US20090288403A1 - Icing resistant reduced noise air motor exhaust - Google Patents

Icing resistant reduced noise air motor exhaust Download PDF

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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
Application number
US12/373,469
Inventor
David M. Behrens
Mark L. Bauck
John C. Holman
Mark T. Weinberger
Daniel P. Ross
Original Assignee
Behrens David M
Bauck Mark L
Holman John C
Weinberger Mark T
Ross Daniel P
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Priority to US82040506P priority Critical
Application filed by Behrens David M, Bauck Mark L, Holman John C, Weinberger Mark T, Ross Daniel P filed Critical Behrens David M
Priority to US12/373,469 priority patent/US20090288403A1/en
Priority to PCT/US2007/074324 priority patent/WO2008014322A2/en
Publication of US20090288403A1 publication Critical patent/US20090288403A1/en
Application status is Abandoned legal-status Critical

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Classifications

    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F01MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
    • F01BMACHINES OR ENGINES, IN GENERAL OR OF POSITIVE-DISPLACEMENT TYPE, e.g. STEAM ENGINES
    • F01B31/00Component parts, details, or accessories not provided for in, or of interest apart from, other groups
    • F01B31/02De-icing means for engines having icing phenomena
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F01MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
    • F01NGAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR MACHINES OR ENGINES IN GENERAL; GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR INTERNAL COMBUSTION ENGINES
    • F01N13/00Exhaust 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
    • F01N13/08Other arrangements or adaptations of exhaust conduits
    • F01N13/10Other arrangements or adaptations of exhaust conduits of exhaust manifolds

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

    TECHNICAL FIELD
  • This application claims the benefit of U.S. application Ser. No. 60/820,405, filed Jul. 26, 2006.
  • BACKGROUND ART
  • 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.
  • DISCLOSURE OF THE INVENTION
  • 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.
  • BRIEF DESCRIPTION OF DRAWINGS
  • FIG. 1 shows a cross-section f the air motor and in particular the exhaust system thereof.
  • BEST MODE FOR CARRYING OUT THE INVENTION
  • 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. 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 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 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.
  • 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.
US12/373,469 2006-07-26 2007-07-25 Icing resistant reduced noise air motor exhaust Abandoned US20090288403A1 (en)

Priority Applications (3)

Application Number Priority Date Filing Date Title
US82040506P true 2006-07-26 2006-07-26
US12/373,469 US20090288403A1 (en) 2006-07-26 2007-07-25 Icing resistant reduced noise air motor exhaust
PCT/US2007/074324 WO2008014322A2 (en) 2006-07-26 2007-07-25 Icing resistant reduced noise air motor exhaust

Applications Claiming Priority (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

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 (3)

* Cited by examiner, † Cited by third party
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

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2990379B1 (en) 2012-05-10 2014-04-25 Saint Gobain Glazing lighting with deflector incorporated
WO2019140175A1 (en) * 2018-01-15 2019-07-18 Graco Minnesota Inc. Compressed air driven motor

Citations (15)

* Cited by examiner, † Cited by third party
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)

* Cited by examiner, † Cited by third party
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

Patent Citations (15)

* Cited by examiner, † Cited by third party
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 (4)

* Cited by examiner, † Cited by third party
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

Also Published As

Publication number Publication date
EP2049353A4 (en) 2009-11-25
MX2009000904A (en) 2009-02-04
TW200830674A (en) 2008-07-16
WO2008014322A3 (en) 2008-07-31
AU2007279295A1 (en) 2008-01-31
BRPI0714951A2 (en) 2013-05-21
KR20090033277A (en) 2009-04-01
CN101495339A (en) 2009-07-29
JP2009544897A (en) 2009-12-17
RU2009106652A (en) 2010-09-10
WO2008014322A2 (en) 2008-01-31
EP2049353A2 (en) 2009-04-22

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Free format text: ABANDONED -- FAILURE TO RESPOND TO AN OFFICE ACTION