US20090288403A1 - Icing resistant reduced noise air motor exhaust - Google Patents
Icing resistant reduced noise air motor exhaust Download PDFInfo
- Publication number
- US20090288403A1 US20090288403A1 US12/373,469 US37346907A US2009288403A1 US 20090288403 A1 US20090288403 A1 US 20090288403A1 US 37346907 A US37346907 A US 37346907A US 2009288403 A1 US2009288403 A1 US 2009288403A1
- Authority
- US
- United States
- Prior art keywords
- exhaust
- manifold
- air
- muffler
- air motor
- 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.)
- Abandoned
Links
Images
Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04B—POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS
- F04B53/00—Component parts, details or accessories not provided for in, or of interest apart from, groups F04B1/00 - F04B23/00 or F04B39/00 - F04B47/00
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
- F01B—MACHINES OR ENGINES, IN GENERAL OR OF POSITIVE-DISPLACEMENT TYPE, e.g. STEAM ENGINES
- F01B31/00—Component parts, details, or accessories not provided for in, or of interest apart from, other groups
- F01B31/02—De-icing means for engines having icing phenomena
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
- F01N—GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR MACHINES OR ENGINES IN GENERAL; GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR INTERNAL COMBUSTION ENGINES
- F01N13/00—Exhaust or silencing apparatus characterised by constructional features ; Exhaust or silencing apparatus, or parts thereof, having pertinent characteristics not provided for in, or of interest apart from, groups F01N1/00 - F01N5/00, F01N9/00, F01N11/00
- F01N13/08—Other arrangements or adaptations of exhaust conduits
- F01N13/10—Other arrangements or adaptations of exhaust conduits of exhaust manifolds
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04B—POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS
- F04B39/00—Component parts, details, or accessories, of pumps or pumping systems specially adapted for elastic fluids, not otherwise provided for in, or of interest apart from, groups F04B25/00 - F04B37/00
Definitions
- the induction exhaust has an exhaust manifold and a muffler.
- warm ambient air is drawn into the muffler.
- Heat from this external source is conducted through the finned manifold to melt ice that can form inside the manifold during the exhaust cycle.
- the exhaust manifold directs the exhaust air stream into the muffler such that it creates a thin high velocity air stream creating a low pressure region on both sides of the stream due to the Bernoulli effect.
- This low pressure region creates a pressure differential which draws the warm external air into the exhaust system. The more external air that is drawn in, the more that icing will be reduced. This requires minimizing downstream exhaust pressure.
- a reverberation chamber is added after the muffler exit allowing the sound waves to disperse over time while minimizing backpressure.
- Reciprocating air motors have a short (15-50 msec.) blast of noise and the reverb chamber reduces peak levels and increases the duration of the noise.
- the chamber also has a capacitance function which minimizes downstream exhaust pressure.
- the exhaust manifold bolts to the side of the air motor air valve and serves to direct, muffle and diffuse the air motor exhaust using several components.
- a deflection plate disperses the initial exhaust blast as it leaves the air valve and enters the exhaust manifold. The deflection plate partially deflects the port noise and slows down and spreads out the tightly focused blast thereby reducing noise and exhaust velocity.
- a diffraction plate in the exhaust manifold diffracts and disperses the exhaust blast through many small holes rather one larger cross-section again reducing noise and exhaust velocity.
- An expansion chamber is provided in the manifold to direct the exhaust out of the air valve and down the center of the muffler. The muffler cross-section is also split into an expansion chamber and a nozzle with the expansion chamber allowing the exhaust blast to expand and dissipate before exiting the manifold through the diffraction plate and nozzle.
- FIG. 1 shows a cross-section f the air motor and in particular the exhaust system thereof.
- the air motor 10 of the instant invention has a piston 12 and an air valve 14 .
- the induction exhaust has an exhaust manifold 16 and a muffler 22 .
- warm ambient air is drawn into the muffler 22 .
- Heat from this external source is conducted through the finned manifold 16 to melt ice that can form inside the manifold 16 during the exhaust cycle.
- the exhaust manifold 16 directs the exhaust air stream into the muffler 22 such that it creates a thin high velocity air stream creating a low pressure region on both sides of the stream due to the Bernoulli effect. This low pressure region creates a pressure differential which draws the warm external air into the exhaust system. The more external air that is drawn in, the more that icing will be reduced. This requires minimizing downstream exhaust pressure.
- a reverberation chamber 26 is added after the muffler 22 exit allowing the sound waves to disperse over time while minimizing backpressure.
- Reciprocating air motors have a short (15-50 msec.) blast of noise and the reverb chamber reduces peak levels and increases the duration of the noise.
- the chamber also has a capacitance function which minimizes downstream exhaust pressure.
- the exhaust manifold 16 bolts to the side of the air motor air valve 14 and serves to direct, muffle and diffuse the air motor exhaust using several components.
- a deflection plate disperses the initial exhaust blast as it leaves the air valve and enters the exhaust manifold. The deflection plate partially deflects the port noise and slows down and spreads out the tightly focused blast thereby reducing noise and exhaust velocity.
- a diffraction plate in the exhaust manifold diffracts and disperses the exhaust blast through many small holes rather one larger cross-section again reducing noise and exhaust velocity.
- An expansion chamber is provided in the manifold to direct the exhaust out of the air valve and down the center of the muffler. The muffler cross-section is also split into an expansion chamber and a nozzle with the expansion chamber allowing the exhaust blast to expand and dissipate before exiting the manifold through the diffraction plate and nozzle.
Abstract
The induction exhaust has an exhaust manifold 16 and a muffler 22. In the instant invention, warm ambient air is drawn into the muffler 22. Heat from this external source is conducted through the finned manifold 16 to melt ice that can form inside the manifold 16 during the exhaust cycle. The exhaust manifold 16 bolts to the side of the air motor air valve 14 and serves to direct, muffle and diffuse the air motor exhaust using a deflection plate, a diffraction plate and an expansion chamber is provided in the manifold to direct the exhaust out of the air valve and down the center of the muffler 22.
Description
- This application claims the benefit of U.S. application Ser. No. 60/820,405, filed Jul. 26, 2006.
- While reciprocating air motors are well suited for operating reciprocating piston pumps, they can at times suffer from exhaust noise and a tendency to have ice build up in the air valve and/or exhaust passages due to the rapid expansion of the exhaust. U.S. Pat. No. 4,921,408 is one such attempt to improve operation and the contents thereof are incorporated by reference.
- The induction exhaust has an exhaust manifold and a muffler. In the instant invention, warm ambient air is drawn into the muffler. Heat from this external source is conducted through the finned manifold to melt ice that can form inside the manifold during the exhaust cycle.
- The exhaust manifold directs the exhaust air stream into the muffler such that it creates a thin high velocity air stream creating a low pressure region on both sides of the stream due to the Bernoulli effect. This low pressure region creates a pressure differential which draws the warm external air into the exhaust system. The more external air that is drawn in, the more that icing will be reduced. This requires minimizing downstream exhaust pressure.
- Minimizing downstream exhaust pressure, however, can lead to higher noise levels. In order to reduce noise, a reverberation chamber is added after the muffler exit allowing the sound waves to disperse over time while minimizing backpressure. Reciprocating air motors have a short (15-50 msec.) blast of noise and the reverb chamber reduces peak levels and increases the duration of the noise. The chamber also has a capacitance function which minimizes downstream exhaust pressure.
- The exhaust manifold bolts to the side of the air motor air valve and serves to direct, muffle and diffuse the air motor exhaust using several components. A deflection plate disperses the initial exhaust blast as it leaves the air valve and enters the exhaust manifold. The deflection plate partially deflects the port noise and slows down and spreads out the tightly focused blast thereby reducing noise and exhaust velocity. A diffraction plate in the exhaust manifold diffracts and disperses the exhaust blast through many small holes rather one larger cross-section again reducing noise and exhaust velocity. An expansion chamber is provided in the manifold to direct the exhaust out of the air valve and down the center of the muffler. The muffler cross-section is also split into an expansion chamber and a nozzle with the expansion chamber allowing the exhaust blast to expand and dissipate before exiting the manifold through the diffraction plate and nozzle.
- These and other objects and advantages of the invention will appear more fully from the following description made in conjunction with the accompanying drawings wherein like reference characters refer to the same or similar parts throughout the several views.
-
FIG. 1 shows a cross-section f the air motor and in particular the exhaust system thereof. - The air motor 10 of the instant invention has a piston 12 and an
air valve 14. The induction exhaust has an exhaust manifold 16 and amuffler 22. In the instant invention, warm ambient air is drawn into themuffler 22. Heat from this external source is conducted through the finned manifold 16 to melt ice that can form inside the manifold 16 during the exhaust cycle. - The exhaust manifold 16 directs the exhaust air stream into the
muffler 22 such that it creates a thin high velocity air stream creating a low pressure region on both sides of the stream due to the Bernoulli effect. This low pressure region creates a pressure differential which draws the warm external air into the exhaust system. The more external air that is drawn in, the more that icing will be reduced. This requires minimizing downstream exhaust pressure. - Minimizing downstream exhaust pressure, however, can lead to higher noise levels. In order to reduce noise, a
reverberation chamber 26 is added after themuffler 22 exit allowing the sound waves to disperse over time while minimizing backpressure. Reciprocating air motors have a short (15-50 msec.) blast of noise and the reverb chamber reduces peak levels and increases the duration of the noise. The chamber also has a capacitance function which minimizes downstream exhaust pressure. - The exhaust manifold 16 bolts to the side of the air
motor air valve 14 and serves to direct, muffle and diffuse the air motor exhaust using several components. A deflection plate disperses the initial exhaust blast as it leaves the air valve and enters the exhaust manifold. The deflection plate partially deflects the port noise and slows down and spreads out the tightly focused blast thereby reducing noise and exhaust velocity. A diffraction plate in the exhaust manifold diffracts and disperses the exhaust blast through many small holes rather one larger cross-section again reducing noise and exhaust velocity. An expansion chamber is provided in the manifold to direct the exhaust out of the air valve and down the center of the muffler. The muffler cross-section is also split into an expansion chamber and a nozzle with the expansion chamber allowing the exhaust blast to expand and dissipate before exiting the manifold through the diffraction plate and nozzle. - It is contemplated that various changes and modifications may be made to the exhaust system without departing from the spirit and scope of the invention as defined by the following claims.
Claims (7)
1. An exhaust for use with a reciprocating air motor having an air valve, said exhaust comprising:
a finned exhaust manifold;
a muffler;
air passages for drawing warm ambient air into said muffler so that heat from said warm ambient air is conducted through said finned manifold to melt ice that can form inside the manifold during the exhaust cycle.
2. The exhaust of claim 1 wherein said manifold directs the exhaust air stream into said muffler such that it creates a thin high velocity air stream creating a low pressure region on both sides of the stream due to the Bernoulli effect creating a pressure differential which draws the warm external air into the exhaust system.
3. The exhaust of claim 1 further comprising a reverberation chamber after the muffler exit allowing the sound waves to disperse over time while minimizing backpressure.
4. The exhaust of claim 1 wherein said exhaust manifold bolts to the side of said air motor air valve and serves to direct, muffle and diffuse the air motor exhaust.
5. The exhaust of claim 1 further comprising a deflection plate for dispersing the initial exhaust blast as it leaves said air valve and enters said exhaust manifold.
6. The exhaust of claim 1 further comprising a diffraction plate comprising many small holes in said exhaust manifold to diffract and disperse the exhaust blast to reduce noise and exhaust velocity.
7. The exhaust of claim 1 further comprising an expansion chamber in said manifold to direct the exhaust out of said air valve and down the center of said muffler.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US12/373,469 US20090288403A1 (en) | 2006-07-26 | 2007-07-25 | Icing resistant reduced noise air motor exhaust |
Applications Claiming Priority (3)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US82040506P | 2006-07-26 | 2006-07-26 | |
PCT/US2007/074324 WO2008014322A2 (en) | 2006-07-26 | 2007-07-25 | Icing resistant reduced noise air motor exhaust |
US12/373,469 US20090288403A1 (en) | 2006-07-26 | 2007-07-25 | Icing resistant reduced noise air motor exhaust |
Publications (1)
Publication Number | Publication Date |
---|---|
US20090288403A1 true US20090288403A1 (en) | 2009-11-26 |
Family
ID=38982295
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
US12/373,469 Abandoned US20090288403A1 (en) | 2006-07-26 | 2007-07-25 | Icing resistant reduced noise air motor exhaust |
Country Status (11)
Country | Link |
---|---|
US (1) | US20090288403A1 (en) |
EP (1) | EP2049353A4 (en) |
JP (1) | JP2009544897A (en) |
KR (1) | KR20090033277A (en) |
CN (1) | CN101495339A (en) |
AU (1) | AU2007279295A1 (en) |
BR (1) | BRPI0714951A2 (en) |
MX (1) | MX2009000904A (en) |
RU (1) | RU2009106652A (en) |
TW (1) | TW200830674A (en) |
WO (1) | WO2008014322A2 (en) |
Cited By (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US9156053B2 (en) | 2011-10-27 | 2015-10-13 | Graco Minnesota Inc. | Melter |
US9174231B2 (en) | 2011-10-27 | 2015-11-03 | Graco Minnesota Inc. | Sprayer fluid supply with collapsible liner |
US9796492B2 (en) | 2015-03-12 | 2017-10-24 | Graco Minnesota Inc. | Manual check valve for priming a collapsible fluid liner for a sprayer |
CN111587314A (en) * | 2018-01-15 | 2020-08-25 | 固瑞克明尼苏达有限公司 | Compressed air driven motor |
US11707753B2 (en) | 2019-05-31 | 2023-07-25 | Graco Minnesota Inc. | Handheld fluid sprayer |
Families Citing this family (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US10503039B2 (en) | 2013-06-28 | 2019-12-10 | View, Inc. | Controlling transitions in optically switchable devices |
FR2990379B1 (en) | 2012-05-10 | 2014-04-25 | Saint Gobain | GLAZING LIGHTING WITH DEFLECTOR INCORPORATED |
CN109205721A (en) * | 2018-08-18 | 2019-01-15 | 杜文娟 | Use the device for the method progress sea ice desalination for accelerating air-flow |
Citations (15)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US3789954A (en) * | 1973-06-19 | 1974-02-05 | Graco Inc | Air motor noise suppressor |
US4135602A (en) * | 1977-05-20 | 1979-01-23 | The Aro Corporation | Selectively positioned muffler |
US4461204A (en) * | 1980-07-25 | 1984-07-24 | Maco Meudon | Anti-freezing device for pneumatic tools |
US4496023A (en) * | 1982-09-16 | 1985-01-29 | Atlas Copco Aktiebolag | Pneumatically operated impact tool |
US4921408A (en) * | 1988-11-28 | 1990-05-01 | Graco Inc. | Non-icing quiet air-operated pump |
US4950113A (en) * | 1987-10-14 | 1990-08-21 | Chiron-Werke Gmbh & Co. Kg | Machine tool |
US4988268A (en) * | 1988-11-10 | 1991-01-29 | Man Design Co., Ltd. | Air compressor |
US5213484A (en) * | 1991-06-07 | 1993-05-25 | Nitto Kohki Co., Ltd. | Diaphragm pump unit |
US5363739A (en) * | 1993-10-12 | 1994-11-15 | Graco Inc. | Reduced icing low friction air valve |
US5366353A (en) * | 1994-04-13 | 1994-11-22 | Hand Kent P | Air valve with bleed feature to inhibit icing |
US5407330A (en) * | 1992-10-24 | 1995-04-18 | Mangar International Limited | Air pump apparatus with vibration and sound reducing housing means |
US5567127A (en) * | 1994-11-09 | 1996-10-22 | Wentz; Kennith W. | Low noise air blower |
US5847334A (en) * | 1996-05-21 | 1998-12-08 | Taga; Yotaro | Silencer mechanism for use in an impact wrench |
US6340069B1 (en) * | 2000-07-19 | 2002-01-22 | Meiko Pet Corporation | Sound elimination structure for air pump |
US20060147316A1 (en) * | 2004-09-27 | 2006-07-06 | Santa Ana Roland C | Quiet fluid pump |
Family Cites Families (6)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US4333754A (en) * | 1979-06-27 | 1982-06-08 | Vortec Corporation | Anti-icing noise-suppressing vortex tube assembly |
US4780076A (en) * | 1985-10-11 | 1988-10-25 | Arkansas Patents, Inc. | Power burner |
JPH02245401A (en) * | 1989-03-17 | 1990-10-01 | Nippon Gurei Kk | Antifreezing device for air motor |
US5189943A (en) * | 1992-07-31 | 1993-03-02 | Graco Inc. | Device for reducing icing |
US5371331A (en) * | 1993-06-25 | 1994-12-06 | Wall; Alan T. | Modular muffler for motor vehicles |
GB9315736D0 (en) | 1993-07-29 | 1993-09-15 | Binks Bullows Ltd | Motor |
-
2007
- 2007-07-25 BR BRPI0714951-4A patent/BRPI0714951A2/en not_active IP Right Cessation
- 2007-07-25 JP JP2009521982A patent/JP2009544897A/en active Pending
- 2007-07-25 AU AU2007279295A patent/AU2007279295A1/en not_active Abandoned
- 2007-07-25 CN CNA2007800285432A patent/CN101495339A/en active Pending
- 2007-07-25 MX MX2009000904A patent/MX2009000904A/en unknown
- 2007-07-25 WO PCT/US2007/074324 patent/WO2008014322A2/en active Application Filing
- 2007-07-25 RU RU2009106652/11A patent/RU2009106652A/en not_active Application Discontinuation
- 2007-07-25 KR KR1020097003714A patent/KR20090033277A/en not_active Application Discontinuation
- 2007-07-25 US US12/373,469 patent/US20090288403A1/en not_active Abandoned
- 2007-07-25 EP EP07840510A patent/EP2049353A4/en not_active Withdrawn
- 2007-07-26 TW TW096127376A patent/TW200830674A/en unknown
Patent Citations (15)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US3789954A (en) * | 1973-06-19 | 1974-02-05 | Graco Inc | Air motor noise suppressor |
US4135602A (en) * | 1977-05-20 | 1979-01-23 | The Aro Corporation | Selectively positioned muffler |
US4461204A (en) * | 1980-07-25 | 1984-07-24 | Maco Meudon | Anti-freezing device for pneumatic tools |
US4496023A (en) * | 1982-09-16 | 1985-01-29 | Atlas Copco Aktiebolag | Pneumatically operated impact tool |
US4950113A (en) * | 1987-10-14 | 1990-08-21 | Chiron-Werke Gmbh & Co. Kg | Machine tool |
US4988268A (en) * | 1988-11-10 | 1991-01-29 | Man Design Co., Ltd. | Air compressor |
US4921408A (en) * | 1988-11-28 | 1990-05-01 | Graco Inc. | Non-icing quiet air-operated pump |
US5213484A (en) * | 1991-06-07 | 1993-05-25 | Nitto Kohki Co., Ltd. | Diaphragm pump unit |
US5407330A (en) * | 1992-10-24 | 1995-04-18 | Mangar International Limited | Air pump apparatus with vibration and sound reducing housing means |
US5363739A (en) * | 1993-10-12 | 1994-11-15 | Graco Inc. | Reduced icing low friction air valve |
US5366353A (en) * | 1994-04-13 | 1994-11-22 | Hand Kent P | Air valve with bleed feature to inhibit icing |
US5567127A (en) * | 1994-11-09 | 1996-10-22 | Wentz; Kennith W. | Low noise air blower |
US5847334A (en) * | 1996-05-21 | 1998-12-08 | Taga; Yotaro | Silencer mechanism for use in an impact wrench |
US6340069B1 (en) * | 2000-07-19 | 2002-01-22 | Meiko Pet Corporation | Sound elimination structure for air pump |
US20060147316A1 (en) * | 2004-09-27 | 2006-07-06 | Santa Ana Roland C | Quiet fluid pump |
Cited By (7)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US9156053B2 (en) | 2011-10-27 | 2015-10-13 | Graco Minnesota Inc. | Melter |
US9174231B2 (en) | 2011-10-27 | 2015-11-03 | Graco Minnesota Inc. | Sprayer fluid supply with collapsible liner |
US9796492B2 (en) | 2015-03-12 | 2017-10-24 | Graco Minnesota Inc. | Manual check valve for priming a collapsible fluid liner for a sprayer |
US10315787B2 (en) | 2015-03-12 | 2019-06-11 | Graco Minnesota Inc. | Manual check valve for priming a collapsible fluid liner for a sprayer |
CN111587314A (en) * | 2018-01-15 | 2020-08-25 | 固瑞克明尼苏达有限公司 | Compressed air driven motor |
US11306590B2 (en) * | 2018-01-15 | 2022-04-19 | Graco Minnesota Inc. | Compressed air driven motor |
US11707753B2 (en) | 2019-05-31 | 2023-07-25 | Graco Minnesota Inc. | Handheld fluid sprayer |
Also Published As
Publication number | Publication date |
---|---|
EP2049353A2 (en) | 2009-04-22 |
TW200830674A (en) | 2008-07-16 |
KR20090033277A (en) | 2009-04-01 |
RU2009106652A (en) | 2010-09-10 |
CN101495339A (en) | 2009-07-29 |
WO2008014322A3 (en) | 2008-07-31 |
AU2007279295A1 (en) | 2008-01-31 |
JP2009544897A (en) | 2009-12-17 |
WO2008014322A2 (en) | 2008-01-31 |
MX2009000904A (en) | 2009-02-04 |
EP2049353A4 (en) | 2009-11-25 |
BRPI0714951A2 (en) | 2013-05-21 |
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Legal Events
Date | Code | Title | Description |
---|---|---|---|
STCB | Information on status: application discontinuation |
Free format text: ABANDONED -- FAILURE TO RESPOND TO AN OFFICE ACTION |