and stirred, the lower circular ring 14 of the drill bit 1 always protects the wall of the drilled hole, so that the hole wall is prevented from collapsing and retracting, and the pile forming quality of the cast-in-place pile and the foundation reinforcement treatment performance are effectively improved.
The drilling machine has the characteristics of convenient movement, simple structure, convenient butt joint of drilling tools, reliable pore forming and the like, achieves the firm butt joint of the drilling rod and the output shaft of the driving part as well as the drilling rod and the drilling bit, realizes the simultaneous cutting drilling and stirring pile forming of the alloy cutter heads on the front end drilling bit and each inclined rod, simultaneously realizes the quick drilling and stirring construction of the effective pore wall of the pore forming by the lower circular ring on the drilling bit in the construction area with height limitation and surrounding environment limitation, and improves the operation efficiency of the pore forming of the filling pile and the foundation reinforcement treatment.
Various changes and modifications may be made without departing from the general inventive concept, but they are within the scope of the present invention as long as they are equivalent or similar to the present invention.
Claims (4)
1. A drilling machine comprises a drilling head (1) comprising a front end drilling head (11), a pipe body (12), a plurality of inclined rods (13) with a plurality of alloy cutter heads (138), a lower ring (14) and an upper joint (66), a plurality of sections of drilling rods (2) comprising the upper joint (66), a lower joint (66') and a rod body (22), a driving part (3) comprising a gearbox (31), two hoisting pulley blocks (32), two guide frames (34) and a slurry feeding pipe (33), and a rack (4) comprising a top pulley block (42), a lateral pulley block (48) and two guide rails (44);
the method is characterized in that:
the rack (4) is a frame structure with a rectangular section; the guide rails (44) are respectively arranged on the inner walls of the left side and the right side of the inner cavity of the rack along the vertical direction of the rack (4); the top pulley block (42) is arranged at the top of the frame body (4), and the lateral pulley block (48) is arranged at the left side of the top of the frame (4);
the driving part (3) is arranged in the inner cavity of the frame (4) and is arranged on two guide rails (44) of the inner cavity of the frame (4) through guide frames (34) at the left end and the right end of the driving part; the left end and the right end of a gearbox (31) of the driving part (3) are respectively fixedly provided with a guide frame (34), and the guide frames are respectively arranged on a left guide rail (44) and a right guide rail (44) of an inner cavity of the frame (4) through guide wheels (344) arranged on the outer side surfaces of the guide frames; a hollow output shaft penetrating through the gearbox (31) is arranged on the gearbox (31) of the driving part (3), and the upper end of the hollow output shaft is fixedly provided with a rotary joint and then is connected with a pulp feeding pipe (33); the other end of the slurry feeding pipe (33) is connected with an external slurry feeding and air feeding pipeline system; a connecting disc (311) is fixedly arranged at the lower end of a hollow output shaft of the gearbox (31); the hoisting pulley blocks (32) are fixedly arranged at the front side and the rear side of the end surface of the gearbox (31), and a steel wire rope led out from an external winch penetrates through the lateral pulley block (48) at the upper end of the rack (4), the top pulley block (42) and the two hoisting pulley blocks (32) of the driving part (3);
the drill rod (2) is fixedly arranged below a connecting disc (311) at the lower end of a hollow output shaft of the gearbox (31); the outer end surfaces of the connecting disc (311) and the lower joint (66 ') of the drill rod (2) are respectively provided with a straight convex block (664') and a plurality of uniformly distributed through holes; the outer end face of an upper joint (66) of the drill rod (2) is provided with a straight groove (664) and a plurality of uniformly distributed screw holes; after the straight groove (664) of the upper joint (66) of the drill rod (2) enters the straight bump (664') of the connecting disc (311) at the lower end of the hollow output shaft of the gearbox (31), a fastening screw penetrates through each through hole of the connecting disc (311) and is screwed on each screw hole of the upper joint (66), and the connection of the drill rod (2) and the connecting disc (311) is completed;
the drill bit (1) is fixedly arranged below the section of the drill rod (2) at the lowest part; the outer end face of an upper joint (66) of the drill bit (1) is provided with a straight groove (664) and a plurality of uniformly distributed screw holes; the straight groove (664) of the upper joint (66) of the drill bit (1) enters the straight bump (664 ') of the lower joint (66 ') of the drill rod (2), and a fastening screw is screwed into each screw hole of the upper joint (66) of the drill bit (1) through each through hole of the lower joint (66 ') of the drill rod (2), so that the connection of the drill bit (1) and the drill rod (2) is completed;
the front end drill bit (11) of the drill bit (1) is a plate-shaped drill bit with a bevel edge and a drill tip with a wear-resistant layer, and is inserted into the front end part of the pipe body (12) through a U-shaped groove (114) of the front end drill bit and is welded and fixed with the front end part; the inclined rod (13) of the drill bit (1) is positioned between the front end drill bit (11) and the lower circular ring (14) and is obliquely arranged in a geometric symmetrical mode in the radial direction of the drill bit (1), one end of the inclined rod is respectively fixed on the outer wall of the pipe body (12) above the front end drill bit (11), and the other end of the inclined rod is respectively fixed on the lower end face of the lower circular ring (14); the alloy cutter heads (138) are arranged on one side of each inclined rod (13) at intervals along the length direction of the inclined rod; the lower ring (14) of the drill bit (1) is fixed with the outer wall of the pipe body (12) through a plurality of spokes (77).
2. Drilling machine according to claim 1, characterized in that the guide wheels (344) on the outer side of the guide frame (34) are arranged in two, or three, in the up-down direction thereof.
3. Drilling machine according to claim 1, characterized in that the fit clearance of the straight groove (664) of the upper joint (66) of the drill bit (1), the drill rod (2) and the straight lug (664 ') of the lower joint (66') of the drill rod (2), the coupling disc (311), is 0.20-0.30 mm.
4. Drilling machine according to claim 1, characterized in that the bent rods (13) of the drill bit (1) are arranged obliquely in two, or three, or four, or six, in a geometrically symmetrical manner in the radial direction thereof.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210192460.3A CN114412368A (en) | 2022-03-01 | 2022-03-01 | Drilling machine |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210192460.3A CN114412368A (en) | 2022-03-01 | 2022-03-01 | Drilling machine |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN114412368A true CN114412368A (en) | 2022-04-29 |
Family
ID=81262465
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202210192460.3A Pending CN114412368A (en) | 2022-03-01 | 2022-03-01 | Drilling machine |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN114412368A (en) |
-
2022
- 2022-03-01 CN CN202210192460.3A patent/CN114412368A/en active Pending
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