CN105643537A - Interferential silencer for pneumatic wrench - Google Patents
Interferential silencer for pneumatic wrench Download PDFInfo
- Publication number
- CN105643537A CN105643537A CN201610176367.8A CN201610176367A CN105643537A CN 105643537 A CN105643537 A CN 105643537A CN 201610176367 A CN201610176367 A CN 201610176367A CN 105643537 A CN105643537 A CN 105643537A
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- CN
- China
- Prior art keywords
- interior pipe
- hole
- annular slab
- outer tube
- pipe
- 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.)
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Classifications
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B25—HAND TOOLS; PORTABLE POWER-DRIVEN TOOLS; MANIPULATORS
- B25B—TOOLS OR BENCH DEVICES NOT OTHERWISE PROVIDED FOR, FOR FASTENING, CONNECTING, DISENGAGING OR HOLDING
- B25B21/00—Portable power-driven screw or nut setting or loosening tools; Attachments for drilling apparatus serving the same purpose
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B25—HAND TOOLS; PORTABLE POWER-DRIVEN TOOLS; MANIPULATORS
- B25F—COMBINATION OR MULTI-PURPOSE TOOLS NOT OTHERWISE PROVIDED FOR; DETAILS OR COMPONENTS OF PORTABLE POWER-DRIVEN TOOLS NOT PARTICULARLY RELATED TO THE OPERATIONS PERFORMED AND NOT OTHERWISE PROVIDED FOR
- B25F5/00—Details or components of portable power-driven tools not particularly related to the operations performed and not otherwise provided for
Abstract
An interferential silencer for a pneumatic wrench relates to a silencer and comprises an inner tube, an outer tube, an inlet-end annular plate and a ventilated annular plate, wherein the inlet-end annular plate is arranged between the inner tube and the outer tube at an air inlet end, the ventilated annular plate is arranged between the inner tube and the outer tube at an air outlet end, and an air outlet is formed between the ventilated annular plate and the air outlet end part of the outer tube; a plurality of uniformly distributed through holes A are formed in the wall of the inner tube, a micro-punched plate with micropores is mounted at a part, close to the air outlet end part, of the inner tube, and a cover plate used for blocking off the inner tube is mounted at the air outlet end part of the inner tube; and a plurality of uniformly distributed elbow mounting holes are formed in the ventilated annular plate, and elbows which are inwardly bent symmetrically are mounted on the elbow mounting holes. The interferential silencer ensures that high-speed airflow entering the inner tube is expanded, turned back and finally subjected to clash discharge at the outlets of the elbows, so that the airflow energy is greatly reduced, and the noise reduction effect is very good. The interferential silencer also has the characteristics of low price, small size, light weight, use convenience and wide application range, and is easy to popularize.
Description
Technical field
The present invention relates to a kind of acoustic filter, particularly a kind of interference acoustic filter for pneumatic impact spanner.
Background technology
Pneumatic tool refers mainly to gas emery wheel, pneumatic drill, pneumatic impact spanner, gas pick, pneumatic chipping hammer, Pneumatic tamping machine and pneumatic riveter etc., particularly applies on assembling line very general in the industrial production. Currently, the assembly shop of machinery and automobile production manufacturing enterprise, pneumatic impact spanner is the most frequently used pneumatic tool. Additionally, the assembling of the various machine of the industries such as aircraft, boats and ships and household electrical appliances, repairing and bridge construction etc. will use the multiple pneumatic tools such as pneumatic impact spanner; Piece surface rust cleaning, forge piece reaming, polish and the heavy operation such as polishing also to use various pneumatic tool. Pneumatic tool, while alleviating people's labor intensity, also brings along many adverse effects, and noise is the contaminated environment factor that one of them is the most prominent. It is known that all air tool power both are from compression air. Release suddenly after the high pressure draught air tool workpiece of driving necessarily leads to noise, and noise during every pneumatic impact spanner normal operation generally all reaches, cause noise in workshop to be mostly inLeft and right. And " industrial undertaking's noise sanitary standard " regulation of China's promulgation in 2002: 8 hours every days of working space operator, the health limit value sound level of continuous contact noise was 85dB (A), often increased 3dB, and the time of contact noise day will reduce by half. Therefore, use noise during pneumatic impact spanner normal operation apparently higher than national standard.
The noise exceeding sanitary standard can bring out various disease, and serious infringement people's is healthy. It is healthy, prosperous and powerful concerning national economic development and country that noise control pollutes concerning numerous working people, significant. Current existing various pneumatic impact spanner acoustic filters, but cost is higher, and volume is bigger than normal, uses very inconvenient.
Summary of the invention
The technical problem to be solved in the present invention is: provide the interference acoustic filter for pneumatic impact spanner that a kind of excellent noise reduction effect, price are low, volume is little, easy to use.
The technical scheme solving above-mentioned technical problem is: a kind of interference acoustic filter for pneumatic impact spanner, including interior pipe, the outer tube that is enclosed within outside interior pipe, also include inlet end annular slab, ventilative annular slab, described inlet end annular slab is arranged between the inner and outer tubes of inlet end M, ventilative annular slab is arranged between the inner and outer tubes of outlet side N, this inlet end annular slab, interior pipe, outer tube, ventilative annular slab connect into an entirety, and form gas outlet between the end, outlet side of ventilative annular slab and outer tube; The tube wall of described interior pipe is provided with multiple uniform through hole A, and interior pipe is being provided with the microperforated panel of many micro-holes near its end, outlet side, and is provided with the boring cover plate for blocking interior pipe in its end, outlet side; Described ventilative annular slab is provided with multiple uniform bend pipe installing hole, and each bend pipe installing hole is mounted on the bend pipe of inside symmetric curvature.
The further technical scheme of the present invention is: described multiple uniform through hole A is uniformly arranged on a plurality of equidistant bus respectively.
The further technical scheme of the present invention is: the quantity of through hole A is 15, and these 15 through hole A are respectively by every bus 5, and totally 3 equidistant buses are evenly distributed on the tube wall of interior pipe.
The further technical scheme of the present invention is: the inlet end end of interior pipe stretches out in outer length of tube no less than 5mm, the inlet end end of this interior pipe is provided with a groove, and one piece of thin plate is radially respectively installed in these groove both sides, two pieces of thin plates are respectively provided with the through hole through bolt.
The further technical scheme of the present invention is: described microperforated panel is arranged on the 3��8mm place, end, outlet side from interior pipe.
The further technical scheme of the present invention is: the micro-hole aperture on microperforated panel is 0.5��2mm, and hole count is 30��80, and each micro-hole is distributed by axial symmetry on microperforated panel.
The further technical scheme of the present invention is: this interference acoustic filter also includes mounting seat, pipe that this mounting seat includes being connected in turn, rectangular tube, connecting bottom board, and connecting bottom board is provided with bolt hole; Described pipe and interior pipe link together, and connecting bottom board is connected with pneumatic impact spanner by the bolt in bolt hole and bolt hole.
Owing to adopting said structure, the interference acoustic filter for pneumatic impact spanner of the present invention compared with prior art, has the advantages that
1. excellent noise reduction effect:
Owing to the present invention includes interior pipe, outer tube, inlet end annular slab, ventilative annular slab, wherein inlet end annular slab is arranged between the inner and outer tubes of inlet end, ventilative annular slab is arranged between the inner and outer tubes of outlet side, this inlet end annular slab, interior pipe, outer tube, ventilative annular slab connect into an entirety, and form gas outlet between the end, outlet side of ventilative annular slab and outer tube; The tube wall of interior pipe is provided with multiple uniform through hole A, and interior pipe is being provided with the microperforated panel of many micro-holes near its end, outlet side, and is provided with the boring cover plate for blocking interior pipe in its end, outlet side; Ventilative annular slab is provided with multiple uniform bend pipe installing hole, and each bend pipe installing hole is mounted on the bend pipe of inside symmetric curvature. During use, high velocity air enters the interior pipe of acoustic filter from pneumatic impact spanner after discharging, then expand, turn back, and finally carries out head-on collision at multiple winding pipe exits and discharges. Air-flow is through this process in acoustic filter, and energy is suffered a loss greatly and realized noise reduction. Additionally, form resonant cavity between microperforated panel and boring cover plate, it is also beneficial to the abatement of high-frequency noise. Therefore, the noise reduction of the present invention is very good
2. price is low:
The present invention includes interior pipe, outer tube, inlet end annular slab, ventilative annular slab, and it is relatively simple for structure, can make this acoustic filter with common iron, advantageous compared with in expensive foreign import acoustic filter price.
3. volume is little, lightweight:
The present invention includes interior pipe, outer tube, inlet end annular slab, ventilative annular slab, and volume is little, and whole muffler body all can be made with 0.4��0.6mm steel plate, and without any filler in acoustic filter, lightweight, it is convenient to transport and installation exercise;
4. easy to use, efficiency is high:
Owing to the volume of the present invention is little, lightweight, operate very convenient, efficiency is also higher.
5. applied widely:
The present invention can be connected with the pneumatic impact spanner of various ways by mounting seat. It is arranged on pneumatic impact spanner, can also act as auxiliary handgrip. Additionally, this acoustic filter applies also for other pneumatic tools such as gas emery wheel, pneumatic drill, pneumatic impact spanner, its scope of application is wider, it is easy to promote the use of.
Below, in conjunction with the accompanying drawings and embodiments the technical characteristic interfering acoustic filter for pneumatic impact spanner of the present invention is further described.
Accompanying drawing illustrates:
Fig. 1: the structural representation interfering acoustic filter for pneumatic impact spanner of the present invention described in embodiment one,
The A-A sectional view of Fig. 2: Fig. 1,
The B direction view of Fig. 3: Fig. 1,
The C direction view of Fig. 4: Fig. 1,
Fig. 5: the structural representation of bend pipe described in embodiment one,
Fig. 6: the structural representation of mounting seat described in embodiment one,
The left view of Fig. 7: Fig. 6,
Fig. 8: the structural representation interfering acoustic filter for pneumatic impact spanner of the present invention described in embodiment two,
Fig. 9: the structural representation interfering acoustic filter for pneumatic impact spanner of the present invention described in embodiment three.
In above-mentioned accompanying drawing, the explanation of each label is as follows:
1-inlet end annular slab,
Pipe in 2-, 21-through hole A, 22-groove, 23-thin plate, 24-bolt,
3-outer tube,
4-breathes freely annular slab, 41-bend pipe installing hole,
5-microperforated panel, 51-micro-hole,
6-boring cover plate,
7-bend pipe,
8-gas outlet,
9-mounting seat, 91-pipe, 92-rectangular tube, 93-connecting bottom board, 931-bolt hole,
M-inlet end, N-outlet side.
Detailed description of the invention
Embodiment one:
A kind of interference acoustic filter for pneumatic impact spanner (referring to Fig. 1-Fig. 4), including inlet end annular slab 1, interior pipe 2, outer tube 3, ventilative annular slab 4, outer tube 3 is enclosed within outside interior pipe 2, inlet end annular slab 1 is arranged between the interior pipe 2 of inlet end M and outer tube 3, ventilative annular slab 4 is arranged between the interior pipe 2 of outlet side N and outer tube 3, this inlet end annular slab 1, interior pipe 2, outer tube 3, ventilative annular slab 4 connect into an entirety, and form gas outlet 8 between the end, outlet side of ventilative annular slab 4 and outer tube 3.
The tube wall of described interior pipe 2 is provided with 15 uniform through hole A21, and these 15 through hole A21 are respectively by every bus 5, and totally 3 equidistant buses are evenly distributed on the tube wall of interior pipe 2. It is 6mm that the inlet end end of interior pipe 2 stretches out in outer tube 3 length, and the inlet end end of this interior pipe 2 is provided with a groove 22, and radially respectively installs one piece of thin plate 23 in these groove both sides, and two pieces of thin plates 23 are respectively provided with the through hole through bolt 24. Interior pipe 2 is being provided with the microperforated panel 5 of many micro-holes 51 from its 3mm place, end, outlet side, and is provided with the boring cover plate 6 for blocking interior pipe 2 in its end, outlet side; Form resonant cavity between microperforated panel 5 and boring cover plate 6, be conducive to the abatement of high-frequency noise. Micro-hole 51 aperture on microperforated panel 5 is 0.5mm, and hole count is 30, and each micro-hole 51 is distributed by axial symmetry on microperforated panel 5.
Ventilative annular slab 4 is provided with the bend pipe 7(being mounted on inside symmetric curvature 90 degree on 6 uniform 41,6 bend pipe installing holes 41 of bend pipe installing hole referring to Fig. 5).
This interference acoustic filter also includes the mounting seat 9 for connecting multi-form pneumatic impact spanner, pipe 91 that this mounting seat 9 includes being connected in turn, rectangular tube 92, connecting bottom board 93, and connecting bottom board 93 is provided with bolt hole 931; Described pipe 91 links together with interior pipe 2, and connecting bottom board 93 is connected (referring to Fig. 6-Fig. 7) by the bolt in bolt hole 931 and bolt hole with pneumatic impact spanner.
Embodiment two:
A kind of interference acoustic filter for pneumatic impact spanner, its basic structure, with embodiment one, is different in that: it is 8mm that the inlet end end of described interior pipe 2 stretches out in outer tube 3 length; Microperforated panel 5 is arranged at the 5mm place, end, outlet side from interior pipe 2; Micro-hole 51 aperture on microperforated panel 5 is 1mm, and hole count is 50; Described through hole A21 quantity is 16, and these 16 through hole A21 are respectively by every bus 4, and totally 4 equidistant buses are evenly distributed on the tube wall of interior pipe 2 (referring to Fig. 8). Its concrete structure is as follows:
A kind of interference acoustic filter (referring to Fig. 8) for pneumatic impact spanner, including inlet end annular slab 1, interior pipe 2, outer tube 3, ventilative annular slab 4, outer tube 3 is enclosed within outside interior pipe 2, inlet end annular slab 1 is arranged between the interior pipe 2 of inlet end M and outer tube 3, ventilative annular slab 4 is arranged between the interior pipe 2 of outlet side N and outer tube 3, this inlet end annular slab 1, interior pipe 2, outer tube 3, ventilative annular slab 4 connect into an entirety, and form gas outlet 8 between the end, outlet side of ventilative annular slab 4 and outer tube 3.
The tube wall of described interior pipe 2 is provided with 16 uniform through hole A21, and these 16 through hole A21 are respectively by every bus 4, and totally 4 equidistant buses are evenly distributed on the tube wall of interior pipe 2. It is 8mm that the inlet end end of interior pipe 2 stretches out in outer tube 3 length, and the inlet end end of this interior pipe 2 is provided with a groove 22, and radially respectively installs one piece of thin plate 23 in these groove both sides, and two pieces of thin plates 23 are respectively provided with the through hole through bolt 24. Interior pipe 2 is being provided with the microperforated panel 5 of many micro-holes 51 from its 5mm place, end, outlet side, and is provided with the boring cover plate 6 for blocking interior pipe 2 in its end, outlet side; Form resonant cavity between microperforated panel 5 and boring cover plate 6, be conducive to the abatement of high-frequency noise. Micro-hole 51 aperture on microperforated panel 5 is 1mm, and hole count is 50, and each micro-hole 51 is distributed by axial symmetry on microperforated panel 5.
Ventilative annular slab 4 is provided with the bend pipe 7 being mounted on inside symmetric curvature 90 degree on 6 uniform 41,6 bend pipe installing holes 41 of bend pipe installing hole.
This interference acoustic filter also includes the mounting seat 9 for connecting multi-form pneumatic impact spanner, pipe 91 that this mounting seat 9 includes being connected in turn, rectangular tube 92, connecting bottom board 93, and connecting bottom board 93 is provided with bolt hole 931; Described pipe 91 links together with interior pipe 2, and connecting bottom board 93 is connected with pneumatic impact spanner by the bolt in bolt hole 931 and bolt hole.
Embodiment three:
A kind of interference acoustic filter for pneumatic impact spanner, its basic structure, with embodiment one, is different in that: it is 10mm that the inlet end end of described interior pipe 2 stretches out in outer tube 3 length; Microperforated panel 5 is arranged at the 8mm place, end, outlet side from interior pipe 2; Micro-hole 51 aperture on microperforated panel 5 is 2mm, and hole count is 80; Described through hole A21 quantity is 20, and these 20 through hole A21 are respectively by every bus 5, and totally 4 equidistant buses are evenly distributed on the tube wall of interior pipe 2 (referring to Fig. 9).Its concrete structure is as follows:
A kind of interference acoustic filter for pneumatic impact spanner, including inlet end annular slab 1, interior pipe 2, outer tube 3, ventilative annular slab 4, outer tube 3 is enclosed within outside interior pipe 2, inlet end annular slab 1 is arranged between the interior pipe 2 of inlet end M and outer tube 3, ventilative annular slab 4 is arranged between the interior pipe 2 of outlet side N and outer tube 3, this inlet end annular slab 1, interior pipe 2, outer tube 3, ventilative annular slab 4 connect into an entirety, and form gas outlet 8 between the end, outlet side of ventilative annular slab 4 and outer tube 3.
The tube wall of described interior pipe 2 is provided with 20 uniform through hole A21, and these 20 through hole A21 are respectively by every bus 5, and totally 4 equidistant buses are evenly distributed on the tube wall of interior pipe 2. It is 10mm that the inlet end end of interior pipe 2 stretches out in outer tube 3 length, and the inlet end end of this interior pipe 2 is provided with a groove 22, and radially respectively installs one piece of thin plate 23 in these groove both sides, and two pieces of thin plates 23 are respectively provided with the through hole through bolt 24. Interior pipe 2 is being provided with the microperforated panel 5 of many micro-holes 51 from its 8mm place, end, outlet side, and is provided with the boring cover plate 6 for blocking interior pipe 2 in its end, outlet side; Form resonant cavity between microperforated panel 5 and boring cover plate 6, be conducive to the abatement of high-frequency noise. Micro-hole 51 aperture on microperforated panel 5 is 2mm, and hole count is 80, and each micro-hole 51 is distributed by axial symmetry on microperforated panel 5.
Ventilative annular slab 4 is provided with the bend pipe 7 being mounted on inside symmetric curvature 90 degree on 6 uniform 41,6 bend pipe installing holes 41 of bend pipe installing hole.
This interference acoustic filter also includes the mounting seat 9 for connecting multi-form pneumatic impact spanner, pipe 91 that this mounting seat 9 includes being connected in turn, rectangular tube 92, connecting bottom board 93, and connecting bottom board 93 is provided with bolt hole 931; Described pipe 91 links together with interior pipe 2, and connecting bottom board 93 is connected with pneumatic impact spanner by the bolt in bolt hole 931 and bolt hole.
As a kind of conversion of embodiment one to embodiment three, the inlet end end of described interior pipe 2 stretches out in outer tube 3 length no less than 5mm; Microperforated panel 5 is arranged at the 3��8mm place, end, outlet side from interior pipe 2; Micro-hole 51 aperture on microperforated panel 5 is 0.5��2mm, and hole count is 30��80; Described through hole A21 quantity is multiple, is uniformly arranged on respectively on a plurality of equidistant bus of interior pipe 2.
The operation principle of the present invention is as follows:
High velocity air enters interior pipe 2 from pneumatic impact spanner after discharging, then expand, turn back, and finally carries out head-on collision at 6 winding pipe exits and discharges. Air-flow is through this process in acoustic filter, and energy is suffered a loss greatly and realized noise reduction. Additionally, the microperforated panel 5 of interior pipe 2 right-hand member forms resonant cavity with boring cover plate 6, it is also beneficial to the abatement of high-frequency noise.
Claims (7)
1. the interference acoustic filter for pneumatic impact spanner, including interior pipe (2), it is enclosed within interior pipe (2) outer tube (3) outward, it is characterized in that: also include inlet end annular slab (1), ventilative annular slab (4), described inlet end annular slab (1) is arranged between the interior pipe (2) of inlet end (M) and outer tube (3), ventilative annular slab (4) is arranged between the interior pipe (2) of outlet side (N) and outer tube (3), this inlet end annular slab (1), interior pipe (2), outer tube (3), ventilative annular slab (4) connects into an entirety, and between ventilative annular slab (4) and the end, outlet side of outer tube (3), form gas outlet (8),The tube wall of described interior pipe (2) is provided with multiple uniform through hole A(21), interior pipe is being provided with the microperforated panel (5) of many micro-holes near its end, outlet side, and is provided with the boring cover plate (6) for blocking interior pipe (2) in its end, outlet side; Described ventilative annular slab (4) is provided with multiple uniform bend pipe installing hole (41), and each bend pipe installing hole (41) is mounted on the bend pipe (7) of inside symmetric curvature.
2. the interference acoustic filter for pneumatic impact spanner according to claim 1, it is characterised in that: described multiple uniform through hole A(21) it is uniformly arranged on respectively on a plurality of equidistant bus.
3. the interference acoustic filter for pneumatic impact spanner according to claim 2, it is characterized in that: through hole A(21) quantity be 15, these 15 through hole A(21) respectively by every bus 5, totally 3 equidistant buses are evenly distributed on the tube wall of interior pipe (2).
4. the interference acoustic filter for pneumatic impact spanner according to claim 1, it is characterized in that: the inlet end end of interior pipe (2) stretches out in outer length of tube no less than 5mm, the inlet end end of this interior pipe (2) is provided with a groove (22), and one piece of thin plate (23) is radially respectively installed in these groove both sides, two pieces of thin plates (23) are respectively provided with the through hole through bolt (24).
5. the interference acoustic filter for pneumatic impact spanner according to claim 1, it is characterised in that: described microperforated panel (5) is arranged on the 3��8mm place, end, outlet side from interior pipe (2).
6. the interference acoustic filter for pneumatic impact spanner according to claim 1, it is characterized in that: micro-hole (51) aperture on microperforated panel (5) is 0.5��2mm, hole count is 30��80, and each micro-hole (51) is upper by axial symmetry distribution at microperforated panel (5).
7. the interference acoustic filter for pneumatic impact spanner according to claim 1 to 6 any claim, it is characterized in that: this interference acoustic filter also includes mounting seat (9), pipe (91) that this mounting seat (9) includes being connected in turn, rectangular tube (92), connecting bottom board (93), connecting bottom board (93) is provided with bolt hole (931); Described pipe (91) and interior pipe (2) link together, and connecting bottom board (93) is connected with pneumatic impact spanner by the bolt in bolt hole (931) and bolt hole.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610176367.8A CN105643537B (en) | 2016-03-25 | 2016-03-25 | Interference silencer for pneumatic impact spanner |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610176367.8A CN105643537B (en) | 2016-03-25 | 2016-03-25 | Interference silencer for pneumatic impact spanner |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN105643537A true CN105643537A (en) | 2016-06-08 |
| CN105643537B CN105643537B (en) | 2018-02-09 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201610176367.8A Active CN105643537B (en) | 2016-03-25 | 2016-03-25 | Interference silencer for pneumatic impact spanner |
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| Country | Link |
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| CN (1) | CN105643537B (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108214384A (en) * | 2018-02-07 | 2018-06-29 | 苏州辰晟优机电科技有限公司 | Spanner |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6209678B1 (en) * | 1998-01-13 | 2001-04-03 | Robert E. Sterling | Pneumatic hand tool exhaust muffler |
| TWI266678B (en) * | 2005-05-09 | 2006-11-21 | Basso Ind Corp | Improved structure of a noise silencer for pneumatic tool |
| US7216739B2 (en) * | 1998-01-13 | 2007-05-15 | Exhaust Technologies, Inc. | Muffler for pneumatic hand tool |
| CN104018917A (en) * | 2014-05-30 | 2014-09-03 | 安徽同丰橡塑工业有限公司 | Noise eliminator |
| CN205552386U (en) * | 2016-03-25 | 2016-09-07 | 广西科技大学 | A interfere silencer for pneumatic wrench |
-
2016
- 2016-03-25 CN CN201610176367.8A patent/CN105643537B/en active Active
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6209678B1 (en) * | 1998-01-13 | 2001-04-03 | Robert E. Sterling | Pneumatic hand tool exhaust muffler |
| US7216739B2 (en) * | 1998-01-13 | 2007-05-15 | Exhaust Technologies, Inc. | Muffler for pneumatic hand tool |
| TWI266678B (en) * | 2005-05-09 | 2006-11-21 | Basso Ind Corp | Improved structure of a noise silencer for pneumatic tool |
| CN104018917A (en) * | 2014-05-30 | 2014-09-03 | 安徽同丰橡塑工业有限公司 | Noise eliminator |
| CN205552386U (en) * | 2016-03-25 | 2016-09-07 | 广西科技大学 | A interfere silencer for pneumatic wrench |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108214384A (en) * | 2018-02-07 | 2018-06-29 | 苏州辰晟优机电科技有限公司 | Spanner |
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|---|---|
| CN105643537B (en) | 2018-02-09 |
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